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#! @SHELL@
# $Id$
# 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[.in].
#
# Copyright 2015-2022 Karl Berry <tex-live@tug.org>
# Copyright 2009-2012 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.
#
prg=`basename $0`
target=$1; shift
base=$1
case $base in
common) file=cweb; exts=c;;
ctangle) file=ctangle; exts=c;;
*) echo "Usage: $0 TARGET common|ctangle [CHANGEFILE] [OUTFILE]" >&2
exit 1;;
esac
TEXMFCNF=@srcdir@/../kpathsea; export TEXMFCNF
CWEBINPUTS=@srcdir@/cwebdir; export CWEBINPUTS
do_ctangleboot () {
echo timestamp >$stamp.tmp
if $AM_V_P; then
echo "$prg: @CTANGLEBOOT@ $@"
@CTANGLEBOOT@ "$@" || exit 1
test -s $file.$exts \
|| { echo "$prg: $file.$exts empty." >&2; rm -f $file.$exts; exit 1; }
else
echo " CTANGLE " $base
@CTANGLEBOOT@ "$@" >$base.out 2>&1; rc=$?
# succeed and generate nonempty file
(test $rc -eq 0 && test -s $file.$exts) \
|| { cat $base.out; rm -f $file.$exts exit $rc; }
rm -f $base.out
fi
mv -f $stamp.tmp $stamp
}
stamp=$base-ctangle
case $target in
$stamp)
# Normal build.
rm -f $stamp.tmp
do_ctangleboot "$@"
;;
*)
# Recover from removal of $target if necessary.
if test -f $target; then
$AM_V_P && echo "$prg: checking for $target ... ok"
exit 0
else
$AM_V_P && echo "$prg: recovering $target"
fi
#
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 $stamp.tmp
do_ctangleboot "$@"
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,' \
$src >$stamp.tmp
if cmp -s $stamp.tmp $dst; then
rm -f $stamp.tmp
else
if $AM_V_P; then
echo "Updating $src => $dst"
else
echo " UPD " ${file}boot.${ext}in
fi
mv -f $stamp.tmp $dst || exit 1
fi
done
exit 0
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