#!@INTLTOOL_PERL@ -w
# -*- Mode: perl; indent-tabs-mode: nil; c-basic-offset: 4  -*-

#
#  The Intltool Message Updater
#
#  Copyright (C) 2000-2003 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 = "0.50.2";
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 $OUTPUT_FILE    = "";

my @languages;
my %varhash = ();
my %po_files_by_lang = ();

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

my $xml_support =
"xml(?:\\.in)*|".	# http://www.w3.org/XML/ (Note: .in is not required)
"ui|".			# Bonobo specific - User Interface desc. files
"lang|".		# ?
"glade2?(?:\\.in)*|".	# Glade specific - User Interface desc. files (Note: .in is not required)
"oaf(?:\\.in)+|".	# DEPRECATED: Replaces by Bonobo .server files
"etspec|".		# ?
"server(?:\\.in)+|".	# Bonobo specific
"sheet(?:\\.in)+|".	# ?
"schemas(?:\\.in)+|".	# GConf specific
"gschema.xml|".         # GLib schema (ie: GSettings) specific
"pong(?:\\.in)+|".	# DEPRECATED: PONG is not used [by GNOME] any longer.
"kbd(?:\\.in)+|".	# GOK specific.
"policy(?:\\.in)+";	# PolicyKit files

my $ini_support =
"icon(?:\\.in)+|".	# http://www.freedesktop.org/Standards/icon-theme-spec
"desktop(?:\\.in)+|".	# http://www.freedesktop.org/Standards/menu-spec
"caves(?:\\.in)+|".	# GNOME Games specific
"directory(?:\\.in)+|".	# http://www.freedesktop.org/Standards/menu-spec
"soundlist(?:\\.in)+|".	# GNOME specific
"keys(?:\\.in)+|".	# GNOME Mime database specific
"theme(?:\\.in)+|".	# http://www.freedesktop.org/Standards/icon-theme-spec
"service(?:\\.in)+";    # DBus specific

my $tlk_support =
"tlk(?:\\.in)+";        # Bioware Aurora Talk Table Format

my $buildin_gettext_support =
"c|y|cs|cc|cpp|c\\+\\+|h|hh|gob|py|scm(?:\\.in)*";

## Always flush buffer when printing
$| = 1;

## Sometimes the source tree will be rooted somewhere else.
my $SRCDIR = $ENV{"srcdir"} || ".";
my $POTFILES_in;

$POTFILES_in = "<$SRCDIR/POTFILES.in";

my $devnull = ($^O eq 'MSWin32' ? 'NUL:' : '/dev/null');

## 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,
 "output-file|o=s"     => \$OUTPUT_FILE,
 ) or &Console_WriteError_InvalidOption;

&Console_Write_IntltoolHelp if $HELP_ARG;
&Console_Write_IntltoolVersion if $VERSION_ARG;

my $arg_count = ($DIST_ARG > 0)
    + ($POT_ARG > 0)
    + ($HEADERS_ARG > 0)
    + ($MAINTAIN_ARG > 0)
    + ($REPORT_ARG > 0);

&Console_Write_IntltoolHelp if $arg_count > 1;

my $MODULE = $GETTEXT_PACKAGE || FindPackageName() || "unknown";

if ($POT_ARG)
{
    &GenerateHeaders;
    &GeneratePOTemplate;
}
elsif ($HEADERS_ARG)
{
    &GenerateHeaders;
}
elsif ($MAINTAIN_ARG)
{
    &FindLeftoutFiles;
}
elsif ($REPORT_ARG)
{
    &GenerateHeaders;
    &GeneratePOTemplate;
    &Console_Write_CoverageReport;
}
elsif ((defined $ARGV[0]) && $ARGV[0] =~ /^[a-z]/)
{
    my $lang = $ARGV[0];

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

    if (!$DIST_ARG)
    {
	print "Working, please wait..." if $VERBOSE;
	&GenerateHeaders;
	&GeneratePOTemplate;
    }
    &POFile_Update ($lang, $OUTPUT_FILE);
    &Console_Write_TranslationStatus ($lang, $OUTPUT_FILE);
}
else
{
    &Console_Write_IntltoolHelp;
}

exit;

#########

sub Console_Write_IntltoolVersion
{
    print <<_EOF_;
${PROGRAM} (${PACKAGE}) $VERSION
Written by Kenneth Christiansen, Maciej Stachowiak, and Darin Adler.

Copyright (C) 2000-2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
_EOF_
    exit;
}

sub Console_Write_IntltoolHelp
{
    print <<_EOF_;
Usage: ${PROGRAM} [OPTION]... LANGCODE
Updates PO template files and merge them with the translations.

