Invalid tag/reference format with ghcr.io

[rhblind]

Found a bug? Maybe our Slack Community can help.

Describe the Bug

Hello,
I'm trying to set up a Github Workflow that uses this action to create and publish a docker image to ghcr.io.
I'm getting an error on the Builder info step

Error: buildx failed with: ERROR: invalid tag "ghcr.io//:sha-8cc8e90c5ebb6ff27df767484b7f95f9d70f3faa": invalid reference format

Expected Behavior

I expect the default tags to work.

Steps to Reproduce

Whenever a workflow action runs, see below.

Screenshots

See below

Environment (please complete the following information):

My (simplified) workflow config

name: Release
on:
  push:
    branches:
      - main
  release:
    type: [published]
permissions:
  contents: read
  packages: write
jobs:
  build-and-push-image:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Build and push
        uses: cloudposse/github-action-docker-build-push@v1.17.2
        with:
          registry: ghcr.io
          login: ${{ github.actor }}
          password: ${{ secrets.github_token }}
          organization: ${{ github.repository.owner.login }}
          repository: ${{ github.repository.name }}

Additional Context

Error output

/usr/bin/docker buildx build --cache-from type=gha --cache-to type=gha,mode=max --file .//Dockerfile --iidfile /home/runner/work/_temp/docker-actions-toolkit-SPmw6I/build-iidfile-1c3c362c17.txt --label org.opencontainers.image.created=2025-01-14T13:35:44.838Z --label org.opencontainers.image.description=Project description --label org.opencontainers.image.licenses= --label org.opencontainers.image.revision=8baa8e2249f3a8b6e427ef8eecd0847f660d4099 --label org.opencontainers.image.source=https://github.com// --label org.opencontainers.image.title=my-project --label org.opencontainers.image.url=https://github.com/my-org/my-project --label org.opencontainers.image.version=sha-8baa8e2249f3a8b6e427ef8eecd0847f660d4099 --platform linux/amd64 --attest type=provenance,mode=min,inline-only=true,builder-id=https://github.com/my-org/my-project/actions/runs/12768807147 --tag ghcr.io//:sha-8baa8e2249f3a8b6e427ef8eecd0847f660d4099 --tag ghcr.io//:main --tag ghcr.io//:latest --tag ghcr.io//:sha-8baa8e2 --metadata-file /home/runner/work/_temp/docker-actions-toolkit-SPmw6I/build-metadata-e623a3464d.json --pull --push ./
ERROR: invalid tag "ghcr.io//:sha-8baa8e2249f3a8b6e427ef8eecd0847f660d4099": invalid reference format
Error: buildx failed with: ERROR: invalid tag "ghcr.io//:sha-8baa8e2249f3a8b6e427ef8eecd0847f660d4099": invalid reference format

[johncblandii]

@rhblind this looks like the inputs are not providing any values. Did you resolve this?

If not, can you check the GHA output to see what input values were provided?