#! /usr/bin/env bash

# Copyright 2024, Mark Callow
# SPDX-License-Identifier: Apache-2.0

# gk: grep in ktx software

# Depth of this script relative to the project root
depth=..

usage() {
  echo "Usage: $0 [--help,-h] [--filepattern,-f <filename pattern>] [<match pattern>]"
  echo "  <filename pattern> defaults to '*' if no -f."
  echo "  With no <match pattern> prints names of files matching <filename pattern>."
  exit $1
}

while [ $# -ne 0 ]; do
  case $1 in
    --help | -h)
      usage 0
      ;;
    --filepattern | -f)
      if [ $# -lt 1 ]; then
        usage 1
      else
        filepattern=$2
        shift 2
      fi
      ;;
     --*)
       usage 1
       ;;
     *)
       break
       ;;
  esac
done

if [ -z "$filepattern" -a $# -eq 0 ]; then
  usage 1
fi

if [ $# -eq 1 ]; then
  match=$1
elif [ $# -gt 1 ]; then
  usage 1
elif [ -z "$filepattern" ]; then
  usage 1
fi

if [ -z "$filepattern" ]; then
  filepattern='*'
fi

# Make sure we're in the KTX root directory
cd $(dirname $0)/$depth
if [ -n "$match" ]; then
  find . -path './build*' -prune -o -path tests/cts -prune -o -path './.git' -prune -o -path './external' -prune -o -type f -name "$filepattern" -exec grep -H "$match" {} \;
else
  find . -path './build*' -prune -o -path tests/cts -prune -o -path './.git' -prune -o -path './external' -prune -o -type f -name "$filepattern" -print
fi