#!/bin/bash

# Copyright (c) 2010-2023, Lawrence Livermore National Security, LLC. Produced
# at the Lawrence Livermore National Laboratory. All Rights reserved. See files
# LICENSE and NOTICE for details. LLNL-CODE-806117.
#
# This file is part of the MFEM library. For more information and source code
# availability visit https://mfem.org.
#
# MFEM is free software; you can redistribute it and/or modify it under the
# terms of the BSD-3 license. We welcome feedback and contributions, see file
# CONTRIBUTING.md for details.

# Print usage information
case $1 in
   -h|-help)
      cat <<EOF

   $0 [-h|-help] {mfem_dir}

   where: {mfem_dir}  is the MFEM source directory [default value: ../..]
          -h|-help    prints this usage information and exits

   This script checks if the code in mfem_dir conforms to the MFEM C++ style
   (currently based on astyle-3.1). Note that the comparison is done with
   "git diff", so all differences between mfem_dir and the repository will be
   reported. The local changes can be erased (lost!) with "git checkout .".

   In addition to C++ styling, the script also verifies that std::cout and
   std::cerr are not used in the library (use mfem::out and mfem::err instead).

   Example usage: $0 ../..

EOF
      exit
      ;;
esac

# Setup
cur_dir=`pwd`
mfem_dir=$1
if [ "$mfem_dir" = "" ]; then
    mfem_dir="../.."
fi
if [ ! -d $mfem_dir ] || [ ! -f $mfem_dir/mfem.hpp ]; then
   printf "Invalid mfem directory: '$mfem_dir'\n" 1>&2
   exit 1
fi
cd $mfem_dir
mfem_dir=`pwd`
shift

# Verify C++ code styling in MFEM
cd $mfem_dir
# make distclean
if [ -t 1 ]; then
   make style
else
   make_style_out="$(make style 2>&1)"
   if [ "$?" -eq 0 ]; then
     printf "%s\n" "$make_style_out"
   else
     printf "%s\n" "$make_style_out" 1>&2
   fi
fi
git --no-pager diff 1>&2

# Return to the original directory
cd $cur_dir
# Tell users what to do if the script fails
test_name="$(basename "$0")"
if [ -s "$test_name.err" ]; then
    cat >  $test_name.msg <<EOF

To correct this error, run 'make style' and make sure that:

1) You are using Artistic Style 3.1 ("astyle --version").
2) There is no use of std::cout or std::cerr inside the library code (examples
   and miniapps are OK). Use mfem::out and mfem::err instead.
3) Run "make style" to apply astyle formatting and verify your code.

Please contact a member of the MFEM team if you have questions.

EOF
fi