mirror of
https://github.com/kvz/bash3boilerplate.git
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130 lines
4.8 KiB
Markdown
130 lines
4.8 KiB
Markdown
[](https://travis-ci.org/kvz/bash3boilerplate)
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When hacking up BASH scripts, I often find there are some
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higher level things like logging, configuration, command-line argument
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parsing that:
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- I need every time
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- Take quite some effort to get right
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- Keep you from your actual work
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Here's an attempt to bundle those things in a generalized way so that
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they are reusable as-is in most of my (and hopefully your, if not ping
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me) programs.
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## Goals
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Delete-key-friendly. I propose using `main.sh` as a base and removing the
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parts you don't need, rather than introducing a ton of packages, includes, compilers, etc.
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Aiming for portability, I'm targeting Bash 3 (OSX still ships
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with 3 for instance). If you're going to ask people to install
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Bash 4 first, you might as well pick a more advanced language as a
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dependency.
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We're automatically testing bash3boilerplate and it's proven to work on:
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- [Linux](https://travis-ci.org/kvz/bash3boilerplate/jobs/109804166#L91) `GNU bash, version 4.2.25(1)-release (x86_64-pc-linux-gnu)`
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- [OSX](https://travis-ci.org/kvz/bash3boilerplate/jobs/109804167#L2453) `GNU bash, version 3.2.51(1)-release (x86_64-apple-darwin13)`
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## Features
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- Structure
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- Safe defaults (break on error, pipefail, etc)
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- Configuration by environment variables
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- Configuration by command-line arguments (definitions parsed from help info,
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so no duplication needed)
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- Magic variables like `__file` and `__dir`
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- Logging that supports colors and is compatible with [Syslog Severity levels](http://en.wikipedia.org/wiki/Syslog#Severity_levels)
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## Installation
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There are 3 ways you can install (parts of) b3bp:
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1. Just get the main template: `wget https://raw.githubusercontent.com/kvz/bash3boilerplate/master/main.sh`
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2. Clone the entire project: `git clone git@github.com:kvz/bash3boilerplate.git`
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3. As of `v1.0.3`, b3bp can be installed as a `package.json` dependency via: `npm install --save bash3boilerplate`
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Although *3* introduces a node.js dependency, this does allow for easy version pinning and distribution 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.
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## Changelog
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### master (Unreleased)
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- Add Travis CI automated testing for OSX (thanks @zbeekman)
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### v1.2.0 (2016-02-16)
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- Allow disabling colors via `NO_COLOR` environment variable
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- Enable `errexit`, `nounset` and `pipefail` options at the top of the script already
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- More refined colors (thanks @arathai)
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- Add a changelog to the README
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- Add `__os` magic var (limited to discovering OSX and defaulting to Linux for now)
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- Add `__base` magic var (`main`, if the source script is `main.sh`)
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- Enable long, GNU style options (thanks @zbeekman)
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- Add Travis CI automated testing for Linux
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### v1.1.0 (2015-06-29)
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- Add `ALLOW_REMAINDERS` configuration to templater
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- Fix typo: 'debugmdoe' to 'debugmode' (thanks @jokajak)
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- Use `${BASH_SOURCE[0]}` for `__file` instead of `${0}`
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### v1.0.3 (2014-11-02)
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- Add `ini_val`, `megamount`, `parse_url`
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- Add re-usable libraries in `./src`
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- Use npm as an additional distribution channel
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## Best practices
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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.
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### Library exports
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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:
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```bash
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if [ "${BASH_SOURCE[0]}" != ${0} ]; then
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export -f my_script
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else
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my_script "${@}"
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exit $?
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fi
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```
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This allows a user to `source` your script or invoke as a script.
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```bash
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# Running as a script
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$ ./my_script.sh some args --blah
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# Sourcing the script
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$ source my_script.sh
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$ my_script some more args --blah
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```
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(taken from the [bpkg](https://raw.githubusercontent.com/bpkg/bpkg/master/README.md) project)
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## Todo
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- [ ] Make `src` libs adhere to Best practices
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- [ ] `make build` system for generating custom builds
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- [x] tests via Travis
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## Authors
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- Kevin van Zonneveld (<http://kvz.io>)
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- Izaak Beekman (<https://izaakbeekman.com/>)
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- Alexander Rathai (<Alexander.Rathai@gmail.com>)
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## Sponsoring
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<!-- badges/ -->
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[](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")
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<!-- /badges -->
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## License
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Copyright (c) 2013 Kevin van Zonneveld, [http://kvz.io](http://kvz.io)
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Licensed under MIT: [http://kvz.io/licenses/LICENSE-MIT](http://kvz.io/licenses/LICENSE-MIT)
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