File: xml-i18n-update

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#!/usr/bin/perl -w

#
#  The Intltool Message Updater
#
#  Copyright (C) 2000-2002 Free Software Foundation.
#
#  Intltool is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License 
#  version 2 published by the Free Software Foundation.
#
#  Intltool is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#  General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
#  As a special exception to the GNU General Public License, if you
#  distribute this file as part of a program that contains a
#  configuration script generated by Autoconf, you may include it under
#  the same distribution terms that you use for the rest of that program.
#
#  Authors: Kenneth Christiansen <kenneth@gnu.org>
#           Maciej Stachowiak
#           Darin Adler <darin@bentspoon.com>

## Release information
my $PROGRAM = "intltool-update";
my $VERSION = "0.23";
my $PACKAGE = "intltool";

## Loaded modules
use strict;
use Getopt::Long;
use Cwd;
use File::Copy;
use File::Find;

## Scalars used by the option stuff
my $HELP_ARG 	   = 0;
my $VERSION_ARG    = 0;
my $DIST_ARG	   = 0;
my $POT_ARG	   = 0;
my $HEADERS_ARG    = 0;
my $MAINTAIN_ARG   = 0;
my $REPORT_ARG     = 0;
my $VERBOSE	   = 0;
my $GETTEXT_PACKAGE = "";

my @languages;
my %po_files_by_lang = ();

# Regular expressions to categorize file types.
# FIXME: Please check if the following is correct

my $xml_extension =
"xml(\.in)*|".		# .in is not required
"ui|".
"glade2?(\.in)*|".	# .in is not required
"scm(\.in)*|".		# .in is not required
"oaf(\.in)+|".
"etspec|".
"sheet(\.in)+|".
"schemas(\.in)+|".
"pong(\.in)+";

my $ini_extension =
"desktop(\.in)+|".
"caves(\.in)+|". 
"directory(\.in)+|".
"soundlist(\.in)+|".
"keys(\.in)+|".
"server(\.in)+";

## Always print as the first thing
$| = 1;

## Handle options
GetOptions 
(
 "help" 	       => \$HELP_ARG,
 "version" 	       => \$VERSION_ARG,
 "dist|d"	       => \$DIST_ARG,
 "pot|p"	       => \$POT_ARG,
 "headers|s"	       => \$HEADERS_ARG,
 "maintain|m"	       => \$MAINTAIN_ARG,
 "report|r"	       => \$REPORT_ARG,
 "verbose|x"	       => \$VERBOSE,
 "gettext-package|g=s" => \$GETTEXT_PACKAGE,
 ) or &print_error_invalid_option;

&print_help if $HELP_ARG;
&print_version if $VERSION_ARG;

my $arg_count = ($DIST_ARG > 0)
    + ($POT_ARG > 0)
    + ($HEADERS_ARG > 0)
    + ($MAINTAIN_ARG > 0)
    + ($REPORT_ARG > 0);
&print_help if $arg_count > 1;

# --version and --help don't require a module name
my $MODULE = $GETTEXT_PACKAGE || &find_package_name;

if ($DIST_ARG) {
    if ($ARGV[0] =~ /^[a-z]/){
        &update_po_file ($ARGV[0]);
        &print_status ($ARGV[0]);
    } else {
        &print_help;
    }
} elsif ($POT_ARG) {
    &generate_headers;
    &generate_po_template;
} elsif ($HEADERS_ARG) {
    &generate_headers;
} elsif ($MAINTAIN_ARG) {
    &find_leftout_files;
} elsif ($REPORT_ARG) {
    &print_report;
} else {
    if ($ARGV[0] =~ /^[a-z]/) {
        &main ($ARGV[0]);
    } else {
        &print_help;
    }
}

exit;

#########

sub print_version
{
    ## Print version information
    print "${PROGRAM} (${PACKAGE}) $VERSION\n";
    print "Written by Kenneth Christiansen, Maciej Stachowiak, and Darin Adler.\n\n";
    print "Copyright (C) 2000-2002 Free Software Foundation, Inc.\n";
    print "This is free software; see the source for copying conditions.  There is NO\n";
    print "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n";
    exit;
}

sub print_help
{
    ## Print usage information
    print "Usage: ${PROGRAM} [OPTIONS] ...LANGCODE\n";
    print "Updates PO template files and merge them with the translations.\n\n";
    print "  -p, --pot              generate the PO template only\n";
    print "  -s, --headers          generate the header files in POTFILES.in\n";
    print "  -m, --maintain         search for left out files from POTFILES.in\n";
    print "  -r, --report           display a status report for the module.\n";
    print "  -x, --verbose          display lots of feedback\n";
    print "      --help             display this help and exit\n";
    print "      --version          output version information and exit\n";
    print "\nExamples of use:\n";
    print "${PROGRAM} --pot    just creates a new PO template from the source\n";
    print "${PROGRAM} da       created new PO template and updated the da.po file\n\n";
    print "Report bugs to bugzilla.gnome.org, module 'intltool'.\n";
    exit;
}

sub main
{
    my ($lang) = @_;

