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Zope3 egg based i18n locales extraction recipes

Project description


This Zope 3 recipes offers different tools which allows to extract i18n translation messages from egg based packages.


2.0 (2023-02-08)

  • Add support for Python 3.9, 3.10, 3.11.

  • Drop support for Python 2.7, 3.5, 3.6.

1.2 (2019-06-25)

  • Fix extraction on Python 3 by requiring a more recent version of

  • Add support for Python 3.8.

  • Drop support for Python 3.4.

1.1 (2019-01-27)

  • Require >= 4.0 to get rid of code copied from there.

  • Add support for Python 3.7.

1.0.0 (2018-01-10)

  • Python 3 compatibility.

0.9.0 (2013-11-02)

  • Depend on zc.buildout 2.0+. Features introduced with zc.buildout 1.5 are removed (don’t work with the 2.x branch).

  • Update trove classifiers to show that this package is currently only compatible with Python 2.7.

0.8.1 (2012-01-06)

  • Exit with a non-zero status code when one or more msgmerge calls fail.

  • Use subprocess instead of os.system.

0.8.0 (2010-10-07)

  • Depend on and use the new features of the zc.buildout 1.5 line. At the same time support for zc.buildout <= 1.5.1 has been dropped.

  • Fixed test setup to run with current zopetoolkit packages. Made sure tests still run on older platforms, particularly Zope 2.12.

  • Using python’s doctest module instead of deprecated zope.testing.doctest.

  • Typo change in configuration: exludeDirNames becomes excludeDirNames (old name is still supported for backward compatibility).

0.7.0 (2010-02-18)

  • Fixed test setup to run with current packages.

  • Added buildout option verify_domain. When set to true i18nextract only retrives the message ids of specified domain from python files. Otherwise (default and previous behavior) all messages ids in all domains in python files are retrieved.

0.6.0 (2009-12-02)

  • Feature: Added new ‘headerTemplate’ option that allows to specify the path of a customized pot header template.

  • Feature: Added new ‘extraPaths` option that is included in the PYTHONPATH. This allows for instance the use with Zope 2.11.

  • Makers are now called with additional keyword arguments.

  • Fixed dependencies: The ‘extract’ extra of is required.

0.5.4 (2009-06-08)

  • Fix bug where zcml_strings collect the same path more then once because it follows the configuration zcml for each package.

  • Fix bug where i18ncompile miscalculated domains containing “.”, everything after the “.” was ignored.

  • The excludeDefaultDomain option actually works now.

0.5.3 (2009-03-12)

  • Fix bug where i18nmerge miscalculated domains containing “.”, everything after the “.” was ignored.

0.5.2 (2009-03-10)

  • Feature: Generate *.po file based on *.pot file if non exists in i18nmerge script

  • Feature: Implemented i18ncompile script which uses msgfmt -o moPath poPath

0.5.1 (2009-02-22)

  • fix tests

  • Updated docs to render nicely when fed to docutils. [ulif]

  • Added zip_safe flag in to avoid meaningless warnings when used with buildout. [ulif]

0.5.0 (2009-09-09)

  • Implemented environment section argument support for script. This is a name of a section which defines a set of environment variables that should be exported before starting the extraction.

  • Initial Release

Detailed Documentation

Translation domain extraction


This Zope 3 recipes offers different tools which allows to extract i18n translation messages from egg based packages.

The ‘i18n’ recipe can be used to generate the required scripts for extract message ids from egg based packages. The i18nmerge allows to merge them into a .po file. And the i18nstats script gives you an overview about the state of the translated files.


This file uses different semantic for the arguments. The script offers to define egg packages instead of one package path. This makes it easy to define eggs as source where we extract the messages from.


The i18n recipe accepts the following options:


The names of one or more eggs, with their dependencies that should be included in the Python path of the generated scripts.


The names of one or more eggs which the messages should get extracted from. Note, this is different to the original implementation. The original implementation uses one path as -d argument which assumes a specific zope.* package structure with an old style trunk setup.


The translation domain.


The path of the output file relative to the package root.


One or more module name which can get used as additional maker. This module must be located in the python path because it get resolved by For a sample maker see z3c.csvvocabulary.csvStrings. Makers are called with these arguments: ‘path’, ‘base_path’, ‘exclude_dirs’, ‘domain’, ‘include_default_domain’ and ‘site_zcml’. The return value has to be a catalog dictionary.

zcml (required)

The contents of configuration used for extraction. Normaly used for load meta configuration. Note: To include a ZCML file outside package, you can use, include directive with file option. For example: <include file="${buildout:directory}/etc/site.zcml" />

excludeDefaultDomain (optional, default=False)

Exclude all messages found as part of the default domain. Messages are in this domain, if their domain could not be determined. This usually happens in page template snippets. (False if not used)

pythonOnly (optional, default=False)

Only extract message ids from Python (False if not used)

verify_domain (optional, default=False)

Retrieve all the messages in all the domains in python files when verify_domain is False otherwise only retrive the messages of the specified domain. (False if not used)

excludeDirectoryName (optional, default=[])

Allows to specify one or more directory name, relative to the package, to exclude. (None if not used)

headerTemplate (optional, default=None)

The path of the pot header template relative to the buildout directory.


A section name defining a set of environment variables that should be exported before starting the tests. Can be used for set product configuration enviroment.


A new line separated list of directories which are added to the PYTHONPATH.


Lets define some (bogus) eggs that we can use in our application:

>>> mkdir('outputDir')
>>> mkdir('demo1')
>>> write('demo1', '',
... '''
... from setuptools import setup
... setup(name = 'demo1')
... ''')
>>> mkdir('demo2')
>>> write('demo2', '',
... '''
... from setuptools import setup
... setup(name = 'demo2', install_requires='demo1')
... ''')

Now check if the setup was correct:

>>> ls('bin')
-  buildout

Lets create a minimal buildout.cfg file:

>>> write('buildout.cfg',
... '''
... [buildout]
... parts = i18n
... offline = true
... [i18n]
... recipe = z3c.recipe.i18n:i18n
... eggs = z3c.recipe.i18n
... packages = demo1
... domain = recipe
... output = outputDir
... zcml = <include package="z3c.recipe.tests" file="extract.zcml" />"
... ''' % globals())

Now, Let’s run the buildout and see what we get:

>>> print(system(join('bin', 'buildout')))
Installing i18n.
i18n: setting up i18n tools
Generated script '/sample-buildout/bin/i18nextract'.
Generated script '/sample-buildout/bin/i18nmergeall'.
Generated script '/sample-buildout/bin/i18nstats'.
Generated script '/sample-buildout/bin/i18ncompile'...

After running buildout, the bin folder contains the different i18n script:

>>> ls('bin')
-  buildout
-  i18ncompile
-  i18nextract
-  i18nmergeall
-  i18nstats

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