#!/usr/bin/env bash

set -e -o pipefail

if [[ -z "$VALIDATE_UPSTREAM" ]]; then
	# this is kind of an expensive check, so let's not do this twice if we
	# are running more than one validate bundlescript

	VALIDATE_REPO='https://github.com/docker/docker.git'
	VALIDATE_BRANCH='master'

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

	git fetch -q "$VALIDATE_REPO" "refs/heads/$VALIDATE_BRANCH"
	VALIDATE_UPSTREAM="$(git rev-parse --verify FETCH_HEAD)"

	VALIDATE_COMMIT_LOG="$VALIDATE_UPSTREAM..$VALIDATE_HEAD"
	VALIDATE_COMMIT_DIFF="$VALIDATE_UPSTREAM...$VALIDATE_HEAD"

	validate_diff() {
		if [[ "$VALIDATE_UPSTREAM" != "$VALIDATE_HEAD" ]]; then
			git diff "$VALIDATE_COMMIT_DIFF" "$@"
		fi
	}
	validate_log() {
		if [[ "$VALIDATE_UPSTREAM" != "$VALIDATE_HEAD" ]]; then
			git log "$VALIDATE_COMMIT_LOG" "$@"
		fi
	}
fi