    ## Report error if the language file supplied
    ## to the command line is non-existent
    &print_error_not_existing("$lang.po") if ! -s "$lang.po";

    print "Working, please wait..." unless $VERBOSE;
    &generate_headers;
    &generate_po_template;
    &update_po_file ($lang);
    &print_status ($lang);
}

sub determine_type ($) 
{
   my $type = $_;
   my $gettext_type;

   # FIXME: Use $xml_extentions, and maybe do all this even nicer
   my $xml_regex = 
       "(?:xml(\.in)*|ui|oaf(?:\.in)+|server(?:\.in)+|sheet(?:\.in)+|".
       "pong(?:\.in)+|etspec|schemas(?:\.in)+)";
   my $ini_regex =
       "(?:desktop(?:\.in)+|caves(?:\.in)+|directory(?:\.in)+|".
       "soundlist(?:\.in)+)";

   if ($type =~ /\[type: gettext\/([^\]].*)]/) {
        $gettext_type=$1;
   }
   elsif ($type =~ /schemas(\.in)+$/) {
        $gettext_type="schemas";
   }
   elsif ($type =~ /$xml_regex$/) {
        $gettext_type="xml";
   }
   elsif ($type =~ /glade2?(\.in)*$/) {
        $gettext_type="glade";
   }
   elsif ($type =~ /$ini_regex$/) { 
        $gettext_type="ini";
   }
   elsif ($type =~ /scm(\.in)*$/) {
        $gettext_type="scheme";
   }
   elsif ($type =~ /keys(\.in)+$/) {
        $gettext_type="keys";
   }
   else { $gettext_type=""; }

   return "gettext\/$gettext_type";
}

sub find_leftout_files
{
    my (@buf_i18n_plain,
	@buf_i18n_xml,
	@buf_i18n_xml_unmarked,
	@buf_i18n_ini,
	@buf_potfiles,
	@buf_potfiles_ignore,
	@buf_allfiles,
	@buf_allfiles_sorted,
	@buf_potfiles_sorted
    );

    ## Search and find all translatable files
    find sub { 
	push @buf_i18n_plain, "$File::Find::name" if /\.(c|y|cc|cpp|c\+\+|h|gob)$/ 
	}, "..";
    find sub { 
	push @buf_i18n_xml, "$File::Find::name" if /\.($xml_extension)$/ 
	}, "..";
    find sub {
	push @buf_i18n_ini, "$File::Find::name" if /\.($ini_extension)$/ 
	}, "..";
    find sub {
        push @buf_i18n_xml_unmarked, "$File::Find::name" if /\.(schemas(\.in)+)$/
        }, "..";


    open POTFILES, "POTFILES.in" or die "$PROGRAM:  there's no POTFILES.in!\n";

    @buf_potfiles = grep /^[^#]/, <POTFILES>;
			    
    print "Searching for missing translatable files...\n" if $VERBOSE;

    ## Check if we should ignore some found files, when
    ## comparing with POTFILES.in
    foreach my $ignore ("POTFILES.skip", "POTFILES.ignore") {
        if (-s $ignore) {
            open FILE, $ignore;
            while (<FILE>) {
                if (/^[^#]/){
                    push @buf_potfiles_ignore, $_;
                }
            }
	    print "Found $ignore: Ignoring files...\n" if $VERBOSE;
            @buf_potfiles = (@buf_potfiles_ignore, @buf_potfiles);
        }
    }

    foreach my $file (@buf_i18n_plain)
      {
        my $in_comment = 0;
	my $in_macro = 0;

        open FILE, "<$file";
        while (<FILE>)
	  {
	    # Handle continued multi-line comment.
	    if ($in_comment)
	      {
		next unless s-.*\*/--;
		$in_comment = 0;
	      }

	    # Handle continued macro.
	    if ($in_macro)
	      {
		$in_macro = 0 unless /\\$/;
		next;
	      }

	    # Handle start of macro (or any preprocessor directive).
	    if (/^\s*\#/)
	      {
		$in_macro = 1 if /^([^\\]|\\.)*\\$/;
		next;
	      }

