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#! /usr/bin/env perl
eval 'exec perl -S $0 ${1+"$@"}'
    if $running_under_some_shell;

# pod-updatepo -- update the PO translation of POD data.
#
# Copyright 2002-2012 by SPI, inc.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of GPL (see COPYING).

=encoding UTF-8

=head1 NAME

po4a-updatepo - update the translation (in PO format) of documentation

=head1 SYNOPSIS

B<po4a-updatepo> B<-f> I<fmt> (B<-m> I<master.docE>)+ (B<-p> I<XX.po>)+

(I<XX.po> are the outputs, all others are inputs)

=head1 DESCRIPTION

The po4a (PO for anything) project goal is to ease translations (and more
interestingly, the maintenance of translations) using gettext tools on
areas where they were not expected like documentation.

The B<po4a-updatepo> script is in charge of updating PO files to make
them reflect the changes made to the original documentation file. For that,
it converts the documentation file to a POT file, and call L<msgmerge(1)>
on this new POT and on the provided PO files.

It is possible to give more than one PO file (if you want to update several
languages at once), and several documentation files (if you want to store
the translations of several documents in the same PO file).

If the master document has non-ASCII characters, it will convert the PO files
to UTF-8 (if they weren't already), in order to allow non-standard characters
in a culture independent way.

=head1 OPTIONS

=over 4

=item B<-f>, B<--format>

Format of the documentation you want to handle. Use the B<--help-format>
option to see the list of available formats.

=item B<-m>, B<--master>

File(s) containing the master document to translate.

=item B<-M>, B<--master-charset>

Charset of the files containing the document to translate. Note that all
files must have the same charset.

=item B<-p>, B<--po>

PO file(s) to update. If these files do not exist, they are created by
B<po4a-updatepo>.

=item B<-o>, B<--option>

Extra option(s) to pass to the format plugin and other po4a internal module.
Specify each option in the 'I<name>B<=>I<value>' format. See the documentation of
each plugin for more information about the valid options and their meanings.

=item B<--no-previous>

This option removes B<--previous> from the options passed to B<msgmerge>.
This permits to support versions of B<gettext> earlier than 0.16.

=item B<--previous>

This option adds B<--previous> to the options passed to B<msgmerge>.
It requires B<gettext> 0.16 or later, and is activated by default.

=item B<--msgmerge-opt> I<options>

Extra options for B<msgmerge>(1).

=item B<-h>, B<--help>

Show a short help message.

=item B<--help-format>

List the documentation formats understood by po4a.

=item B<-V>, B<--version>

Display the version of the script and exit.

=item B<-v>, B<--verbose>

Increase the verbosity of the program.

=item B<-d>, B<--debug>

Output some debugging information.

=item B<--porefs> I<type>[,B<wrap>|B<nowrap>]

Specify the reference format. Argument I<type> can be one of B<none> to not
produce any reference, B<noline> to not specify the line number (more
accurately all line numbers are replaced by 1), B<counter> to replace line
number by an increasing counter, and B<full> to include complete
references.

Argument can be followed by a comma and either B<wrap> or B<nowrap> keyword.
References are written by default on a single line.  The B<wrap> option wraps
references on several lines, to mimic B<gettext> tools (B<xgettext> and
B<msgmerge>).  This option will become the default in a future release, because
it is more sensible.  The B<nowrap> option is available so that users who want
to keep the old behavior can do so.

=item B<--msgid-bugs-address> I<email@address>

Set the report address for msgid bugs. By default, the created POT files
have no Report-Msgid-Bugs-To fields.

=item B<--copyright-holder> I<string>

Set the copyright holder in the POT header. The default value is
"Free Software Foundation, Inc."

=item B<--package-name> I<string>

Set the package name for the POT header. The default is "PACKAGE".

=item B<--package-version> I<string>

Set the package version for the POT header. The default is "VERSION".

=back

=head1 SEE ALSO

L<po4a-gettextize(1)>,
L<po4a-normalize(1)>,
L<po4a-translate(1)>,
L<po4a(7)>

=head1 AUTHORS

 Denis Barbier <barbier@linuxfr.org>
 Nicolas François <nicolas.francois@centraliens.net>
 Martin Quinson (mquinson#debian.org)

=head1 COPYRIGHT AND LICENSE

Copyright 2002-2012 by SPI, inc.

This program is free software; you may redistribute it and/or modify it
under the terms of GPL (see the COPYING file).

