Improved javascript template string expression extracting

[gitaarik]

Add option parse_template_string that improves parsing of javascript templates expressions, like:

`${gettext('my text')}`

And it also works with nested expressions like:

${`some text ${gettext('my text')} more text`}

You have to enable template string extraction with an option in the option_map:

extract_from_dir(
    # ...
    options_map={
        '**': {'parse_template_string': True}
    }
)

Then it should work.

[gitaarik]

Hi @akx . I've been working on this feature for a while. In my setup I need these changes. However I have some problems when using my own fork in my project. So I have some questions regarding using a fork of babel in my project, and also what needs to be done to get this merged, so I don't have to use my fork anymore.

In my project, which uses Pipenv. Inside the Pipfile, I use a VCS descriptor to specify my python-babel fork:

babel = {editable = true, ref = "javascript-improvements-1", git = "https://github.com/gitaarik/babel"}

This works partly. When I run python-babel's babel.messages.extract.extract_from_dir, it finds gettext() functions that it didn't found before.

However, when I run my Django devserver, on some requests (not all of them, I'm not sure yet why it only happens on some requests), the request fails with a exception coming from python-babel:

RuntimeError: The babel data files are not available. This usually happens because you are using a source checkout from Babel and you did not build the data files.  Just make sure to run "python setup.py import_cldr" before installing the library.

I noticed that when I go into the virtualenv directory (which is created by Pipenv and can be retrieved with pipenv --venv) and then from there go to src/babel/, I can run the command python setup.py import_cld to generate the locale files and then it seems to work.

I will have to look into the possibilities to integrate this in my project in a way that the locale files would be generated when I build and deploy my project. In the meantime it would be good for us if the changes would eventually be merged into the official package.

So I have two questions:

• Are there easier ways of using my fork in my project, for development and deployment?
• What would be needed to get these changes merged into the official package, so that we don't have to make things complicated with a fork?

[akx]

Hi @gitaarik, sorry for the latency. I had somehow inadvertently turned all notifications about Babel off (or maybe had just dropped the ball on this one).

Could you rebase this on master and maybe add a test that shows how this works?

[johanneswilm]

Beyond the other comments, I'd appreciate some tests :)

Tests have been added in #939.