build docker images on PR

[kradalby]

Take 2, not from fork, supersedes #2053

Sometimes we want people to test features in PRs and
not everyone is used to using git, build go and docker.

This commit builds docker containers and pushes them to
GHCR (not dockerhub) for testing on pushes to branches
that has open pull requests to main using Ko.
This is configured to mimic the debug images produced
by goreleaser.

[kradalby]

Looks like this isnt possible,

pull_request does not have secrets access, so cannot push.

pull_request_target has secret access, but runs on the base branch, not the new commits, so the changes would not be reflected.

[chriswiggins]

@kradalby this should work, You need to make sure that the permissions are set for the GITHUB_TOKEN so that it is allowed to write to the package registry:

permissions:
  pull-requests: write
  packages: write

You also need to authenticate to the registry first:

        name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

[masterwishx]

Collaborator

last beta4 builded ...beta.4 instead of ...beta4

[kradalby]

@masterwishx this is in response to #1923

[kradalby]

@chriswiggins, I think I could not get it to work for PRs at all? and from what I read in the gh docs secrets are not available, but I might have the motivation to fight and try this again at another time...

[masterwishx]

@masterwishx this is in response to #1923

got it, but now have next , not that a big problem :

[kradalby]

@masterwishx oh dear, I'll post it to the #1923 issue.