mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 12:23:04 +00:00
157 lines
3.7 KiB
Perl
Executable File
157 lines
3.7 KiB
Perl
Executable File
#! /usr/bin/perl -w
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# Extract all examples from the manual source.
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# This file is part of GNU Bison
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# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2012 Free Software
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# Foundation, Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Usage: extexi input-file.texi ... -- [FILES to extract]
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use strict;
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# normalize($block)
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# -----------------
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# Remove Texinfo mark up.
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sub normalize($)
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{
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local ($_) = @_;
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s/^\@(c |comment|dots|end (ignore|group)|ignore|group).*//mg;
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s/\@value\{VERSION\}/$ENV{VERSION}/g;
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s/^\@(error|result)\{\}//mg;
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s/\@([{}@])/$1/g;
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s/\@comment.*//;
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$_;
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}
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# Print messages only once.
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my %msg;
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sub message($)
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{
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my ($msg) = @_;
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if (! $msg{$msg})
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{
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print STDERR "extexi: $msg\n";
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$msg{$msg} = 1;
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}
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}
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# basename => full file name for files we should extract.
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my %file_wanted;
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# Whether we already say that file (in which case, append instead of
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# create).
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my %file_output;
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sub process ($)
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{
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my ($in) = @_;
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use IO::File;
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my $f = new IO::File($in)
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or die "$in: cannot open: $?";
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# The latest "@comment file: " argument.
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my $file;
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# The @example block currently read.
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my $input;
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local $_;
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while (<$f>)
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{
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if (/^\@comment file: (.*)/)
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{
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my $f = $1;
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if ($file_wanted{$f})
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{
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$file = $file_wanted{$f};
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message(" GEN $file");
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}
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else
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{
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message("SKIP $f");
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}
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}
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elsif ($file && /^\@(small)?example$/ .. /^\@end (small)?example$/)
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{
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if (/^\@(small)?example$/)
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{
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$input = $file_output{$file} ? "\n" : "";
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# Bison supports synclines, but not Flex.
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$input .= sprintf ("#line %s \"$in\"\n", $. + 1)
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if $file =~ /\.[chy]*$/;
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next;
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}
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elsif (/^\@end (small)?example$/)
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{
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die "no contents: $file"
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if $input eq "";
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$input = normalize($input);
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# No spurious end of line: use printf.
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my $o =
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($file_output{$file}
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? new IO::File(">>$file")
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: new IO::File(">$file"));
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print $o $input;
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$file_output{$file} = 1;
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$file = $input = undef;
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}
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else
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{
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$input .= $_;
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}
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}
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}
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}
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my @input;
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my $seen_dash = 0;
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for my $arg (@ARGV)
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{
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if ($arg eq '--')
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{
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$seen_dash = 1;
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}
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elsif ($seen_dash)
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{
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use File::Basename;
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$file_wanted{basename($arg)} = $arg;
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}
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else
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{
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push @input, $arg;
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}
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}
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process $_
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foreach @input;
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### Setup "GNU" style for perl-mode and cperl-mode.
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## Local Variables:
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## perl-indent-level: 2
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## perl-continued-statement-offset: 2
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## perl-continued-brace-offset: 0
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## perl-brace-offset: 0
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## perl-brace-imaginary-offset: 0
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## perl-label-offset: -2
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## cperl-indent-level: 2
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## cperl-brace-offset: 0
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## cperl-continued-brace-offset: 0
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## cperl-label-offset: -2
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## cperl-extra-newline-before-brace: t
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## cperl-merge-trailing-else: nil
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## cperl-continued-statement-offset: 2
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## End:
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