TypeScript detection not working properly in node.js scripts

[eugene-matvejev]

Describe the bug

Hello,

I mentor a person who work on side project
https://github.com/search?q=repo%3Aanna-liepina%2Fexplore-sa-node++language%3AJavaScript&type=code
but for some reason a lot of typescript files are not recognized as typescript

Expected behaviour

files should be recognized because files are 100% typescript

Related discussion

n/a

Additional notes

demo link:
https://github.com/search?q=repo%3Aanna-liepina%2Fexplore-sa-node++language%3AJavaScript&type=code

[Alhadis]

The files are getting classified as Node.js programs because of the #!/usr/bin/env node hashbang. Linguist doesn't consider Node to be a TypeScript interpreter (nor should it), so I recommend using an override or a Vim/Emacs-style modeline:

Using an override:

# Add the following to your project's `.gitattributes` file
*.ts linguist-language=TypeScript

Using modelines:

#!/usr/bin/env node
// -*- mode: typescript; -*-

declare type Script = "to be this file's language";