Bump cross-spawn from 6.0.5 to 6.0.6 (#169)

Bumps [cross-spawn](https://github.com/moxystudio/node-cross-spawn) from 6.0.5 to 6.0.6.
- [Changelog](https://github.com/moxystudio/node-cross-spawn/blob/v6.0.6/CHANGELOG.md)
- [Commits](https://github.com/moxystudio/node-cross-spawn/compare/v6.0.5...v6.0.6)

---
updated-dependencies:
- dependency-name: cross-spawn
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,7 @@
+Thanks for contributing to b3bp! As part of your PR, have you:
+
+- [ ] Added an item in [CHANGELOG.md](https://github.com/kvz/bash3boilerplate/blob/HEAD/CHANGELOG.md) with attribution?
+- [ ] Added your name to the [README.md](https://github.com/kvz/bash3boilerplate/blob/HEAD/README.md#authors)
+- [ ] Linted your code? (`make test` should do the trick)
+
+If so, great! Feel free to replace this message with a description of your work and hit submit!

.github/dependabot.yml

@@ -0,0 +1,5 @@
+groups:
+  production-dependencies:
+    dependency-type: 'production'
+  development-dependencies:
+    dependency-type: 'development'

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: b3bp CI
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types:
+      - opened
+      - synchronize
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 1
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 18.x
+      - name: Install
+        run: |
+          corepack yarn
+      - name: Lint
+        env:
+          SHELLCHECK_SEVERITY: warning
+        run: |
+          corepack yarn lint
+      - name: Test
+        run: |
+          corepack yarn test

.gitignore

@@ -1,2 +1,5 @@
-npm-debug.log
+.yarn
+assets/build
+env.sh
 node_modules
+npm-debug.log

.shellcheckrc

@@ -0,0 +1,3 @@
+external-sources=true
+shell=bash
+color=always

.travis.yml

@@ -1,7 +0,0 @@
-language: node_js
-node_js:
-  - "4.2.1"
-script: npm run test
-# For some reason, `sudo: false` broke nvm. Tried this build two times:
-# https://s3.amazonaws.com/archive.travis-ci.org/jobs/109619626/log.txt
-sudo: false

.vscode/bash3boilerplate.code-workspace

@@ -0,0 +1,8 @@
+{
+	"folders": [
+		{
+			"path": ".."
+		}
+	],
+	"settings": {}
+}

.yarnrc.yml

@@ -0,0 +1 @@
+nodeLinker: node-modules

CHANGELOG.md

@@ -0,0 +1,175 @@
+# Changelog
+
+Here's is a combined todo/done list. You can see what todos are planned for the upcoming release, as well as ideas that may/may not make into a release in `Ideas`.
+
+## Ideas
+
+Unplanned.
+
+- [ ] Better style guide checking (#84)
+
+## main
+
+Released: TBA.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/2.7.2...main).
+
+- [ ]
+
+## 2.7.2
+
+Released: 2023-08-29
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v2.4.1...2.7.2).
+
+- [x] Upgrade and cleanup node dependencies
+- [x] Remove lanyon-based website in favor of simple redirect to github for bash3boilerplate.sh
+- [x] Make tests pass again
+- [x] Make linting and style checking separate actions
+- [x] Add feature to edit/update comments in ini file (#132, @rfuehrer)
+- [x] Upgrade to `lanyon@0.1.16`
+- [x] Capture correct error_code in err_report (#124, @eval)
+- [x] Enhanced ini file handling: create new file, create new sections, handle default section, read key from given section (@rfuehrer)
+
+## v2.4.2
+
+Released: 2019-11-07.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v2.4.1...v2.4.2).
+
+- [x] Upgrade to `lanyon@0.1.16`
+- [x] Capture correct error_code in err_report (#124, @eval)
+- [x] Enhanced ini file handling: create new file, create new sections, handle default section, read key from given section (@rfuehrer)
+
+## v2.4.1
+
+Released: 2019-11-07.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v2.3.0...v2.4.1).
+
+- [x] Upgrade to `lanyon@0.1.7`
+- [x] Allow counting how many times an argument is used (@genesiscloud)
+- [x] Fix typos in megamount (thanks @gsaponaro)
+- [x] Enable color in screen or tmux (#92, @gmasse)
+- [x] Change `egrep` to `grep -E` in test and lib scripts to comply with ShellCheck (#92, @gmasse)
+- [x] Fix typo in FAQ (#92, @gmasse)
+- [x] Fix Travis CI failure on src/templater.sh (@gmasse)
+- [x] Add magic variable which contains full command invocation
+- [x] More contrasted alert and emergency colors (#111 @gmeral)
+- [x] Add support for repeatable arguments (@genesiscloud)
+- [x] Fix remaining warnings with shellcheck v0.7.0 (#107, @genesiscloud)
+
+## v2.4.0
+
+Released: 2016-12-21.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v2.3.0...v2.4.0).
+
+- [x] Upgrade to `lanyon@0.0.143`
+
+## v2.3.0
+
+Released: 2016-12-21.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v2.2.0...v2.3.0).
+
+- [x] Add magic variable `__i_am_main_script` to distinguish if b3bp is being sourced or called directly (#45, @zbeekman)
+- [x] Add style checks for tab characters and trailing whitespace (@zbeekman)
+- [x] Add backtracing to help localize errors (#44, @zbeekman)
+- [x] Additional FAQ entries (#47, suggested by @gdevenyi, implemented by @zbeekman)
+- [x] Ensure that shifting over `--` doesn't throw an errexit error (#21, @zbeekman)
+- [x] Add Pull Request template (#83)
+
+## v2.2.0
+
+Released: 2016-12-21.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v2.1.0...v2.2.0).
+
+- [x] README and FAQ improvements (#66, @mstreuhofer)
+- [x] Add support for sourcing b3bp (#61, @mstreuhofer)
+- [x] Upgrade all Node.js dependencies for development (#78)
+- [x] Switch to http://lanyon.io for static site building, add a new logo
+- [x] Cleanup environment variables (#58, @mstreuhofer)
+- [x] Support multi-line logs (#57, @mstreuhofer)
+- [x] Run shellcheck as part of the acceptance test (#79, @mstreuhofer)
+- [x] Brace all variables, used `[[` instead of `[` (#33, #76, @mstreuhofer)
+- [x] Add automatic usage validation for required args (#22, #65, @mstreuhofer)
+- [x] Remove all usage of eval (@mstreuhofer)
+- [x] Get rid of awk, sed & egrep usage (#71, @mstreuhofer)
+- [x] Fix auto-color-off code (#69, #70, @mstreuhofer)
+- [x] Use shellcheck to find and fix unclean code (#68, #80, @mstreuhofer)
+- [x] Allow for multiline opt description in `__usage` (#7, @mstreuhofer)
+- [x] Allow `__usage` and `__helptext` to be defined before sourcing `main.sh` thus makeing b3bp behave like a library (@mstreuhofer)
+- [x] Add the same License text to each script header (@mstreuhofer)
+
+## v2.1.0
+
+Released: 2016-11-08.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v2.0.0...v2.1.0).
+
+- [x] Cleanup b3bp variables (adds prefixes across the board) (thanks @mstreuhofer)
+- [x] Add multi-line logging support (thanks @mstreuhofer)
+- [x] Mangle long-option names to allow dashes (thanks @zbeekman)
+- [x] Remove OS detection altogether (#38, thx @zbeekman)
+- [x] Offer the main template for download as http://bash3boilerplate.sh/main.sh
+- [x] Better OS detection (#38, thx @moviuro)
+- [x] Improve README copy (#34, thx galaktos)
+- [x] Fix unquoted variable access within (#34 thx galaktos)
+- [x] For delete-key-friendliness, bundle the commandline definition block along with its parser
+- [x] Less verbose header comments
+- [x] For delete-key-friendliness, don't crash on undeclared help vars
+- [x] Introduce `errtrace`, which is on by default (BREAKING)
+- [x] Add a configurable `helptext` that is left alone by the parses and allows you to have a richer help
+- [x] Add a simple documentation website
+- [x] Add best practice of using `__double_underscore_prefixed_vars` to indicate global variables that are solely controlled inside your script
+- [x] Make license more permissive by not requiring distribution of the LICENSE file if the copyright & attribution comments are left intact
+- [x] Respect `--no-color` by setting the `NO_COLOR` flag in `main.sh` (#25, thx @gdevenyi)
+- [x] Split out changelog into separate file
+- [x] Added a [FAQ](./FAQ.md) (#15, #14, thanks @rouson)
+- [x] Fix Travis OSX testing (before, it would silently pass failures) (#10)
+- [x] Enable dashes in long, GNU style options, as well as numbers (thanks @zbeekman)
+
+## v2.0.0
+
+Released: 2016-02-17.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v1.2.1...v2.0.0).
+
+- [x] Add tests for `templater` and follow Library export best practices
+- [x] Add tests for `ini_val` and follow Library export best practices
+- [x] Add tests for `parse_url` and follow Library export best practices
+- [x] Add tests for `megamount` and follow Library export best practices
+- [x] Remove `bump` from `src` (BREAKING)
+- [x] Remove `semver` from `src` (BREAKING)
+
+## v1.2.1
+
+Released: 2016-02-17.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v1.2.0...v1.2.1).
+
+- [x] Add Travis CI automated testing for OSX (thanks @zbeekman)
+
+## v1.2.0
+
+Released: 2016-02-16.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v1.1.0...v1.2.0).
+
+- [x] Allow disabling colors via `NO_COLOR` environment variable
+- [x] Enable `errexit`, `nounset` and `pipefail` options at the top of the script already
+- [x] More refined colors (thanks @arathai)
+- [x] Add a changelog to the README
+- [x] Add `__os` magic var (limited to discovering OSX and defaulting to Linux for now)
+- [x] Add `__base` magic var (`main`, if the source script is `main.sh`)
+- [x] Enable long, GNU style options (thanks @zbeekman)
+- [x] Add Travis CI automated testing for Linux
+
+## v1.1.0
+
+Released: 2015-06-29.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/v1.0.3...v1.1.0).
+
+- [x] Add `ALLOW_REMAINDERS` configuration to templater
+- [x] Fix typo: 'debugmdoe' to 'debugmode' (thanks @jokajak)
+- [x] Use `${BASH_SOURCE[0]}` for `__file` instead of `${0}`
+
+## v1.0.3
+
+Released: 2014-11-02.
+[Diff](https://github.com/kvz/bash3boilerplate/compare/5db569125319a89b9561b434db84e4d91faefb63...v1.0.3).
+
+- [x] Add `ini_val`, `megamount`, `parse_url`
+- [x] Add re-usable libraries in `./src`
+- [x] Use npm as an additional distribution channel

FAQ.md

@@ -0,0 +1,171 @@
+[This document is formatted with GitHub-Flavored Markdown. ]: #
+[For better viewing, including hyperlinks, read it online at ]: #
+[https://github.com/kvz/bash3boilerplate/blob/HEAD/FAQ.md ]: #
+
+## Contents
+
+- [What is a CLI](#what-is-a-cli)?
+- [How do I incorporate BASH3 Boilerplate into my own project](#how-do-i-incorporate-bash3-boilerplate-into-my-own-project)?
+- [How do I add a command-line flag](#how-do-i-add-a-command-line-flag)?
+- [How do I access the value of a command-line argument](#how-do-i-access-the-value-of-a-command-line-argument)?
+- [What is a magic variable](#what-is-a-magic-variable)?
+- [How do I submit an issue report](#how-do-i-submit-an-issue-report)?
+- [How can I contribute to this project](#how-can-i-contribute-to-this-project)?
+- [Why are you typing BASH in all caps](#why-are-you-typing-bash-in-all-caps)?
+- [You are saying you are portable, but why won't b3bp code run in dash / busybox / posh / ksh / mksh / zsh](#you-are-saying-you-are-portable-but-why-wont-b3bp-code-run-in-dash--busybox--posh--ksh--mksh--zsh)?
+- [How do I do Operating System detection](#how-do-i-do-operating-system-detection)?
+- [How do I access a potentially unset (environment) variable](#how-do-i-access-a-potentially-unset-environment-variable)?
+- [How can I detect or trap CTRL-C and other signals](#how-can-i-detect-or-trap-ctrl-c-and-other-signals)?
+- [How can I get the PID of my running script](how-can-i-get-the-pid-of-my-running-script)?
+
+<!--more-->
+
+# Frequently Asked Questions
+
+## What is a CLI?
+
+A "CLI" is a [command-line interface](https://en.wikipedia.org/wiki/Command-line_interface).
+
+## How do I incorporate BASH3 Boilerplate into my own project?
+
+You can incorporate BASH3 Boilerplate into your project in one of two ways:
+
+1. Copy the desired portions of [`main.sh`](http://bash3boilerplate.sh/main.sh) into your own script.
+1. Download [`main.sh`](http://bash3boilerplate.sh/main.sh) and start pressing the delete-key to remove unwanted things
+
+Once the `main.sh` has been tailor-made for your project, you can either append your own script in the same file, or source it in the following ways:
+
+1. Copy [`main.sh`](http://bash3boilerplate.sh/main.sh) into the same directory as your script and then edit and embed it into your script using Bash's `source` include feature, e.g.:
+
+```bash
+#!/usr/bin/env bash
+source main.sh
+```
+
+1. Source [`main.sh`](http://bash3boilerplate.sh/main.sh) in your script or at the command line:
+
+```bash
+#!/usr/bin/env bash
+source main.sh
+```
+
+## How do I add a command-line flag?
+
+1. Copy the line from the `main.sh` [read block](https://github.com/kvz/bash3boilerplate/blob/v2.1.0/main.sh#L109-L115) that most resembles the desired behavior and paste the line into the same block.
+1. Edit the single-character (e.g., `-d`) and, if present, the multi-character (e.g., `--debug`) versions of the flag in the copied line.
+1. Omit the `[arg]` text in the copied line, if the desired flag takes no arguments.
+1. Omit or edit the text after `Default=` to set or not set default values, respectively.
+1. Omit the `Required.` text, if the flag is optional.
+
+## How do I access the value of a command-line argument?
+
+To find out the value of an argument, append the corresponding single-character flag to the text `$arg_`. For example, if the [read block]
+contains the line
+
+```bash
+   -t --temp  [arg] Location of tempfile. Default="/tmp/bar"
+```
+
+then you can evaluate the corresponding argument and assign it to a variable as follows:
+
+```bash
+__temp_file_name="${arg_t}"
+```
+
+## What is a magic variable?
+
+The [magic variables](https://github.com/kvz/bash3boilerplate/blob/v2.1.0/main.sh#L26-L28) in `main.sh` are special in that they have a different value, depending on your environment. You can use `${__file}` to get a reference to your current script, and `${__dir}` to get a reference to the directory it lives in. This is not to be confused with the location of the calling script that might be sourcing the `${__file}`, which is accessible via `${0}`, or the current directory of the administrator running the script, accessible via `$(pwd)`.
+
+## How do I submit an issue report?
+
+Please visit our [Issues](https://github.com/kvz/bash3boilerplate/issues) page.
+
+## How can I contribute to this project?
+
+Please fork this repository. After that, create a branch containing your suggested changes and submit a pull request based on the main branch
+of <https://github.com/kvz/bash3boilerplate/>. We are always more than happy to accept your contributions!
+
+## Why are you typing BASH in all caps?
+
+As an acronym, Bash stands for Bourne-again shell, and is usually written with one uppercase.
+This project's name, however, is "BASH3 Boilerplate". It is a reference to
+"[HTML5 Boilerplate](https://html5boilerplate.com/)", which was founded to serve a similar purpose,
+only for crafting webpages.
+Somewhat inconsistent – but true to Unix ancestry – the abbreviation for our project is "b3bp".
+
+## You are saying you are portable, but why won't b3bp code run in dash / busybox / posh / ksh / mksh / zsh?
+
+When we say _portable_, we mean across Bash versions. Bash is widespread and most systems
+offer at least version 3 of it. Make sure you have that available and b3bp will work for you.
+
+We run automated tests to make sure that it will. Here is some proof for the following platforms:
+
+- [Linux](https://travis-ci.org/kvz/bash3boilerplate/jobs/109804166#L91-L94) `GNU bash, version 4.2.25(1)-release (x86_64-pc-linux-gnu)`
+- [OSX](https://travis-ci.org/kvz/bash3boilerplate/jobs/109804167#L2453-L2455) `GNU bash, version 3.2.51(1)-release (x86_64-apple-darwin13)`
+
+This portability, however, does not mean that we try to be compatible with
+KornShell, Zsh, posh, yash, dash, or other shells. We allow syntax that would explode if
+you pasted it in anything but Bash 3 and up.
+
+## How do I do Operating System detection?
+
+We used to offer a magic `__os` variable, but we quickly [discovered](https://github.com/kvz/bash3boilerplate/issues/38) that it would be hard
+to create a satisfactory abstraction that is not only correct, but also covers enough use-cases,
+while still having a relatively small footprint in `main.sh`.
+
+For simple OS detection, we recommend using the `${OSTYPE}` variable available in Bash as
+is demoed in [this stackoverflow post](http://stackoverflow.com/a/8597411/151666):
+
+```bash
+if [[ "${OSTYPE}" = "linux-gnu" ]]; then
+  echo "GNU Linux"
+elif [[ "${OSTYPE}" = "darwin"* ]]; then
+  echo "Mac OSX"
+elif [[ "${OSTYPE}" = "cygwin" ]]; then
+  echo "POSIX compatibility layer and Linux environment emulation for Windows"
+elif [[ "${OSTYPE}" = "msys" ]]; then
+  echo "Lightweight shell and GNU utilities compiled for Windows (part of MinGW)"
+elif [[ "${OSTYPE}" = "win32" ]]; then
+  echo "I'm not sure this can happen."
+elif [[ "${OSTYPE}" = "freebsd"* ]]; then
+  echo "..."
+else
+  echo "Unknown."
+fi
+```
+
+## How do I access a potentially unset (environment) variable?
+
+The set -o nounset line in `main.sh` causes error termination when an unset environment variables is detected as unbound. There are multiple ways to avoid this.
+
+Some code to illustrate:
+
+```bash
+# method 1
+echo ${NAME1:-Damian} # echos Damian, $NAME1 is still unset
+# method 2
+echo ${NAME2:=Damian} # echos Damian, $NAME2 is set to Damian
+# method 3
+NAME3=${NAME3:-Damian}; echo ${NAME3} # echos Damian, $NAME3 is set to Damian
+```
+
+This subject is briefly touched on as well in the [Safety and Portability section under point 5](README.md#safety-and-portability). b3bp currently uses [method 1](https://github.com/kvz/bash3boilerplate/blob/v2.1.0/main.sh#L252) when we want to access a variable that could be undeclared, and [method 3](https://github.com/kvz/bash3boilerplate/blob/v2.1.0/main.sh#L31) when we also want to set a default to an undeclared variable, because we feel it is more readable than method 2. We feel `:=` is easily overlooked, and not very beginner friendly. Method 3 seems more explicit in that regard in our humble opinion.
+
+## How can I detect or trap Ctrl-C and other signals?
+
+You can trap [Unix signals](https://en.wikipedia.org/wiki/Unix_signal) like [Ctrl-C](https://en.wikipedia.org/wiki/Control-C) with code similar to:
+
+```bash
+# trap ctrl-c and call ctrl_c()
+trap ctrl_c INT
+
+function ctrl_c() {
+        echo "** Trapped CTRL-C"
+}
+```
+
+See http://mywiki.wooledge.org/SignalTrap for a list of signals, examples, and an in depth discussion.
+
+## How can I get the PID of my running script?
+
+The PID of a running script is contained in the `${$}` variable. This is _not_ the pid of any subshells. With Bash 4 you can get the PID of your subshell with `${BASHPID}`. For a comprehensive list of Bash built in variables see, e.g., http://www.tldp.org/LDP/abs/html/internalvariables.html

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2014 Kevin van Zonneveld
+Copyright (c) 2013 Kevin van Zonneveld and contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -18,4 +18,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+SOFTWARE.