Mode of operation (only one is allowed):
  -p, --pot                   generate the PO template only
  -s, --headers               generate the header files in POTFILES.in
  -m, --maintain              search for left out files from POTFILES.in
  -r, --report                display a status report for the module
  -d, --dist                  merge LANGCODE.po with existing PO template

Extra options:
  -g, --gettext-package=NAME  override PO template name, useful with --pot
  -o, --output-file=FILE      write merged translation to FILE
  -x, --verbose               display lots of feedback
      --help                  display this help and exit
      --version               output version information and exit

Examples of use:
${PROGRAM} --pot    just create a new PO template
${PROGRAM} xy       create new PO template and merge xy.po with it

Report bugs to http://bugs.launchpad.net/intltool
_EOF_
    exit;
}

sub echo_n
{
	my $str = shift;
	my $ret = `echo "$str"`;

	$ret =~ s/\n$//; # do we need the "s" flag?

	return $ret;
}

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

   my $xml_regex	 = "(?:" . $xml_support . ")";
   my $ini_regex	 = "(?:" . $ini_support . ")";
   my $tlk_regex	 = "(?:" . $tlk_support . ")";
   my $buildin_regex = "(?:" . $buildin_gettext_support . ")";

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

   # bucket types

   elsif ($type =~ /$xml_regex$/)
   {
	   $gettext_type="xml";
   }
   elsif ($type =~ /$ini_regex$/)
   {
	   $gettext_type="ini";
   }
   elsif ($type =~ /$tlk_regex$/)
   {
	   $gettext_type="tlk";
   }
   elsif ($type =~ /$buildin_regex$/)
   {
	   $gettext_type="buildin";
   }
   else
   {
	   $gettext_type="unknown";
   }

   return "gettext\/$gettext_type";
}

sub TextFile_DetermineEncoding ($)
{
	my $gettext_code="UTF-8"; # All files are UTF-8 by default
	my $filetype=`file $_ | cut -d ' ' -f 2`;

	if ($? eq "0")
	{
		if ($filetype =~ /^(ISO|UTF)/)
		{
			chomp ($gettext_code = $filetype);
		}
		elsif ($filetype =~ /^XML/)
		{
			$gettext_code="UTF-8"; # We asume that .glade and other .xml files are UTF-8
		}
	}

	return $gettext_code;
}

sub isNotValidMissing
{
	my ($file) = @_;
	my $package_name = "";
	my $version = "";
	$package_name = $varhash{"PACKAGE"} if (defined $varhash{"PACKAGE"});
	$version = $varhash{"VERSION"} if (defined $varhash{"VERSION"});

	return if $file =~ /^\{arch\}\/.*$/;
	return if $file =~ /^$package_name-$version\/.*$/;
}

sub removeFromArray
{
	my ($file, @array) = @_;

	my $i = 0;
	foreach my $potfile (@array) {
		delete $array[$i] if $potfile =~ m/$file/;
		$i++;
	}
}

sub AddFileToListIfMissing
{
	my ($file, $list) = @_;

	my $name_pattern;
	if ($file =~ /^\.\.\//) {
		$name_pattern = "x3 A*";
	} else {
		$name_pattern = "A*";
	}

	my $file_name = unpack($name_pattern, $file);
	if (defined isNotValidMissing ($file_name)) {
		## Remove the first 3 chars if needed and add newline
		push @$list, $file_name . "\n";
	}
}

sub FindLeftoutFiles
{
	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,
		@buf_potfiles_ignore_sorted
	);

	## Search and find all translatable files
	find sub {
		# Ignore hidden files
		return if "$File::Find::name" =~ /\/\./;
		push @buf_i18n_plain,		 "$File::Find::name" if /\.($buildin_gettext_support)$/;
		push @buf_i18n_xml, 		 "$File::Find::name" if /\.($xml_support)$/;
		push @buf_i18n_ini, 		 "$File::Find::name" if /\.($ini_support)$/;
		push @buf_i18n_xml_unmarked, "$File::Find::name" if /\.(schemas(\.in)+)$/;
		}, "..";
	find sub {
		# Ignore hidden files
		return if "$File::Find::name" =~ /\/\.[^.]/;
		push @buf_i18n_plain,		 "$File::Find::name" if /\.($buildin_gettext_support)$/;
		push @buf_i18n_xml, 		 "$File::Find::name" if /\.($xml_support)$/;
		push @buf_i18n_ini, 		 "$File::Find::name" if /\.($ini_support)$/;
		push @buf_i18n_xml_unmarked, "$File::Find::name" if /\.(schemas(\.in)+)$/;
		}, "$SRCDIR/.." if "$SRCDIR" ne ".";

	open POTFILES, $POTFILES_in or die "$PROGRAM:  there's no POTFILES.in!\n";
	@buf_potfiles = grep !/^(#|\s*$)/, <POTFILES>;
	close POTFILES;

	foreach (@buf_potfiles) {
		s/^\[.*]\s*//;
	}

	print "Searching for missing translatable files...\n" if $VERBOSE;

