Add version positional argument to nodejs-tarball.sh

Uses argbash to generate argument handling.

Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>

nodejs-tarball.sh

@@ -1,6 +1,115 @@
 #!/bin/sh
+# Uses Argbash to generate command argument parsing. To update
+# arguments, make sure to call
+# `argbash nodejs-tarball.sh -o nodejs-tarball.sh`
 
+# ARG_POSITIONAL_SINGLE([version],[Node.js release version],[""])
+# ARG_DEFAULTS_POS([])
+# ARG_HELP([Tool to aid in Node.js packaging of new releases])
+# ARGBASH_GO()
+# needed because of Argbash --> m4_ignore([
+### START OF CODE GENERATED BY Argbash v2.8.1 one line above ###
+# Argbash is a bash code generator used to get arguments parsing right.
+# Argbash is FREE SOFTWARE, see https://argbash.io for more info
+
+
+die()
+{
+	local _ret=$2
+	test -n "$_ret" || _ret=1
+	test "$_PRINT_HELP" = yes && print_help >&2
+	echo "$1" >&2
+	exit ${_ret}
+}
+
+
+begins_with_short_option()
+{
+	local first_option all_short_options='h'
+	first_option="${1:0:1}"
+	test "$all_short_options" = "${all_short_options/$first_option/}" && return 1 || return 0
+}
+
+# THE DEFAULTS INITIALIZATION - POSITIONALS
+_positionals=()
+_arg_version=""
+# THE DEFAULTS INITIALIZATION - OPTIONALS
+
+
+print_help()
+{
+	printf '%s\n' "Tool to aid in Node.js packaging of new releases"
+	printf 'Usage: %s [-h|--help] [<version>]\n' "$0"
+	printf '\t%s\n' "<version>: Node.js release version (default: '""')"
+	printf '\t%s\n' "-h, --help: Prints help"
+}
+
+
+parse_commandline()
+{
+	_positionals_count=0
+	while test $# -gt 0
+	do
+		_key="$1"
+		case "$_key" in
+			-h|--help)
+				print_help
+				exit 0
+				;;
+			-h*)
+				print_help
+				exit 0
+				;;
+			*)
+				_last_positional="$1"
+				_positionals+=("$_last_positional")
+				_positionals_count=$((_positionals_count + 1))
+				;;
+		esac
+		shift
+	done
+}
+
+
+handle_passed_args_count()
+{
+	test "${_positionals_count}" -le 1 || _PRINT_HELP=yes die "FATAL ERROR: There were spurious positional arguments --- we expect between 0 and 1, but got ${_positionals_count} (the last one was: '${_last_positional}')." 1
+}
+
+
+assign_positional_args()
+{
+	local _positional_name _shift_for=$1
+	_positional_names="_arg_version "
+
+	shift "$_shift_for"
+	for _positional_name in ${_positional_names}
+	do
+		test $# -gt 0 || break
+		eval "$_positional_name=\${1}" || die "Error during argument parsing, possibly an Argbash bug." 1
+		shift
+	done
+}
+
+parse_commandline "$@"
+handle_passed_args_count
+assign_positional_args 1 "${_positionals[@]}"
+
+# OTHER STUFF GENERATED BY Argbash
+
+### END OF CODE GENERATED BY Argbash (sortof) ### ])
+# [ <-- needed because of Argbash
+
+
+
+echo $_arg_version
+
+if [ x$_arg_version != x ]; then
+    version=$_arg_version
+else
     version=$(rpm -q --specfile --qf='%{version}\n' nodejs.spec | head -n1)
+fi
+
 rm -f node-v${version}.tar.gz node-v${version}-stripped.tar.gz
 wget http://nodejs.org/dist/v${version}/node-v${version}.tar.gz
 tar -zxf node-v${version}.tar.gz
@@ -10,3 +119,5 @@ tar -zcf node-v${version}-stripped.tar.gz node-v${version}
 fedpkg new-sources node-v${version}-stripped.tar.gz
 
 rm -f node-v${version}.tar.gz
+
+# ] <-- needed because of Argbash