Makefile

@@ -3,6 +3,9 @@
 #
 # https://www.npmjs.com/package/fakefile
 #
+# Please do not edit this file directly, but propose changed upstream instead:
+# https://github.com/kvz/fakefile/blob/main/Makefile
+#
 # This Makefile offers convience shortcuts into any Node.js project that utilizes npm scripts.
 # It functions as a wrapper around the actual listed in `package.json`
 # So instead of typing:
@@ -25,10 +28,26 @@
 #   OSX users will have to install bash-completion
 #   (http://davidalger.com/development/bash-completion-on-os-x-with-brew/)
 
+ifeq ($(shell test -e ./yarn.lock && echo -n yes),yes)
+	RUNNER=yarn
+	INSTALLER=yarn install
+else
+	RUNNER=npm run
+	INSTALLER=npm install
+endif
+
 define npm_script_targets
-TARGETS := $(shell node -e 'for (var k in require("./package.json").scripts) {console.log(k.replace(/:/g, "-"));}')
+TARGETS := $(shell \
+	node -e 'for (var k in require("./package.json").scripts) {console.log(k.replace(/:/g, "-"));}'
+		| grep -v -E "^install$$"
+)
 $$(TARGETS):
-	npm run $(subst -,:,$(MAKECMDGOALS))
+	$(RUNNER) $(shell \
+							node -e 'for (var k in require("./package.json").scripts) {console.log(k.replace(/:/g, "-"), k);}'
+								| grep -E "^$(MAKECMDGOALS)\s"
+								| head -n1
+								| awk '{print $$2}'
+							)
 
 .PHONY: $$(TARGETS)
 endef
@@ -37,4 +56,4 @@ $(eval $(call npm_script_targets))
 
 # These npm run scripts are available, without needing to be mentioned in `package.json`
 install:
-	npm run install
+	$(INSTALLER)

README.md

@@ -1,104 +1,109 @@
-[![Build Status](https://travis-ci.org/kvz/bash3boilerplate.svg?branch=master)](https://travis-ci.org/kvz/bash3boilerplate)
+[This document is formatted with GitHub-Flavored Markdown. ]: #
+[For better viewing, including hyperlinks, read it online at ]: #
+[https://github.com/kvz/bash3boilerplate/blob/HEAD/README.md]: #
 
-When hacking up BASH scripts, I often find there are some
-higher level things like logging, configuration, command-line argument
-parsing that:
+- [Overview](#overview)
+- [Goals](#goals)
+- [Features](#features)
+- [Installation](#installation)
+- [Changelog](#changelog)
+- [Frequently Asked Questions](#frequently-asked-questions)
+- [Best Practices](#best-practices)
+- [Who uses b3bp](#who-uses-b3bp)
+- [Authors](#authors)
+- [License](#license)
 
- - I need every time
- - Take quite some effort to get right
- - Keep you from your actual work
+## Overview
+
+<!--more-->
+
+When hacking up Bash scripts, there are often things such as logging or command-line argument parsing that:
+
+- You need every time
+- Come with a number of pitfalls you want to avoid
+- Keep you from your actual work
 
 Here's an attempt to bundle those things in a generalized way so that
-they are reusable as-is in most of my (and hopefully your, if not ping
-me) programs.
+they are reusable as-is in most scripts.
+
+We call it "BASH3 Boilerplate" or b3bp for short.
 
 ## Goals
 
-Delete-key-friendly. I propose people use `main.sh` as a base and remove the
-parts they don't need, rather than introducing a ton of packages, includes, compilers, etc.
+Delete-Key-**Friendly**. Instead of introducing packages, includes, compilers, etc., we propose using [`main.sh`](https://bash3boilerplate.sh/main.sh) as a base and removing the parts you don't need.
+While this may feel a bit archaic at first, it is exactly the strength of Bash scripts that we should want to embrace.
 
-Aiming for portability, I'm targeting Bash 3 (OSX still ships
-with 3 for instance). If you're going to ask people to install
+**Portable**. We are targeting Bash 3 (OSX still ships
+with 3, for instance). If you are going to ask people to install
 Bash 4 first, you might as well pick a more advanced language as a
 dependency.
 
 ## Features
 
-- Structure
+- Conventions that will make sure that all your scripts follow the same, battle-tested structure
+- Safe by default (break on error, pipefail, etc.)
 - Configuration by environment variables
-- Configuration by command-line arguments (definitions parsed from help info,
-  so no duplication needed)
-- Magic variables like `__file` and `__dir`
-- Logging that supports colors and is compatible with [Syslog Severity levels](http://en.wikipedia.org/wiki/Syslog#Severity_levels)
+- Simple command-line argument parsing that requires no external dependencies. Definitions are parsed from help info, ensuring there will be no duplication
+- Helpful magic variables like `__file` and `__dir`
+- Logging that supports colors and is compatible with [Syslog Severity levels](https://en.wikipedia.org/wiki/Syslog#Severity_levels), as well as the [twelve-factor](https://12factor.net/) guidelines
 
 ## Installation
 
-There are 3 ways you can install (parts of) b3bp:
+There are three different ways to install b3bp:
 
-1. Just get the main template: `wget https://raw.githubusercontent.com/kvz/bash3boilerplate/master/main.sh`
-2. Clone the entire project: `git clone git@github.com:kvz/bash3boilerplate.git`
-3. As of `v1.0.3`, b3bp can be installed as a `package.json` dependency via: `npm install --save bash3boilerplate`
+### Option 1: Download the main template
 
-Although `3` introduces a node.js dependency, this does allow for easy version pinning & distrubtions in environments that already have this prerequisite. But nothing prevents you from just using `curl` and keep your project or build system low on external dependencies.
+Use curl or wget to download the source and save it as your script. Then you can start deleting the unwanted bits, and adding your own logic.
 
-## Versioning
+```bash
+wget https://bash3boilerplate.sh/main.sh
+vim main.sh
+```
 
-This project implements the Semantic Versioning guidelines.
+### Option 2: Clone the entire project
 
-Releases will be numbered with the following format:
+Besides `main.sh`, this will also get you the entire b3bp repository. This includes a few extra functions that we keep in the `./src` directory.
 
-`<major>.<minor>.<patch>`
+```bash
+git clone git@github.com:kvz/bash3boilerplate.git
+```
 
-And constructed with the following guidelines:
+### Option 3: Require via npm
 
-- Breaking backward compatibility bumps the major (and resets the minor and patch)
-- New additions without breaking backward compatibility bumps the minor (and resets the patch)
-- Bug fixes and misc changes bumps the patch
+As of `v1.0.3`, b3bp can also be installed as a Node module, meaning you can define it as a dependency in `package.json` via:
 
-For more information on SemVer, please visit [http://semver.org](http://semver.org).
+```bash
+npm init
+npm install --save --save-exact bash3boilerplate
+```
+
+Even though this option introduces a Node.js dependency, it does allow for easy version pinning and distribution in environments that already have this prerequisite. This is, however, entirely optional and nothing prevents you from ignoring this possibility.
 
 ## Changelog
 
-### v1.2.0 (Unreleased)
+Please see the [CHANGELOG.md](./CHANGELOG.md) file.
 
-- Allow disabling colors via `NO_COLOR` environment variable
-- Enable errexit, nounset and pipefail at the top
-- More refined colors (thanks @arathai)
-- Add Changelog
-- Add `__os` magic var
-- Add `__base` magic var
-- Enable long, GNU style options (thanks @zbeekman)
+## Frequently Asked Questions
 
-### v1.1.0 (2015-06-29)
-
-- Add `ALLOW_REMAINDERS` configuration to templater
-- Fix typo: 'debugmdoe' to 'debugmode' (thanks @jokajak)
-- Use `${BASH_SOURCE[0]}` for `__file` instead of `${0}`
-
-### v1.0.3 (2014-11-02)
-
-- Add `ini_val`, `megamount`, `parse_url`
-- Add re-usable libraries in `./src`
-- Use npm for distribution
+Please see the [FAQ.md](./FAQ.md) file.
 
 ## Best practices
 
-As of `v1.0.3`, b3bp adds some nice re-usable libraries in `./src`. Later on we'll be using snippets inside this directory to build custom packages. In order to make the snippets in `./src` more useful, we recommend these guidelines.
+As of `v1.0.3`, b3bp offers some nice re-usable libraries in `./src`. In order to make the snippets in `./src` more useful, we recommend the following guidelines.
 
-### Library exports
+### Function packaging
 
-It's nice to have a bash package that can be used in the terminal and also be invoked as a command line function. To achieve this the exporting of your functionality *should* follow this pattern:
+It is nice to have a Bash package that can not only be used in the terminal, but also invoked as a command line function. In order to achieve this, the exporting of your functionality _should_ follow this pattern:
 
 ```bash
-if [ "${BASH_SOURCE[0]}" != ${0} ]; then
-  export -f my_script
-else
+if [[ "${BASH_SOURCE[0]}" = "${0}" ]]; then
   my_script "${@}"
   exit $?
 fi
+export -f my_script
 ```
 
-This allows a user to `source` your script or invoke as a script.
+This allows a user to `source` your script or invoke it as a script.
 
 ```bash
 # Running as a script
@@ -108,24 +113,63 @@ $ source my_script.sh
 $ my_script some more args --blah
 ```
 
-(taken from the [bpkg](https://raw.githubusercontent.com/bpkg/bpkg/master/README.md) project)
+(taken from the [bpkg](https://raw.githubusercontent.com/bpkg/bpkg/HEAD/README.md) project)
 
-## Todo
+### Scoping
 
-- [ ] Make `src` libs adhere to Best practices
-- [ ] `make build` system for generating custom builds
-- [ ] tests & releases via Travis
+1. In functions, use `local` before every variable declaration.
+1. Use `UPPERCASE_VARS` to indicate environment variables that can be controlled outside your script.
+1. Use `__double_underscore_prefixed_vars` to indicate global variables that are solely controlled inside your script, with the exception of arguments that are already prefixed with `arg_`, as well as functions, over which b3bp poses no restrictions.
 
-## Sponsoring
+### Coding style
 
-<!-- badges/ -->
-[![Gittip donate button](http://img.shields.io/gittip/kvz.png)](https://www.gittip.com/kvz/ "Sponsor the development of bash3boilerplate via Gittip")
-[![Flattr donate button](http://img.shields.io/flattr/donate.png?color=green)](https://flattr.com/submit/auto?user_id=kvz&url=https://github.com/kvz/bash3boilerplate&title=bash3boilerplate&language=&tags=github&category=software "Sponsor the development of bash3boilerplate via Flattr")
-[![PayPayl donate button](http://img.shields.io/paypal/donate.png?color=green)](https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=kevin%40vanzonneveld%2enet&lc=NL&item_name=Open%20source%20donation%20to%20Kevin%20van%20Zonneveld&currency_code=USD&bn=PP-DonationsBF%3abtn_donate_SM%2egif%3aNonHosted "Sponsor the development of bash3boilerplate via Paypal")
-[![BitCoin donate button](http://img.shields.io/bitcoin/donate.png?color=green)](https://coinbase.com/checkouts/19BtCjLCboRgTAXiaEvnvkdoRyjd843Dg2 "Sponsor the development of bash3boilerplate via BitCoin")
-<!-- /badges -->
+1. Use two spaces for tabs, do not use tab characters.
+1. Do not introduce whitespace at the end of lines or on blank lines as they obfuscate version control diffs.
+1. Use long options (`logger --priority` vs `logger -p`). If you are on the CLI, abbreviations make sense for efficiency. Nevertheless, when you are writing reusable scripts, a few extra keystrokes will pay off in readability and avoid ventures into man pages in the future, either by you or your collaborators. Similarly, we prefer `set -o nounset` over `set -u`.
+1. Use a single equal sign when checking `if [[ "${NAME}" = "Kevin" ]]`; double or triple signs are not needed.
+1. Use the new bash builtin test operator (`[[ ... ]]`) rather than the old single square bracket test operator or explicit call to `test`.
+
+### Safety and Portability
+
+1. Use `{}` to enclose your variables. Otherwise, Bash will try to access the `$ENVIRONMENT_app` variable in `/srv/$ENVIRONMENT_app`, whereas you probably intended `/srv/${ENVIRONMENT}_app`. Since it is easy to miss cases like this, we recommend that you make enclosing a habit.
+1. Use `set`, rather than relying on a shebang like `#!/usr/bin/env bash -e`, since that is neutralized when someone runs your script as `bash yourscript.sh`.
+1. Use `#!/usr/bin/env bash`, as it is more portable than `#!/bin/bash`.
+1. Use `${BASH_SOURCE[0]}` if you refer to current file, even if it is sourced by a parent script. In other cases, use `${0}`.
+1. Use `:-` if you want to test variables that could be undeclared. For instance, with `if [[ "${NAME:-}" = "Kevin" ]]`, `$NAME` will evaluate to `Kevin` if the variable is empty. The variable itself will remain unchanged. The syntax to assign a default value is `${NAME:=Kevin}`.
+
+## Who uses b3bp?
+
+- [Transloadit](https://transloadit.com)
+- [OpenCoarrays](https://www.opencoarrays.org)
+- [Sourcery Institute](https://www.sourceryinstitute.org)
+- [Computational Brain Anatomy Laboratory](https://cobralab.ca/)
+- [Genesis Cloud](https://genesiscloud.com/)
+
+We are looking for endorsements! Are you also using b3bp? [Let us know](https://github.com/kvz/bash3boilerplate/issues/new?title=I%20use%20b3bp) and get listed.
+
+## Authors
+
+- [Kevin van Zonneveld](https://kvz.io)
+- [Izaak Beekman](https://izaakbeekman.com/)
+- [Manuel Streuhofer](https://github.com/mstreuhofer)
+- [Alexander Rathai](mailto:Alexander.Rathai@gmail.com)
+- [Dr. Damian Rouson](https://www.sourceryinstitute.org/) (documentation, feedback)
+- [@jokajak](https://github.com/jokajak) (documentation)
+- [Gabriel A. Devenyi](https://staticwave.ca/) (feedback)
+- [@bravo-kernel](https://github.com/bravo-kernel) (feedback)
+- [@skanga](https://github.com/skanga) (feedback)
+- [galaktos](https://www.reddit.com/user/galaktos) (feedback)
+- [@moviuro](https://github.com/moviuro) (feedback)
+- [Giovanni Saponaro](https://github.com/gsaponaro) (feedback)
+- [Germain Masse](https://github.com/gmasse)
+- [A. G. Madi](https://github.com/warpengineer)
+- [Lukas Stockner](mailto:oss@genesiscloud.com)
+- [Gert Goet](https://github.com/eval)
+- [@rfuehrer](https://github.com/rfuehrer)
 
 ## License
 
-Copyright (c) 2013 Kevin van Zonneveld, [http://kvz.io](http://kvz.io)  
-Licensed under MIT: [http://kvz.io/licenses/LICENSE-MIT](http://kvz.io/licenses/LICENSE-MIT)
+Copyright (c) 2013 Kevin van Zonneveld and [contributors](https://github.com/kvz/bash3boilerplate#authors).
+Licensed under [MIT](https://raw.githubusercontent.com/kvz/bash3boilerplate/HEAD/LICENSE).
+You are not obligated to bundle the LICENSE file with your b3bp projects as long
+as you leave these references intact in the header comments of your source files.

