ExtractI18n

Read my blog post if you'd like more about the development of ExtractI18n.

CLI helper program to automatically extract bare text strings into Rails I18n interactively.

Useful when adding i18n to a medium/large Rails app.

This Gem supports the following source files:

• Ruby files (controllers, models etc.) via Ruby-Parser, e.g. walking all Ruby Strings
• Slim Views (via Regexp parser by SlimKeyfy (MIT License))
• Vue templates
  • will scan all texts and common string-attributes such as title, alt etc. for static strings and replace with vue-i18n's $t
  • Caveats: because of limitations of the HTML/XML parser it will slightly transform the HTML, for example, self closing tags are expanded (e.g. <Component /> will become <Component></Component>). Also multi-line arrangements of attributes, tags etc. might produce unexpected results, so make sure to use Git and diff the result.
• Vue Pug views
  • Pug is very similar to slim and thus relatively well extractable via Regexp.
• Javascript string Literals by vendoring a small nodeJS script in js/find_string_tokens.js (requires node16+).
  • Vue: Literal strings in script block (via bundled nodejs file)
  • JS/TS: Literal strings
• ERB views
  • by vendoring/extending https://github.com/ProGM/i18n-html_extractor (MIT License)

CURRENTLY THERE IS NO SUPPORT FOR:

• haml ( integrating https://github.com/shaiguitar/haml-i18n-extractor)
• JS: Template-Literals

But I am open to integrating PRs for those!

I strongly recommend using a Source-Code-Management (Git) and i18n-tasks for checking the key consistency. I've created a scanner to make that work with vue $t structures too: https://gist.github.com/zealot128/e6ec1767a40a6c3d85d7f171f4d88293

install:

$ gem install extract_i18n

DO USE A SOURCE-CODE-MANAGEMENT-SYSTEM (Git). There is no guarantee that programm will not destroy your workspace :)

extract-i18n --help

extract-i18n --locale de --yaml config/locales/unsorted.de.yml app/views/user

If you prefer relative keys in slim views use --slim-relative, e.g. t('.title') instead of t('users.index.title'). I prefer absolute keys, as it makes copy pasting/ moving files much safer.

To extract Vue/JS files, we usually put them in a namespace js.* and handle them with i18n-tasks as well, so to extract Vue-Components, or plain JS files:

extract-i18n --locale de --yaml config/locales/unsorted.de.yml -n js app/javascript/components/Foobar.vue

Will prefix the keys with js.components.foobar. This system also switches the interpolation format from %{foo} to {foo}, when handling Vue,JS,TS file.

Bug reports and pull requests are welcome on GitHub at https://github.com/zealot128/extract_i18n.

The gem is available as open source under the terms of the MIT License.