#!/bin/sh
#
# gitflow -- A collection of Git wrapper scripts 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
#

usage() {
	echo "usage: gitflow start feature [<options>] <name> [<base>]"
	echo "       gitflow finish feature [<options>] <name>"
	# TODO
	#echo ""
	#echo "options:"
	#echo "--option    Explanation"
	#echo ""
	#echo "start-only options:"
	#echo "--option    Explanation"
	#echo ""
	#echo "finish-only options:"
	#echo "--rebase    Rebases the feature branch on top of develop, instead of merging"
	#echo "--squash    Squashes all commits of the feature branch into a single commit"
	#echo "            on develop"
	#echo "--push      Push to the origin repo when finished"
}

parse_args() {
	FEATURE="$1"
    if [ $# -eq 2 ]; then
        BASE="$2"
    else
        BASE="develop"
    fi
	if [ "$FEATURE" = "" ]; then
		echo "Missing argument <release>"
		usage
		exit 1
	fi
}

start() {
	parse_args "$@"

	# Checks
	gitflow_check_clean_working_tree
	gitflow_require_branch_absent "$FEATURE"
	if [ "$BASE" = "develop" ]; then
		gitflow_require_branches_equal 'develop' 'origin/develop'
	fi

	# All checks passed, ready to roll
	git checkout -b "$FEATURE" "$BASE"

	echo ""
	echo "Summary of actions:"
	echo "- A new branch '$FEATURE' was created, based on '$BASE'"
	echo "- You are now on branch '$FEATURE'"
	echo ""
	echo "Now, start committing on your feature. When done, use:"
	echo ""
	echo "     gitflow finish feature '$FEATURE'"
}

finish() {
	parse_args "$@"

	# Checks
	gitflow_check_clean_working_tree
	gitflow_require_branch "$FEATURE"
	gitflow_require_branches_equal 'develop' 'origin/develop'

	# All checks passed, ready to roll
	git checkout develop

	# In case there has been only a single commit in the feature branch, don't
	# use --no-ff, since it has no extra advantages
	FF_FLAG="--no-ff"
	if [ "$(git rev-list develop.."$FEATURE" | wc -l)" -eq 1 ]; then
		FF_FLAG="--ff"
	fi
	git merge "$FF_FLAG" "$FEATURE"
	# TODO: How do we handle merge conflicts here??
	git branch -d "$FEATURE"

	echo ""
	echo "Summary of actions:"
	echo "- The feature branch '$FEATURE' was merged into 'develop'"
	#echo "- Merge conflicts were resolved"		# TODO: Add this line when it's supported
	echo "- Feature branch '$FEATURE' has been removed"
	echo "- You are now on branch 'develop'"
	echo ""
}