docs/CNAME

@@ -0,0 +1 @@
+bash3boilerplate.sh

docs/index.html

@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta
+      http-equiv="refresh"
+      content="0;url=https://github.com/kvz/bash3boilerplate"
+    />
+    <title>Redirecting...</title>
+  </head>
+  <body>
+    If you are not redirected,
+    <a href="https://github.com/kvz/bash3boilerplate">click here</a>.
+  </body>
+</html>

example.sh

@@ -0,0 +1,147 @@
+#!/usr/bin/env bash
+# This file:
+#
+#  - Demos BASH3 Boilerplate (change this for your script)
+#
+# Usage:
+#
+#  LOG_LEVEL=7 ./example.sh -f /tmp/x -d (change this for your script)
+#
+# Based on a template by BASH3 Boilerplate v2.3.0
+# http://bash3boilerplate.sh/#authors
+#
+# The MIT License (MIT)
+# Copyright (c) 2013 Kevin van Zonneveld and contributors
+# You are not obligated to bundle the LICENSE file with your b3bp projects as long
+# as you leave these references intact in the header comments of your source files.
+
+
+### BASH3 Boilerplate (b3bp) Header
+##############################################################################
+
+# Commandline options. This defines the usage page, and is used to parse cli
+# opts & defaults from. The parsing is unforgiving so be precise in your syntax
+# - A short option must be preset for every long option; but every short option
+#   need not have a long option
+# - `--` is respected as the separator between options and arguments
+# - We do not bash-expand defaults, so setting '~/app' as a default will not resolve to ${HOME}.
+#   you can use bash variables to work around this (so use ${HOME} instead)
+
+# shellcheck disable=SC2034
+read -r -d '' __usage <<-'EOF' || true # exits non-zero when EOF encountered
+  -f --file  [arg] Filename to process. Required.
+  -t --temp  [arg] Location of tempfile. Default="/tmp/bar"
+  -v               Enable verbose mode, print script as it is executed
+  -d --debug       Enables debug mode
+  -h --help        This page
+  -n --no-color    Disable color output
+  -1 --one         Do just one thing
+  -i --input [arg] File to process. Can be repeated.
+  -x               Specify a flag. Can be repeated.
+EOF
+
+# shellcheck disable=SC2034
+read -r -d '' __helptext <<-'EOF' || true # exits non-zero when EOF encountered
+ This is Bash3 Boilerplate's help text. Feel free to add any description of your
+ program or elaborate more on command-line arguments. This section is not
+ parsed and will be added as-is to the help.
+EOF
+
+# shellcheck source=main.sh
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/main.sh"
+
+
+### Signal trapping and backtracing
+##############################################################################
+
+function __b3bp_cleanup_before_exit () {
+  info "Cleaning up. Done"
+}
+trap __b3bp_cleanup_before_exit EXIT
+
+# requires `set -o errtrace`
+__b3bp_err_report() {
+    local error_code=${?}
+    # shellcheck disable=SC2154
+    error "Error in ${__file} in function ${1} on line ${2}"
+    exit ${error_code}
+}
+# Uncomment the following line for always providing an error backtrace
+# trap '__b3bp_err_report "${FUNCNAME:-.}" ${LINENO}' ERR
+
+
+### Command-line argument switches (like -d for debugmode, -h for showing helppage)
+##############################################################################
+
+# debug mode
+if [[ "${arg_d:?}" = "1" ]]; then
+  set -o xtrace
+  PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
+  LOG_LEVEL="7"
+  # Enable error backtracing
+  trap '__b3bp_err_report "${FUNCNAME:-.}" ${LINENO}' ERR
+fi
+
+# verbose mode
+if [[ "${arg_v:?}" = "1" ]]; then
+  set -o verbose
+fi
+
+# no color mode
+if [[ "${arg_n:?}" = "1" ]]; then
+  NO_COLOR="true"
+fi
+
+# help mode
+if [[ "${arg_h:?}" = "1" ]]; then
+  # Help exists with code 1
+  help "Help using ${0}"
+fi
+
+
+### Validation. Error out if the things required for your script are not present
+##############################################################################
+
+[[ "${arg_f:-}" ]]     || help      "Setting a filename with -f or --file is required"
+[[ "${LOG_LEVEL:-}" ]] || emergency "Cannot continue without LOG_LEVEL. "
+
+
+### Runtime
+##############################################################################
+
+# shellcheck disable=SC2154
+info "__i_am_main_script: ${__i_am_main_script}"
+# shellcheck disable=SC2154
+info "__file: ${__file}"
+# shellcheck disable=SC2154
+info "__dir: ${__dir}"
+# shellcheck disable=SC2154
+info "__base: ${__base}"
+info "OSTYPE: ${OSTYPE}"
+
+info "arg_f: ${arg_f}"
+info "arg_d: ${arg_d}"
+info "arg_v: ${arg_v}"
+info "arg_h: ${arg_h}"
+if [[ -n "${arg_i:-}" ]]; then
+  info "arg_i: ${#arg_i[@]}"
+  for input_file in "${arg_i[@]}"; do
+    info " - ${input_file}"
+  done
+else
+  info "arg_i: 0"
+fi
+# shellcheck disable=SC2015
+[[ -n "${arg_x:-}" ]] && info "arg_x: ${#arg_x[@]}" || info "arg_x: 0"
+
+info "$(echo -e "multiple lines example - line #1\\nmultiple lines example - line #2\\nimagine logging the output of 'ls -al /path/'")"
+
+# All of these go to STDERR, so you can use STDOUT for piping machine readable information to other software
+debug "Info useful to developers for debugging the application, not useful during operations."
+info "Normal operational messages - may be harvested for reporting, measuring throughput, etc. - no action required."
+notice "Events that are unusual but not error conditions - might be summarized in an email to developers or admins to spot potential problems - no immediate action required."
+warning "Warning messages, not an error, but indication that an error will occur if action is not taken, e.g. file system 85% full - each item must be resolved within a given time."
+error "Non-urgent failures, these should be relayed to developers or admins; each item must be resolved within a given time."
+critical "Should be corrected immediately, but indicates failure in a primary system, an example is a loss of a backup ISP connection."
+alert "Should be corrected immediately, therefore notify staff who can fix the problem. An example would be the loss of a primary ISP connection."
+emergency "A \"panic\" condition usually affecting multiple apps/servers/sites. At this level it would usually notify all tech staff on call."

main.sh

@@ -1,244 +1,452 @@
 #!/usr/bin/env bash
-# BASH3 Boilerplate
-#
 # This file:
-#  - Is a template to write better bash scripts
-#  - Is delete-key friendly, in case you don't need e.g. command line option parsing
 #
-# More info:
-#  - https://github.com/kvz/bash3boilerplate
-#  - http://kvz.io/blog/2013/02/26/introducing-bash3boilerplate/
-#
-# Version 1.2.0
-#
-# Authors:
-#  - Kevin van Zonneveld (http://kvz.io)
-#  - Izaak Beekman (https://izaakbeekman.com/)
-#  - Alexander Rathai (Alexander.Rathai@gmail.com)
+#  - Demos BASH3 Boilerplate (change this for your script)
 #
 # Usage:
-#  LOG_LEVEL=7 ./main.sh -f /tmp/x -d
 #
-# Licensed under MIT
-# Copyright (c) 2013 Kevin van Zonneveld (http://kvz.io)
+#  LOG_LEVEL=7 ./main.sh -f /tmp/x -d (change this for your script)
+#
+# Based on a template by BASH3 Boilerplate vv2.7.2
+# http://bash3boilerplate.sh/#authors
+#
+# The MIT License (MIT)
+# Copyright (c) 2013 Kevin van Zonneveld and contributors
+# You are not obligated to bundle the LICENSE file with your b3bp projects as long
+# as you leave these references intact in the header comments of your source files.
 
-
-### Configuration
-#####################################################################
-
-# Exit on error. Append ||true if you expect an error.
-# `set` is safer than relying on a shebang like `#!/bin/bash -e` because that is neutralized
-# when someone runs your script as `bash yourscript.sh`
+# Exit on error. Append "|| true" if you expect an error.
 set -o errexit
+# Exit on error inside any functions or subshells.
+set -o errtrace
+# Do not allow use of undefined vars. Use ${VAR:-} to use an undefined VAR
 set -o nounset
-
-# Bash will remember & return the highest exitcode in a chain of pipes.
-# This way you can catch the error in case mysqldump fails in `mysqldump |gzip`
+# Catch the error in case mysqldump fails (but gzip succeeds) in `mysqldump |gzip`
 set -o pipefail
+# Turn on traces, useful while debugging but commented out by default
 # set -o xtrace
 
-# Environment variables and their defaults
+if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
+  __i_am_main_script="0" # false
+
+  if [[ "${__usage+x}" ]]; then
+    if [[ "${BASH_SOURCE[1]}" = "${0}" ]]; then
+      __i_am_main_script="1" # true
+    fi
+
+    __b3bp_external_usage="true"
+    __b3bp_tmp_source_idx=1
+  fi
+else
+  __i_am_main_script="1" # true
+  [[ "${__usage+x}" ]] && unset -v __usage
+  [[ "${__helptext+x}" ]] && unset -v __helptext
+fi
+
+# Set magic variables for current file, directory, os, etc.
+__dir="$(cd "$(dirname "${BASH_SOURCE[${__b3bp_tmp_source_idx:-0}]}")" && pwd)"
+__file="${__dir}/$(basename "${BASH_SOURCE[${__b3bp_tmp_source_idx:-0}]}")"
+__base="$(basename "${__file}" .sh)"
+# shellcheck disable=SC2034,SC2015
+__invocation="$(printf %q "${__file}")$( (($#)) && printf ' %q' "$@" || true)"
+
+# Define the environment variables (and their defaults) that this script depends on
 LOG_LEVEL="${LOG_LEVEL:-6}" # 7 = debug -> 0 = emergency
 NO_COLOR="${NO_COLOR:-}"    # true = disable color. otherwise autodetected
 
+
+### Functions
+##############################################################################
+
+function __b3bp_log () {
+  local log_level="${1}"
+  shift
+
+  # shellcheck disable=SC2034
+  local color_debug="\\x1b[35m"
+  # shellcheck disable=SC2034
+  local color_info="\\x1b[32m"
+  # shellcheck disable=SC2034
+  local color_notice="\\x1b[34m"
+  # shellcheck disable=SC2034
+  local color_warning="\\x1b[33m"
+  # shellcheck disable=SC2034
+  local color_error="\\x1b[31m"
+  # shellcheck disable=SC2034
+  local color_critical="\\x1b[1;31m"
+  # shellcheck disable=SC2034
+  local color_alert="\\x1b[1;37;41m"
+  # shellcheck disable=SC2034
+  local color_emergency="\\x1b[1;4;5;37;41m"
+
+  local colorvar="color_${log_level}"
+
+  local color="${!colorvar:-${color_error}}"
+  local color_reset="\\x1b[0m"
+
+  if [[ "${NO_COLOR:-}" = "true" ]] || { [[ "${TERM:-}" != "xterm"* ]] && [[ "${TERM:-}" != "screen"* ]]; } || [[ ! -t 2 ]]; then
+    if [[ "${NO_COLOR:-}" != "false" ]]; then
+      # Don't use colors on pipes or non-recognized terminals
+      color=""; color_reset=""
+    fi
+  fi
+
+  # all remaining arguments are to be printed
+  local log_line=""
+
+  while IFS=$'\n' read -r log_line; do
+    echo -e "$(date -u +"%Y-%m-%d %H:%M:%S UTC") ${color}$(printf "[%9s]" "${log_level}")${color_reset} ${log_line}" 1>&2
+  done <<< "${@:-}"
+}
+
+function emergency () {                                __b3bp_log emergency "${@}"; exit 1; }
+function alert ()     { [[ "${LOG_LEVEL:-0}" -ge 1 ]] && __b3bp_log alert "${@}"; true; }
+function critical ()  { [[ "${LOG_LEVEL:-0}" -ge 2 ]] && __b3bp_log critical "${@}"; true; }
+function error ()     { [[ "${LOG_LEVEL:-0}" -ge 3 ]] && __b3bp_log error "${@}"; true; }
+function warning ()   { [[ "${LOG_LEVEL:-0}" -ge 4 ]] && __b3bp_log warning "${@}"; true; }
+function notice ()    { [[ "${LOG_LEVEL:-0}" -ge 5 ]] && __b3bp_log notice "${@}"; true; }
+function info ()      { [[ "${LOG_LEVEL:-0}" -ge 6 ]] && __b3bp_log info "${@}"; true; }
+function debug ()     { [[ "${LOG_LEVEL:-0}" -ge 7 ]] && __b3bp_log debug "${@}"; true; }
+
+function help () {
+  echo "" 1>&2
+  echo " ${*}" 1>&2
+  echo "" 1>&2
+  echo "  ${__usage:-No usage available}" 1>&2
+  echo "" 1>&2
+
+  if [[ "${__helptext:-}" ]]; then
+    echo " ${__helptext}" 1>&2
+    echo "" 1>&2
+  fi
+
+  exit 1
+}
+
+
+### Parse commandline options
+##############################################################################
+
 # Commandline options. This defines the usage page, and is used to parse cli
 # opts & defaults from. The parsing is unforgiving so be precise in your syntax
 # - A short option must be preset for every long option; but every short option
 #   need not have a long option
 # - `--` is respected as the separator between options and arguments
-read -r -d '' usage <<-'EOF' || true # exits non-zero when EOF encountered
+# - We do not bash-expand defaults, so setting '~/app' as a default will not resolve to ${HOME}.
+#   you can use bash variables to work around this (so use ${HOME} instead)
+
+# shellcheck disable=SC2015
+[[ "${__usage+x}" ]] || read -r -d '' __usage <<-'EOF' || true # exits non-zero when EOF encountered
   -f --file  [arg] Filename to process. Required.
   -t --temp  [arg] Location of tempfile. Default="/tmp/bar"
   -v               Enable verbose mode, print script as it is executed
   -d --debug       Enables debug mode
   -h --help        This page
+  -n --no-color    Disable color output
+  -1 --one         Do just one thing
+  -i --input [arg] File to process. Can be repeated.
+  -x               Specify a flag. Can be repeated.
 EOF
 
-# Set magic variables for current file and its directory.
-# BASH_SOURCE[0] is used so we can display the current file even if it is sourced by a parent script.
-# If you need the script that was executed, consider using $0 instead.
-__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
-__base="$(basename ${__file} .sh)"
-__os="Linux"
-if [[ "${OSTYPE:-}" == "darwin"* ]]; then
-  __os="OSX"
-fi
-
-### Functions
-#####################################################################
-
-function _fmt ()      {
-  local color_debug="\x1b[35m"
-  local color_info="\x1b[32m"
-  local color_notice="\x1b[34m"
-  local color_warning="\x1b[33m"
-  local color_error="\x1b[31m"
-  local color_critical="\x1b[1;31m"
-  local color_alert="\x1b[1;33;41m"
-  local color_emergency="\x1b[1;4;5;33;41m"
-  local colorvar=color_$1
-
-  local color="${!colorvar:-$color_error}"
-  local color_reset="\x1b[0m"
-  if [ "${NO_COLOR}" = "true" ] || [[ "${TERM:-}" != "xterm"* ]] || [ -t 1 ]; then
-    # Don't use colors on pipes or non-recognized terminals
-    color=""; color_reset=""
-  fi
-  echo -e "$(date -u +"%Y-%m-%d %H:%M:%S UTC") ${color}$(printf "[%9s]" ${1})${color_reset}";
-}
-function emergency () {                             echo "$(_fmt emergency) ${@}" 1>&2 || true; exit 1; }
-function alert ()     { [ "${LOG_LEVEL}" -ge 1 ] && echo "$(_fmt alert) ${@}" 1>&2 || true; }
-function critical ()  { [ "${LOG_LEVEL}" -ge 2 ] && echo "$(_fmt critical) ${@}" 1>&2 || true; }
-function error ()     { [ "${LOG_LEVEL}" -ge 3 ] && echo "$(_fmt error) ${@}" 1>&2 || true; }
-function warning ()   { [ "${LOG_LEVEL}" -ge 4 ] && echo "$(_fmt warning) ${@}" 1>&2 || true; }
-function notice ()    { [ "${LOG_LEVEL}" -ge 5 ] && echo "$(_fmt notice) ${@}" 1>&2 || true; }
-function info ()      { [ "${LOG_LEVEL}" -ge 6 ] && echo "$(_fmt info) ${@}" 1>&2 || true; }
-function debug ()     { [ "${LOG_LEVEL}" -ge 7 ] && echo "$(_fmt debug) ${@}" 1>&2 || true; }
-
-function help () {
-  echo "" 1>&2
-  echo " ${@}" 1>&2
-  echo "" 1>&2
-  echo "  ${usage}" 1>&2
-  echo "" 1>&2
-  exit 1
-}
-
-function cleanup_before_exit () {
-  info "Cleaning up. Done"
-}
-trap cleanup_before_exit EXIT
-
-
-### Parse commandline options
-#####################################################################
+# shellcheck disable=SC2015
+[[ "${__helptext+x}" ]] || read -r -d '' __helptext <<-'EOF' || true # exits non-zero when EOF encountered
+ This is Bash3 Boilerplate's help text. Feel free to add any description of your
+ program or elaborate more on command-line arguments. This section is not
+ parsed and will be added as-is to the help.
+EOF
 
 # Translate usage string -> getopts arguments, and set $arg_<flag> defaults
-while read line; do
-  # fetch single character version of option sting
-  opt="$(echo "${line}" |awk '{print $1}' |sed -e 's#^-##')"
+while read -r __b3bp_tmp_line; do
+  if [[ "${__b3bp_tmp_line}" =~ ^- ]]; then
+    # fetch single character version of option string
+    __b3bp_tmp_opt="${__b3bp_tmp_line%% *}"
+    __b3bp_tmp_opt="${__b3bp_tmp_opt:1}"
 
-  # fetch long version if present
-  long_opt="$(echo "${line}" |awk '/\-\-/ {print $2}' |sed -e 's#^--##')"
+    # fetch long version if present
+    __b3bp_tmp_long_opt=""
 