	## Check if we should ignore some found files, when
	## comparing with POTFILES.in
	foreach my $ignore ("POTFILES.skip", "POTFILES.ignore")
	{
		(-s "$SRCDIR/$ignore") or next;

		if ("$ignore" eq "POTFILES.ignore")
		{
			print "The usage of POTFILES.ignore is deprecated. Please consider moving the\n".
				  "content of this file to POTFILES.skip.\n";
		}

		print "Found $ignore: Ignoring files...\n" if $VERBOSE;
		open FILE, "<$SRCDIR/$ignore" or die "ERROR: Failed to open $SRCDIR/$ignore!\n";

		while (<FILE>)
		{
			next if (/^$/);
			next if (/^(#|\s*$)/);

			my $skipdir = "../$_";
			$skipdir = "$SRCDIR/../$_" if "$SRCDIR" ne ".";
			$skipdir =~ s/\n//g;

			my @dirignored;

			if (-d "$skipdir")
			{
				find sub {
					push @dirignored, "$File::Find::name" if /\.($buildin_gettext_support)$/;
					push @dirignored, "$File::Find::name" if /\.($xml_support)$/;
					push @dirignored, "$File::Find::name" if /\.($ini_support)$/;
					push @dirignored, "$File::Find::name" if /\.(schemas(\.in)+)$/;
				}, "$skipdir";
				foreach my $ignored (@dirignored)
				{
					$ignored =~ s/^$SRCDIR\///g;
					$ignored =~ s/^..\///g;
					$ignored =~ s/$/\n/g;

					removeFromArray ($ignored, @buf_i18n_plain);
					removeFromArray ($ignored, @buf_i18n_xml);
					removeFromArray ($ignored, @buf_i18n_ini);
					removeFromArray ($ignored, @buf_i18n_xml_unmarked);
					push @buf_potfiles_ignore, $ignored;
				}
				next;
			}
			removeFromArray ($_, @buf_i18n_plain);
			removeFromArray ($_, @buf_i18n_xml);
			removeFromArray ($_, @buf_i18n_ini);
			removeFromArray ($_, @buf_i18n_xml_unmarked);
			push @buf_potfiles_ignore, $_;
		}
		close FILE;

		@buf_potfiles_ignore_sorted = sort (@buf_potfiles_ignore);
	}

	foreach my $file (@buf_i18n_plain)
	{
		my $in_comment = 0;
		my $in_macro = 0;
		my $in_string = 0;
		my @multiline_quotes;
		if ($file =~ /\.scm/) {
			@multiline_quotes = ('"');
		} else {
			@multiline_quotes = ("'''", '"""');
		}

		open FILE, "<$file";
		while (<FILE>)
		{
			if ($file =~ /\.scm/) {
				# Strip single quotes from .scm files.
				s-\'--g;
			}

			# Handle continued multi-line comment.
			if ($in_comment)
			{
				next unless s-.*\*/--;
				$in_comment = 0;
			}

			# Handle continued multi-line string.
			if ($in_string)
			{
				my $pattern = join '|', @multiline_quotes;
				if (!s/.*$pattern//) {
					s///s;
					next;
				};
				$in_string = 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-//.*--;
				}
				elsif (grep($match, @multiline_quotes))
				{
					if (!s-$match(\\$match|[^$match])*$match-QUOTEDTEXT-g)
					{
						s-$match.*-QUOTEDTEXT-s;
						$in_string = 1;
					}
				}
				else # ' or "
				{
					s-$match(\\$match|[^$match])*$match-QUOTEDTEXT-g;

					# Handle inline # comments.
					s/^([^$match]+)\#.*/$1/;

					if (m-$match-)
					{
						warn "mismatched quotes at line $. in $file\n";
						s-$match.*--;
					}
				}
			}

			if (/\w\.GetString *\(QUOTEDTEXT/)
			{
				AddFileToListIfMissing($file, \@buf_allfiles);
				last;
			}

			## C_ N_ NC_ Q_ and _ are the macros defined in gi8n.h
			if (/(NC_|[NCQ]_|[^_]_|(^|$)[_]) *\(?QUOTEDTEXT/m)
			{
				AddFileToListIfMissing($file, \@buf_allfiles);
				last;
			}

