#!/bin/bash
#---------------------------------*- sh -*-------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     | Website:  https://openfoam.org
#   \\  /    A nd           | Copyright (C) 2011-2019 OpenFOAM Foundation
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM.
#
#     OpenFOAM is free software: you can redistribute it and/or modify it
#     under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 3 of the License, or
#     (at your option) any later version.
#
#     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
#     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
#     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
#     for more details.
#
#     You should have received a copy of the GNU General Public License
#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     pre-receive-hook
#
# Description
#     pre-receive hook for git. Copy or link this file to
#     ".git/hooks/pre-receive"; e.g.,
#     (
#         cd $WM_PROJECT_DIR/.git/hooks &&
#         ln -sf ../../bin/tools/pre-receive-hook pre-receive
#     )
#
#     Hook receives: <old-sha1> <new-sha1> <ref-name>
#
#     Checks for:
#     - tabs
#     - trailing whitespace and non-standard line endings
#     - lines longer that than 80 characters
#     - non-standard code patterns, > > and NULL
#     - mismatched header #ifndef/#define names
#     - incorrect copyright statements
#
#------------------------------------------------------------------------------

. bin/tools/HookFunctions || exit 1

while read -r oldSHA1 newSHA1 refName
do
    unset rawFiles files

    # Get the list of changed files
    if [ "$newSHA1" = 0 ]
    then
        continue
    elif [ "$oldSHA1" = 0 ]
    then
        readarray -t rawFiles < <(git diff-tree --root "$newSHA1")
    else
        readarray -t rawFiles < <(git diff --name-only "$oldSHA1".."$newSHA1")
    fi

    # If no files have changed then the checks are not necessary
    [ "${#rawFiles[@]}" -gt 0 ] || continue

    # Filter the file list
    files=()
    for file in "${rawFiles[@]}"
    do
        if git cat-file -e "$newSHA1":"$file" > /dev/null 2>&1
        then
            files+=("$file")
        fi
    done

    # Do the checks
    checkAllNoCopyright "$newSHA1" false "${files[@]}" || exit 1
done

exit 0

#------------------------------------------------------------------------------