-  # map long name back to short name
-  varname="short_opt_${long_opt}"
-  eval "${varname}=\"${opt}\""
-
-  # check if option takes an argument
-  varname="has_arg_${opt}"
-  if ! echo "${line}" |egrep '\[.*\]' >/dev/null 2>&1; then
-    init="0" # it's a flag. init with 0
-    eval "${varname}=0"
-  else
-    opt="${opt}:" # add : if opt has arg
-    init=""  # it has an arg. init with ""
-    eval "${varname}=1"
-  fi
-  opts="${opts:-}${opt}"
-
-  varname="arg_${opt:0:1}"
-  if ! echo "${line}" |egrep '\. Default=' >/dev/null 2>&1; then
-    eval "${varname}=\"${init}\""
-  else
-    match="$(echo "${line}" |sed 's#^.*Default=\(\)#\1#g')"
-    eval "${varname}=\"${match}\""
-  fi
-done <<< "${usage}"
-
-# Allow long options like --this
-opts="${opts}-:"
-
-# Reset in case getopts has been used previously in the shell.
-OPTIND=1
-
-# Overwrite $arg_<flag> defaults with the actual CLI options
-while getopts "${opts}" opt; do
-  [ "${opt}" = "?" ] && help "Invalid use of script: ${@} "
-
-  if [ "${opt}" = "-" ]; then
-    # OPTARG is long-option-name or long-option=value
-    if [[ "${OPTARG}" =~ .*=.* ]]; then
-      # --key=value format
-      long=${OPTARG/=*/}
-      # Set opt to the short option corresponding to the long option
-      eval "opt=\"\${short_opt_${long}}\""
-      OPTARG=${OPTARG#*=}
-    else
-      # --key value format
-      # Map long name to short version of option
-      eval "opt=\"\${short_opt_${OPTARG}}\""
-      # Only assign OPTARG if option takes an argument
-      eval "OPTARG=\"\${@:OPTIND:\${has_arg_${opt}}}\""
-      # shift over the argument if argument is expected
-      ((OPTIND+=has_arg_${opt}))
+    if [[ "${__b3bp_tmp_line}" = *"--"* ]]; then
+      __b3bp_tmp_long_opt="${__b3bp_tmp_line#*--}"
+      __b3bp_tmp_long_opt="${__b3bp_tmp_long_opt%% *}"
     fi
-    # we have set opt/OPTARG to the short value and the argument as OPTARG if it exists
-  fi
-  varname="arg_${opt:0:1}"
-  default="${!varname}"
 
-  value="${OPTARG:-}"
-  if [ -z "${OPTARG:-}" ] && [ "${default}" = "0" ]; then
-    value="1"
+    # map opt long name to+from opt short name
+    printf -v "__b3bp_tmp_opt_long2short_${__b3bp_tmp_long_opt//-/_}" '%s' "${__b3bp_tmp_opt}"
+    printf -v "__b3bp_tmp_opt_short2long_${__b3bp_tmp_opt}" '%s' "${__b3bp_tmp_long_opt//-/_}"
+
+    # check if option takes an argument
+    if [[ "${__b3bp_tmp_line}" =~ \[.*\] ]]; then
+      __b3bp_tmp_opt="${__b3bp_tmp_opt}:" # add : if opt has arg
+      __b3bp_tmp_init=""  # it has an arg. init with ""
+      printf -v "__b3bp_tmp_has_arg_${__b3bp_tmp_opt:0:1}" '%s' "1"
+    elif [[ "${__b3bp_tmp_line}" =~ \{.*\} ]]; then
+      __b3bp_tmp_opt="${__b3bp_tmp_opt}:" # add : if opt has arg
+      __b3bp_tmp_init=""  # it has an arg. init with ""
+      # remember that this option requires an argument
+      printf -v "__b3bp_tmp_has_arg_${__b3bp_tmp_opt:0:1}" '%s' "2"
+    else
+      __b3bp_tmp_init="0" # it's a flag. init with 0
+      printf -v "__b3bp_tmp_has_arg_${__b3bp_tmp_opt:0:1}" '%s' "0"
+    fi
+    __b3bp_tmp_opts="${__b3bp_tmp_opts:-}${__b3bp_tmp_opt}"
+
+    if [[ "${__b3bp_tmp_line}" =~ ^Can\ be\ repeated\. ]] || [[ "${__b3bp_tmp_line}" =~ \.\ *Can\ be\ repeated\. ]]; then
+      # remember that this option can be repeated
+      printf -v "__b3bp_tmp_is_array_${__b3bp_tmp_opt:0:1}" '%s' "1"
+    else
+      printf -v "__b3bp_tmp_is_array_${__b3bp_tmp_opt:0:1}" '%s' "0"
+    fi
   fi
 
-  eval "${varname}=\"${value}\""
-  debug "cli arg ${varname} = ($default) -> ${!varname}"
+  [[ "${__b3bp_tmp_opt:-}" ]] || continue
+
+  if [[ "${__b3bp_tmp_line}" =~ ^Default= ]] || [[ "${__b3bp_tmp_line}" =~ \.\ *Default= ]]; then
+    # ignore default value if option does not have an argument
+    __b3bp_tmp_varname="__b3bp_tmp_has_arg_${__b3bp_tmp_opt:0:1}"
+    if [[ "${!__b3bp_tmp_varname}" != "0" ]]; then
+      # take default
+      __b3bp_tmp_init="${__b3bp_tmp_line##*Default=}"
+      # strip double quotes from default argument
+      __b3bp_tmp_re='^"(.*)"$'
+      if [[ "${__b3bp_tmp_init}" =~ ${__b3bp_tmp_re} ]]; then
+        __b3bp_tmp_init="${BASH_REMATCH[1]}"
+      else
+        # strip single quotes from default argument
+        __b3bp_tmp_re="^'(.*)'$"
+        if [[ "${__b3bp_tmp_init}" =~ ${__b3bp_tmp_re} ]]; then
+          __b3bp_tmp_init="${BASH_REMATCH[1]}"
+        fi
+      fi
+    fi
+  fi
+
+  if [[ "${__b3bp_tmp_line}" =~ ^Required\. ]] || [[ "${__b3bp_tmp_line}" =~ \.\ *Required\. ]]; then
+    # remember that this option requires an argument
+    printf -v "__b3bp_tmp_has_arg_${__b3bp_tmp_opt:0:1}" '%s' "2"
+  fi
+
+  # Init var with value unless it is an array / a repeatable
+  __b3bp_tmp_varname="__b3bp_tmp_is_array_${__b3bp_tmp_opt:0:1}"
+  [[ "${!__b3bp_tmp_varname}" = "0" ]] && printf -v "arg_${__b3bp_tmp_opt:0:1}" '%s' "${__b3bp_tmp_init}"
+done <<< "${__usage:-}"
+
+# run getopts only if options were specified in __usage
+if [[ "${__b3bp_tmp_opts:-}" ]]; then
+  # Allow long options like --this
+  __b3bp_tmp_opts="${__b3bp_tmp_opts}-:"
+
+  # Reset in case getopts has been used previously in the shell.
+  OPTIND=1
+
+  # start parsing command line
+  set +o nounset # unexpected arguments will cause unbound variables
+                 # to be dereferenced
+  # Overwrite $arg_<flag> defaults with the actual CLI options
+  while getopts "${__b3bp_tmp_opts}" __b3bp_tmp_opt; do
+    [[ "${__b3bp_tmp_opt}" = "?" ]] && help "Invalid use of script: ${*} "
+
+    if [[ "${__b3bp_tmp_opt}" = "-" ]]; then
+      # OPTARG is long-option-name or long-option=value
+      if [[ "${OPTARG}" =~ .*=.* ]]; then
+        # --key=value format
+        __b3bp_tmp_long_opt=${OPTARG/=*/}
+        # Set opt to the short option corresponding to the long option
+        __b3bp_tmp_varname="__b3bp_tmp_opt_long2short_${__b3bp_tmp_long_opt//-/_}"
+        printf -v "__b3bp_tmp_opt" '%s' "${!__b3bp_tmp_varname}"
+        OPTARG=${OPTARG#*=}
+      else
+        # --key value format
+        # Map long name to short version of option
+        __b3bp_tmp_varname="__b3bp_tmp_opt_long2short_${OPTARG//-/_}"
+        printf -v "__b3bp_tmp_opt" '%s' "${!__b3bp_tmp_varname}"
+        # Only assign OPTARG if option takes an argument
+        __b3bp_tmp_varname="__b3bp_tmp_has_arg_${__b3bp_tmp_opt}"
+        __b3bp_tmp_varvalue="${!__b3bp_tmp_varname}"
+        [[ "${__b3bp_tmp_varvalue}" != "0" ]] && __b3bp_tmp_varvalue="1"
+        printf -v "OPTARG" '%s' "${@:OPTIND:${__b3bp_tmp_varvalue}}"
+        # shift over the argument if argument is expected
+        ((OPTIND+=__b3bp_tmp_varvalue))
+      fi
+      # we have set opt/OPTARG to the short value and the argument as OPTARG if it exists
+    fi
+
+    __b3bp_tmp_value="${OPTARG}"
+
+    __b3bp_tmp_varname="__b3bp_tmp_is_array_${__b3bp_tmp_opt:0:1}"
+    if [[ "${!__b3bp_tmp_varname}" != "0" ]]; then
+      # repeatables
+      # shellcheck disable=SC2016
+      if [[ -z "${OPTARG}" ]]; then
+        # repeatable flags, they increcemnt
+        __b3bp_tmp_varname="arg_${__b3bp_tmp_opt:0:1}"
+        debug "cli arg ${__b3bp_tmp_varname} = (${__b3bp_tmp_default}) -> ${!__b3bp_tmp_varname}"
+          # shellcheck disable=SC2004
+        __b3bp_tmp_value=$((${!__b3bp_tmp_varname} + 1))
+        printf -v "${__b3bp_tmp_varname}" '%s' "${__b3bp_tmp_value}"
+      else
+        # repeatable args, they get appended to an array
+        __b3bp_tmp_varname="arg_${__b3bp_tmp_opt:0:1}[@]"
+        debug "cli arg ${__b3bp_tmp_varname} append ${__b3bp_tmp_value}"
+        declare -a "${__b3bp_tmp_varname}"='("${!__b3bp_tmp_varname}" "${__b3bp_tmp_value}")'
+      fi
+    else
+      # non-repeatables
+      __b3bp_tmp_varname="arg_${__b3bp_tmp_opt:0:1}"
+      __b3bp_tmp_default="${!__b3bp_tmp_varname}"
+
+      if [[ -z "${OPTARG}" ]]; then
+        __b3bp_tmp_value=$((__b3bp_tmp_default + 1))
+      fi
+
+      printf -v "${__b3bp_tmp_varname}" '%s' "${__b3bp_tmp_value}"
+
+      debug "cli arg ${__b3bp_tmp_varname} = (${__b3bp_tmp_default}) -> ${!__b3bp_tmp_varname}"
+    fi
+  done
+  set -o nounset # no more unbound variable references expected
+
+  shift $((OPTIND-1))
+
+  if [[ "${1:-}" = "--" ]] ; then
+    shift
+  fi
+fi
+
+
+### Automatic validation of required option arguments
+##############################################################################
+
+for __b3bp_tmp_varname in ${!__b3bp_tmp_has_arg_*}; do
+  # validate only options which required an argument
+  [[ "${!__b3bp_tmp_varname}" = "2" ]] || continue
+
+  __b3bp_tmp_opt_short="${__b3bp_tmp_varname##*_}"
+  __b3bp_tmp_varname="arg_${__b3bp_tmp_opt_short}"
+  [[ "${!__b3bp_tmp_varname}" ]] && continue
+
+  __b3bp_tmp_varname="__b3bp_tmp_opt_short2long_${__b3bp_tmp_opt_short}"
+  printf -v "__b3bp_tmp_opt_long" '%s' "${!__b3bp_tmp_varname}"
+  [[ "${__b3bp_tmp_opt_long:-}" ]] && __b3bp_tmp_opt_long=" (--${__b3bp_tmp_opt_long//_/-})"
+
+  help "Option -${__b3bp_tmp_opt_short}${__b3bp_tmp_opt_long:-} requires an argument"
 done
 
-shift $((OPTIND-1))
 
-[ "${1:-}" = "--" ] && shift
+### Cleanup Environment variables
+##############################################################################
+
+for __tmp_varname in ${!__b3bp_tmp_*}; do
+  unset -v "${__tmp_varname}"
+done
+
+unset -v __tmp_varname
 
 
-### Switches (like -d for debugmode, -h for showing helppage)
-#####################################################################
+### Externally supplied __usage. Nothing else to do here
+##############################################################################
+
+if [[ "${__b3bp_external_usage:-}" = "true" ]]; then
+  unset -v __b3bp_external_usage
+  return
+fi
+
+
+### Signal trapping and backtracing
+##############################################################################
+
+function __b3bp_cleanup_before_exit () {
+  info "Cleaning up. Done"
+}
+trap __b3bp_cleanup_before_exit EXIT
+
+# requires `set -o errtrace`
+__b3bp_err_report() {
+    local error_code=${?}
+    error "Error in ${__file} in function ${1} on line ${2}"
+    exit ${error_code}
+}
+# Uncomment the following line for always providing an error backtrace
+# trap '__b3bp_err_report "${FUNCNAME:-.}" ${LINENO}' ERR
+
+
+### Command-line argument switches (like -d for debugmode, -h for showing helppage)
+##############################################################################
 
 # debug mode
-if [ "${arg_d}" = "1" ]; then
+if [[ "${arg_d:?}" = "1" ]]; then
   set -o xtrace
+  PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
   LOG_LEVEL="7"
+  # Enable error backtracing
+  trap '__b3bp_err_report "${FUNCNAME:-.}" ${LINENO}' ERR
 fi
 
 # verbose mode
-if [ "${arg_v}" = "1" ]; then
+if [[ "${arg_v:?}" = "1" ]]; then
   set -o verbose
 fi
 
+# no color mode
+if [[ "${arg_n:?}" = "1" ]]; then
+  NO_COLOR="true"
+fi
+
 # help mode
-if [ "${arg_h}" = "1" ]; then
+if [[ "${arg_h:?}" = "1" ]]; then
   # Help exists with code 1
   help "Help using ${0}"
 fi
 
 
-### Validation (decide what's required for running your script and error out)
-#####################################################################
+### Validation. Error out if the things required for your script are not present
+##############################################################################
 
-[ -z "${arg_f:-}" ]     && help      "Setting a filename with -f or --file is required"
-[ -z "${LOG_LEVEL:-}" ] && emergency "Cannot continue without LOG_LEVEL. "
+[[ "${arg_f:-}" ]]     || help      "Setting a filename with -f or --file is required"
+[[ "${LOG_LEVEL:-}" ]] || emergency "Cannot continue without LOG_LEVEL. "
 
 
 ### Runtime
-#####################################################################
+##############################################################################
 
+info "__i_am_main_script: ${__i_am_main_script}"
 info "__file: ${__file}"
 info "__dir: ${__dir}"
 info "__base: ${__base}"
-info "__os: ${__os}"
+info "OSTYPE: ${OSTYPE}"
 
 info "arg_f: ${arg_f}"
 info "arg_d: ${arg_d}"
 info "arg_v: ${arg_v}"
 info "arg_h: ${arg_h}"
 
+# shellcheck disable=SC2015
+if [[ -n "${arg_i:-}" ]] && declare -p arg_i 2> /dev/null | grep -q '^declare \-a'; then
+  info "arg_i:"
+  for input_file in "${arg_i[@]}"; do
+    info " - ${input_file}"
+  done
+elif [[ -n "${arg_i:-}" ]]; then
+  info "arg_i: ${arg_i}"
+else
+  info "arg_i: 0"
+fi
+
+# shellcheck disable=SC2015
+if [[ -n "${arg_x:-}" ]] && declare -p arg_x 2> /dev/null | grep -q '^declare \-a'; then
+  info "arg_x: ${#arg_x[@]}"
+elif [[ -n "${arg_x:-}" ]]; then
+  info "arg_x: ${arg_x}"
+else
+  info "arg_x: 0"
+fi
+
+info "$(echo -e "multiple lines example - line #1\\nmultiple lines example - line #2\\nimagine logging the output of 'ls -al /path/'")"
+
 # All of these go to STDERR, so you can use STDOUT for piping machine readable information to other software
 debug "Info useful to developers for debugging the application, not useful during operations."
 info "Normal operational messages - may be harvested for reporting, measuring throughput, etc. - no action required."
 notice "Events that are unusual but not error conditions - might be summarized in an email to developers or admins to spot potential problems - no immediate action required."
-warning "Warning messages, not an error, but indication that an error will occur if action is not taken, e.g. file system 85% full - each item must be resolved within a given time. This is a debug message"
+warning "Warning messages, not an error, but indication that an error will occur if action is not taken, e.g. file system 85% full - each item must be resolved within a given time."
 error "Non-urgent failures, these should be relayed to developers or admins; each item must be resolved within a given time."
 critical "Should be corrected immediately, but indicates failure in a primary system, an example is a loss of a backup ISP connection."
 alert "Should be corrected immediately, therefore notify staff who can fix the problem. An example would be the loss of a primary ISP connection."

