Upload a github action artifact to LATEST release

Question

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-

https://uploads.github.com/repos/atiqg/test/releases/28579698/assets{?name,label}

Then I changed it to direct to latest release-

https://uploads.github.com/repos/atiqg/test/releases/latest/assets

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...

Answer 1

If latest doesn't work, you can use GitHub API to get upload_url...

https://api.github.com/repos/actions/checkout/releases/latest

...and then pass it to upload-release-asset.

In workflow it would look something like this

- run:   |
         upload_url=$(curl -sL https://api.github.com/repos/actions/checkout/releases/latest | jq -r '.upload_url')
         echo UPLOAD_URL=$upload_url >> $GITHUB_ENV
  shell: bash

- uses: actions/upload-release-asset@v1
  with:
   upload_url: ${{ env.UPLOAD_URL }}