compile

#!/usr/bin/env bash
# bin/compile <build-dir> <cache-dir> <env-dir>

# Ensure wildcards in globs match dotfiles too.
shopt -s dotglob

BUILD_DIR=${1:-}
CACHE_DIR=${2:-}
ENV_DIR=${3:-}

if [ -f $ENV_DIR/PROJECT_PATH ]; then
	PROJECT_PATH=`cat $ENV_DIR/PROJECT_PATH`
	if [ -d $BUILD_DIR/$PROJECT_PATH ]; then
		echo "-----> Subdir buildpack in $PROJECT_PATH"

		if [ -n "$(ls -A $BUILD_DIR/.profile.d 2>/dev/null)" ]; then
			echo "       Another buildpack seems to have run"
			echo "       before the subdir buildpack. This"
			echo "       may cause unexpected problems."
			echo ""
			echo "       Ensure '$ heroku buildpacks' lists"
			echo "       the subdir buildpack first and try"
			echo "       again."
			exit 1
		fi

		echo "       creating cache: $CACHE_DIR"
		mkdir -p $CACHE_DIR
		TMP_DIR=`mktemp -d $CACHE_DIR/subdirXXXXX`
		echo "       created tmp dir: $TMP_DIR"
		echo "       moving working dir: $PROJECT_PATH to $TMP_DIR"
		cp -R $BUILD_DIR/$PROJECT_PATH/. $TMP_DIR/
	 	echo "       cleaning build dir $BUILD_DIR"
		rm -rf $BUILD_DIR/*
		echo "       copying preserved work dir from cache $TMP_DIR to build dir $BUILD_DIR"
		cp -R $TMP_DIR/. $BUILD_DIR/
		echo "       cleaning tmp dir $TMP_DIR"
		rm -rf $TMP_DIR
		exit 0
	fi
fi

echo "PROJECT_PATH is undefined"
exit 1