			# Check for direct calls to the glib gettext wrappers
			if (/g_d[np]?gettext[2]? *\(QUOTEDTEXT/)
			{
				AddFileToListIfMissing($file, \@buf_allfiles);
				last;
			}
		}
		close FILE;
	}

	foreach my $file (@buf_i18n_xml)
	{
		open FILE, "<$file";

		while (<FILE>)
		{
			# FIXME: share the pattern matching code with intltool-extract
			if (/\s_[-A-Za-z0-9._:]+\s*=\s*\"([^"]+)\"/ || /<_[^>]+>/ || /translatable=\"yes\"/)
			{
				AddFileToListIfMissing($file, \@buf_allfiles);
				last;
			}
		}
		close FILE;
	}

	foreach my $file (@buf_i18n_ini)
	{
		open FILE, "<$file";
		while (<FILE>)
		{
			if (/_(.*)=/)
			{
				AddFileToListIfMissing($file, \@buf_allfiles);
				last;
			}
		}
		close FILE;
	}

	foreach my $file (@buf_i18n_xml_unmarked)
	{
		AddFileToListIfMissing($file, \@buf_allfiles);
	}


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

	my %in2;
	foreach (@buf_potfiles_sorted)
	{
		s#^$SRCDIR/../##;
		s#^$SRCDIR/##;
		$in2{$_} = 1;
	}

	foreach (@buf_potfiles_ignore_sorted)
	{
		s#^$SRCDIR/../##;
		s#^$SRCDIR/##;
		$in2{$_} = 1;
	}

	my @result;

	foreach (@buf_allfiles_sorted)
	{
		my $dummy = $_;
		my $srcdir = $SRCDIR;

		$srcdir =~ s#^../##;
		$dummy =~ s#^$srcdir/../##;
		$dummy =~ s#^$srcdir/##;
		$dummy =~ s#_build/##;
		if (!exists($in2{$dummy}))
		{
			push @result, $dummy
		}
	}

	my @buf_potfiles_notexist;

	foreach (@buf_potfiles_sorted)
	{
		chomp (my $dummy = $_);
		if ("$dummy" ne "" and !(-f "$SRCDIR/../$dummy" or -f "../$dummy"))
		{
			push @buf_potfiles_notexist, $_;
		}
	}

	## Save file with information about the files missing
	## if any, and give information about this procedure.
	if (@result + @buf_potfiles_notexist > 0)
	{
		if (@result)
		{
			print "\n" if $VERBOSE;
			unlink "missing";
			open OUT, ">missing";
			print OUT @result;
			close OUT;
			warn "The following files contain translations and are currently not in use. Please\n".
				 "consider adding these to the POTFILES.in file, located in the po/ directory.\n\n";
			print STDERR @result, "\n";
			warn "If some of these files are left out on purpose then please add them to\n".
				 "POTFILES.skip instead of POTFILES.in. A file 'missing' containing this list\n".
				 "of left out files has been written in the current directory.\n";
			warn "Please report to ". $varhash{"PACKAGE_BUGREPORT"} ."\n" if (defined $varhash{"PACKAGE_BUGREPORT"});
		}
		if (@buf_potfiles_notexist)
		{
			unlink "notexist";
			open OUT, ">notexist";
			print OUT @buf_potfiles_notexist;
			close OUT;
			warn "\n" if ($VERBOSE or @result);
			warn "The following files do not exist anymore:\n\n";
			warn @buf_potfiles_notexist, "\n";
			warn "Please remove them from POTFILES.in. A file 'notexist'\n".
				"containing this list of absent files has been written in the current directory.\n";
			warn "Please report to ". $varhash{"PACKAGE_BUGREPORT"} ."\n" if (defined $varhash{"PACKAGE_BUGREPORT"});
		}
	}

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

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

sub isProgramInPath
{
	my ($file) = @_;
	# If a file is executable (or exists on Windows),
	# or when it returns 0 exit status.
	return 1 if (
		((-x $file) or ($^O eq 'MSWin32' and (-e $file))) or
		(system("$file --version >$devnull") == 0));
	return 0;
}

sub isGNUGettextTool
{
	my ($file) = @_;
	# Check that we are using GNU gettext tools
	if (isProgramInPath ($file))
	{
		my $version = `$file --version`;
		return 1 if ($version =~ m/.*\(GNU .*\).*/);
	}
	return 0;
}

sub GenerateHeaders
{
	my $EXTRACT = $ENV{"INTLTOOL_EXTRACT"} || "intltool-extract";

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

		while (<FILE>)
		{
		   chomp;
		   next if /^\[\s*encoding/;

