#!/bin/bash
set -e

cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"

repos=( --all )

upstreamRepo='docker-library/official-images'
upstreamBranch='master'
if [ "$TRAVIS_PULL_REQUEST" -a "$TRAVIS_PULL_REQUEST" != 'false' ]; then
	upstreamRepo="$TRAVIS_REPO_SLUG"
	upstreamBranch="$TRAVIS_BRANCH"
fi

HEAD="$(git rev-parse --verify HEAD)"

git fetch -q "https://github.com/$upstreamRepo.git" "refs/heads/$upstreamBranch"
UPSTREAM="$(git rev-parse --verify FETCH_HEAD)"

if [ "$(git diff --numstat "$UPSTREAM...$HEAD" -- . | wc -l)" -ne 0 ]; then
	# changes in bashbrew/ -- keep "--all" so we test the bashbrew script changes appropriately
	echo >&2 'Changes in bashbrew/ detected!'
else
	repos=( $(git diff --numstat "$UPSTREAM...$HEAD" -- ../library | awk -F '/' '{ print $2 }') )
fi

if [ "${#repos[@]}" -eq 0 ]; then
	echo >&2 'Skipping test builds: no changes to library/ or bashbrew/ in PR'
	exit
fi

# --no-build because we has no Docker in Travis :)
# TODO that will change eventually!

set -x
./bashbrew.sh list --namespaces='_' "${repos[@]}"
./bashbrew.sh build --no-build "${repos[@]}"
./bashbrew.sh push --no-push "${repos[@]}"