Locale::Maketext::ExtrUser3Contributed Perl DocumeLocale::Maketext::Extract(3)NAME
Locale::Maketext::Extract - Extract translatable strings from source
SYNOPSIS
my $Ext = Locale::Maketext::Extract->new;
$Ext->read_po('messages.po');
$Ext->extract_file($_) for <*.pl>;
# Set $entries_are_in_gettext_format if the .pl files above use
# loc('%1') instead of loc('[_1]')
$Ext->compile($entries_are_in_gettext_format);
$Ext->write_po('messages.po');
-----------------------------------
### Specifying parser plugins ###
my $Ext = Locale::Maketext::Extract->new(
# Specify which parser plugins to use
plugins => {
# Use Perl parser, process files with extension .pl .pm .cgi
perl => [],
# Use YAML parser, process all files
yaml => ['*'],
# Use TT2 parser, process files with extension .tt2 .tt .html
# or which match the regex
tt2 => [
'tt2',
'tt',
'html',
qr/\.tt2?\./
],
# Use My::Module as a parser for all files
'My::Module' => ['*'],
},
# Warn if a parser can't process a file or problems loading a plugin
warnings => 1,
# List processed files
verbose => 1,
);
DESCRIPTION
This module can extract translatable strings from files, and write them
back to PO files. It can also parse existing PO files and merge their
contents with newly extracted strings.
A command-line utility, xgettext.pl, is installed with this module as
well.
The format parsers are loaded as plugins, so it is possible to define
your own parsers.
Following formats of input files are supported:
Perl source files (plugin: perl)
Valid localization function names are: "translate", "maketext",
"gettext", "loc", "x", "_" and "__".
For a slightly more accurate, but much slower Perl parser, you can
use the PPI plugin. This does not have a short name (like "perl"),
but must be specified in full.
HTML::Mason (Mason 1) and Mason (Mason 2) (plugin: mason)
HTML::Mason (aka Mason 1)
Strings inside <&|/l>...</&> and <&|/loc>...</&> are extracted.
Mason (aka Mason 2) Strings inside <% $.floc { %>...</%> or <% $.fl
{ %>...</%> or <% $self->floc { %>...</%> or <% $self->fl {
%>...</%> are extracted.
Template Toolkit (plugin: tt2)
Valid forms are:
[% | l(arg1,argn) %]string[% END %]
[% 'string' | l(arg1,argn) %]
[% l('string',arg1,argn) %]
FILTER and | are interchangeable
l and loc are interchangeable
args are optional
Text::Template (plugin: text)
Sentences between "STARTxxx" and "ENDxxx" are extracted
individually.
YAML (plugin: yaml)
Valid forms are _"string" or _'string', eg:
title: _"My title"
desc: _'My "quoted" string'
Quotes do not have to be escaped, so you could also do:
desc: _"My "quoted" string"
HTML::FormFu (plugin: formfu)
HTML::FormFu uses a config-file to generate forms, with built in
support for localizing errors, labels etc.
We extract the text after "_loc: ":
content_loc: this is the string
message_loc: ['Max string length: [_1]', 10]
Generic Template (plugin: generic)
Strings inside {{...}} are extracted.
METHODS
Constructor
new()
new(
plugins => {...},
warnings => 1 | 0,
verbose => 0 | 1 | 2 | 3,
)
See "Plugins", "Warnings" and "Verbose" for details
Plugins
$ext->plugins({...});
Locale::Maketext::Extract uses plugins (see below for the list) to
parse different formats.
Each plugin can also specify which file types it can parse.
# use only the YAML plugin
# only parse files with the default extension list defined in the plugin
# ie .yaml .yml .conf
$ext->plugins({
yaml => [],
})
# use only the Perl plugin
# parse all file types
$ext->plugins({
perl => '*'
})
$ext->plugins({
tt2 => [
'tt', # matches base filename against /\.tt$/
qr/\.tt2?\./, # matches base filename against regex
\&my_filter, # codref called
]
})
sub my_filter {
my ($base_filename,$path_to_file) = @_;
return 1 | 0;
}
# Specify your own parser
# only parse files with the default extension list defined in the plugin
$ext->plugins({
'My::Extract::Parser' => []
})
By default, if no plugins are specified, then it uses all of the
builtin plugins, and overrides the file types specified in each plugin
- instead, each plugin is tried for every file.
Available plugins
"perl" : Locale::Maketext::Extract::Plugin::Perl
For a slightly more accurate but much slower Perl parser, you can
use the PPI plugin. This does not have a short name, but must be
specified in full, ie: Locale::Maketext::Extract::Plugin::PPI
"tt2" : Locale::Maketext::Extract::Plugin::TT2
"yaml" : Locale::Maketext::Extract::Plugin::YAML
"formfu" : Locale::Maketext::Extract::Plugin::FormFu
"mason" : Locale::Maketext::Extract::Plugin::Mason
"text" : Locale::Maketext::Extract::Plugin::TextTemplate
"generic" : Locale::Maketext::Extract::Plugin::Generic
Also, see Locale::Maketext::Extract::Plugin::Base for details of how to
write your own plugin.
Warnings
Because the YAML and TT2 plugins use proper parsers, rather than just
regexes, if a source file is not valid and it is unable to parse the
file, then the parser will throw an error and abort parsing.
The next enabled plugin will be tried.
By default, you will not see these errors. If you would like to see
them, then enable warnings via new(). All parse errors will be printed
to STDERR.
Also, if developing your own plugin, turn on warnings to see any errors
that result from loading your plugin.
Verbose
If you would like to see which files have been processed, which plugins
were used, and which strings were extracted, then enable "verbose". If
no acceptable plugin was found, or no strings were extracted, then the
file is not listed:
$ext = Locale::Extract->new( verbose => 1 | 2 | 3);
OR
xgettext.pl ... -v # files reported
xgettext.pl ... -v -v # files and plugins reported
xgettext.pl ... -v -v -v # files, plugins and strings reported
Accessors
header, set_header
lexicon, set_lexicon, msgstr, set_msgstr
entries, set_entries, entry, add_entry, del_entry
compiled_entries, set_compiled_entries, compiled_entry,
add_compiled_entry, del_compiled_entry
clear
PO File manipulation
method read_po ($file)
method write_po ($file, $add_format_marker?)
Extraction
extract
extract_file
Compilation
compile($entries_are_in_gettext_style?)
Merges the "entries" into "compiled_entries".
If $entries_are_in_gettext_style is true, the previously extracted
entries are assumed to be in the Gettext style (e.g. %1).
Otherwise they are assumed to be in Maketext style (e.g. "[_1]") and
are converted into Gettext style before merging into
"compiled_entries".
The "entries" are not cleared after each compilation; use
"-"set_entries()> to clear them if you need to extract from sources
with varying styles.
normalize_space
Lexicon accessors
msgids, has_msgid,
msgstr, set_msgstr
msg_positions, msg_variables, msg_format, msg_out
Internal utilities
_default_header
_maketext_to_gettext
_escape
_format
ACKNOWLEDGMENTS
Thanks to Jesse Vincent for contributing to an early version of this
module.
Also to Alain Barbet, who effectively re-wrote the source parser with a
flex-like algorithm.
SEE ALSO
xgettext.pl, Locale::Maketext, Locale::Maketext::Lexicon
AUTHORS
Audrey Tang <cpan@audreyt.org>
COPYRIGHT
Copyright 2003-2008 by Audrey Tang <cpan@audreyt.org>.
This software is released under the MIT license cited below.
The "MIT" License
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
perl v5.16.2 2011-07-20 Locale::Maketext::Extract(3)
