#! /usr/bin/env bash
# -*- tab-width: 4; -*-
# vi: set sw=2 ts=4:

# Copyright 2024 The Khronos Group Inc.
# SPDX-License-Identifier: Apache-2.0

# Wrapper for git diff to use ktx compare.

# Per https://git-scm.com/docs/git/2.18.0#Documentation/git.txt-codeGITEXTERNALDIFFcode
# git diff sends 7 arguments:
#    path old-file old-hex old-mode new-file new-hex new-mode

if [ $# -ne 7 ]; then
  echo "$0: Git did not provide the expected 7 arguments."
  exit 1
fi

oldfile=$2
newfile=$5

#echo "oldfile = $oldfile"
#echo "newfile = $newfile"

ktx compare $oldfile $newfile
# Mask ktx compare's exit code. git diff expects the diff program to exit
# without error even when there are differences.
status=$?
if [ $status -eq 7 ]; then
  exit 0
else
  exit $status
fi