#!/bin/sh

set -o errexit
set -o nounset
IFS=' 	
'

if test "${IS_TEST_CASE:-1}" -eq '1'
then
	DIR_TESTCASES="$(cd -- "$(dirname -- "$0")" && pwd -P)"
	DIR_TEST="$(dirname "${DIR_TESTCASES}")"
else
	DIR_TEST="$(cd -- "$(dirname -- "$0")" && pwd -P)"
	DIR_TESTCASES="${DIR_TEST}/tests"
fi
DIR_ROOT="$(dirname "${DIR_TEST}")"
DIR_BIN="${DIR_ROOT}/bin"
DIR_TEMP="${DIR_TEST}/temp"
DIR_SOURCE="${DIR_TEMP}/source"
DIR_DESTINATION="${DIR_TEMP}/destination"

BIN_MAIN="${DIR_BIN}/incremental-git-filterbranch"
if test ! -f "${BIN_MAIN}"
then
	echo 'Failed to detect environment'>&2
	exit 1
fi

BIN_MAIN_OPTIONS=''
if ! command -v flock >/dev/null
then
	BIN_MAIN_OPTIONS="${BIN_MAIN_OPTIONS} --no-lock"
fi

initializeRepositories () {
	rm -rf "${DIR_TEMP}"
	mkdir "${DIR_TEMP}"

	git init --quiet "${DIR_SOURCE}"
	git -C "${DIR_SOURCE}" config --local user.email 'email@example.com'
	git -C "${DIR_SOURCE}" config --local user.name 'John Doe'
	mkdir "${DIR_SOURCE}/subdir"

	touch "${DIR_SOURCE}/rootfile1"
	git -C "${DIR_SOURCE}" add --all
	git -C "${DIR_SOURCE}" commit --quiet --message 'Commit #1'

	git -C "${DIR_SOURCE}" tag tag-01

	touch "${DIR_SOURCE}/subdir/subfile1"
	git -C "${DIR_SOURCE}" add --all
	git -C "${DIR_SOURCE}" commit --quiet --message 'Commit #2'

	touch "${DIR_SOURCE}/subdir/subfile2"
	git -C "${DIR_SOURCE}" add --all
	git -C "${DIR_SOURCE}" commit --quiet --message 'Commit #3'

	git -C "${DIR_SOURCE}" tag tag-02

	touch "${DIR_SOURCE}/subdir/subfile3"
	git -C "${DIR_SOURCE}" add --all
	git -C "${DIR_SOURCE}" commit --quiet --message 'Commit #4'

	touch "${DIR_SOURCE}/rootfile2"
	git -C "${DIR_SOURCE}" add --all
	git -C "${DIR_SOURCE}" commit --quiet --message 'Commit #5'

	git -C "${DIR_SOURCE}" tag tag-03
	
	touch "${DIR_SOURCE}/rootfile3"
	git -C "${DIR_SOURCE}" add --all
	git -C "${DIR_SOURCE}" commit --quiet --message 'Commit #6'

	touch "${DIR_SOURCE}/subdir/subfile3b"
	git -C "${DIR_SOURCE}" add --all
	git -C "${DIR_SOURCE}" commit --quiet --message 'Commit #4b'

	git  -C "${DIR_SOURCE}" checkout --quiet -b slave tag-02

	touch "${DIR_SOURCE}/in-root-2"
	git -C "${DIR_SOURCE}" add --all
	git -C "${DIR_SOURCE}" commit --quiet --message 'Commit #7'

	git -C "${DIR_SOURCE}" tag tag-04

	touch "${DIR_SOURCE}/in-root-3"
	git -C "${DIR_SOURCE}" add --all
	git -C "${DIR_SOURCE}" commit --quiet --message 'Commit #8'

	git init --bare --quiet "${DIR_DESTINATION}"
}

getTagList () {
	getTagList_multiline=$(git -C "${1}" show-ref --tags | sed -E 's:^.* refs/tags/::' || true)
	printf '%s' "${getTagList_multiline}" | sort -b | tr '\n' ' ' | sed -E 's:^ | $::g'
}

getBranchList () {
	getBranchList_multiline=$(git -C "${1}" show-ref --heads | sed -E 's:^.* refs/heads/::' || true)
	printf '%s' "${getBranchList_multiline}" | sort -b | tr '\n' ' ' | sed -E 's:^ | $::g'
}