#!/bin/bash

cmd_mv()
{
	local from="$1"
	local to="$2"
	case $scm in
	cvs)
		cp "$from" "$to"
		cvs add "$to"
		cvs remove -f "$from"
		;;
	git)
		git mv "$from" "$to"
		;;
	esac
}

cmd_commit()
{
	C=''
	for i in "$@"; do 
	    C="$C \"${i//\"/\\\"}\""
	done
	eval $scm commit "$C"
}

cmd_add()
{
	$scm add "$@"
}

cmd_rm()
{
	case $scm in
	cvs)
		cvs remove "$@"
		;;
	git)
		git rm "$@"
		;;
	esac
}

cmd_clean()
{
	case $scm in
	cvs)
		while [ "${1:0:1}" = - ]; do
			shift
		done
		set +e
		local file
		for file in $@; do
			if ! grep -q "/$file/" CVS/Entries; then
				rm -f $file
			fi
		done
		;;
	git)
		git clean "$@"
		;;
	esac
}

cmd_ls_files()
{
	filter_deleted()
	{
		local rc_file="$1"
		shift
		local cand
		for cand in "$@"; do
			grep -q "^R ./$cand/" $rc_file && continue
			echo $cand
		done
	}

	output()
	{
		if [ "$zero_terminate" = 1 ]; then
			echo -en "$*\x00"
		else
			echo "$*"
		fi
	}

	list_dirents_cvs()
	{
		local dirs=`sed '/^D\// !d; s%^D/%%; s%/.*%%' $1/CVS/Entries`
		dirs="`filter_deleted $1/CVS/Entries $dirs`"
		local cands
		if [ -f $1/CVS/Entries.Log ]; then
			cands="`sed '/^A D\// !d; s%^A D/%%; s%/.*%%' $1/CVS/Entries.Log`"
			dirs="$dirs `filter_deleted $1/CVS/Entries.Log $cands`"
		fi
		local files=`sed '/^\// !d; s%/%%; s%/.*%%; s%^%%' $1/CVS/Entries`
		files="`filter_deleted $1/CVS/Entries $files`"
		local d f
		for f in $files; do
			output "$1/$f"
		done
		for d in $dirs; do
			[ "$opt_only_regular_files" = 1 ] || output $1/$d
			list_dirents_cvs $1/$d
		done
	}

	list_dirents_git()
	{
		local opts="$git_ls_files_opts"
		[ "$opt_no_submodules" = 1 ] || opts="$opts --recurse-submodules"
		git ls-files $opts $1
	}

	list_dirents()
	{
		if [ -d $1/CVS ]; then
			list_dirents_cvs $1
			return
		fi
		git status >/dev/null 2>&1 || {
			echo "failed to list versioned files in $1: no VCS" >&2
			exit 1
		}
		list_dirents_git $1
	}

	set -- `getopt fnzt "$@"`

	while [ "$1" != -- ]; do
	case $1 in
	-f)
		opt_only_regular_files=1
		;;
	-n)
		opt_no_submodules=1
		;;
	-z)
		zero_terminate=1
		git_ls_files_opts="$git_ls_files_opts -z"
		opt_sort="$opt_sort -z"
		;;
	-t)
		text_files=1
		;;
	esac
	shift
	done
	shift

	proj_dir="$1"
	[ "$proj_dir" ] && cd $proj_dir

	if [ "$text_files" ]; then
		list_dirents . | sort $opt_sort | xargs file -N | grep ":.*text" | cut -d: -f1
	else
		list_dirents . | sort $opt_sort
	fi
}

# ------- here we go
export LANG=POSIX
myname=`basename $0`
cmd=cmd_${1//-/_}
shift
if [ -d "CVS" ]; then
	scm=cvs
else
	scm=git
fi

$cmd "$@"