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

		   my $gettext_type= &POFile_DetermineType ($1);

		   if (/\.($xml_support|$ini_support|$tlk_support)$/ || /^\[/)
		   {
			   s/^\[[^\[].*]\s*//;

			   my @cmd = ($EXTRACT, "--update", "--type=$gettext_type",
						  "--srcdir=$SRCDIR");

			   unshift (@cmd, $^X) if ($^O eq 'MSWin32' && !($EXTRACT =~ /perl/));

			   push (@cmd, "--quiet") if (! $VERBOSE);
			   push (@cmd, "../$_");

			   system (@cmd);
		   }
	   }
	   close FILE;
   }
}

#
# Generate .pot file from POTFILES.in
#
sub GeneratePOTemplate
{
	my $XGETTEXT = $ENV{"XGETTEXT"} || "xgettext";
	my $XGETTEXT_ARGS = $ENV{"XGETTEXT_ARGS"} || '';
	chomp $XGETTEXT;

	if (! isGNUGettextTool ("$XGETTEXT"))
	{
		print STDERR " *** GNU xgettext is not found on this system!\n".
					 " *** Without it, intltool-update can not extract strings.\n";
		exit;
	}

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

	open INFILE, $POTFILES_in;
	unlink "POTFILES.in.temp";
	open OUTFILE, ">POTFILES.in.temp" or die("Cannot open POTFILES.in.temp for writing");

	my $gettext_support_nonascii = 0;

	# checks for GNU gettext >= 0.12
	my $dummy = `$XGETTEXT --version --from-code=UTF-8 >$devnull 2>$devnull`;
	if ($? == 0)
	{
		$gettext_support_nonascii = 1;
	}
	else
	{
		# require gnu gettext >= 0.12
		die "$PROGRAM: GNU gettext >= 0.12 is required for intltool\n";
	}

	my $encoding = "UTF-8";
	my $forced_gettext_code;
	my @temp_headers;
	my $encoding_problem_is_reported = 0;

	while (<INFILE>)
	{
		next if (/^#/ or /^\s*$/);

		chomp;

		my $gettext_code;

		if (/^\[\s*encoding:\s*(.*)\s*\]/)
		{
			$forced_gettext_code=$1;
		}
		elsif (/\.($xml_support|$ini_support|$tlk_support)$/ || /^\[/)
		{
			s/^\[.*]\s*//;
			print OUTFILE "../$_.h\n";
			push @temp_headers, "../$_.h";
			$gettext_code = &TextFile_DetermineEncoding ("../$_.h") if ($gettext_support_nonascii and not defined $forced_gettext_code);
		}
		else
		{
			print OUTFILE "$SRCDIR/../$_\n";
			$gettext_code = &TextFile_DetermineEncoding ("$SRCDIR/../$_") if ($gettext_support_nonascii and not defined $forced_gettext_code);
		}

		next if (! $gettext_support_nonascii);

		if (defined $forced_gettext_code)
		{
			$encoding=$forced_gettext_code;
		}
		elsif (defined $gettext_code and "$encoding" ne "$gettext_code")
		{
			if ($encoding eq "ASCII")
			{
				$encoding=$gettext_code;
			}
			elsif ($gettext_code ne "ASCII")
			{
				# Only report once because the message is quite long
				if (! $encoding_problem_is_reported)
				{
					print STDERR "WARNING: You should use the same file encoding for all your project files,\n".
								 "		   but $PROGRAM thinks that most of the source files are in\n".
								 "		   $encoding encoding, while \"$_\" is (likely) in\n".
								 "		   $gettext_code encoding. If you are sure that all translatable strings\n".
								 "		   are in same encoding (say UTF-8), please *prepend* the following\n".
								 "		   line to POTFILES.in:\n\n".
								 "				   [encoding: UTF-8]\n\n".
								 "		   and make sure that configure.in/ac checks for $PACKAGE >= 0.27 .\n".
								 "(such warning message will only be reported once.)\n";
					$encoding_problem_is_reported = 1;
				}
			}
		}
	}

	close OUTFILE;
	close INFILE;

