Support actions/upload-artifact@v4, actions/download-artifact@v4

[lunny]

Feature Description

The v4 has a different protocol than before.

Screenshots

No response

[ChristopherHX]

Could be helpful: nektos/act#2135

I have had already reverse engineered this to run locally.

Currently we would also have to patch away the GHES not supported flag in the client code to actually test it via gitea.

[ChristopherHX]

Does Gitea Allow JWT Auth already? I'm not that familar with Gitea's Server Code.

The old artifacts v3 backend uses some sort of PAT token.

GitHub reads the scp claim of the ACTIONS_RUNTIME_TOKEN as jwt or throws

[ChristopherHX]

I'm trying to transist the ACTIONS_RUNTIME_TOKEN to jwt in #28885 using a backward compatible way. Requires runner changes.

In case you wonder why this is needed here the error message

| Artifact name is valid!
| Root directory input is valid!
[e.yml/_0]   ❗  ::error::Failed to get backend IDs: The provided JWT token is invalid and/or missing claims
[e.yml/_0]   ❌  Failure - Main actions/upload-artifact@v4

After this change to both runner and server, we get

[e.yml/_0]   💬  ::debug::Workflow Run Backend ID: 17
[e.yml/_0]   💬  ::debug::Workflow Job Run Backend ID: 45
[e.yml/_0]   ❗  ::error::Unable to get the ACTIONS_RESULTS_URL env variable

assigning ACTIONS_RESULTS_URL and implementing the backend in gitea is an open task. I did this in my runner.server project in December and it is possible to do.

[ChristopherHX]

Uploading POC works for me locally using further Gitea changes

on:
  push:
jobs:
  _0:
    runs-on: self-hosted
    steps:
    - run: env
    - run: |
        github:
        ${{ tojson(github) }}
        inputs:
        ${{ tojson(inputs) }}
        matrix:
        ${{ tojson(matrix) }}
        needs:
        ${{ tojson(needs) }}
        strategy:
        ${{ tojson(strategy) }}                
      shell: cp {0} context.txt
    - uses: christopherhx/gitea-upload-artifact@v4
      with:
        name: test
        path: context.txt

ChristopherHX/gitea@jwt-based-actions-runtime-token...ChristopherHX:gitea:gitea-artifacts-v4

Until finished, I'm not yet open a PR. Just for your information of the current state.

act_runner also need to set ACTIONS_RESULTS_URL to gitea.server_url.
Gitea Hosted with subpath in server_url are not supported

christopherhx/gitea-upload-artifact@v4 and christopherhx/gitea-download-artifact@v4 are removing the GHES error message until GitHub removes the not supported fatal error themself.

I don't like how GitHub blocks GHES using hardcoded asserts, until they support them officially

Download artifact now working as well.......