core: Create getInputList utility

[kiprasmel]

Inspired by https://github.com/actions/cache/blob/master/src/restore.ts#L30-L33

Would fix #184,

but there's another issue - actions/cache#44:
an input list should use arrays instead of strings,
separated by newlines (\n).

[bryanmacfarlane]

yeah, I think the real list type would be cooperative with the yaml, the service and come down in the job message to the runner as a line delimited or array of strings.

Thanks so much for the PR but I'm not sure it's the right path. I'll leave open and check with folks.

[kiprasmel]

@bryanmacfarlane I agree - let's not rush this.

[KaelWD]

This would be useful for me, I'm trying to upload ignored files as artefacts but actions/upload-artifact doesn't support a newline-delimited string:

- run: echo ::set-env name=GITHUB_ARTIFACTS_LOCATIONS::$(git status --ignored --porcelain | grep -oP '(?!.*node_modules\/.*)\!\! \K.*')
- uses: actions/upload-artifact@v2
  with:
    path: ${{ env.GITHUB_ARTIFACTS_LOCATIONS }}

##[warning]No files were found for the provided path: packages/vuetify/es5/ packages/vuetify/lib-temp/ packages/vuetify/lib/. No artifacts will be uploaded.

[mmagician]

Any updates on this feature?

[thboop]

Hey @kiprasmel , thanks for the contribution, I've made some minor updates and created: https://github.com/actions/toolkit/pull/829/files

Going to merge that pr and release a new version this week. Going to close this out in favor of that.

[kiprasmel]

Hey @thboop, that's great - thanks!