	unlink "$MODULE.pot";
	my @xgettext_argument=("$XGETTEXT",
						   "--add-comments",
						   "--directory\=.",
						   "--default-domain\=$MODULE",
						   "--flag\=g_strdup_printf:1:c-format",
						   "--flag\=g_string_printf:2:c-format",
						   "--flag\=g_string_append_printf:2:c-format",
						   "--flag\=g_error_new:3:c-format",
						   "--flag\=g_set_error:4:c-format",
						   "--flag\=g_markup_printf_escaped:1:c-format",
						   "--flag\=g_log:3:c-format",
						   "--flag\=g_print:1:c-format",
						   "--flag\=g_printerr:1:c-format",
						   "--flag\=g_printf:1:c-format",
						   "--flag\=g_fprintf:2:c-format",
						   "--flag\=g_sprintf:2:c-format",
						   "--flag\=g_snprintf:3:c-format",
						   "--flag\=g_scanner_error:2:c-format",
						   "--flag\=g_scanner_warn:2:c-format",
						   "--output\=$MODULE\.pot",
						   "--files-from\=\.\/POTFILES\.in\.temp");
	my $XGETTEXT_KEYWORDS = &FindPOTKeywords;
	push @xgettext_argument, $XGETTEXT_KEYWORDS;
	my $MSGID_BUGS_ADDRESS = &FindMakevarsBugAddress;
	push @xgettext_argument, "--msgid-bugs-address\=\"$MSGID_BUGS_ADDRESS\"" if $MSGID_BUGS_ADDRESS;
	push @xgettext_argument, "--from-code\=$encoding" if ($gettext_support_nonascii);
	push @xgettext_argument, $XGETTEXT_ARGS if $XGETTEXT_ARGS;
	my $xgettext_command = join ' ', @xgettext_argument;

	# intercept xgettext error message
	print "Running $xgettext_command\n" if $VERBOSE;
	my $xgettext_error_msg = `$xgettext_command 2>\&1`;
	my $command_failed = $?;

	unlink "POTFILES.in.temp";

	print "Removing generated header (.h) files..." if $VERBOSE;
	unlink foreach (@temp_headers);
	print "done.\n" if $VERBOSE;

	if (! $command_failed)
	{
		if (! -e "$MODULE.pot")
		{
			print "None of the files in POTFILES.in contain strings marked for translation.\n" if $VERBOSE;
		}
		else
		{
			print "Wrote $MODULE.pot\n" if $VERBOSE;
		}
	}
	else
	{
		if ($xgettext_error_msg =~ /--from-code/)
		{
			my $errlocation = "unknown";

			if ($xgettext_error_msg =~ /Non-ASCII string at (.*)\..*/)
			{
				$errlocation = $1;
			}
			print STDERR "ERROR: xgettext failed to generate PO template file because the following 	\n".
						 "		 file contains strings marked for translation, not encoded in UTF-8.	\n".
						 "		 Please ensure all strings marked for translation are UTF-8 encoded.  \n\n".
						 "			 $errlocation\n\n";
		}
		else
		{
			print STDERR "$xgettext_error_msg";
			if (-e "$MODULE.pot")
			{
				# is this possible?
				print STDERR "ERROR: xgettext failed but still managed to generate PO template file.\n".
							 "		 Please consult error message above if there is any.\n";
			}
			else
			{
				print STDERR "ERROR: xgettext failed to generate PO template file. Please consult\n".
							 "		 error message above if there is any.\n";
			}
		}
		exit (1);
	}
}

sub POFile_Update
{
	-f "$MODULE.pot" or die "$PROGRAM: $MODULE.pot does not exist.\n";

	my $MSGMERGE = $ENV{"MSGMERGE"} || "msgmerge";
	my ($lang, $outfile) = @_;

	if (! isGNUGettextTool ("$MSGMERGE"))
	{
		print STDERR " *** GNU msgmerge is not found on this system!\n".
					 " *** Without it, intltool-update can not extract strings.\n";
		exit;
	}

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

	my $infile = "$SRCDIR/$lang.po";
	$outfile = "$SRCDIR/$lang.po" if ($outfile eq "");

	# I think msgmerge won't overwrite old file if merge is not successful
	system ("$MSGMERGE", "--no-fuzzy-matching", "--width=100", "-o", $outfile, $infile, "$MODULE.pot");

	# remove the "messages" trash file generated by gettext
	unlink "messages";
	unlink "messages.mo";
}

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

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

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

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

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

sub POFile_GetLanguage ($)
{
	s/^(.*\/)?(.+)\.po$/$2/;
	return $_;
}

sub Console_Write_TranslationStatus
{
	my ($lang, $output_file) = @_;
	my $MSGFMT = $ENV{"MSGFMT"} || "msgfmt";

	if (! isGNUGettextTool ("$MSGFMT"))
	{
		print STDERR " *** GNU msgfmt is not found on this system!\n".
					 " *** Without it, intltool-update can not extract strings.\n";
		exit;
	}

	$output_file = "$SRCDIR/$lang.po" if ($output_file eq "");

	system ("$MSGFMT", "-o", "$devnull", "--verbose", $output_file);
}

sub Console_Write_CoverageReport
{
	my $MSGFMT = $ENV{"MSGFMT"} || "msgfmt";

	if (! isGNUGettextTool ("$MSGFMT"))
	{
		print STDERR " *** GNU msgfmt is not found on this system!\n".
					 " *** Without it, intltool-update can not extract strings.\n";
		exit;
	}

