crlf: script to generate expected crlf data

Include a shell script that will generate the expected CRLF data,
calling git.git to capture its output as a test resource for the
current platform.

tests/generate_crlf.sh

@@ -0,0 +1,73 @@
+#!/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
+