#!/usr/bin/env bash

set -e

if [ "$1" == "" -o "$2" == "" ]; then

	echo "usage: $0 crlfrepo directory [tempdir]"

	exit 1

fi

input=$1

output=$2

tempdir=$3

set -u

create_repo() {

	local input=$1

	local output=$2

	local tempdir=$3

	local systype=$4

	local autocrlf=$5

	local attr=$6

	local worktree="${output}/${systype}/autocrlf_${autocrlf}"

	if [ "$attr" != "" ]; then

		local attrdir=`echo $attr | sed -e "s/ /,/g" | sed -e "s/=/_/g"`

		worktree="${worktree},${attrdir}"

	fi

	if [ "$tempdir" = "" ]; then

		local gitdir="${worktree}/.git"

	else

		local gitdir="${tempdir}/generate_crlf_${RANDOM}"

	fi

	echo "Creating ${worktree}"

	mkdir -p "${worktree}"

	git clone --no-checkout --quiet --bare "${input}/.gitted" "${gitdir}"

	git --work-tree="${worktree}" --git-dir="${gitdir}" config core.autocrlf ${autocrlf}

	if [ "$attr" != "" ]; then

		echo "* ${attr}" >> "${worktree}/.gitattributes"

	fi

	git --work-tree="${worktree}" --git-dir="${gitdir}" checkout HEAD

	if [ "$attr" != "" ]; then

		rm "${worktree}/.gitattributes"

	fi

	if [ "$tempdir" != "" ]; then

		rm -rf "${gitdir}"

	fi

}

if [[ `uname -s` == MINGW* ]]; then

	systype="windows"

else

	systype="posix"

fi

for autocrlf in true false input; do

	for attr in "" text text=auto -text crlf -crlf eol=lf eol=crlf \

		"text eol=lf" "text eol=crlf" \

		"text=auto eol=lf" "text=auto eol=crlf"; do

		create_repo "${input}" "${output}" "${tempdir}" \

			"${systype}" "${autocrlf}" "${attr}"

	done

done