#!/usr/bin/perl -w

# This script checks if the translations of the documents are up to date.
# When called with "-d" option, it also prints what has changed in the
# original since last translation

# SYNOPSIS:
#             ./doc-check [-d] [-v] [-V] [lang]
#
#	(uses $lang set below if lang is not given on commandline)

use Getopt::Std;
$opt_d = $opt_v = $opt_V = 0;
getopts('dvV');
# You may set this to your default language code
$lang = shift || "pl";

sub checkdiff
{
	my ($plfname, $enfname) = (@_);
	my ($plrev, $enrev) = getrev($plfname, $enfname);
	$plrev and $enrev or return;
	if ( "$plrev" ne "$enrev" ) {
		if ($opt_d) {
			my $s = "cvs diff -b -u -r $plrev -r $enrev $enfname";
			warn "running $s:\n" if ($opt_V);
			system($s);
		} else {
			print "$enfname : $plrev -> $enrev\n";
		}
	}
}

sub getrev
{
	my ($plfname, $enfname) = (@_);
	my ($plrev, $enrev) = (0, 0);

	warn "checking $plfname:\n" if $opt_v;
	open FILE, $plfname or warn "$plfname: $!\n" and return;
	while (<FILE>) {
		if (/<!--\s*original version\D*([\d\.]+)\s*-->/) {
			$plrev = $1;
			last;
		}
		if (/<!--\s*original document: en\/\S+, revision ([\d\.]+)\s*-->/) {
			$plrev = $1;
			last;
		}
	}
	warn "checking $enfname:\n" if $opt_v;
	open FILE, $enfname or warn "$enfname: $!\n" and return;
	while (<FILE>) {
		if (/\$Id: [^\s]+ ([\d\.]+) .* Exp \$/) {
			$enrev = $1;
			last;
		}
		if (/\$Revision: ([\d\.]+) \$/) {
			$enrev = $1;
			last;
		}
	}
	close FILE;
	warn "failed to find revision for $plfname\n" unless $plrev;
	warn "failed to find revision for $enfname\n" unless $enrev;
	return ($plrev, $enrev);
}

@subdocs = ("welcome", "hardware", "preparing", "inst-methods", "rescue-boot", "partitioning", "kernel", "boot-new", "post-install", "tech-info", "appendix", "administrivia");

foreach $doc (@subdocs) {
	my $plfname = "$lang/" . "$doc" . ".sgml";
	my $enfname = "en/" . "$doc" . ".sgml";
	checkdiff($plfname, $enfname);
}
checkdiff("install.$lang.sgml", "install.sgml");
checkdiff("release-notes.$lang.sgml","release-notes.sgml");
checkdiff("index.$lang.html.m4","index.en.html.m4");
checkdiff("dselect-beginner.$lang.sgml","dselect-beginner.sgml");