verify-oss-formula-uptodate

#!/bin/bash
set -e

SELFDIR=$(dirname "$0")
SELFDIR=$(cd "$SELFDIR" && pwd)
# shellcheck source=lib/functions.sh
source "$SELFDIR/lib/functions.sh"

CORE_GIT_REPO_CACHE=
CORE_GIT_REMOTE=origin

function usage()
{
	echo "Usage: ./verify-oss-formula-uptodate OPTIONS..."
	echo "Verify whether the open source formula is still up-to-date compared to the one in Homebrew-core."
	echo
	echo "Optional options:"
	echo "  -c PATH    Path to local Homebrew-core git repo cache"
	echo "  -r NAME    Remote name in git repo cache. Default: origin"
	echo "  -h         Show usage"
}

function parse_options()
{
	local OPTIND=1
	local opt
	while getopts "c:r:h" opt; do
		case "$opt" in
		c)
			CORE_GIT_REPO_CACHE="$OPTARG"
			;;
		r)
			CORE_GIT_REMOTE="$OPTARG"
			;;
		h)
			usage
			exit
			;;
		*)
			return 1
			;;
		esac
	done

	(( OPTIND -= 1 )) || true
	shift $OPTIND || true
}

parse_options "$@"

if [[ "$CORE_GIT_REPO_CACHE" = "" ]]; then
	TEMP_DIR=$(mktemp -d /tmp/verify-oss-formula-uptodate.XXXXXX)

	function _cleanup()
	{
		run rm -rf "$TEMP_DIR"
	}

	echo "*** HINT: cloning homebrew-core takes a while. To speed up this operation next time, use specify a cache using -c and -r."
	echo "+ Created temp dir $TEMP_DIR"
	run git clone --bare https://github.com/Homebrew/homebrew-core.git "$TEMP_DIR/repo"
	echo "+ Changing directory to: $TEMP_DIR/repo"
	cd "$TEMP_DIR/repo"
	echo "+ git log -n 1 --format=%ad master -- Formula/passenger.rb"
	CORE_DATE=$(git log -n 1 --format=%ad master -- Formula/passenger.rb)
else
	if [[ -e "$CORE_GIT_REPO_CACHE" ]]; then
		echo "+ Changing directory to: $CORE_GIT_REPO_CACHE"
		cd "$CORE_GIT_REPO_CACHE"
		run git fetch "$CORE_GIT_REMOTE"
	else
		run git clone --bare https://github.com/Homebrew/homebrew-core.git "$CORE_GIT_REPO_CACHE"
		echo "+ Changing directory to: $CORE_GIT_REPO_CACHE"
		cd "$CORE_GIT_REPO_CACHE"
		if [[ "$CORE_GIT_REMOTE" != origin ]]; then
			run git remote add "$CORE_GIT_REMOTE" https://github.com/Homebrew/homebrew-core.git
			run git fetch "$CORE_GIT_REMOTE"
		fi
	fi
	echo "+ git log -n 1 --format=%ad $CORE_GIT_REMOTE/master -- Formula/passenger.rb"
	CORE_DATE=$(git log -n 1 --format="%ad" "$CORE_GIT_REMOTE/master" -- Formula/passenger.rb)
fi
CORE_TIMESTAMP=$(ruby -rtime -e 'puts Time.parse(ARGV[0]).to_i' "$CORE_DATE")
echo "Homebrew-core's timestamp: $CORE_DATE => $CORE_TIMESTAMP"

echo
echo "+ Changing directory: $SELFDIR"
cd "$SELFDIR"
echo "+ Running: git log -n 1 --format=%ad -- Formula/passenger.rb"
OUR_DATE=$(git log -n 1 --format=%ad -- Formula/passenger.rb)
OUR_TIMESTAMP=$(ruby -rtime -e 'puts Time.parse(ARGV[0]).to_i' "$OUR_DATE")
echo "Our timestamp: $OUR_DATE => $OUR_TIMESTAMP"

echo
if [[ "$OUR_TIMESTAMP" -ge "$CORE_TIMESTAMP" ]] && [[ "$OUR_CONTENT" = "$CORE_CONTENT" ]]; then
	echo "Our formula is sufficiently up-to-date compared to the one in the Homebrew official core tap."
else
	echo "ERROR: our formula is outdated. There is a newer one in the Homebrew official core tap. Please merge over the changes."
	exit 1
fi