Add test for --source flag and pull request suggestions

Add a demo/sourcing.vars file to be used by the associated demo
script.

Modified mo argument parsing so that --help and --source=file do not need
to be the first arguments for mo. And can in fact appear after or in the
middle of filenames.

.gitignore

@@ -4,4 +4,3 @@ diagnostic.test
 tests/*.diff
 spec/
 spec-runner/
-demo/sourcing.vars

demo/sourcing

@@ -4,11 +4,6 @@
 
 cd "$(dirname "$0")" # Go to the script's directory
 
-cat <<EOF >sourcing.vars
-export NAME="Alex"
-export ARRAY=( AAA BBB CCC )
-EOF
-
 cat <<EOF | ../mo --source=sourcing.vars
 Hello, my name is {{NAME}}.
 And this is ARRAY's conntents:

demo/sourcing.vars

@@ -0,0 +1,2 @@
+export NAME="Alex"
+export ARRAY=( AAA BBB CCC )

mo

@@ -29,25 +29,38 @@
 mo() (
     # This function executes in a subshell so IFS is reset.
     # Namespace this variable so we don't conflict with desired values.
-    local moContent
+    local moContent files=()
 
     IFS=$' \n\t'
 
     if [[ $# -gt 0 ]]; then
-        case "$1" in
+        for arg in "$@"; do
+            case "$arg" in
                 -h|--h|--he|--hel|--help)
                     moUsage "$0"
                     exit 0
                     ;;
 
                 --source=*)
-                . "${1#--source=}"
-                shift 1
+                    local f2source="${1#--source=}"
+                    if [[ -f "$f2source" ]]; then
+                        . "$f2source"
+                        continue
+                    else
+                        printf "%s: %s: %s\n"\
+                               "$0" "$f2source" "No such file" >&2
+                        exit 1
+                    fi
+                    ;;
+
+                *) # Every arg that is not a flag or a option should be a file
+                    files+=("$arg")
                     ;;
             esac
+        done
     fi
 
-    moGetContent moContent "$@"
+    moGetContent moContent "${files[@]}"
     moParse "$moContent" "" true
 )
 

tests/source.expected

@@ -0,0 +1,5 @@
+value
+* 1
+* 2
+* 3
+AAA BBB

tests/source.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+cd "${0%/*}"
+cat <<EOF | ../mo --source=source.vars
+{{VAR}}
+{{#ARR}}
+* {{.}}
+{{/ARR}}
+{{ASSOC_ARR.a}} {{ASSOC_ARR.b}}
+EOF
+
+
+# Prints the string should mo NOT fail. Meaning that the output will not match
+# tests/source.expected and therefore the test will fail.
+
+../mo --source=a/non/existent/file files >/dev/null 2>&1
+[[ "$?" -ne 1 ]] && echo "mo accepted a non existent file"

tests/source.vars

@@ -0,0 +1,4 @@
+export VAR=value
+export ARR=(1 2 3)
+declare -A ASSOC_ARR
+export ASSOC_ARR=([a]=AAA [b]=BBB)