Add language Just / Justfile

[mihaigalos]

Description

This PR adds language support for just.

Checklist:

• I am adding a new language.
  • The extension of the new language is used in hundreds of repositories on GitHub.com.
    • Search results for each extension:
      • https://github.com/search?utf8=%E2%9C%93&type=Code&ref=searchresults&q=extension%3AFOOBAR+KEYWORDS+NOT+nothack
  • I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • https://github.com/casey/just/blob/master/examples/screenshot.just
    • Sample license(s): CC0-1.0 license
  • I have included a syntax highlighting grammar: https://github.com/skellock/vscode-just.
  • I have updated the heuristics to distinguish my language from others using the same extension.

[casey]

I'm the maintainer of just, and just wanted to note that this looks good to me. Let me know if I can be of assistance!

[lildude]

See inline comments.

We also need the cached license file from the grammar which should have been downloaded when you ran script/add-grammar. If you can't find it or it wasn't for some reason, you can get it again by running: bundle exec licensed cache -c vendor/licenses/config.yml.

[lildude]

Please rename the samples/Justfile/ directory which contains your sample to samples/just/

You'll also need to run list-grammars again and correct the ordering to resolve the last of the test failures.

[mihaigalos]

Hey @lildude, thank you for your support in getting this PR merged. 👍
Is the syntax coloring taking effect immediately or does GH need to reindex something?

Up: I reread the CONTRIBUTING.md, I guess that answers it! 😅:

New languages will not appear in GitHub's search results for some time after the pull request has been merged and the new Linguist release deployed to GitHub.com.