package.json

@@ -1,19 +1,29 @@
 {
   "name": "bash3boilerplate",
   "description": "Copypastable templates to write better bash scripts",
-  "version": "1.2.0",
-  "scripts": {
-    "release:major": "env SEMANTIC=major npm run release",
-    "release:minor": "env SEMANTIC=minor npm run release",
-    "release:patch": "env SEMANTIC=patch npm run release",
-    "test": "test/acceptance.sh",
-    "save:fixtures": "cross-env SAVE_FIXTURES=true npm run test",
-    "release": "npm version ${SEMANTIC:-patch} -m \"Release %s\" && git push --tags && npm publish"
+  "version": "2.7.2",
+  "packageManager": "yarn@3.6.0+sha224.19e47520fa56c6146388fdeb438d9dcf6630c3f277a2e1180995c3bb",
+  "engines": {
+    "node": ">= 18",
+    "yarn": "3.6.0"
   },
-  "dependencies": {
-    "fakefile": "0.0.6"
+  "scripts": {
+    "lint:shellcheck": "shellcheck --severity=${SHELLCHECK_SEVERITY:-info} $(find . -name '*.sh' -maxdepth 2)",
+    "lint:style": "test/style.pl $(find . -name '*.sh' -maxdepth 2)",
+    "lint": "npm-run-all -l 'lint:**'",
+    "release:major": "env SEMANTIC=major yarn release",
+    "release:minor": "env SEMANTIC=minor yarn release",
+    "release:patch": "env SEMANTIC=patch yarn release",
+    "release": "npm version ${SEMANTIC:-patch} -m \"Release %s\" && yarn version:replace && git commit main.sh src/*.sh -m 'Update version' && git push && git push --tags -f && npm publish",
+    "test:debug:main:repeated": "env LOG_LEVEL=7 test/acceptance.sh main-repeated",
+    "test:update": "env SAVE_FIXTURES=true yarn test",
+    "test": "test/acceptance.sh",
+    "version:current": "node -e 'console.log(require(\"./package.json\").version)'",
+    "version:replace": "replace 'v\\d+\\.\\d+\\.\\d+' \"v$(npm run --silent version:current)\" main.sh src/*.sh"
   },
   "devDependencies": {
-    "cross-env": "1.0.7"
+    "fakefile": "1.1.0",
+    "npm-run-all": "4.1.5",
+    "replace": "1.2.2"
   }
 }

src/bump.sh

@@ -1,131 +0,0 @@
-#!/usr/bin/env bash
-# Copyright (c) 2014, Transloadit Ltd.
-#
-# This file:
-#
-#  - Bumps a semantic version as specified in first argument
-#  - Or: Bumps a semantic version in a file as specified in first argument
-#  - Returns the version if no levelName is provided in second argument
-#  - Only supports Go files ending in 'var Version = ...'
-#
-# Run as:
-#
-#  ./bump.sh 0.0.1 patch
-#  ./bump.sh ./VERSION patch
-#  ./bump.sh ./VERSION patch
-#  ./bump.sh ./VERSION major 1
-#  ./bump.sh ./version.go patch 2
-#
-# Returns:
-#
-# v0.0.1
-#
-# Requires:
-#
-#  - gsed on OSX (brew install gnu-sed)
-#
-# Authors:
-#
-#  - Kevin van Zonneveld <kevin@transloadit.com>
-
-set -o pipefail
-set -o errexit
-set -o nounset
-# set -o xtrace
-
-# Set magic variables for current FILE & DIR
-__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-__root="$(cd "$(dirname "${__dir}")" && pwd)"
-__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
-__base="$(basename ${__file} .sh)"
-
-gsed=""
-[ -n "$(which sed)" ]  && gsed="$(which sed)"
-[ -n "$(which gsed)" ] && gsed="$(which gsed)"
-
-
-. ${__dir}/semver.sh
-
-function readFromFile() {
-  local filepath="${1}"
-  local extension="${filepath##*.}"
-
-  if [ "${extension}" = "go" ]; then
-    curVersion="$(awk -F'"' '/^var Version = / {print $2}' "${filepath}" | tail -n1)" || true
-  else
-    curVersion="$(echo $(cat "${filepath}"))" || true
-  fi
-
-  if [ -z "${curVersion}" ]; then
-    curVersion="v0.0.0"
-  fi
-
-  echo "${curVersion}"
-}
-
-function writeToFile() {
-  local filepath="${1}"
-  local newVersion="${2}"
-  local extension="${filepath##*.}"
-
-  if [ "${extension}" = "go" ]; then
-    buf="$(cat "${filepath}" |egrep -v '^var Version = ')" || true
-    echo -e "${buf}\nvar Version = \"${newVersion}\"" > "${filepath}"
-  else
-    echo "${newVersion}" > "${filepath}"
-  fi
-}
-
-function bump() {
-  local version="${1}"
-  local levelName="${2}"
-  local bump="${3}"
-
-  local major=0
-  local minor=0
-  local patch=0
-  local special=""
-
-  local newVersion=""
-
-  semverParseInto "${version}" major minor patch special
-
-  if [ "${levelName}" = "major" ]; then
-    let "major = major + ${bump}"
-    minor=0
-    patch=0
-    special=""
-  fi
-  if [ "${levelName}" = "minor" ]; then
-    let "minor = minor + ${bump}"
-    patch=0
-    special=""
-  fi
-  if [ "${levelName}" = "patch" ]; then
-    let "patch = patch + ${bump}"
-    special=""
-  fi
-  if [ "${levelName}" = "special" ]; then
-    special="${bump}"
-  fi
-
-  newVersion="v${major}.${minor}.${patch}"
-  if [ -n "${special}" ]; then
-    newVersion=".${newVersion}"
-  fi
-  echo "${newVersion}"
-}
-
-if [ -f "${1}" ]; then
-  filepath="${1}"
-  curVersion="$(readFromFile "${filepath}")"
-else
-  curVersion="${1}"
-fi
-
-newVersion=$(bump "${curVersion}" "${2:-}" "${3:-1}")
-echo "${newVersion}"
-
-if [ -n "${filepath:-}" ]; then
-  writeToFile "${filepath}" "${newVersion}"
-fi

src/ini_val.sh

@@ -1,38 +1,113 @@
 #!/usr/bin/env bash
+# BASH3 Boilerplate: ini_val
+#
+# This file:
+#
+#  - Can read and write .ini files using pure bash
+#
+# Limitations:
+#
+#  - All keys inside a section of the .ini file must be unique
+#  - Optional comment parameter for the creation of new entries
+#
+# Usage as a function:
+#
+#  source ini_val.sh
+#  ini_val data.ini connection.host 127.0.0.1 "Host name or IP address"
+#
+# Usage as a command:
+#
+#  ini_val.sh data.ini connection.host 127.0.0.1 "Host name or IP address"
+#
+# Based on a template by BASH3 Boilerplate vv2.7.2
+# http://bash3boilerplate.sh/#authors
+#
+# The MIT License (MIT)
+# Copyright (c) 2013 Kevin van Zonneveld and contributors
+# You are not obligated to bundle the LICENSE file with your b3bp projects as long
+# as you leave these references intact in the header comments of your source files.
+
 function ini_val() {
-  local file="${1}"
-  local sectionkey="${2}"
-  local val="${3}"
-  local delim=" = "
+  local file="${1:-}"
+  local sectionkey="${2:-}"
+  local val="${3:-}"
+  local comment="${4:-}"
+  local delim="="
+  local comment_delim=";"
   local section=""
   local key=""
+  local current=""
+  # add default section
+  local section_default="default"
 
-  # Split on . for section. However, section is optional
-  read section key <<<$(IFS="."; echo ${sectionkey})
-  if [ -z "${key}" ]; then
-    key="${section}"
-    section=""
+  if [[ ! -f "${file}" ]]; then
+    # touch file if not exists
+    touch "${file}"
   fi
 
-  local current=$(awk -F"${delim}" "/^${key}${delim}/ {for (i=2; i<NF; i++) printf \$i \" \"; print \$NF}" "${file}")
-  if [ -z "${val}" ]; then
+  # Split on . for section. However, section is optional
+  IFS='.' read -r section key <<< "${sectionkey}"
+  if [[ ! "${key}" ]]; then
+    key="${section}"
+    # default section if not given
+    section="${section_default}"
+  fi
+
+  # get current value (if exists)
+  current=$(sed -En "/^\[/{h;d;};G;s/^${key}([[:blank:]]*)${delim}(.*)\n\[${section}\]$/\2/p" "${file}"|awk '{$1=$1};1')
+  # get current comment (if exists)
+  current_comment=$(sed -En "/^\[${section}\]/,/^\[.*\]/ s|^(${comment_delim}\[${key}\])(.*)|\2|p" "${file}"|awk '{$1=$1};1')
+
+  if ! grep -q "\[${section}\]" "${file}"; then
+    # create section if not exists (empty line to seperate new section for better readability)
+    echo  >> "${file}"
+    echo "[${section}]" >> "${file}"
+  fi
+
+  if [[ ! "${val}" ]]; then
     # get a value
     echo "${current}"
   else
     # set a value
-    if [ -z "${current}" ]; then
-      # doesn't exist yet, add
-
-      if [ -z "${section}" ]; then
-        # no section was given, add to bottom of file
-        echo "${key}${delim}${val}" >> "${file}"
-      else
-        # add to section
-        sed "/\[${section}\]/a ${key}${delim}${val}" -i "${file}"
-      fi
-    else
-      # replace existing
-      sed "/^${key}${delim}/s/${delim}.*/${delim}${val}/" -i "${file}"
+    if [[ ! "${section}" ]]; then
+      # if no section is given, propagate the default section
+      section=${section_default}
     fi
+
+    if [[ ! "${comment}" ]]; then
+      # if no comment given, keep old comment
+      comment="${current_comment}"
+    fi
+    # maintenance area
+    # a) remove comment if new given / respect section
+    sed -i.bak "/^\[${section}\]/,/^\[.*\]/ s|^\(${comment_delim}\[${key}\] \).*$||" "${file}"
+    # b) remove old key / respect section
+    sed -i.bak "/^\[${section}\]/,/^\[.*\]/ s|^\(${key}=\).*$||" "${file}"
+    # c) remove all empty lines in ini file
+    sed -i.bak '/^[[:space:]]*$/d' "${file}"
+    # d) insert line break before every section for better readability
+    sed -i.bak $'s/^\\[/\\\n\\[/g' "${file}"
+
+    # add to section
+    if [[ ! "${comment}" ]]; then
+      # add new key/value _without_ comment
+      RET="/\\[${section}\\]/a\\
+${key}${delim}${val}"
+    else
+      # add new key/value _with_ preceeding comment
+      RET="/\\[${section}\\]/a\\
+${comment_delim}[${key}] ${comment}\\
+${key}${delim}${val}"
+    fi
+    sed -i.bak -e "${RET}" "${file}"
+    # this .bak dance is done for BSD/GNU portability: http://stackoverflow.com/a/22084103/151666
+    rm -f "${file}.bak"
   fi
 }
+
+if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
+  export -f ini_val
+else
+  ini_val "${@}"
+  exit ${?}
+fi

src/megamount.sh

@@ -1,10 +1,49 @@
-__dir=$(cd `dirname "${BASH_SOURCE[0]}"` && pwd)
+#!/usr/bin/env bash
+# BASH3 Boilerplate: megamount
+#
+# This file:
+#
+#  - Takes a URL (smb, nfs, afs) and tries to mount it at a given target directory
+#  - Forcefully unmounts any active mount at the target directory first
+#  - Displays the mount's contents for verification
+#
+# Depends on:
+#
+#  - ./parse_url.sh
+#
+# Usage as a function:
+#
+#  source megamount.sh
+#  megamount smb://janedoe:abc123@192.168.0.1/documents /mnt/documents
+#
+# Usage as a command:
+#
+#  megamount.sh smb://janedoe:abc123@192.168.0.1/documents /mnt/documents
+#
+# Based on a template by BASH3 Boilerplate vv2.7.2
+# http://bash3boilerplate.sh/#authors
+#
+# The MIT License (MIT)
+# Copyright (c) 2013 Kevin van Zonneveld and contributors
+# You are not obligated to bundle the LICENSE file with your b3bp projects as long
+# as you leave these references intact in the header comments of your source files.
 
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# shellcheck source=src/parse_url.sh
 source "${__dir}/parse_url.sh"
+
 function megamount () {
   local url="${1}"
   local target="${2}"
 
+  local proto
+  local user
+  local pass
+  local host
+  local port
+  local path
+
   proto=$(parse_url "${url}" "proto")
   user=$(parse_url "${url}" "user")
   pass=$(parse_url "${url}" "pass")
@@ -12,21 +51,28 @@ function megamount () {
   port=$(parse_url "${url}" "port")
   path=$(parse_url "${url}" "path")
 
-  umount -lf "${target}" || true
+  (umount -lf "${target}" || umount -f "${target}") > /dev/null 2>&1 || true
   mkdir -p "${target}"
-  if [ "${proto}" = "smb://" ]; then
+  if [[ "${proto}" = "smb://" ]]; then
     mount -t cifs --verbose -o "username=${user},password=${pass},hard" "//${host}/${path}" "${target}"
-  elif [ "${proto}" = "afp://" ]; then
+  elif [[ "${proto}" = "afp://" ]]; then
     # start syslog-ng
     # afpfsd || echo "Unable to run afpfsd. Does /dev/log exist?" && exit 1
     mount_afp "${url}" "${target}"
-  elif [ "${proto}" = "nfs://" ]; then
-    mount -t nfs --verbose -o "vers=3,nolock,soft,intr,rsize=32768,wsize=32768" ${host}:/${path} ${target}
+  elif [[ "${proto}" = "nfs://" ]]; then
+    mount -t nfs --verbose -o "vers=3,nolock,soft,intr,rsize=32768,wsize=32768" "${host}:/${path}" "${target}"
   else
-    echo "ERR: Unknown protocol ${proto}"
+    echo "ERR: Unknown protocol: '${proto}'"
     exit 1
   fi
 
   # chmod 777 "${target}"
   ls -al "${target}/"
 }
+
+if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
+  export -f megamount
+else
+  megamount "${@}"
+  exit ${?}
+fi

src/parse_url.sh

@@ -1,30 +1,66 @@
 #!/usr/bin/env bash
+# BASH3 Boilerplate: parse_url
+#
+# This file:
+#
+#  - Takes a URL and parses protocol, user, pass, host, port, path.
+#
+# Based on:
+#
+#  - http://stackoverflow.com/a/6174447/151666
+#
+# Usage as a function:
+#
+#  source parse_url.sh
+#  parse_url 'http://johndoe:abc123@example.com:8080/index.html' pass
+#
+# Usage as a command:
+#
+#  parse_url.sh 'http://johndoe:abc123@example.com:8080/index.html'
+#
+# Based on a template by BASH3 Boilerplate vv2.7.2
+# http://bash3boilerplate.sh/#authors
+#
+# The MIT License (MIT)
+# Copyright (c) 2013 Kevin van Zonneveld and contributors
+# You are not obligated to bundle the LICENSE file with your b3bp projects as long
+# as you leave these references intact in the header comments of your source files.
+
 function parse_url() {
-  # Based on http://stackoverflow.com/a/6174447/151666
   local parse="${1}"
-  local need="${2}"
+  local need="${2:-}"
 
-  local proto="$(echo $parse | grep :// | sed -e's,^\(.*://\).*,\1,g')"
-  local url="$(echo ${parse/$proto/})"
-  local userpass="$(echo $url | grep @ | cut -d@ -f1)"
-  local user="$(echo $userpass | grep : | cut -d: -f1)"
-  local pass="$(echo $userpass | grep : | cut -d: -f2)"
-  local hostport="$(echo ${url/$userpass@/} | cut -d/ -f1)"
-  local host="$(echo $hostport | grep : | cut -d: -f1)"
-  local port="$(echo $hostport | grep : | cut -d: -f2)"
-  local path="$(echo $url | grep / | cut -d/ -f2-)"
+  local proto
+  local url
+  local userpass
+  local user
+  local pass
+  local hostport
+  local host
+  local port
+  local path
 
-  [ -z "${user}" ] && user="${userpass}"
-  [ -z "${host}" ] && host="${hostport}"
-  if [ -z "${port}" ]; then
-    [ "${proto}" = "http://" ]  && port="80"
-    [ "${proto}" = "https://" ] && port="443"
-    [ "${proto}" = "mysql://" ] && port="3306"
-    [ "${proto}" = "redis://" ] && port="6379"
+  proto="$(echo "${parse}" | grep :// | sed -e's,^\(.*://\).*,\1,g')"
+  url="${parse/${proto}/}"
+  userpass="$(echo "${url}" | grep @ | cut -d@ -f1)"
+  user="$(echo "${userpass}" | grep : | cut -d: -f1)"
+  pass="$(echo "${userpass}" | grep : | cut -d: -f2)"
+  hostport="$(echo "${url/${userpass}@/}" | cut -d/ -f1)"
+  host="$(echo "${hostport}" | grep : | cut -d: -f1)"
+  port="$(echo "${hostport}" | grep : | cut -d: -f2)"
+  path="$(echo "${url}" | grep / | cut -d/ -f2-)"
+
+  [[ ! "${user}" ]] && user="${userpass}"
+  [[ ! "${host}" ]] && host="${hostport}"
+  if [[ ! "${port}" ]]; then
+    [[ "${proto}" = "http://" ]]  && port="80"
+    [[ "${proto}" = "https://" ]] && port="443"
+    [[ "${proto}" = "mysql://" ]] && port="3306"
+    [[ "${proto}" = "redis://" ]] && port="6379"
   fi
 
