#!/bin/sh
# Check file names in git commits for GNU Emacs.

# Copyright 2014-2015 Free Software Foundation, Inc.

# This file is part of GNU Emacs.

# GNU Emacs 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.

# GNU Emacs 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 GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

LC_ALL=C
export LC_ALL

exec >&2

. git-sh-setup

git_diff='git diff --cached --name-only --diff-filter=A'
ok_chars='\0+[=-=]./0-9A-Z_a-z'
nbadchars=`$git_diff -z HEAD | tr -d "$ok_chars" | wc -c`

if test "$nbadchars" -ne 0; then
  echo "File name does not consist of -+./_ or ASCII letters or digits."
  exit 1
fi

for new_name in `$git_diff HEAD`; do
  case $new_name in
    -* | */-*)
      echo "$new_name: File name component begins with '-'."
      exit 1;;
    ChangeLog | */ChangeLog)
      echo "$new_name: Please use git commit messages, not ChangeLog files."
      exit 1;;
  esac
done

exec git diff-index --check --cached HEAD --