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;# $Id$
;#
;# Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
;#
;# You may redistribute only under the terms of the Artistic Licence,
;# as specified in the README file that comes with the distribution.
;# You may reuse parts of this distribution only within the terms of
;# that same Artistic Licence; a copy of which may be found at the root
;# of the source tree for dist 4.0.
;#
;# $Log: copyright.pl,v $
;# Revision 3.0 1993/08/18 12:10:51 ram
;# Baseline for dist 3.0 netwide release.
;#
;#
;# Copyright expansion. The @COPYRIGHT@ symbol is expanded the first time
;# it is seen in a file, and before the $Log RCS marker is reached. The
;# automaton needs to be reset for each file.
;#
package copyright;
# Read in copyright file
sub init {
local($file) = @_; # Copyright file
undef @copyright;
open(COPYRIGHT, $file) || die "Can't open $file: $!\n";
chop(@copyright = <COPYRIGHT>);
close COPYRIGHT;
}
# Reset the automaton for a new file.
sub reset {
$copyright_seen = @copyright ? 0 : 1;
$marker_seen = 0;
}
# Filter file, line by line, and expand the copyright string. The @COPYRIGHT@
# symbol may be preceded by some random comment. A leader can be defined and
# will be pre-pended to all the input lines.
sub filter {
local($line, $leader) = @_; # Leader is optional
return $leader . $line if $copyright_seen || $marker_seen;
$marker_seen = 1 if $line =~ /\$Log[:\$]/;
$copyright_seen = 1 if $line =~ /\@COPYRIGHT\@/;
return $leader . $line unless $copyright_seen;
local($comment, $trailer) = $line =~ /^(.*)\@COPYRIGHT\@\s*(.*)/;
$comment = $leader . $comment;
$comment . join("\n$comment", @copyright) . "\n";
}
# Filter output of $cmd redirected into $file by expanding copyright, if any.
sub expand {
local($cmd, $file) = @_;
if (@copyright) {
open(CMD,"$cmd|") || die "Can't start '$cmd': $!\n";
open(OUT, ">$file") || die "Can't create $file: $!\n";
&reset;
local($_);
while (<CMD>) {
print OUT &filter($_);
}
close OUT;
close CMD;
} else {
system "$cmd > $file";
die "Command '$cmd' failed!" if $?;
}
}
package main;
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