#!/bin/sh

# Read in library functions
if ! [ -r @LIB@/patchfns ]
then
	echo "Cannot read library @LIB@/patchfns" >&2
	exit 1
fi
. @LIB@/patchfns

usage()
{
	echo "Usage: inpatch [patchname]"
	echo "       inpatch -f filename"
	if [ x$1 = x-h ]
	then
		cat <<EOF

Print the list of files that the topmost or specified patch
changes.

-f	Print which patches change the specified file.

EOF
		exit 0
	else
		exit 1
	fi
}

options=`getopt -o f:h -- "$@"`

if [ $? -ne 0 ]
then
	usage
fi

eval set -- "$options"

while true
do
	case "$1" in
	-f)
		opt_file=$2
		shift 2 ;;
	-h)
		usage -h ;;
	--)
		shift
		break ;;
	esac
done

if [ $# -gt 1 ]
then
	usage
fi
opt_patch=$1

scan_patches()
{
	local patches=$* patch
	for patch in $patches
	do
		refresh_file_list $patch
		status=$?
		if [ $status -eq 2 ]
		then
			if [ -z "$opt_quiet" ]
			then
				echo "Recreated file list for $patch" >&2
			fi
		elif [ $status -ne 0 ]
		then
			echo "Could not create file list for patch $patch" >&2
			return 1
		fi
	done
	
	grep -l -e "^$(quote_re $opt_file)\$" $(pc_file_name $patches) \
	| sed -e 's:^\.pc/::' -e 's:/\.pc$::'
}

if [ -n "$opt_patch" ]
then
	patch=$(stripit "$opt_patch")
else
	patch=$(top_patch)
	if [ -z "$patch" ]
	then
		echo "No patches applied" >&2
		exit 1
	fi
fi

if [ -z "$opt_file" ]
then
	if ! is_applied $patch
	then
		if ! patch_in_series
		then
			echo "Patch $patch not in series file" >&2
		else
			echo "Patch is not applied (no old/new status)" >&2
			no_status=1
		fi
	fi

	for file in $(files_in_patch $patch)
	do
		if [ -n "$no_status" -o -s $(backup_file_name $patch $file) ]
		then
			echo "$file"
		else
			echo "$file (new)"
		fi
	done
else
	#if [ -n "$opt_patch" ]
	#then
	#	scan_patches $(patches_before $opt_patch) | sed -e 's/^/> /'
	#	scan_patches $opt_patch | sed -e 's/^/| /'
	#	scan_patches $(patches_after $opt_patch) | sed -e 's/^/< /'
	#else
	#	series=$(cat_series)
	#	if [ -n "$series" ]
	#	then
	#		scan_patches $series | sed -e 's/^/< /'
	#	fi
	#fi
	series=$(cat_series)
	if [ -n "$series" ]
	then
		scan_patches $series
		#| sed -e 's/^'"$(quote_re $patch)"'$/\0 (here)/'
	fi
fi