	    # Handle comments and quoted text.
	    while (m-(/\*|//|\'|\")-) # \' and \" keep emacs perl mode happy
	      {
		my $match = $1;
		if ($match eq "/*")
		  {
		    if (!s-/\*.*?\*/--)
		      {
			s-/\*.*--;
			$in_comment = 1;
		      }
		  }
		elsif ($match eq "//")
		  {
		    s-//.*--;
		  }
		else # ' or "
		  {
		    if (!s-$match([^\\]|\\.)*?$match-QUOTEDTEXT-)
		      {
			warn "mismatched quotes at line $. in $file\n";
			s-$match.*--;
		      }
		  }
	      }
	

	    if (/_\(QUOTEDTEXT/)
	      {
		## Remove the first 3 chars and add newline
		push @buf_allfiles, unpack("x3 A*", $file) . "\n";
		last;
	      }
	  }
	close FILE;
      }

    foreach my $file (@buf_i18n_xml) {
        open FILE, "<$file";
        while (<FILE>) {
            if (/\s_(.*)=\"/ || /translatable=\"yes\"/){
                push @buf_allfiles, unpack("x3 A*", $file) . "\n";
                last;
            }
        }
    }

    foreach my $file (@buf_i18n_ini){
        open FILE, "<$file";
        while (<FILE>) {
            if (/_(.*)=/){
                push @buf_allfiles, unpack("x3 A*", $file) . "\n";
                last;
            }
        }
    }

    foreach my $file (@buf_i18n_xml_unmarked){
        push @buf_allfiles, unpack("x3 A*", $file) . "\n";
    }


    @buf_allfiles_sorted = sort (@buf_allfiles);
    @buf_potfiles_sorted = sort (@buf_potfiles);

    my %in2;
    foreach (@buf_potfiles_sorted) {
        $in2{$_} = 1;
    }

    my @result;

    foreach (@buf_allfiles_sorted){
        if (!exists($in2{$_})){
            push @result, $_
        }
    }

    ## Save file with information about the files missing
    ## if any, and give information about this procedure.
    if (@result) {
	print "\n" if $VERBOSE;
        open OUT, ">missing";
        print OUT @result;
        print "The following files contain translations and are currently not in use. Please\n";
	print "consider adding these to the POTFILES.in file, located in the po/ directory.\n\n";
	print @result, "\n";
	print "If some of these files are left out on purpose then please add them to\n";
	print "POTFILES.skip instead of POTFILES.in. A file 'missing' containing this list\n";
        print "of left out files has been written in the current directory.\n";
    }

    ## If there is nothing to complain about, notify the user
    else {
        print "\nAll files containing translations are present in POTFILES.in.\n";
    }
}

sub print_error_invalid_option
{
    ## Handle invalid arguments
    print "Try `${PROGRAM} --help' for more information.\n";
    exit 1;
}

sub generate_headers
{
    my $EXTRACT = `which intltool-extract 2>/dev/null`;
    chomp $EXTRACT;

    $EXTRACT = $ENV{"INTLTOOL_EXTRACT"} if $ENV{"INTLTOOL_EXTRACT"};

    ## Generate the .h header files, so we can allow glade and
    ## xml translation support
    if (! -s $EXTRACT)
    {
	print "\n *** The intltool-extract script wasn't found!"
	     ."\n *** Without it, intltool-update can not generate files.\n";
	exit;
    }
    else
    {
        open FILE, "<POTFILES.in";
        while (<FILE>) {
           chomp;

           ## Find xml files in POTFILES.in and generate the
           ## files with help from the extract script

	   my $gettext_type= &determine_type ($1);

           if (/\.($xml_extension|$ini_extension)$/ || /^\[/){
	       $_ =~ s/^\[[^\[].*]\s*//;
               my $filename = "../$_";

               if ($VERBOSE){
                   system($EXTRACT, "--update", "--type=$gettext_type", $filename);
               } else {
	 	   system($EXTRACT, "--update", "--type=$gettext_type", "--quiet", $filename);
               }
           }
       }
       close FILE;
   }
}

sub generate_po_template
{
    ## Generate the potfiles from the POTFILES.in file

    print "Building the $MODULE.pot...\n" if $VERBOSE;

    move ("POTFILES.in", "POTFILES.in.old");

    open INFILE, "<POTFILES.in.old";
    open OUTFILE, ">POTFILES.in";
    while (<INFILE>) {
        s/\.($xml_extension|$ini_extension)$/$&.h/;
        s/^\[.*]\s*(.*)/$1.h/;
        print OUTFILE $_;
    }
    close OUTFILE;
    close INFILE;

    system ("xgettext", "--default-domain\=$MODULE", 
			"--directory\=\.\.",
	   		"--add-comments", 
			"--keyword\=\_", 
			"--keyword\=N\_", 
			"--keyword\=U\_",
	   		"--files-from\=\.\/POTFILES\.in");

    move ("POTFILES.in.old", "POTFILES.in");

    print "Removing generated header (.h) files..." if $VERBOSE;

    open FILE, "<POTFILES.in";

