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#! @SHELL@
# ctangleboot-sh: shell script to invoke ctangleboot and if required
# update c{tangle,web}boot.[ch]in from c{tangle,web}.[ch].
# For details see tangle.sh.
#
# Copyright (C) 2009 Peter Breitenlohner <tex-live@tug.org>
#
# This file is free software; the copyright holder
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
#
target=$1; shift
base=$1
case $base in
common) file=cweb; exts='c h';;
ctangle) file=ctangle; exts=c;;
*) echo "Usage: $0 TARGET {common|ctangle} [CHANGEFILE]" >&2; exit 1;;
esac
TEXMFCNF=@srcdir@/../kpathsea; export TEXMFCNF
CWEBINPUTS=@srcdir@/cwebdir; export CWEBINPUTS
stamp=$base-ctangle
case $target in
$stamp)
# Normal build.
rm -f $stamp.tmp
echo timestamp >$stamp.tmp
echo "@CTANGLEBOOT@ $@"
@CTANGLEBOOT@ "$@" || exit 1
mv -f $stamp.tmp $stamp
;;
*)
# Recover from removal of $target
test -f $target && exit 0
trap "rm -rf $stamp $stamp.lock" 1 2 13 15
if mkdir $stamp.lock 2>/dev/null; then
# Code executed by the first process.
rm -f $stamp $stamp.tmp
echo timestamp >$stamp.tmp
echo "@CTANGLEBOOT@ $@"
@CTANGLEBOOT@ "$@" || exit 1
mv -f $stamp.tmp $stamp
rmdir $stamp.lock
else
# Code executed by the follower processes.
# Wait until the first process is done.
while test -d $stamp.lock; do sleep 1; done
# Succeed if and only if the first process succeeded.
test -f $stamp; exit $?
fi
;;
esac
for ext in $exts; do
src=$file.$ext
dst=@srcdir@/${file}boot.${ext}in
sed -e 's,@srcdir@/cwebdir,cwebdir,' \
-e 's,^#include "cweb.h",#include "cwebboot.h",' \
$src >$stamp.tmp
if cmp -s $stamp.tmp $dst; then
rm -f $stamp.tmp
else
echo "Updating $src => $dst"
mv -f $stamp.tmp $dst || exit 1
fi
done
exit 0
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