mc/maint/ldiff

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#! /bin/sh
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# This script makes pretty looking patches provided that the old files
# are kept around with the .v0 suffix.
: ${backup_suffix="\.v0"}
backup_files=`find . -path "*$backup_suffix" -type f | sort -u`
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for oldfile in $backup_files; do
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newfile=`echo $oldfile | sed 's,^\./,,;s/'$backup_suffix'$//'`
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oldlabel="$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" ;;
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*.po) dflags="-u1 -I'^#[:,.~]'";;
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*ChangeLog*) dflags="-u1" ;;
*) dflags="-u" ;;
esac
diff $dflags -L "$oldlabel" -L "$newlabel" "$oldfile" "$newfile"
done