-  if [ -n "${need}" ]; then
-    echo ${!need}
+  if [[ "${need}" ]]; then
+    echo "${!need}"
   else
     echo ""
     echo " Use second argument to return just 1 variable."
@@ -39,3 +75,10 @@ function parse_url() {
     echo ""
   fi
 }
+
+if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
+  export -f parse_url
+else
+  parse_url "${@}"
+  exit ${?}
+fi

src/semver.sh

@@ -1,132 +0,0 @@
-#!/usr/bin/env sh
-# From: https://github.com/cloudflare/semver_bash
-# https://raw.githubusercontent.com/cloudflare/semver_bash/master/semver.sh
-
-function semverParseInto() {
-    local RE='[^0-9]*\([0-9]*\)[.]\([0-9]*\)[.]\([0-9]*\)\([0-9A-Za-z-]*\)'
-    #MAJOR
-    eval $2=`echo $1 | sed -e "s#$RE#\1#"`
-    #MINOR
-    eval $3=`echo $1 | sed -e "s#$RE#\2#"`
-    #MINOR
-    eval $4=`echo $1 | sed -e "s#$RE#\3#"`
-    #SPECIAL
-    eval $5=`echo $1 | sed -e "s#$RE#\4#"`
-}
-
-function semverEQ() {
-    local MAJOR_A=0
-    local MINOR_A=0
-    local PATCH_A=0
-    local SPECIAL_A=0
-
-    local MAJOR_B=0
-    local MINOR_B=0
-    local PATCH_B=0
-    local SPECIAL_B=0
-
-    semverParseInto $1 MAJOR_A MINOR_A PATCH_A SPECIAL_A
-    semverParseInto $2 MAJOR_B MINOR_B PATCH_B SPECIAL_B
-
-    if [ $MAJOR_A -ne $MAJOR_B ]; then
-        return 1
-    fi
-
-    if [ $MINOR_A -ne $MINOR_B ]; then
-        return 1
-    fi
-
-    if [ $PATCH_A -ne $PATCH_B ]; then
-        return 1
-    fi
-
-    if [[ "_$SPECIAL_A" != "_$SPECIAL_B" ]]; then
-        return 1
-    fi
-
-
-    return 0
-
-}
-
-function semverLT() {
-    local MAJOR_A=0
-    local MINOR_A=0
-    local PATCH_A=0
-    local SPECIAL_A=0
-
-    local MAJOR_B=0
-    local MINOR_B=0
-    local PATCH_B=0
-    local SPECIAL_B=0
-
-    semverParseInto $1 MAJOR_A MINOR_A PATCH_A SPECIAL_A
-    semverParseInto $2 MAJOR_B MINOR_B PATCH_B SPECIAL_B
-
-    if [ $MAJOR_A -lt $MAJOR_B ]; then
-        return 0
-    fi
-
-    if [[ $MAJOR_A -le $MAJOR_B  && $MINOR_A -lt $MINOR_B ]]; then
-        return 0
-    fi
-
-    if [[ $MAJOR_A -le $MAJOR_B  && $MINOR_A -le $MINOR_B && $PATCH_A -lt $PATCH_B ]]; then
-        return 0
-    fi
-
-    if [[ "_$SPECIAL_A"  == "_" ]] && [[ "_$SPECIAL_B"  == "_" ]] ; then
-        return 1
-    fi
-    if [[ "_$SPECIAL_A"  == "_" ]] && [[ "_$SPECIAL_B"  != "_" ]] ; then
-        return 1
-    fi
-    if [[ "_$SPECIAL_A"  != "_" ]] && [[ "_$SPECIAL_B"  == "_" ]] ; then
-        return 0
-    fi
-
-    if [[ "_$SPECIAL_A" < "_$SPECIAL_B" ]]; then
-        return 0
-    fi
-
-    return 1
-
-}
-
-function semverGT() {
-    semverEQ $1 $2
-    local EQ=$?
-
-    semverLT $1 $2
-    local LT=$?
-
-    if [ $EQ -ne 0 ] && [ $LT -ne 0 ]; then
-        return 0
-    else
-        return 1
-    fi
-}
-
-if [ "___semver.sh" == "___`basename $0`" ]; then
-
-MAJOR=0
-MINOR=0
-PATCH=0
-SPECIAL=""
-
-semverParseInto $1 MAJOR MINOR PATCH SPECIAL
-echo "$1 -> M: $MAJOR m:$MINOR p:$PATCH s:$SPECIAL"
-
-semverParseInto $2 MAJOR MINOR PATCH SPECIAL
-echo "$2 -> M: $MAJOR m:$MINOR p:$PATCH s:$SPECIAL"
-
-semverEQ $1 $2
-echo "$1 == $2 -> $?."
-
-semverLT $1 $2
-echo "$1 < $2 -> $?."
-
-semverGT $1 $2
-echo "$1 > $2 -> $?."
-
-fi

src/templater.sh

@@ -1,48 +1,68 @@
 #!/usr/bin/env bash
-# Copyright (c) 2014, Transloadit Ltd.
+# BASH3 Boilerplate: templater
 #
 # This file:
-#  - takes a source (template) & destination (config) filepath argument
-#  - and then replaces placeholders with variables found in the environment
 #
-# Run as:
+#  - takes a source (template) & destination (config) filepath argument
+#  - then replaces placeholders with variables found in the environment
+#
+# Usage as a function:
+#
+#  source templater.sh
+#  export NAME=kevin
+#  templater input.cfg output.cfg
+#
+# Usage as a command:
 #
 #  ALLOW_REMAINDERS=1 templater.sh input.cfg output.cfg
 #
-# Authors:
-#  - Kevin van Zonneveld <kevin@transloadit.com>
+# Based on a template by BASH3 Boilerplate vv2.7.2
+# http://bash3boilerplate.sh/#authors
+#
+# The MIT License (MIT)
+# Copyright (c) 2013 Kevin van Zonneveld and contributors
+# You are not obligated to bundle the LICENSE file with your b3bp projects as long
+# as you leave these references intact in the header comments of your source files.
 
-set -o pipefail
-set -o errexit
-# set -o xtrace
-# set -o nounset
+function templater() {
+  ALLOW_REMAINDERS="${ALLOW_REMAINDERS:-0}"
 
-sed=""
-[ -n "$(which sed)" ]  && sed="$(which sed)"
-[ -n "$(which gsed)" ] && sed="$(which gsed)"
+  templateSrc="${1:-}"
+  templateDst="${2:-}"
 
-ALLOW_REMAINDERS="${ALLOW_REMAINDERS:-0}"
+  if [[ ! -f "${templateSrc}" ]]; then
+    echo "ERROR: Template source '${templateSrc}' needs to exist"
+    exit 1
+  fi
+  if [[ ! "${templateDst}" ]]; then
+    echo "ERROR: Template destination '${templateDst}' needs to be specified"
+    exit 1
+  fi
 
-templateSrc="${1}"
-templateDst="${2}"
+  if [[ "$(command -v perl)" ]]; then
+    perl -p -e 's/\$\{(\w+)\}/(exists $ENV{$1} ? $ENV{$1} : "\${$1}")/eg' < "${templateSrc}" > "${templateDst}"
+  else
+    cp -f "${templateSrc}" "${templateDst}"
 
-if [ ! -f "${templateSrc}" ]; then
-  echo "ERROR: Template source '${templateSrc}' needs to exist"
-  exit 1
-fi
-if [ ! -n "${templateDst}" ]; then
-  echo "ERROR: Template destination '${templateDst}' needs to exist"
-  exit 1
-fi
-
-cp -f "${templateSrc}" "${templateDst}"
-for var in $(env |awk -F= '{print $1}' |egrep '^[A-Z0-9_]+$'); do
-  ${sed} "s#\${${var}}#${!var}#g" -i "${templateDst}"
-done
-
-# cat "${templateDst}"
-
-if grep '${' ${templateDst} && [ "${ALLOW_REMAINDERS}" == "0" ]; then
-   echo "ERROR: Unable to replace the above template vars"
-   exit 1
+    for var in $(env |awk -F= '{print $1}' |grep -E '^(_[A-Z0-9_]+|[A-Z0-9][A-Z0-9_]*)$'); do
+      sed -i.bak -e "s#\${${var}}#${!var//#/\\#/}#g" "${templateDst}"
+      # this .bak dance is done for BSD/GNU portability: http://stackoverflow.com/a/22084103/151666
+      rm -f "${templateDst}.bak"
+    done
+  fi
+
+  # cat "${templateDst}"
+
+  # shellcheck disable=SC2016
+  if grep '${' "${templateDst}" && [[ "${ALLOW_REMAINDERS}" = "0" ]]; then
+    echo "ERROR: Unable to replace the above template vars"
+    exit 1
+  fi
+}
+
+if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
+  export -f templater
+else
+  templater "${@}"
+  exit ${?}
 fi

test/acceptance.sh

@@ -1,65 +1,94 @@
 #!/usr/bin/env bash
+# This file:
+#
+#  - Executes one (or all) test scenarios
+#  - Replaces dynamic things like hostnames, IPs, dates, etc
+#  - Optionally saves the results as fixtures, that later runs will be compared against
+#
+# Usage:
+#
+#  ./deploy.sh
+#
+# Based on a template by BASH3 Boilerplate v2.0.0
+# http://bash3boilerplate.sh/#authors
+#
+# The MIT License (MIT)
+# Copyright (c) 2013 Kevin van Zonneveld and contributors
+# You are not obligated to bundle the LICENSE file with your b3bp projects as long
+# as you leave these references intact in the header comments of your source files.
 
-set -o pipefail
+# Exit on error. Append || true if you expect an error.
 set -o errexit
+# Exit on error inside any functions or subshells.
+set -o errtrace
+# Do not allow use of undefined vars. Use ${VAR:-} to use an undefined VAR
 set -o nounset
+# Catch the error in case mysqldump fails (but gzip succeeds) in `mysqldump |gzip`
+set -o pipefail
+# Turn on traces, useful while debugging but commented out by default
 # set -o xtrace
 
-# Set magic variables for current FILE & DIR
+# Set magic variables for current file, directory, os, etc.
 __dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 __file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
-__base="$(basename ${__file} .sh)"
+__base="$(basename "${__file}" .sh)"
 __root="$(cd "$(dirname "${__dir}")" && pwd)"
 
-scenarios="${1:-$(ls ${__dir}/scenario/|egrep -v ^prepare$)}"
-
 __sysTmpDir="${TMPDIR:-/tmp}"
 __sysTmpDir="${__sysTmpDir%/}" # <-- remove trailing slash on macosx
-__b3bpTmpDir="${__sysTmpDir}/b3bp"
-mkdir -p "${__b3bpTmpDir}"
+__accptstTmpDir=$(mktemp -d "${__sysTmpDir}/${__base}.XXXXXX")
 
-if [[ "${OSTYPE}" == "darwin"* ]]; then
-  cmdSed=gsed
-else
-  cmdSed=sed
+function cleanup_before_exit () { rm -r "${__accptstTmpDir:?}"; }
+trap cleanup_before_exit EXIT
+
+cmdSed="sed"
+cmdTimeout="timeout"
+
+if [[ "${OSTYPE}" = "darwin"* ]]; then
+  cmdSed="gsed"
+  cmdTimeout="gtimeout"
 fi
 
-if [[ "${OSTYPE}" == "darwin"* ]]; then
-  cmdTimeout="gtimeout --kill-after=6m 5m"
-else
-  cmdTimeout="timeout --kill-after=6m 5m"
-fi
-
-__node="$(which node)"
-
-__os="linux"
-if [[ "${OSTYPE}" == "darwin"* ]]; then
-  __os="darwin"
-fi
-__arch="amd64"
-
-
-if ! which "${cmdSed}" > /dev/null; then
+if [[ ! "$(command -v ${cmdSed})" ]]; then
   echo "Please install ${cmdSed}"
   exit 1
 fi
 
+if [[ ! "$(command -v ${cmdTimeout})" ]]; then
+  echo "Please install ${cmdTimeout}"
+  exit 1
+fi
+
+__node="$(command -v node)"
+__arch="amd64"
+
+# explicitly setting NO_COLOR to false will make b3bp ignore TERM
+# not being "xterm*" or "screen*" and STDERR not being connected to a terminal
+# it's the opposite of NO_COLOR="true" - it forces color, no matter what
+export NO_COLOR="false"
+
 # Running prepare before other scenarios is important on Travis,
 # so that stdio can diverge - and we can enforce stricter
 # stdio comparison on all other tests.
-for scenario in $(echo ${scenarios}); do
+while IFS=$'\n' read -r scenario; do
+  scenario="$(dirname "${scenario}")"
+  scenario="${scenario##${__dir}/scenario/}"
+
+  [[ "${scenario}" = "prepare" ]] && continue
+  [[ "${1:-}" ]] && [[ "${scenario}" != "${1}" ]] && continue
+
   echo "==> Scenario: ${scenario}"
   pushd "${__dir}/scenario/${scenario}" > /dev/null
 
     # Run scenario
-    (${cmdTimeout} bash ./run.sh \
-      > "${__b3bpTmpDir}/${scenario}.stdio" 2>&1; \
-      echo "${?}" > "${__b3bpTmpDir}/${scenario}.exitcode" \
+    (${cmdTimeout} --kill-after=6m 5m bash ./run.sh \
+      > "${__accptstTmpDir}/${scenario}.stdio" 2>&1; \
+      echo "${?}" > "${__accptstTmpDir}/${scenario}.exitcode" \
     ) || true
 
     # Clear out environmental specifics
-    for typ in $(echo stdio exitcode); do
-      curFile="${__b3bpTmpDir}/${scenario}.${typ}"
+    for typ in stdio exitcode; do
+      curFile="${__accptstTmpDir}/${scenario}.${typ}"
       "${cmdSed}" -i \
         -e "s@${__node}@{node}@g" "${curFile}" \
         -e "s@${__root}@{root}@g" "${curFile}" \
@@ -69,16 +98,16 @@ for scenario in $(echo ${scenarios}); do
         -e "s@${USER:-travis}@{user}@g" "${curFile}" \
         -e "s@travis@{user}@g" "${curFile}" \
         -e "s@kvz@{user}@g" "${curFile}" \
-        -e "s@{root}/node_modules/\.bin/node@{node}@g" "${curFile}" \
+        -e "s@{root}/node_modules/\\.bin/node@{node}@g" "${curFile}" \
         -e "s@{home}/build/{user}/fre{node}@{node}@g" "${curFile}" \
         -e "s@${HOSTNAME}@{hostname}@g" "${curFile}" \
-        -e "s@${__os}@{os}@g" "${curFile}" \
         -e "s@${__arch}@{arch}@g" "${curFile}" \
+        -e "s@${OSTYPE}@{OSTYPE}@g" "${curFile}" \
         -e "s@OSX@{os}@g" "${curFile}" \
         -e "s@Linux@{os}@g" "${curFile}" \
       || false
 
-      if [ "$(cat "${curFile}" |grep 'B3BP:STDIO_REPLACE_IPS' |wc -l)" -gt 0 ]; then
+      if grep -q 'ACCPTST:STDIO_REPLACE_IPS' "${curFile}"; then
         "${cmdSed}" -i \
           -r 's@[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}@{ip}@g' \
         "${curFile}"
@@ -89,45 +118,45 @@ for scenario in $(echo ${scenarios}); do
           -r 's@\{ip\}\s+@{ip} @g' \
         "${curFile}"
       fi
-      if [ "$(cat "${curFile}" |grep 'B3BP:STDIO_REPLACE_UUIDS' |wc -l)" -gt 0 ]; then
+      if grep -q 'ACCPTST:STDIO_REPLACE_UUIDS' "${curFile}"; then
         "${cmdSed}" -i \
           -r 's@[0-9a-f\-]{32,40}@{uuid}@g' \
         "${curFile}"
       fi
-      if [ "$(cat "${curFile}" |grep 'B3BP:STDIO_REPLACE_BIGINTS' |wc -l)" -gt 0 ]; then
+      if grep -q 'ACCPTST:STDIO_REPLACE_BIGINTS' "${curFile}"; then
         # Such as: 3811298194
         "${cmdSed}" -i \
           -r 's@[0-9]{7,64}@{bigint}@g' \
         "${curFile}"
       fi
-      if [ "$(cat "${curFile}" |grep 'B3BP:STDIO_REPLACE_DATETIMES' |wc -l)" -gt 0 ]; then
+      if grep -q 'ACCPTST:STDIO_REPLACE_DATETIMES' "${curFile}"; then
         # Such as: 2016-02-10 15:38:44.420094
         "${cmdSed}" -i \
           -r 's@[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}@{datetime}@g' \
         "${curFile}"
       fi
-      if [ "$(cat "${curFile}" |grep 'B3BP:STDIO_REPLACE_LONGTIMES' |wc -l)" -gt 0 ]; then
+      if grep -q 'ACCPTST:STDIO_REPLACE_LONGTIMES' "${curFile}"; then
         # Such as: 2016-02-10 15:38:44.420094
         "${cmdSed}" -i \
           -r 's@[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}.[0-9]{6}@{longtime}@g' \
         "${curFile}"
       fi
-      if [ "$(cat "${curFile}" |grep 'B3BP:STDIO_REPLACE_DURATIONS' |wc -l)" -gt 0 ]; then
+      if grep -q 'ACCPTST:STDIO_REPLACE_DURATIONS' "${curFile}"; then
         # Such as: 0:00:00.001991
         "${cmdSed}" -i \
           -r 's@[0-9]{1,2}:[0-9]{2}:[0-9]{2}.[0-9]{6}@{duration}@g' \
         "${curFile}"
       fi
-      if [ "$(cat "${curFile}" |grep 'B3BP:STDIO_REPLACE_REMOTE_EXEC' |wc -l)" -gt 0 ]; then
-        egrep -v 'remote-exec\): [ a-zA-Z]' "${curFile}" > "${__sysTmpDir}/b3bp-filtered.txt"
-        mv "${__sysTmpDir}/b3bp-filtered.txt" "${curFile}"
+      if grep -q 'ACCPTST:STDIO_REPLACE_REMOTE_EXEC' "${curFile}"; then
+        grep -Ev 'remote-exec\): [ a-zA-Z]' "${curFile}" > "${__sysTmpDir}/accptst-filtered.txt"
+        mv "${__sysTmpDir}/accptst-filtered.txt" "${curFile}"
       fi
     done
 
     # Save these as new fixtures?
-    if [ "${SAVE_FIXTURES:-}" = "true" ]; then
-      for typ in $(echo stdio exitcode); do
-        curFile="${__b3bpTmpDir}/${scenario}.${typ}"
+    if [[ "${SAVE_FIXTURES:-}" = "true" ]]; then
+      for typ in stdio exitcode; do
+        curFile="${__accptstTmpDir}/${scenario}.${typ}"
         cp -f \
           "${curFile}" \
           "${__dir}/fixture/${scenario}.${typ}"
@@ -135,32 +164,69 @@ for scenario in $(echo ${scenarios}); do
     fi
 
     # Compare
-    for typ in $(echo stdio exitcode); do
-      curFile="${__b3bpTmpDir}/${scenario}.${typ}"
+    for typ in stdio exitcode; do
+      curFile="${__accptstTmpDir}/${scenario}.${typ}"
 
       echo -n "    comparing ${typ}.. "
 