	&GatherPOFiles;

	foreach my $lang (@languages)
	{
		print STDERR "$lang: ";
		&POFile_Update ($lang, "");
	}

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

	foreach my $lang (@languages)
	{
		print STDERR "$lang: ";
		system ("$MSGFMT", "-o", "$devnull", "--verbose", "$SRCDIR/$lang.po");
	}
}

sub SubstituteVariable
{
	my ($str) = @_;

	# always need to rewind file whenever it has been accessed
	seek (CONF, 0, 0);

	# cache each variable. varhash is global to we can add
	# variables elsewhere.
	while (<CONF>)
	{
		if (/^(\w+)=(.*)$/)
		{
			($varhash{$1} = $2) =~	s/^["'](.*)["']$/$1/;
		}
	}

	if ($str =~ /^(.*)\$\{?([A-Z_]+)\}?(.*)$/)
	{
		my $rest = $3;
		my $untouched = $1;
		my $sub = "";
		# Ignore recursive definitions of variables
		$sub = $varhash{$2} if defined $varhash{$2} and $varhash{$2} !~ /\$\{?$2\}?/;

		return SubstituteVariable ("$untouched$sub$rest");
	}

	# We're using Perl backticks ` and "echo -n" here in order to
	# expand any shell escapes (such as backticks themselves) in every variable
	return echo_n ($str);
}

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

	my ($conf_in, $src_dir);

	if ($base_dirname =~ /^po(-.+)?$/)
	{
		if (-f "Makevars")
		{
			my $makefile_source;

			local (*IN);
			open (IN, "<Makevars") || die "can't open Makevars: $!";

			while (<IN>)
			{
				if (/^top_builddir[ \t]*=/)
				{
					$src_dir = $_;
					$src_dir =~ s/^top_builddir[ \t]*=[ \t]*([^ \t\n\r]*)/$1/;

					chomp $src_dir;
					if (-f "$src_dir" . "/configure.ac") {
						$conf_in = "$src_dir" . "/configure.ac" . "\n";
					} else {
						$conf_in = "$src_dir" . "/configure.in" . "\n";
					}
					last;
				}
			}
			close IN;

			$conf_in || die "Cannot find top_builddir in Makevars.";
		}
		elsif (-f "$SRCDIR/../configure.ac")
		{
			$conf_in = "$SRCDIR/../configure.ac";
		}
		elsif (-f "$SRCDIR/../configure.in")
		{
			$conf_in = "$SRCDIR/../configure.in";
		}
		else
		{
			my $makefile_source;

			local (*IN);
			open (IN, "<Makefile") || return;

			while (<IN>)
			{
				if (/^top_srcdir[ \t]*=/)
				{
					$src_dir = $_;
					$src_dir =~ s/^top_srcdir[ \t]*=[ \t]*([^ \t\n\r]*)/$1/;

					chomp $src_dir;
					$conf_in = "$src_dir" . "/configure.in" . "\n";

					last;
				}
			}
			close IN;

			$conf_in || die "Cannot find top_srcdir in Makefile.";
		}

		open (CONF, "<$conf_in");
	}
	else
	{
		print STDERR "$PROGRAM: Unable to proceed.\n" .
					 "Make sure to run this script inside the po directory.\n";
		exit;
	}
}

sub FindPackageName
{
	my $version;
	my $domain = &FindMakevarsDomain;
	my $name = $domain || "untitled";
	my $bugurl;

	&CONF_Handle_Open;

	my $conf_source; {
		local (*IN);
		open (IN, "<&CONF") || return $name;
		seek (IN, 0, 0);
		local $/; # slurp mode
		$conf_source = <IN>;
		close IN;
	}

	# priority for getting package name:
	# 1. GETTEXT_PACKAGE
	# 2. first argument of AC_INIT (with >= 2 arguments)
	# 3. first argument of AM_INIT_AUTOMAKE (with >= 2 argument)

	# /^AM_INIT_AUTOMAKE\([\s\[]*([^,\)\s\]]+)/m
	# the \s makes this not work, why?
	if ($conf_source =~ /^AM_INIT_AUTOMAKE\(([^,\)]+),([^,\)]+)/m)
	{
		($name, $version) = ($1, $2);
		$name	 =~ s/[\[\]\s]//g;
		$version =~ s/[\[\]\s]//g;
		$name	 =~ s/\(+$//g;
		$version =~ s/\(+$//g;

