#!/bin/bash
set -e

DEST=$1

# subshell so that we can export PATH without breaking other things
(
	source "$(dirname "$BASH_SOURCE")/.integration-daemon-start"

	# we need to wrap up everything in between integration-daemon-start and
	# integration-daemon-stop to make sure we kill the daemon and don't hang,
	# even and especially on test failures
	didFail=
	if ! {
		set -e

		# TODO consider using frozen images for the dockercore/builder-deb tags

		debVersion="${VERSION//-/'~'}"
		# if we have a "-dev" suffix or have change in Git, let's make this package version more complex so it works better
		if [[ "$VERSION" == *-dev ]] || [ -n "$(git status --porcelain)" ]; then
			gitUnix="$(git log -1 --pretty='%at')"
			gitDate="$(date --date "@$gitUnix" +'%Y%m%d.%H%M%S')"
			gitCommit="$(git log -1 --pretty='%h')"
			gitVersion="git${gitDate}.0.${gitCommit}"
			# gitVersion is now something like 'git20150128.112847.0.17e840a'
			debVersion="$debVersion~$gitVersion"

			# $ dpkg --compare-versions 1.5.0 gt 1.5.0~rc1 && echo true || echo false
			# true
			# $ dpkg --compare-versions 1.5.0~rc1 gt 1.5.0~git20150128.112847.17e840a && echo true || echo false
			# true
			# $ dpkg --compare-versions 1.5.0~git20150128.112847.17e840a gt 1.5.0~dev~git20150128.112847.17e840a && echo true || echo false
			# true

			# ie, 1.5.0 > 1.5.0~rc1 > 1.5.0~git20150128.112847.17e840a > 1.5.0~dev~git20150128.112847.17e840a
		fi

		debSource="$(awk -F ': ' '$1 == "Source" { print $2; exit }' hack/make/.build-deb/control)"
		debMaintainer="$(awk -F ': ' '$1 == "Maintainer" { print $2; exit }' hack/make/.build-deb/control)"
		debDate="$(date --rfc-2822)"

		# if go-md2man is available, pre-generate the man pages
		./docs/man/md2man-all.sh -q || true
		# TODO decide if it's worth getting go-md2man in _each_ builder environment to avoid this

		# TODO add a configurable knob for _which_ debs to build so we don't have to modify the file or build all of them every time we need to test
		for dir in contrib/builder/deb/*/; do
			version="$(basename "$dir")"
			suite="${version##*-}"

			image="dockercore/builder-deb:$version"
			if ! docker inspect "$image" &> /dev/null; then
				( set -x && docker build -t "$image" "$dir" )
			fi

			mkdir -p "$DEST/$version"
			cat > "$DEST/$version/Dockerfile.build" <<-EOF
				FROM $image
				WORKDIR /usr/src/docker
				COPY . /usr/src/docker
				RUN ln -sfv hack/make/.build-deb debian
				RUN { echo '$debSource (${debVersion}-0~${suite}) $suite; urgency=low'; echo; echo '  * Version: $VERSION'; echo; echo " -- $debMaintainer  $debDate"; } > debian/changelog && cat >&2 debian/changelog
				RUN dpkg-buildpackage -uc -us
			EOF
			cp -a "$DEST/$version/Dockerfile.build" . # can't use $DEST because it's in .dockerignore...
			tempImage="docker-temp/build-deb:$version"
			( set -x && docker build -t "$tempImage" -f Dockerfile.build . )
			docker run --rm "$tempImage" bash -c 'cd .. && tar -c *_*' | tar -xvC "$DEST/$version"
			docker rmi "$tempImage"
		done
	}; then
		didFail=1
	fi

	# clean up after ourselves
	rm -f Dockerfile.build

	source "$(dirname "$BASH_SOURCE")/.integration-daemon-stop"

	[ -z "$didFail" ] # "set -e" ftw
) 2>&1 | tee -a $DEST/test.log