-      if [ "${typ}" = "stdio" ]; then
-        if [ "$(cat "${curFile}" |grep 'B3BP:STDIO_SKIP_COMPARE' |wc -l)" -gt 0 ]; then
+      if [[ "${typ}" = "stdio" ]]; then
+        if grep -q 'ACCPTST:STDIO_SKIP_COMPARE' "${curFile}"; then
           echo "skip"
           continue
         fi
       fi
 
-      diff \
-        --strip-trailing-cr \
-        "${__dir}/fixture/${scenario}.${typ}" \
-        "${curFile}" || ( \
-        echo -e "\n\n==> MISMATCH OF: ${typ}";
-        echo -e "\n\n==> EXPECTED STDIO: ";
-        cat "${__dir}/fixture/${scenario}.stdio";
-        echo -e "\n\n==> ACTUAL STDIO: ";
-        cat "${__b3bpTmpDir}/${scenario}.stdio";
-        exit 1; \
-      )
+      if ! diff --strip-trailing-cr "${__dir}/fixture/${scenario}.${typ}" "${curFile}"; then
+        echo -e "\\n\\n==> MISMATCH OF: ${scenario}.${typ} ---^"
+        echo -e "\\n\\n==> EXPECTED STDIO: "
+        cat "${__dir}/fixture/${scenario}.stdio" || true
+        echo -e "\\n\\n==> ACTUAL STDIO: "
+        cat "${__accptstTmpDir}/${scenario}.stdio" || true
+        exit 1
+      fi
 
       echo "✓"
     done
 
   popd > /dev/null
-done
+done <<< "$(find "${__dir}/scenario" -type f -iname 'run.sh')"
+
+[[ "${1:-}" ]] && exit 0
+
+# Ensure correct syntax with all available bashes
+
+# shellcheck disable=SC2230
+# "command -v" is not a substitute for "which -a"
+while IFS=$'\n' read -r bash; do
+  if [[ "${bash:-}" = "" ]]; then
+    continue
+  fi
+  # shellcheck disable=SC2016
+  echo "==> ${bash} -n $(${bash} -c 'echo "(${BASH_VERSION})"')"
+  pushd "${__root}" > /dev/null
+
+  failed="false"
+
+  while IFS=$'\n' read -r file; do
+    [[ "${file}" =~ ^\./node_modules/ ]] && continue
+
+    echo -n "    ${file}.. "
+
+    if ! "${bash}" -n "${file}" 2>> "${__accptstTmpDir}/${bash//\//.}.err"; then
+      echo "✗"
+      failed="true"
+      continue
+    fi
+
+    echo "✓"
+  done <<< "$(find . -type f -iname '*.sh')"
+
+  popd > /dev/null
+
+  if [[ "${failed}" = "true" ]]; then
+    cat "${__accptstTmpDir}/${bash//\//.}.err"
+    exit 1
+  fi
+done <<< "$(which -a bash 2>/dev/null)"
+
+exit 0

test/fixture/double-source.stdio

@@ -0,0 +1,25 @@
+ACCPTST:STDIO_REPLACE_DATETIMES
+{datetime} UTC [    debug] cli arg arg_f = () -> {tmpdir}/x
+{datetime} UTC [     info] __i_am_main_script: 0
+{datetime} UTC [     info] __file: {root}/example.sh
+{datetime} UTC [     info] __dir: {root}
+{datetime} UTC [     info] __base: example
+{datetime} UTC [     info] OSTYPE: {OSTYPE}
+{datetime} UTC [     info] arg_f: {tmpdir}/x
+{datetime} UTC [     info] arg_d: 0
+{datetime} UTC [     info] arg_v: 0
+{datetime} UTC [     info] arg_h: 0
+{datetime} UTC [     info] arg_i: 0
+{datetime} UTC [     info] arg_x: 0
+{datetime} UTC [     info] multiple lines example - line #1
+{datetime} UTC [     info] multiple lines example - line #2
+{datetime} UTC [     info] imagine logging the output of 'ls -al /path/'
+{datetime} UTC [    debug] Info useful to developers for debugging the application, not useful during operations.
+{datetime} UTC [     info] Normal operational messages - may be harvested for reporting, measuring throughput, etc. - no action required.
+{datetime} UTC [   notice] Events that are unusual but not error conditions - might be summarized in an email to developers or admins to spot potential problems - no immediate action required.
+{datetime} UTC [  warning] Warning messages, not an error, but indication that an error will occur if action is not taken, e.g. file system 85% full - each item must be resolved within a given time.
+{datetime} UTC [    error] Non-urgent failures, these should be relayed to developers or admins; each item must be resolved within a given time.
+{datetime} UTC [ critical] Should be corrected immediately, but indicates failure in a primary system, an example is a loss of a backup ISP connection.
+{datetime} UTC [    alert] Should be corrected immediately, therefore notify staff who can fix the problem. An example would be the loss of a primary ISP connection.
+{datetime} UTC [emergency] A "panic" condition usually affecting multiple apps/servers/sites. At this level it would usually notify all tech staff on call.
+{datetime} UTC [     info] Cleaning up. Done

test/fixture/help.stdio

@@ -1,11 +0,0 @@
-B3BP:STDIO_REPLACE_DATETIMES
-
- Help using {root}/main.sh
-
-  -f --file  [arg] Filename to process. Required.
-  -t --temp  [arg] Location of tempfile. Default="{tmpdir}/bar"
-  -v               Enable verbose mode, print script as it is executed
-  -d --debug       Enables debug mode
-  -h --help        This page
-
-{datetime} UTC [     info] Cleaning up. Done

test/fixture/ini_val.stdio

@@ -0,0 +1,42 @@
+--> command: Read 3 values
+exists
+127.0.0.1
+nginx, nodejs
+
+--> command: Replace three values in-place and show result
+
+[default]
+orphan=no more
+
+[connection]
+host=192.168.0.1
+
+[software]
+packages=vim
+
+[comment]
+;[command] got this new comment
+command=works like a chame
+;[new_command] last addition will be moved downwards again after next command
+new_command=commented too
+--> function: Read 3 values
+exists
+127.0.0.1
+nginx, nodejs
+
+--> function: Replace three values in-place and show result
+
+[default]
+orphan=no more
+
+[connection]
+host=192.168.0.1
+
+[software]
+packages=vim
+
+[comment]
+;[command] got this new comment
+command=works like a chame
+;[new_command] last addition will be moved downwards again after next command
+new_command=commented too

test/fixture/main-debug.stdio

@@ -1,19 +1,25 @@
-B3BP:STDIO_REPLACE_DATETIMES
+ACCPTST:STDIO_REPLACE_DATETIMES
 {datetime} UTC [    debug] cli arg arg_f = () -> {tmpdir}/x
+{datetime} UTC [     info] __i_am_main_script: 1
 {datetime} UTC [     info] __file: {root}/main.sh
 {datetime} UTC [     info] __dir: {root}
 {datetime} UTC [     info] __base: main
-{datetime} UTC [     info] __os: {os}
+{datetime} UTC [     info] OSTYPE: {OSTYPE}
 {datetime} UTC [     info] arg_f: {tmpdir}/x
 {datetime} UTC [     info] arg_d: 0
 {datetime} UTC [     info] arg_v: 0
 {datetime} UTC [     info] arg_h: 0
+{datetime} UTC [     info] arg_i: 0
+{datetime} UTC [     info] arg_x: 0
+{datetime} UTC [     info] multiple lines example - line #1
+{datetime} UTC [     info] multiple lines example - line #2
+{datetime} UTC [     info] imagine logging the output of 'ls -al /path/'
 {datetime} UTC [    debug] Info useful to developers for debugging the application, not useful during operations.
 {datetime} UTC [     info] Normal operational messages - may be harvested for reporting, measuring throughput, etc. - no action required.
 {datetime} UTC [   notice] Events that are unusual but not error conditions - might be summarized in an email to developers or admins to spot potential problems - no immediate action required.
-{datetime} UTC [  warning] Warning messages, not an error, but indication that an error will occur if action is not taken, e.g. file system 85% full - each item must be resolved within a given time. This is a debug message
+{datetime} UTC [  warning] Warning messages, not an error, but indication that an error will occur if action is not taken, e.g. file system 85% full - each item must be resolved within a given time.
 {datetime} UTC [    error] Non-urgent failures, these should be relayed to developers or admins; each item must be resolved within a given time.
 {datetime} UTC [ critical] Should be corrected immediately, but indicates failure in a primary system, an example is a loss of a backup ISP connection.
-{datetime} UTC [    alert] Should be corrected immediately, therefore notify staff who can fix the problem. An example would be the loss of a primary ISP connection.
-{datetime} UTC [emergency] A "panic" condition usually affecting multiple apps/servers/sites. At this level it would usually notify all tech staff on call.
+{datetime} UTC [    alert] Should be corrected immediately, therefore notify staff who can fix the problem. An example would be the loss of a primary ISP connection.
+{datetime} UTC [emergency] A "panic" condition usually affecting multiple apps/servers/sites. At this level it would usually notify all tech staff on call.
 {datetime} UTC [     info] Cleaning up. Done

test/fixture/main-help.stdio

@@ -0,0 +1,19 @@
+ACCPTST:STDIO_REPLACE_DATETIMES
+
+ Help using {root}/main.sh
+
+  -f --file  [arg] Filename to process. Required.
+  -t --temp  [arg] Location of tempfile. Default="{tmpdir}/bar"
+  -v               Enable verbose mode, print script as it is executed
+  -d --debug       Enables debug mode
+  -h --help        This page
+  -n --no-color    Disable color output
+  -1 --one         Do just one thing
+  -i --input [arg] File to process. Can be repeated.
+  -x               Specify a flag. Can be repeated.
+
+ This is Bash3 Boilerplate's help text. Feel free to add any description of your
+ program or elaborate more on command-line arguments. This section is not
+ parsed and will be added as-is to the help.
+
+{datetime} UTC [     info] Cleaning up. Done

test/fixture/main-longopt.exitcode

@@ -0,0 +1 @@
+0

test/fixture/main-longopt.stdio

@@ -1,4 +1,4 @@
-B3BP:STDIO_REPLACE_DATETIMES
+ACCPTST:STDIO_REPLACE_DATETIMES
 {datetime} UTC [     info] arg_f: {tmpdir}/x
 {datetime} UTC [     info] arg_f: {tmpdir}/x
 {datetime} UTC [     info] arg_f: {tmpdir}/x

test/fixture/main-nocolor.exitcode

@@ -0,0 +1 @@
+1

test/fixture/main-nocolor.stdio

@@ -1,17 +1,23 @@
-B3BP:STDIO_REPLACE_DATETIMES
+ACCPTST:STDIO_REPLACE_DATETIMES
 {datetime} UTC [    debug] cli arg arg_f = () -> {tmpdir}/x
+{datetime} UTC [     info] __i_am_main_script: 1
 {datetime} UTC [     info] __file: {root}/main.sh
 {datetime} UTC [     info] __dir: {root}
 {datetime} UTC [     info] __base: main
-{datetime} UTC [     info] __os: {os}
+{datetime} UTC [     info] OSTYPE: {OSTYPE}
 {datetime} UTC [     info] arg_f: {tmpdir}/x
 {datetime} UTC [     info] arg_d: 0
 {datetime} UTC [     info] arg_v: 0
 {datetime} UTC [     info] arg_h: 0
+{datetime} UTC [     info] arg_i: 0
+{datetime} UTC [     info] arg_x: 0
+{datetime} UTC [     info] multiple lines example - line #1
+{datetime} UTC [     info] multiple lines example - line #2
+{datetime} UTC [     info] imagine logging the output of 'ls -al /path/'
 {datetime} UTC [    debug] Info useful to developers for debugging the application, not useful during operations.
 {datetime} UTC [     info] Normal operational messages - may be harvested for reporting, measuring throughput, etc. - no action required.
 {datetime} UTC [   notice] Events that are unusual but not error conditions - might be summarized in an email to developers or admins to spot potential problems - no immediate action required.
-{datetime} UTC [  warning] Warning messages, not an error, but indication that an error will occur if action is not taken, e.g. file system 85% full - each item must be resolved within a given time. This is a debug message
+{datetime} UTC [  warning] Warning messages, not an error, but indication that an error will occur if action is not taken, e.g. file system 85% full - each item must be resolved within a given time.
 {datetime} UTC [    error] Non-urgent failures, these should be relayed to developers or admins; each item must be resolved within a given time.
 {datetime} UTC [ critical] Should be corrected immediately, but indicates failure in a primary system, an example is a loss of a backup ISP connection.
 {datetime} UTC [    alert] Should be corrected immediately, therefore notify staff who can fix the problem. An example would be the loss of a primary ISP connection.

test/fixture/main-repeated.exitcode

@@ -0,0 +1 @@
+0

test/fixture/main-repeated.stdio

@@ -0,0 +1,9 @@
+ACCPTST:STDIO_REPLACE_DATETIMES
+{datetime} UTC [     info] arg_i:
+{datetime} UTC [     info]  - simple_input
+{datetime} UTC [     info]  - input_in_quotes
+{datetime} UTC [     info]  - input with spaces
+{datetime} UTC [     info]  - input with "quotes"
+{datetime} UTC [     info]  - last_input
+{datetime} UTC [     info] arg_x: 3
+{datetime} UTC [     info] arg_x: 4

test/fixture/main-usage-defaults.exitcode

@@ -0,0 +1 @@
+0

test/fixture/main-usage-defaults.stdio

@@ -0,0 +1,7 @@
+ACCPTST:STDIO_REPLACE_DATETIMES
+{datetime} UTC [     info] arg_1: 0
+{datetime} UTC [     info] arg_2: 0
+{datetime} UTC [     info] arg_3: 'THREE'
+{datetime} UTC [     info] arg_4: "FOUR"
+{datetime} UTC [     info] arg_5: OOOPS
+{datetime} UTC [     info] arg_6: 

test/fixture/main-usage-validation.exitcode

@@ -0,0 +1 @@
+0

test/fixture/main-usage-validation.stdio

@@ -0,0 +1,169 @@
+ACCPTST:STDIO_REPLACE_DATETIMES
+# complain about -3
+
+ Option -3 (--three) requires an argument
+
+  -0 --zero        Do nothing.
+  -1 --one         Do one thing. Required.
+                   More description.
+  -2 --two         Do two things.
+                   More. Required. Description.
+  -3 --three [arg] Do three things.
+                   Required.
+  -4 --four  {arg} Do four things.
+  -5 --five  {arg} Do five things. Required. Maybe.
+  -6 --six   [arg] Do six things. Not Required.
+                   Required, it is not.
+  -7 --seven [arg] Required. Or bust.
+  -8 --eight [arg] Do eight things.
+                   More.Required.Description.
+  -a         [arg] Do A.   Required.
+                   Default="do-a"
+  -b         {arg} Do B.Default="do-b"
+  -c         [arg] Required.   Default="do-c"
+  -d         {arg} Default="do-d"
+
+ This is Bash3 Boilerplate's help text. Feel free to add any description of your
+ program or elaborate more on command-line arguments. This section is not
+ parsed and will be added as-is to the help.
+
+# complain about -4
+
+ Option -4 (--four) requires an argument
+
+  -0 --zero        Do nothing.
+  -1 --one         Do one thing. Required.
+                   More description.
+  -2 --two         Do two things.
+                   More. Required. Description.
+  -3 --three [arg] Do three things.
+                   Required.
+  -4 --four  {arg} Do four things.
+  -5 --five  {arg} Do five things. Required. Maybe.
+  -6 --six   [arg] Do six things. Not Required.
+                   Required, it is not.
+  -7 --seven [arg] Required. Or bust.
+  -8 --eight [arg] Do eight things.
+                   More.Required.Description.
+  -a         [arg] Do A.   Required.
+                   Default="do-a"
+  -b         {arg} Do B.Default="do-b"
+  -c         [arg] Required.   Default="do-c"
+  -d         {arg} Default="do-d"
+
+ This is Bash3 Boilerplate's help text. Feel free to add any description of your
+ program or elaborate more on command-line arguments. This section is not
+ parsed and will be added as-is to the help.
+
+# complain about -5
+
+ Option -5 (--five) requires an argument
+
+  -0 --zero        Do nothing.
+  -1 --one         Do one thing. Required.
+                   More description.
+  -2 --two         Do two things.
+                   More. Required. Description.
+  -3 --three [arg] Do three things.
+                   Required.
+  -4 --four  {arg} Do four things.
+  -5 --five  {arg} Do five things. Required. Maybe.
+  -6 --six   [arg] Do six things. Not Required.
+                   Required, it is not.
+  -7 --seven [arg] Required. Or bust.
+  -8 --eight [arg] Do eight things.
+                   More.Required.Description.
+  -a         [arg] Do A.   Required.
+                   Default="do-a"
+  -b         {arg} Do B.Default="do-b"
+  -c         [arg] Required.   Default="do-c"
+  -d         {arg} Default="do-d"
+
+ This is Bash3 Boilerplate's help text. Feel free to add any description of your
+ program or elaborate more on command-line arguments. This section is not
+ parsed and will be added as-is to the help.
+
+# complain about -8 (because -7 syntax is not supported)
+
+ Option -8 (--eight) requires an argument
+
+  -0 --zero        Do nothing.
+  -1 --one         Do one thing. Required.
+                   More description.
+  -2 --two         Do two things.
+                   More. Required. Description.
+  -3 --three [arg] Do three things.
+                   Required.
+  -4 --four  {arg} Do four things.
+  -5 --five  {arg} Do five things. Required. Maybe.
+  -6 --six   [arg] Do six things. Not Required.
+                   Required, it is not.
+  -7 --seven [arg] Required. Or bust.
+  -8 --eight [arg] Do eight things.
+                   More.Required.Description.
+  -a         [arg] Do A.   Required.
+                   Default="do-a"
+  -b         {arg} Do B.Default="do-b"
+  -c         [arg] Required.   Default="do-c"
+  -d         {arg} Default="do-d"
+
+ This is Bash3 Boilerplate's help text. Feel free to add any description of your
+ program or elaborate more on command-line arguments. This section is not
+ parsed and will be added as-is to the help.
+
+# complain about -d (because -d syntax is not supported)
+
+ Option -d requires an argument
+
+  -0 --zero        Do nothing.
+  -1 --one         Do one thing. Required.
+                   More description.
+  -2 --two         Do two things.
+                   More. Required. Description.
+  -3 --three [arg] Do three things.
+                   Required.
+  -4 --four  {arg} Do four things.
+  -5 --five  {arg} Do five things. Required. Maybe.
+  -6 --six   [arg] Do six things. Not Required.
+                   Required, it is not.
+  -7 --seven [arg] Required. Or bust.
+  -8 --eight [arg] Do eight things.
+                   More.Required.Description.
+  -a         [arg] Do A.   Required.
+                   Default="do-a"
+  -b         {arg} Do B.Default="do-b"
+  -c         [arg] Required.   Default="do-c"
+  -d         {arg} Default="do-d"
+
+ This is Bash3 Boilerplate's help text. Feel free to add any description of your
+ program or elaborate more on command-line arguments. This section is not
+ parsed and will be added as-is to the help.
+
+# complain about nothing
+{datetime} UTC [     info] arg_0: 0
+{datetime} UTC [     info] arg_1: 0
+{datetime} UTC [     info] arg_2: 0
+{datetime} UTC [     info] arg_3: arg3
+{datetime} UTC [     info] arg_4: arg4
+{datetime} UTC [     info] arg_5: arg5
+{datetime} UTC [     info] arg_6: 
+{datetime} UTC [     info] arg_7: 
+{datetime} UTC [     info] arg_8: arg8
+{datetime} UTC [     info] arg_a: do-a
+{datetime} UTC [     info] arg_b: do-b
+{datetime} UTC [     info] arg_c: do-c
+{datetime} UTC [     info] arg_d: argd
+# test for issue #108
+{datetime} UTC [     info] arg_0: 1
+{datetime} UTC [     info] arg_1: 0
+{datetime} UTC [     info] arg_2: 0
+{datetime} UTC [     info] arg_3: arg3
+{datetime} UTC [     info] arg_4: value
+{datetime} UTC [     info] arg_5: arg5
+{datetime} UTC [     info] arg_6: 
+{datetime} UTC [     info] arg_7: 
+{datetime} UTC [     info] arg_8: arg8
+{datetime} UTC [     info] arg_a: do-a
+{datetime} UTC [     info] arg_b: do-b
+{datetime} UTC [     info] arg_c: do-c
+{datetime} UTC [     info] arg_d: argd

