vim-pack-update

#! /usr/bin/env bash
###
# Test some variables for setting up options
###
supports_long_opts=false
getopt --test > /dev/null
if (( $? == 4 )); then
	supports_long_opts=true
fi

# Pull in code from parallel interface
my_dir="$(dirname "$(readlink "$0")")"
source "$my_dir/vim-pack-parallel"

###
# Prints the Usage message and exist return the first arg as return code
###
usage() {
	echo 'usage: vim-pack update [-s|--silent] [-d <dir>| --git-dir=<dir>]'
	echo
	echo 'options:'
	echo 'general options:'
	echo '    -d <dir> | --git-dir=<dir>'
	echo '        specify the name for the package directory by default it is'
	echo '        $HOME/.vim/pack/git-plugins'
	echo
	echo '    -h| --help'
	echo '        displays a really helpful message about how to use the program'
	echo
	echo '    -s| --silent'
	echo '        to hide output that normally goes to stdout'
	echo
	echo '    -v| --verbose'
	echo '        Prints out verbose output.'
	echo
	parallel_usage_options
	echo
	echo 'note:'
	echo '       long options are only available with systems that have an enhanced version'
	echo '       of getopt.'
	if [[ $supports_long_opts == true ]]; then
		echo '       this system does support long options'
	else
		echo '       this system does not support long options'
	fi
	parallel_usage_notes
	echo
	exit "$1"
}

# Repository Directory default location
repo_dir="$HOME/.vim/pack/git-plugins"

# silent is disabled by default
silent=false

# verbose is disabled by default
verbose=false

####
# This handles the optional arguments
###
SHORT="d:hsv$parallel_short_opts"
LONG="git-dir:,help,silent,verbose,$parallel_long_opts"
if [[ $supports_long_opts == true ]]; then
	if ! PARSED=$(getopt --options $SHORT --longoptions $LONG --name "$0" -- "$@"); then
		echo 'Failed to parse arguments'
		usage 1
	fi
else
	if ! PARSED=$(getopt --options $SHORT --name "$0" -- "$@"); then
		echo 'Failed to parse arguments'
		usage 1
	fi
fi

eval set -- "$PARSED"
while true; do
	parallel_parse_opt "$@"
	ret=$?
	if (( ret != 0 )); then
		shift $ret
		continue
	fi
	case "$1" in
		-h|--help)
			usage 0
			;;
		-d|--git-dir)
			repo_dir=$2
			shift 2
			;;
		-s|--silent)
			silent=true
			shift
			;;
		-v|--verbose)
			verbose=true
			shift
			;;
		--)
			shift
			break
			;;
	esac
done

update_count=$(( 0 ))
update_list=""
if [[ "$silent" == true ]]; then
	cmd='git -C "{}" fetch > /dev/null'
elif [[ "$verbose" == true ]]; then
	cmd='out=$(git -C "{}" fetch); echo -e "git -C "{}" fetch\nChecked {}$out"'
else
	cmd='out=$(git -C "{}" fetch); echo -e "Checked {}$out"'
fi
parallel_run "$cmd" $repo_dir/{opt,start}/*

# Don't know how to parallelize this but it takes very little time anyways so...
for i in {opt,start}; do
	for j in $repo_dir/$i/*; do
		_ahead=$(git -C "$j" rev-list "HEAD..@{u}" | wc -l)
		if (( _ahead > 0 )); then
			update_count=$(( update_count + 1 ))
			update_list="$update_list ${j#"$repo_dir/$i/"}"
		fi
	done
done

if (( update_count > 0 )); then
	echo 'Updates available for:'
	echo "  $update_list"
else
	echo 'No updates available'
fi
exit 0