#!/bin/bash

abort() {
	echo ${1:-'archrelease: Cancelled'}
	exit 1
}

if [[ -z $1 ]]; then
	abort 'Usage: archrelease <repo>...'
fi

# TODO: validate repo is really repo-arch

if [[ ! -f PKGBUILD ]]; then
	abort 'archrelease: PKGBUILD not found'
fi

trunk=${PWD##*/}

# Normally this should be trunk, but it may be something
# such as 'gnome-unstable'
IFS='/' read -r -d '' -a parts <<< "$PWD"
if [[ "${parts[@]:(-2):1}" == "repos" ]]; then
	abort 'archrelease: Should not be in repos dir (try from trunk/)'
fi
unset parts

if [[ $(svn status -q) ]]; then
	abort 'archrelease: You have not committed your changes yet!'
fi

pushd .. >/dev/null
IFS=$'\n' read -r -d '' -a known_files < <(svn ls -r HEAD "$trunk")
for file in "${known_files[@]}"; do
	if [[ ${file:(-1)} = '/' ]]; then
		abort "archrelease: subdirectories are not supported in package directories!"
	fi
done

for tag in "$@"; do
	echo -n "copying ${trunk} to ${tag}..."

	if [[ -d repos/$tag ]]; then
		declare -a trash
		trash=()
		while read -r file; do
			trash+=("repos/$tag/$file")
		done < <(svn ls "repos/$tag")
		svn rm -q "${trash[@]}"
	else
		mkdir -p "repos/$tag"
		svn add --parents -q "repos/$tag"
	fi

	for file in "${known_files[@]}"; do
		svn copy -q -r HEAD "$trunk/$file" "repos/$tag/"
	done

	echo 'done'
done

echo -n "releasing package..."
printf -v tag_list ", %s" "$@"; tag_list="${tag_list#, }"
svn commit -q -m "archrelease: copy ${trunk} to $tag_list" || abort
echo 'done'

popd >/dev/null