		$varhash{"PACKAGE_NAME"} = $name if (not $name =~ /\$\{?AC_PACKAGE_NAME\}?/);
		$varhash{"PACKAGE"} = $name if (not $name =~ /\$\{?PACKAGE\}?/);
		$varhash{"PACKAGE_VERSION"} = $version if (not $name =~ /\$\{?AC_PACKAGE_VERSION\}?/);
		$varhash{"VERSION"} = $version if (not $name =~ /\$\{?VERSION\}?/);
	}

	if ($conf_source =~ /^AC_INIT\(([^,\)]+),([^,\)]+)[,]?([^,\)]+)?/m)
	{
		($name, $version) = ($1, $2);
		$bugurl = $3 if (defined $3);

		# Handle m4_esyscmd
		# FIXME: We should do this in a more generic way that works for all vars
		if ($version =~ /m4_esyscmd\([\[]?([^\)\]]+)/)
		{
			my $cwd = getcwd ();
			chdir ("$SRCDIR/..");
			$version = qx($1);
			chdir ($cwd);
		}


		$name	 =~ s/[\[\]\s]//g;
		$version =~ s/[\[\]\s]//g;
		$bugurl  =~ s/[\[\]\s]//g if (defined $bugurl);
		$name	 =~ s/\(+$//g;
		$version =~ s/\(+$//g;
		$bugurl  =~ s/\(+$//g if (defined $bugurl);

		$varhash{"PACKAGE_NAME"} = $name if (not $name =~ /\$\{?AC_PACKAGE_NAME\}?/);
		$varhash{"PACKAGE"} = $name if (not $name =~ /\$\{?PACKAGE\}?/);
		$varhash{"PACKAGE_VERSION"} = $version if (not $name =~ /\$\{?AC_PACKAGE_VERSION\}?/);
		$varhash{"VERSION"} = $version if (not $name =~ /\$\{?VERSION\}?/);
		$varhash{"PACKAGE_BUGREPORT"} = $bugurl if (defined $bugurl and not $bugurl =~ /\$\{?\w+\}?/);
	}

	# \s makes this not work, why?
	$name = $1 if $conf_source =~ /^GETTEXT_PACKAGE=\[?([^\n\]]+)/m;

	# m4 macros AC_PACKAGE_NAME, AC_PACKAGE_VERSION etc. have same value
	# as corresponding $PACKAGE_NAME, $PACKAGE_VERSION etc. shell variables.
	$name =~ s/\bAC_PACKAGE_/\$PACKAGE_/g;

	$name = $domain if $domain;

	$name = SubstituteVariable ($name);
	$name =~ s/^["'](.*)["']$/$1/;

	return $name if $name;
}


sub FindPOTKeywords
{

	my $keywords = "--keyword=_ --keyword=N_ --keyword=C_:1c,2 --keyword=NC_:1c,2 --keyword=Q_ --keyword=g_dgettext:2 --keyword=g_dngettext:2,3 --keyword=g_dpgettext:2 --keyword=g_dpgettext2=2c,3";
	my $varname = "XGETTEXT_OPTIONS";
	my $make_source; {
		local (*IN);
		open (IN, "<Makevars") || (open(IN, "<Makefile.in.in") && ($varname = "XGETTEXT_KEYWORDS")) || return $keywords;
		seek (IN, 0, 0);
		local $/; # slurp mode
		$make_source = <IN>;
		close IN;
	}

	# unwrap lines split with a trailing \
	$make_source =~  s/\\ $ \n/ /mxg;
	$keywords = $1 if $make_source =~ /^$varname[ ]*=\[?([^\n\]]+)/m;

	return $keywords;
}

sub FindMakevarsDomain
{

	my $domain = "";
	my $makevars_source; {
		local (*IN);
		open (IN, "<Makevars") || return $domain;
		seek (IN, 0, 0);
		local $/; # slurp mode
		$makevars_source = <IN>;
		close IN;
	}

	$domain = $1 if $makevars_source =~ /^DOMAIN[ ]*=\[?([^\n\]\$]+)/m;
	$domain =~ s/^\s+//;
	$domain =~ s/\s+$//;

	return $domain;
}

sub FindMakevarsBugAddress
{

	my $address = "";
	my $makevars_source; {
		local (*IN);
		open (IN, "<Makevars") || return undef;
		seek (IN, 0, 0);
		local $/; # slurp mode
		$makevars_source = <IN>;
		close IN;
	}

	$address = $1 if $makevars_source =~ /^MSGID_BUGS_ADDRESS[ ]*=\[?([^\n\]\$]+)/m;
	$address =~ s/^\s+//;
	$address =~ s/\s+$//;

	return $address;
}
