#!/bin/bash

LOG_FILE="../merge.log"
build_host="sprygo"
build_dir="/scratch/sfr/next"
build_cmd="bin/build_next"

no_build=false
[ "$1" = "-n" ] && {
	shift
	no_build=true
}

tree=$1
ver=$2

rev=$(git rev-parse -verify "next-$ver/$tree")
[ "$rev" ] || {
	echo "No such tree/date" 1>&2
	exit 1
}

[ -n "$3" ] && build_host="$3"

log()
{
	echo "$@" | tee -a $LOG_FILE
}

execute()
{
	log "$" $@
	$@ 2>&1 | tee -a $LOG_FILE
	return ${PIPESTATUS[0]}
}

GIT_EDITOR=: execute git reset --hard 'HEAD^' || {
	echo "git reset failed" 1>&2
	bash -i || exit
}

log Merging "next-$ver/$tree"
execute git merge "next-$ver/$tree" || {
	echo Merge failed 1>&2
	bash -i || exit
	GIT_EDITOR=: execute git commit -v -a
	execute git diff -M --stat --summary 'HEAD^..'
}

$no_build && exit 0

rsync -avH --exclude .git --delete . "$build_host":"$build_dir"/. || {
	echo Rsync failed 1>&2
	bash -i || exit
}

echo "Building using $build_cmd on $build_host"
ssh "$build_host" "$build_cmd" || {
	echo Build failed 1>&2
	bash -i || exit
}

d=$(date --date "5 hours ago" '+%Y%m%d')
git update-ref "refs/heads/next-$d/broken/$tree" "refs/heads/next-$d/$tree"
git update-ref "refs/heads/next-$d/$tree" "refs/heads/next-$ver/$tree"

exit 0