=cut

use 5.006;
use strict;
use warnings;

use Getopt::Long qw(GetOptions);
use Locale::Po4a::Po;

use Locale::Po4a::Chooser;
use Locale::Po4a::TransTractor;
use Locale::Po4a::Common;

use Pod::Usage qw(pod2usage);

use File::Temp;
use File::Copy qw(copy);
use Config;

Locale::Po4a::Common::textdomain('po4a');

sub show_version {
    Locale::Po4a::Common::show_version("po4a-updatepo");
    exit 0;
}


# init commandline parser
Getopt::Long::config('bundling', 'no_getopt_compat', 'no_auto_abbrev');

# Parse our options
my (@masterfiles,@pofiles);
my ($help,$help_fmt,$verbose,$debug,$format,@options);
my ($copyright_holder, $msgid_bugs_address, $package_name, $package_version);
my $mastchar;
my $previous;
my $noprevious;
my $msgmerge_opt = "";
GetOptions('help|h'      => \$help,
           'help-format' => \$help_fmt,

           'master|m=s'  => \@masterfiles,
           'po|p=s'      => \@pofiles,
           'format|f=s'  => \$format,

           'master-charset|M=s' => \$mastchar,

           'option|o=s'  => \@options,

           'no-previous' => \$noprevious,
           'previous'    => \$previous,
           'msgmerge-opt=s'      => \$msgmerge_opt,
           'copyright-holder=s'  => \$copyright_holder,
           'msgid-bugs-address=s'=> \$msgid_bugs_address,
           'package-name=s'      => \$package_name,
           'package-version=s'   => \$package_version,

           'verbose|v'   => \$verbose,
           'debug|d'     => \$debug,
           'version|V'   => \&show_version)
    or pod2usage();

$help && pod2usage (-verbose => 1, -exitval => 0);
$help_fmt && Locale::Po4a::Chooser::list(0);
pod2usage () if scalar @masterfiles < 1 || scalar @pofiles < 1;

$msgmerge_opt .= " --previous" unless $noprevious;
$msgmerge_opt =~ s/^\s+//;

my %options = (
    "verbose"            => $verbose,
    "debug"              => $debug,
    "copyright-holder"   => $copyright_holder,
    "msgid-bugs-address" => $msgid_bugs_address,
    "package-name"       => $package_name,
    "package-version"    => $package_version);

foreach (@options) {
    if (m/^([^=]*)=(.*)$/) {
        $options{$1}="$2";
    } else {
        $options{$_}=1;
    }
}

# parser
my ($doc)=Locale::Po4a::Chooser::new($format,%options);

map { -e $_ || die wrap_msg(gettext("File %s does not exist."), $_) } @masterfiles;
map { die wrap_msg(gettext("po4a-updatepo can't take the input PO from stdin."))
        if $_ eq '-'  && !-e '-'} @pofiles;

my ($pot_filename);
(undef,$pot_filename)=File::Temp::tempfile("po4a-updatepoXXXX",
                                           DIR    => $ENV{TMPDIR} || "/tmp",
                                           SUFFIX => ".pot",
                                           OPEN   => 0,
                                           UNLINK => 0)
    or die wrap_msg(gettext("Can't create a temporary POT file: %s"), $!);


print STDERR wrap_msg(gettext("Parse input files... ")) if $verbose;

$doc->{TT}{utf_mode} = 1;

$doc->process('file_in_name'    => \@masterfiles,
              'file_in_charset' => $mastchar,
              'po_out_name'     => $pot_filename,
              'debug'           => $debug,
              'verbose'         => $verbose);

print STDERR wrap_msg(gettext("done.")) if $verbose;


while (my $po_filename=shift @pofiles) {
    if (-e $po_filename) {
        print STDERR wrap_msg(gettext("Updating %s:"), $po_filename)
          if $verbose;
        my @cmd = ("msgmerge".$Config{_exe});
        push (@cmd, split(/\s+/, $msgmerge_opt)) if length($msgmerge_opt);
        push @cmd, ("-U", $po_filename, $pot_filename);
        system (@cmd) == 0
          or die wrap_msg(gettext("Error while running msgmerge: %s"), $!);
        @cmd = ("msgfmt".$Config{_exe}, "--statistics", "-v", "-o", File::Spec->devnull(), $po_filename);
        system (@cmd)
          if $verbose;
    } else {
        print STDERR wrap_msg(gettext("Creating %s:"), $po_filename)
          if $verbose;
        copy ($pot_filename,$po_filename)
          or die wrap_msg(gettext("Error while copying the PO file: %s"), $!);
    }
}

unlink($pot_filename);