#!/bin/sh
# Check for files in directory $1 being up to date, according to the
# list on stdin. Don't actually make any changes, just show the diffs.
#
# Empty (or only whitespace) input lines are ignored.
# Lines beginning with # are ignored.
# Lines with just one word are ignored.
# Otherwise, the line has two or more whitespace-separated words:
# the first word is the source directory, which can be a top-level
# directory of source archive,
# the second word is the source file name relative to the source
# directory, and
# the third word is the destination, other optional words are
# options.
# The possible options are "gpl" (to replace the license with the GPL)
# and "doclicense" (to replace @include doclicense.texi with fdl.texi)
# and "release" (to use the release version instead of the
# development version).
# Unrecognized options are ignored.
# $VARIABLE expansions are done (with sh eval).
#
# This script is used in gnulib and texinfo; the input files are named
# srclist.txt.
#
# Copyright (C) 2002-2003, 2005, 2007-2017 Free Software Foundation, Inc.
#
# This program 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.
#
# This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
# Originally written by Karl Berry.
if test -n "$1"; then
cd "$1" || exit 1
fi
verbose=false
#chicken="echo (would)"
: ${TMPDIR=/tmp}
dsttmp=$TMPDIR/srclist.dst
# Source `dirname $0`/srclistvars.sh first, if it exists.
mydir=`dirname $0`
test -r $mydir/srclistvars.sh && . $mydir/srclistvars.sh
#
# sed command to fix the license to be GPL.
fixlicense='
/^[[:space:]]*#[[:space:]]*Th[ei][ s].* is free software/,/^[[:space:]]*#.*USA\./c\
# This program 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.\
#\
# This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
/Th[ei][ s].* is free software/,/\*\//c\
This program 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.\
\
This program 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 this program. If not, see <https://www.gnu.org/licenses/>. */
'
# sed command to remove lines containing $Id lines.
# Quote the $ so that CVS does not expand it in this script.
remove_id_lines='/[$]Id:.*[$]/d'
# $1 is the root directory of input file, $2 is input file, $3 is
# output. Remove $Id lines, since they'll differ between source
# locations. If $options contains "gpl", change the license to be the
# standard GPL. We use this for libc files, et al.
#
fixfile() \
{
sed_command="$remove_id_lines"
case " $options " in
*' gpl '*)
sed_command="$sed_command; $fixlicense";;
*' doclicense '*)
sed_command="$sed_command; s/@include doclicense.texi/@include fdl.texi/";;
esac
sed "$sed_command" $1 >$2-t && mv $2-t $2
}
#
cat | while read top src dst options; do
#echo "top=$top, src=$src, dst=$dst, options=$options" >&2
case $top:$src:$dst in
*: ) continue;; # skip lines without last element
'#'* ) continue;; # skip comment-only lines
esac
release=false
case " $options " in
*' release '*)
release=true
;;
esac
eval top=$top
if $release && test ! -d $top/.git; then
echo "$0: 'release' option only works with git checkout"
release=false
fi
# Expand variables and make sure we have an input file.
src1=$src
eval src=$top/$src
if test ! -r $src; then
echo "$0: cannot read $src" >&2
continue
fi
# Ignore subdirs in src dir. E.g., if input spec is
# src/subdir/foo.c dst
# then write destination file dst/foo.c.
eval dst=$dst
test -d $dst && dst=$dst/`basename $src`
if $release; then
rev=$(git --git-dir=$top/.git describe --abbrev=0)
reltmp=$TMPDIR/`basename $src1`:$rev
git --git-dir=$top/.git show $rev:$src1 > $reltmp
fixfile $reltmp $reltmp
fi
# Fix files in both src and dst, for the sake
# of a clean comparison.
srctmp=$TMPDIR/`basename $src`
fixfile $src $srctmp
test -r $dst && fixfile $dst $dsttmp
# if src was executable, make dst executable, to placate git.
test -x $src && chmod a+x $dst
if test ! -e $dst; then
echo "## $srctmp $dst # new"
$chicken cp -p $srctmp $dst
elif $release && cmp -s $reltmp $dsttmp; then
$verbose && echo "## $reltmp $dst # unchanged"
elif cmp -s $srctmp $dsttmp; then
$verbose && echo "## $srctmp $dst # unchanged"
else
echo "## $srctmp $dst # changes"
diff -C 2 $dst $srctmp
fi
done
rm -f $dsttmp
