#!/usr/bin/env docker -i

# Uncomment to debug:
#set -x

export NORAW=1

IMG=shykes/pybuilder:11d4f58638a72935

if [ $# -lt 3 ]; then
	echo "Usage: $0 build|run USER/REPO REV"
	echo "Example usage:"
	echo ""
	echo "		REV=7d5f035432fe1453eea389b0f1b02a2a93c8009e"
	echo "		$0 build shykes/helloflask \$REV"
	echo "		$0 run shykes/helloflask \$REV"
	echo ""
	exit 1
fi

CMD=$1

FORCE=0
if [ "$2" = "-f" ]; then
	FORCE=1
	shift
fi

REPO=$2
REV=$3

BUILD_IMAGE=builds/github.com/$REPO/$REV


if [ "$CMD" = "build" ]; then
	if [ ! -z "`images -q $BUILD_IMAGE`" ]; then
		if [ "$FORCE" -ne 1 ]; then
			echo "$BUILD_IMAGE already exists"
			exit
		fi
	fi

	# Allocate a TTY to work around python's aggressive buffering of stdout
	BUILD_JOB=`run -t $IMG /usr/local/bin/buildapp http://github.com/$REPO/archive/$REV.tar.gz`

	if [ -z "$BUILD_JOB" ]; then
		echo "Build failed"
		exit 1
	fi

	if attach $BUILD_JOB ; then
		BUILD_STATUS=`docker wait $BUILD_JOB`
		if [ -z "$BUILD_STATUS" -o "$BUILD_STATUS" != 0 ]; then
			echo "Build failed"
			exit 1
		fi

	else
		echo "Build failed"
		exit 1
	fi

	commit $BUILD_JOB $BUILD_IMAGE

	echo "Build saved at $BUILD_IMAGE"
elif [ "$CMD" = "run" ]; then
	RUN_JOB=`run $BUILD_IMAGE /usr/local/bin/runapp`
	if [ -z "$RUN_JOB" ]; then
		echo "Run failed"
		exit 1
	fi
	attach $RUN_JOB
fi