Add typescript support for script files.

[ST-DDT]

Is your feature request related to a problem? Please describe.

All my source is typescript except for the ones for githup-script.

Describe the solution you'd like

Add support for loading typescript files.

Describe alternatives you've considered

Run the typescript compiler to convert the ts file to a js file before executing it with this action.

Additional context

[nomeata]

This would also allow to statically check these scripts before running, e.g. help with rhysd/actionlint#55. This would have prevented plenty of mishaps that I caused…

[Flydiverny]

As a PoC I made a wrapper around github-script to use typescript sources https://github.com/Flydiverny/github-typescript it adds a small overhead as it uses esbuild binary to convert into JS.

[kf6kjg]

Also the tsx project allows for doing some workarounds, and might lead to a solution here:

        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.github_token }}
          script: |
            const { tsImport } = await import('tsx/esm/api');
            const { main } = await tsImport('./report.ts', '${{ github.workspace }}/');
            await main(github, context, '${{ job.status }}');

In this I'm using tsx's programmatic API to load another file that's typescript.

Only caveat is that it can't find tsx in order to import it... So I'm solving that problem...

[cscleison]

Only caveat is that it can't find tsx in order to import it... So I'm solving that problem...

@kf6kjg thanks for you suggestion! I managed to make it work with:

const { tsImport } = await import('${{ github.workspace }}/.github/node_modules/tsx/dist/esm/api/index.cjs');
const { myFn } = await tsImport('./.github/scripts/my-file.ts', '${{ github.workspace }}/');

[kf6kjg]

Just put in #477 with what is unit testing as a functional support for TypeScript!