#!/bin/sh
#
# Copyright (c) 2008 Stephen Haberman
#
# This hook creates new jobs for each branch in the Hudson continuous
# integration tool. Besides creating the job if needed, the user who pushed is
# added to the job's email list if they were not already there.
#
# Config
# ------
# hooks.post-receive-hudson.url
#   The url to hudson, e.g. http://internalbox/hudson
# hooks.post-receive-hudson.ignored
#   Whitespace separated list of branches to not make jobs for.
# USER_EMAIL
#   Environment variable that should be set by your repository-specific
#   post-receive hook. E.g. export USER_EMAIL=${USER}@example.com
#

. $(dirname $0)/functions

while read oldrev newrev refname ; do
	case "$refname" in
		refs/tags/*)
			exit 0
			;;
		refs/heads/*)
			short_refname=${refname##refs/heads/}
			;;
		*)
			echo >&2 "*** Unknown type of update to $refname"
			exit 1
			;;
	esac

	ignored=" $(git config hooks.post-receive-hudson.ignored) "
	hudson_url=$(git config hooks.post-receive-hudson.url)
	if [[ $ignored =~ " $short_refname " ]] ; then
		exit 0
	fi

	branch_config=$(wget -O - $hudson_url/job/${short_refname}/config.xml 2>/dev/null)
	if [ $? -ne 0 ] ; then
		# Create the job
		stable_config=$(wget -O - $hudson_url/job/stable/config.xml 2>/dev/null)
		if [ $? -ne 0 ] ; then
			display_error_message "Could not get existing Hudson config for ${short_refname}"
			exit 0
		fi

		# Replace stable with our branch
		branch_config="${stable_config/<branch>stable</<branch>$short_refname<}"

		# Add email to recipients list
		if [ "${branch_config/$USER_EMAIL/}" == "$branch_config" ] ; then
			branch_config="${branch_config/<recipients>/<recipients>$USER_EMAIL }"
		fi

		# Make the new job
		wget --header "Content-Type: text/xml" --post-data="$branch_config" -O - "$hudson_url/createItem?name=${short_refname}" >/dev/null 2>/dev/null
		if [ $? -ne 0 ] ; then
			display_error_message "Could not create new Hudson job for ${short_refname}"
			exit 0
		fi
	else
		# Add email to recipients list
		if [ "${branch_config/$USER_EMAIL/}" == "$branch_config" ] ; then
			branch_config="${branch_config/<recipients>/<recipients>$USER_EMAIL }"

			# Update the config
			wget --header "Content-Type: text/xml" --post-data="$branch_config" -O - "$hudson_url/job/${short_refname}/config.xml" >/dev/null 2>/dev/null
			if [ $? -ne 0 ] ; then
				display_error_message "Could not add $USER_EMAIL to Hudson job ${short_refname}"
				exit 0
			fi
		fi
	fi
done

exit 0