Is there a variable for branch?

[ekristen]

Is there a way to do the branch name dynamically as the prefix?

type=sha,prefix=${{ branch_name}}-,suffix=,enable=true

Something like that ^

[crazy-max]

@ekristen

Is there a way to do the branch name dynamically as the prefix?

Not currently but we could support a global Handlebars template on prefix,suffix,value attributes. In the meantime you can do this:

steps:
  -
    name: Prepare
    id: prep
    run: |
      echo ::set-output name=branch::$(echo ${GITHUB_REF#refs/heads/} | sed -r 's#/+#-#g')
  -
    name: Docker meta
    id: meta
    uses: crazy-max/ghaction-docker-meta@v2
    with:
      images: name/app
      tags: |
        type=sha,prefix=${{ steps.prep.outputs.branch }}-,suffix=,enable=true

[monkbroc]

I was looking for ${branch}-${sha} as the tag name and instead of settting the branch name as a prefix I ended up setting the SHA as a suffix so the rest of the type=ref,event=branch logic will apply.

      - name: Set short SHA
        id: vars
        run: echo "::set-output name=sha_short::$(git rev-parse --short HEAD)"
      -
        name: Docker meta
        id: meta
        uses: crazy-max/ghaction-docker-meta@v2
        with:
          images: |
            name/app
          tags: |
            type=ref,event=branch,suffix=-${{ steps.vars.outputs.sha_short }}

[crazy-max]

@ekristen @monkbroc #71 should fix this issue. Can you test with crazy-max/ghaction-docker-meta@global-exp and let me know please? Documentation about global expressions is available here: https://github.com/crazy-max/ghaction-docker-meta/tree/global-exp#global-expressions

[monkbroc]

Thanks! Yes, I confirm that #71 fixes this issue by using

          tags: |
            type=sha,prefix={{branch}}-