Upload a github action artifact to LATEST release

I want to upload a artifact to latest release… without creating a new release.

I started with github official action upload-release-asset to upload artifact.
It requires a upload_url as an input which tells it the url of release.
Which is generally taken from creating a release in previous step with create-release action.

I tried to print output url from create_release-


Then I changed it to direct to latest release-


Which oblivously did not work out and thrown this error-

##[error]Multipart form data required

Is there any way I can do this? I don’t want to create a new release from actions.
I want to create release normally then action should upload artifact to latest release…

Hi @AtiqGauri,
You could call this api to get the latest release. There is an action send arbitrary requests to GitHub’s REST API called octokit/request-action. And then you can get the upload_url of it from the response json body. You could set the upload_url to an output variable which could be used in upload-release-asset step.
Please see my example:

    runs-on: ubuntu-latest
    - uses: actions/checkout@v2
    - name: Build project # This would actually build your project, using zip for an example artifact
      run: |
          zip --junk-paths my-artifact README.md
    - uses: octokit/request-action@v2.x
      id: get_latest_release
          route: GET /repos/:repository/releases/latest
          repository: ${{ github.repository }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    - name: get upload url
      id: get_upload_url
      run: |
        url=$(echo "$response" | jq -r '.upload_url')
        echo "::set-output name=url::$url"
          response:  ${{ steps.get_latest_release.outputs.data }}
    - name: Upload a Release Asset
      uses: actions/upload-release-asset@v1.0.2
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        # The URL for uploading assets to the release
        upload_url:  ${{steps.get_upload_url.outputs.url}}
        # The path to the asset you want to upload
        asset_path: ./my-artifact.zip
        # The name of the asset you want to upload
        asset_name: my-artifact.zip
        # The content-type of the asset you want to upload. See the supported Media Types here: https://www.iana.org/assignments/media-types/media-types.xhtml for more information
        asset_content_type: application/zip
1 Like

That was really helpfull…

Can you tell me how we can use this action to update/overwrite existing asset of latest release (endpoint: update, delete )

You need follow next steps :

  1. Call latest release API
  2. Add a run step to get the release id from the outputs data of step1 , set it to output variable.
  3. Call list release assets api .
  4. Get the asset id which you want to update or delete using bash script , set asset id to output variable
  5. Use the (endpoint: update, delete ) you mentioned before to update/overwrite existing asset of latest release.

octokit/request-action is for you to send request to API endpoint. You could refer to the examples in its README.md file.