    while (<FILE>)
    {
        chomp;
        unlink "../$_.h" if /\.($xml_extension|$ini_extension)$/;
    }

    close FILE;
    print "done\n" if $VERBOSE;

    if (!-e "$MODULE.po") {
        print "WARNING: It seems that none of the files in POTFILES.in ".
              "contain marked strings\n";
        exit (1);
    }

    system ("rm", "-f", "$MODULE.pot");
    move ("$MODULE.po", "$MODULE.pot") or die "$PROGRAM: couldn't move $MODULE.po to $MODULE.pot.\n";

    print "Wrote $MODULE.pot\n" if $VERBOSE;
}

sub update_po_file
{
    my ($lang) = @_;

    print "Merging $lang.po with $MODULE.pot..." if $VERBOSE;

    copy ("$lang.po", "$lang.po.old") || die "copy failed: $!";

    # Perform merge, remove backup file and the "messages" trash file 
    # generated by gettext
    system ("msgmerge", "$lang.po.old", "$MODULE.pot", "-o", "$lang.po");
    unlink "$lang.po.old";
    unlink "messages";
}

sub print_error_not_existing
{
    my ($file) = @_;

    ## Report error if supplied language file is non-existing
    print "$PROGRAM: $file does not exist!\n";
    print "Try '$PROGRAM --help' for more information.\n";
    exit;
}

sub gather_po_files
{
    my @po_files = glob ("./*.po");

    @languages = map (&po_file2lang, @po_files);

    foreach my $lang (@languages) {
	$po_files_by_lang{$lang} = shift (@po_files);
    }
}

sub po_file2lang ($)
{
    my $tmp = $_;
    $tmp =~ s/^.*\/(.*)\.po$/$1/;
    return $tmp;
}

sub print_status
{
    my ($lang) = @_;

    system ("msgfmt", "--statistics", "$lang.po");
    print "\n";
}

sub print_report
{
    &generate_headers;
    &generate_po_template;
    &gather_po_files;

    foreach my $lang (@languages) {
	print "$lang: ";
	&update_po_file ($lang);
    }

    print "\n\n * Current translation support in $MODULE \n\n";

    foreach my $lang (@languages){
        print "$lang: ";
	system ("msgfmt", "--statistics", "$lang.po");
    }
}

sub find_package_name
{
    my $base_dirname = getcwd();
    $base_dirname =~ s@.*/@@;

    my ($conf_in, $src_dir);

    if ($base_dirname =~ /^po(-.+)?$/) {
        if (-f "../configure.in") {
            $conf_in = "../configure.in";
	} elsif (-f "../configure.ac") {
	    $conf_in = "../configure.ac";
        } else {
	    my $makefile_source;
	    local (*IN);
	    open IN, "<Makefile" || die "can't open Makefile: $!";

	    while (<IN>) {
		if (/^top_srcdir[ \t]*=/) {
		    $src_dir = $_;
		    # print "${src_dir}\n";

		    $src_dir =~ s/^top_srcdir[ \t]*=[ \t]*([^ \t\n\r]*)/$1/;
		    # print "${src_dir}\n";
		    chomp $src_dir;
		    $conf_in = "$src_dir" . "/configure.in" . "\n";
		    last;
		}
	    }
	    $conf_in || die "Cannot find top_srcdir in Makefile."
        }

	my %varhash = ();
        my $conf_source; {
           local (*IN);
           open (IN, "<$conf_in") || die "can't open $conf_in: $!";
           while (<IN>) {
              if (/^(\w+)=(\S+)/) { $varhash{$1} = $2 };
           }
           seek (IN, 0, 0);
           local $/; # slurp mode
           $conf_source = <IN>;
        }

	my $name = "";
	$name = $1 if $conf_source =~ /^AM_INIT_AUTOMAKE\([\s\[]*([^,\)\s\]]+)/m;
	if ($conf_source =~ /^AC_INIT\([\s\[]*([^,\)\s\]]+)\]?\s*,/m) {
	    $name = $1;
	    $varhash{"AC_PACKAGE_NAME"} = $1;
	}
	$name = $1 if $conf_source =~ /^GETTEXT_PACKAGE=\[?([^\s\]]+)/m;

	$name = "\$AC_PACKAGE_NAME" if "$name" eq "AC_PACKAGE_NAME";

	my $oldname = "";
	while (($name =~ /[\$](\S+)/) && ("$oldname" ne "$name")) {
	    $oldname = $name;
	    if (exists $varhash{$1}) {
		$name =~ s/[\$](\S+)/$varhash{$1}/;
	    }
	}
	return $name if $name;
    }

    print "$PROGRAM: Unable to determine package name.\n" .
	  "Make sure to run this script inside the po directory.\n";
    exit;
}