#!/bin/bash

set -e
. /nail/workflow/pushlib.sh

usage() {
	echo "$0 <branch1> <branch2> ..."
	exit 1
}

main() {
	BRANCH_NAMES=${@:1}
	BRANCH_BASE="origin/master"
	TARGET="$(git-branch-name)"

	colorize git fetch origin
	colorize git reset --hard $BRANCH_BASE
	merge-branches $TARGET $BRANCH_NAMES
	separator
	list-pushplans $TARGET $BRANCH_BASE
}

merge-branches() {
	DEPLOY=$1
	BRANCH_NAMES=${@:2}

	for BRANCH_NAME in $BRANCH_NAMES
	do
		separator
		if ! colorize git merge --no-ff --no-commit "origin/$BRANCH_NAME"; then
			echo -e "${RED}Unable to merge $BRANCH_NAME.${NORMAL}"
			git diff
			reset_branch_and_abort $DEPLOY
		fi
		git merge --abort

		colorize git merge --no-ff "origin/$BRANCH_NAME"
	done
}

list-pushplans() {
	TARGET=$1
	BASE=$2

	echo -e "${PURPLE}Pushplans present in this deploy:${NORMAL}"
	git diff --name-only "$(git merge-base "$TARGET" "$BASE")..$TARGET" -- pushplans
}

reset-branch-and-abort() {
	RESET_TARGET=$1
	RESET_SHA="$(git rev-parse "$RESET_TARGET")"

	separator
	git reset --hard "$RESET_SHA"
	make clean
	separator
	echo -e "Aborted."
	exit 1
}

main $@