test/fixture/megamount.exitcode

@@ -0,0 +1 @@
+1

test/fixture/megamount.stdio

@@ -0,0 +1,2 @@
+ERR: Unknown protocol: 'foobarfs://'
+ERR: Unknown protocol: 'foobarfs://'

test/fixture/parse_url.exitcode

@@ -0,0 +1 @@
+0

test/fixture/parse_url.stdio

@@ -0,0 +1,24 @@
+abc123
+
+ Use second argument to return just 1 variable.
+ parse_url() demo: 
+
+   proto: http://
+   user:  johndoe
+   pass:  abc123
+   host:  example.com
+   port:  8080
+   path:  index.html
+
+abc123
+
+ Use second argument to return just 1 variable.
+ parse_url() demo: 
+
+   proto: http://
+   user:  johndoe
+   pass:  abc123
+   host:  example.com
+   port:  8080
+   path:  index.html
+

test/fixture/templater.exitcode

@@ -0,0 +1 @@
+1

test/fixture/templater.stdio

@@ -0,0 +1,14 @@
+--
+[connection]
+host = 127.0.0.1
+--
+[connection]
+host = 127.0.0.1
+--
+port = ${I_DONT_EXIST}
+[connection]
+host = 127.0.0.1
+port = ${I_DONT_EXIST}
+--
+port = ${I_DONT_EXIST}
+ERROR: Unable to replace the above template vars

test/scenario/debug/run.sh

@@ -1,15 +0,0 @@
-#!/usr/bin/env bash
-set -o pipefail
-set -o errexit
-set -o nounset
-# set -o xtrace
-
-# Set magic variables for current FILE & DIR
-__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
-__base="$(basename ${__file} .sh)"
-__root="$(cd "$(dirname $(dirname $(dirname "${__dir}")))" && pwd)"
-
-echo "B3BP:STDIO_REPLACE_DATETIMES"
-
-env LOG_LEVEL=8 bash "${__root}/main.sh" -f /tmp/x

test/scenario/double-source/run.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+export LOG_LEVEL=7
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+# shellcheck source=example.sh
+source "${__root}/example.sh" -f /tmp/x

test/scenario/help/run.sh

@@ -1,15 +0,0 @@
-#!/usr/bin/env bash
-set -o pipefail
-set -o errexit
-set -o nounset
-# set -o xtrace
-
-# Set magic variables for current FILE & DIR
-__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
-__base="$(basename ${__file} .sh)"
-__root="$(cd "$(dirname $(dirname $(dirname "${__dir}")))" && pwd)"
-
-echo "B3BP:STDIO_REPLACE_DATETIMES"
-
-bash "${__root}/main.sh" -h

test/scenario/ini_val/data.ini

@@ -0,0 +1,8 @@
+[default]
+orphan=exists
+
+[connection]
+host=127.0.0.1
+
+[software]
+packages=nginx, nodejs

test/scenario/ini_val/run.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+# Set magic variables for current FILE & DIR
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+# echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+
+# Use as standalone:
+cp -f data.ini dummy.ini
+echo "--> command: Read 3 values"
+bash "${__root}/src/ini_val.sh" ./dummy.ini orphan
+bash "${__root}/src/ini_val.sh" ./dummy.ini connection.host
+bash "${__root}/src/ini_val.sh" ./dummy.ini software.packages
+bash "${__root}/src/ini_val.sh" ./dummy.ini comment.command
+
+echo "--> command: Replace three values in-place and show result"
+bash "${__root}/src/ini_val.sh" ./dummy.ini orphan "no more"
+bash "${__root}/src/ini_val.sh" ./dummy.ini connection.host "192.168.0.1"
+bash "${__root}/src/ini_val.sh" ./dummy.ini software.packages "vim"
+
+bash "${__root}/src/ini_val.sh" ./dummy.ini comment.command "commented" "this key is commented"
+bash "${__root}/src/ini_val.sh" ./dummy.ini comment.new_command "commented too" "last addition will be moved downwards again after next command"
+bash "${__root}/src/ini_val.sh" ./dummy.ini comment.command "works like a chame" "got this new comment"
+cat dummy.ini
+rm -f dummy.ini
+
+# Use as include:
+cp -f data.ini dummy.ini
+
+# shellcheck source=main.sh
+source "${__root}/src/ini_val.sh"
+
+echo "--> function: Read 3 values"
+ini_val ./dummy.ini orphan
+ini_val ./dummy.ini connection.host
+ini_val ./dummy.ini software.packages
+ini_val ./dummy.ini comment.command
+
+echo "--> function: Replace three values in-place and show result"
+ini_val ./dummy.ini orphan "no more"
+ini_val ./dummy.ini connection.host "192.168.0.1"
+ini_val ./dummy.ini software.packages "vim"
+
+ini_val ./dummy.ini comment.command "commented" "this key is commited"
+ini_val ./dummy.ini comment.new_command "commented too" "last addition will be moved downwards again after next command"
+ini_val ./dummy.ini comment.command "works like a chame" "got this new comment"
+cat dummy.ini
+rm -f dummy.ini

test/scenario/longopt/run.sh

@@ -1,17 +0,0 @@
-#!/usr/bin/env bash
-# set -o pipefail
-# set -o errexit
-set -o nounset
-# set -o xtrace
-
-# Set magic variables for current FILE & DIR
-__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
-__base="$(basename ${__file} .sh)"
-__root="$(cd "$(dirname $(dirname $(dirname "${__dir}")))" && pwd)"
-
-echo "B3BP:STDIO_REPLACE_DATETIMES"
-
-(env LOG_LEVEL=6 bash "${__root}/main.sh" --file /tmp/x;
-env LOG_LEVEL=6 bash "${__root}/main.sh" --file=/tmp/x;
-env LOG_LEVEL=6 bash "${__root}/main.sh" -f /tmp/x) 2>&1 |grep arg_f

test/scenario/main-debug/run.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+env LOG_LEVEL=7 bash "${__root}/main.sh" -f /tmp/x

test/scenario/main-help/run.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+bash "${__root}/main.sh" -f /tmp/x -h

test/scenario/main-longopt/run.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+# set -o pipefail
+# set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+(
+  env LOG_LEVEL=6 bash "${__root}/main.sh" --file /tmp/x;
+  env LOG_LEVEL=6 bash "${__root}/main.sh" --file=/tmp/x;
+  env LOG_LEVEL=6 bash "${__root}/main.sh" -f /tmp/x
+) 2>&1 |grep arg_f

test/scenario/main-nocolor/run.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+env LOG_LEVEL=7 NO_COLOR=true bash "${__root}/main.sh" -f /tmp/x

test/scenario/main-repeated/run.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+# set -o pipefail
+# set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+(
+  env LOG_LEVEL="${LOG_LEVEL:-6}" bash "${__root}/main.sh" -f dummy -i simple_input -i "input_in_quotes" -i "input with spaces" -i "input with \"quotes\"" -i last_input
+) 2>&1 |grep arg_i -A 5
+
+(
+  env LOG_LEVEL="${LOG_LEVEL:-6}" bash "${__root}/main.sh" -x -f dummy -x -x
+  env LOG_LEVEL="${LOG_LEVEL:-6}" bash "${__root}/main.sh" -f dummy -xxxx
+) 2>&1 |grep arg_x

test/scenario/main-usage-defaults/run.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+read -r -d '' __usage <<-'EOF' || true # exits non-zero when EOF encountered
+  -1 --one         Do one thing. Default="ONE"
+                   More description.
+  -2 --two         Do two things.
+                   More description. Default="TWO"
+  -3 --three [arg] Do three things. Default="'THREE'"
+                   More description.
+  -4 --four  [arg] Do four things.
+                   More description. Default='"FOUR"'
+  -5 --five  [arg] Do five things. Default="FIVE"
+                   More description. Default='OOOPS'
+  -6 --six   [arg] Do six things.
+                   More description.
+EOF
+
+export __usage
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+# shellcheck source=main.sh
+source "${__root}/main.sh"
+
+for argument in ${!arg_*}; do info "${argument}: ${!argument}"; done

test/scenario/main-usage-validation/run.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+# shellcheck source=main.sh
+
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+read -r -d '' __usage <<-'EOF' || true # exits non-zero when EOF encountered
+  -0 --zero        Do nothing.
+  -1 --one         Do one thing. Required.
+                   More description.
+  -2 --two         Do two things.
+                   More. Required. Description.
+  -3 --three [arg] Do three things.
+                   Required.
+  -4 --four  {arg} Do four things.
+  -5 --five  {arg} Do five things. Required. Maybe.
+  -6 --six   [arg] Do six things. Not Required.
+                   Required, it is not.
+  -7 --seven [arg] Required. Or bust.
+  -8 --eight [arg] Do eight things.
+                   More.Required.Description.
+  -a         [arg] Do A.   Required.
+                   Default="do-a"
+  -b         {arg} Do B.Default="do-b"
+  -c         [arg] Required.   Default="do-c"
+  -d         {arg} Default="do-d"
+EOF
+
+export __usage
+export NO_COLOR="true"
+
+echo "ACCPTST:STDIO_REPLACE_DATETIMES"
+
+echo "# complain about -3"
+(source "${__root}/main.sh") || true
+
+echo "# complain about -4"
+(source "${__root}/main.sh" -3 arg3) || true
+
+echo "# complain about -5"
+(source "${__root}/main.sh" -3 arg3 -4 arg4) || true
+
+echo "# complain about -8 (because -7 syntax is not supported)"
+(source "${__root}/main.sh" -3 arg3 -4 arg4 -5 arg5) || true
+
+echo "# complain about -d (because -d syntax is not supported)"
+(source "${__root}/main.sh" -3 arg3 -4 arg4 -5 arg5 -8 arg8) || true
+
+echo "# complain about nothing"
+(
+  source "${__root}/main.sh" -3 arg3 -4 arg4 -5 arg5 -8 arg8 -d argd
+  for argument in ${!arg_*}; do info "${argument}: ${!argument}"; done
+)
+
+echo "# test for issue #108"
+(
+  source "${__root}/main.sh" -3 arg3 -5 arg5 -8 arg8 -d argd --four value --zero
+  for argument in ${!arg_*}; do info "${argument}: ${!argument}"; done
+)

test/scenario/megamount/run.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+__sysTmpDir="${TMPDIR:-/tmp}"
+__sysTmpDir="${__sysTmpDir%/}" # <-- remove trailing slash on macosx
+
+# Currently I only know how to test a failing condition here since
+# it's too invasive to create actual mounts to play with on a system
+
+bash "${__root}/src/megamount.sh" 'foobarfs://janedoe:abc123@192.168.0.1/documents' "${__sysTmpDir}/mnt/documents" || true
+
+# shellcheck source=src/megamount.sh
+source "${__root}/src/megamount.sh"
+
+megamount 'foobarfs://janedoe:abc123@192.168.0.1/documents' "${__sysTmpDir}/mnt/documents"

test/scenario/nocolor/run.sh

@@ -1,15 +0,0 @@
-#!/usr/bin/env bash
-set -o pipefail
-set -o errexit
-set -o nounset
-# set -o xtrace
-
-# Set magic variables for current FILE & DIR
-__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
-__base="$(basename ${__file} .sh)"
-__root="$(cd "$(dirname $(dirname $(dirname "${__dir}")))" && pwd)"
-
-echo "B3BP:STDIO_REPLACE_DATETIMES"
-
-env LOG_LEVEL=8 NO_COLOR=true bash "${__root}/main.sh" -f /tmp/x

test/scenario/parse_url/run.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+bash "${__root}/src/parse_url.sh" 'http://johndoe:abc123@example.com:8080/index.html' pass
+bash "${__root}/src/parse_url.sh" 'http://johndoe:abc123@example.com:8080/index.html'
+
+# shellcheck source=src/parse_url.sh
+source "${__root}/src/parse_url.sh"
+
+parse_url 'http://johndoe:abc123@example.com:8080/index.html' pass
+parse_url 'http://johndoe:abc123@example.com:8080/index.html'

test/scenario/templater/app.template.cfg

@@ -0,0 +1,2 @@
+[connection]
+host = ${TARGET_HOST}

test/scenario/templater/break.template.cfg

@@ -0,0 +1,3 @@
+[connection]
+host = ${TARGET_HOST}
+port = ${I_DONT_EXIST}

test/scenario/templater/run.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
+__base="$(basename "${__file}" .sh)"
+
+__root="$(cd "$(dirname "$(dirname "$(dirname "${__dir}")")")" && pwd)"
+
+__templaterTmpFile=$(mktemp "${TMPDIR:-/tmp}/${__base}.XXXXXX")
+function cleanup_before_exit () { rm "${__templaterTmpFile:?}"; }
+trap cleanup_before_exit EXIT
+
+echo "--"
+env TARGET_HOST="127.0.0.1" bash "${__root}/src/templater.sh" ./app.template.cfg "${__templaterTmpFile}"
+cat "${__templaterTmpFile}"
+
+echo "--"
+export TARGET_HOST="127.0.0.1"
+
+# shellcheck source=src/templater.sh
+source "${__root}/src/templater.sh"
+
+templater ./app.template.cfg "${__templaterTmpFile}"
+cat "${__templaterTmpFile}"
+
+echo "--"
+env ALLOW_REMAINDERS="1" TARGET_HOST="127.0.0.1" bash "${__root}/src/templater.sh" ./break.template.cfg "${__templaterTmpFile}"
+cat "${__templaterTmpFile}"
+
+echo "--"
+env TARGET_HOST="127.0.0.1" bash "${__root}/src/templater.sh" ./break.template.cfg "${__templaterTmpFile}"
+cat "${__templaterTmpFile}"

test/style.pl

@@ -0,0 +1,45 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+
+die "usage: $0 <file>\n" if (not @ARGV);
+
+my $rc = 0;
+my $file = shift;
+
+open(my $fh, '<', $file) or die "Cannot open \`$file' for read: $!\n";
+while (<$fh>) {
+  next if (/^\s*#/);
+
+  my $errors = 0;
+
+  # remove everything between single quotes
+  # this will remove too much in case of: echo "var='$var'"
+  # and thus miss an opportunity to complain later on
+  # also it mangles the input line irreversible
+  s/'[^']+'/'___'/g;
+
+  # highlight unbraced variables--
+  # unless properly backslash'ed
+  $errors += s/((?:^|[^\\]))(((\\\\)+)?\$\w)/$1\033[31m$2\033[0m/g;
+
+  # highlight single square brackets
+  $errors += s/((?:^|\s+))\[([^\[].+[^\]])\](\s*(;|&&|\|\|))/$1\033[31m\[\033[0m$2\033[31m\]\033[0m$3/g;
+
+  # highlight double equal sign
+  $errors += s/(\[\[.*)(==)(.*\]\])/$1\033[31m$2\033[0m$3/g;
+
+  # highlight tabs mixed with whitespace at beginning of lines
+  $errors += s/^( *)(\t+ *)/\033[31m\[$2\]\033[0m/;
+
+  # highlight trailing whitespace
+  $errors += s/([ \t]+)$/\033[31m\[$1\]\033[0m/;
+
+  next if (not $errors);
+  print "${file}[$.]: $_";
+  $rc = 1;
+}
+close($fh);
+
+exit $rc;