mc/maint/ldiff

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#! /bin/sh
# This script makes pretty looking patches provided that the old files
# are kept around with the .v0 suffix.
: ${backup_suffix=${1:-"\.v0"}}
backup_files=`find . -path "*$backup_suffix" -type f | sort -u`
for oldfile in $backup_files; do
newfile=`echo $oldfile | sed 's,^\./,,;s/'$backup_suffix'$//'`
oldlabel="$oldprefix$newfile"
newlabel="$newprefix$newfile"
find "$oldfile" ! -size 0 | grep . >/dev/null || \
{ oldfile="/dev/null"; oldlabel="/dev/null"; }
find "$newfile" ! -size 0 | grep . >/dev/null || \
{ newfile="/dev/null"; newlabel="/dev/null"; }
case $newfile in
*.c) dflags="-u -p" ;;
*.po) dflags='-U 1 -I^#[:,.~]';;
*) dflags="-u" ;;
esac
diff $dflags -L "$oldlabel" -L "$newlabel" "$oldfile" "$newfile"
done