#
# git-flow -- A collection of Git extensions to provide high-level
# repository operations for Vincent Driessen's branching model.
#
# Original blog post presenting this model is found at:
#    http://nvie.com/archives/323
#
# Feel free to contribute to this project at:
#    http://github.com/nvie/gitflow
#
# Copyright (c) 2010 by Vincent Driessen
# Copyright (c) 2010 by Benedikt Böhm
#

VERSION_PREFIX=$(git config --get gitflow.prefix.versiontag)
PREFIX=$(git config --get gitflow.prefix.support || echo support/)
FLAG_FETCH=1

usage() {
	echo "usage: git flow support [list]"
	echo "       git flow support start <version> [<base>]"
}

cmd_default() {
	cmd_list "$@"
}

cmd_list() {
	SUPPORT_BRANCHES="$(echo "$LOCAL_BRANCHES" | grep "^$PREFIX")"
	if [ -z "$SUPPORT_BRANCHES" ]; then
		warn "No support branches exist."
		exit 0
	fi
	echo "$SUPPORT_BRANCHES" | sed "s?^$PREFIX??g"
}

cmd_help() {
	usage
	exit 0
}

parse_args() {
	# TODO: When we have a nice structured way of parsing flags with getopt,
	# implement the following flags:
	# --fetch, to set FLAG_FETCH=1
	# --no-fetch, to set FLAG_FETCH=0
	VERSION="$1"
	BASE="${2:-${VERSION_PREFIX}${VERSION}}"
	if [ "$VERSION" = "" ]; then
		echo "Missing argument <version>."
		usage
		exit 1
	fi
	BRANCH=$PREFIX$VERSION
}

cmd_start() {
	parse_args "$@"

	# sanity checks
	gitflow_require_clean_working_tree

	# fetch remote changes
	if [ $FLAG_FETCH -eq 1 ]; then
		git fetch -q $ORIGIN $BASE
	fi
	gitflow_require_branches_equal $BRANCH $ORIGIN/$BRANCH

	# create branch
	git checkout -b $BRANCH $BASE

	# publish branch
	git push $ORIGIN $BRANCH:refs/heads/$BRANCH

	git config branch.$BRANCH.remote $ORIGIN
	git config branch.$BRANCH.merge refs/heads/$BRANCH
	git checkout $BRANCH

	echo
	echo "Summary of actions:"
	echo "- A new remote branch '$BRANCH' was created, based on '$BASE'"
	echo "- A new tracking branch '$BRANCH' was created"
	echo "- You are now on branch '$BRANCH'"
	echo
}