Build tag action

Simple Action to generate a "build tag" based on workflow variables. For use in tags, Docker images, etc.

The Action uses workflow variables from the context and runs them through a tag generation routine based on a template, yielding a build tag as a result.

Inputs

template

Required: yes

The tag template. Elements are enclosed in curly brackets { }. Valid elements are:

• runId: From GITHUB_RUN_ID
• runNumber: From GITHUB_RUN_NUMBER
• sha: From GITHUB_SHA
• shortSha: From GITHUB_SHA, but truncated to shortShaLength
• time: Current time. The format used can be specified with the input timeFormat.
• refName: From GITHUB_REF_NAME

For more information around the values, see docs

Valid example format: {time}-{runId}-{sha}

timeFormat

Required: no. Default: YYYYMMDDHHmm

Time format specifier follows that of moment.js

shortShaLength

Required: no. Default: 7

When using shortSha, sets the number of characters of the full SHA to use.

Outputs

tag

The resulting generated tag, ready for use.

Example usage

name: example
on: [push]
jobs:
  generate_tag:
    runs-on: ubuntu-latest
    steps:
    - name: Generate build tag
      id: build_tag
      uses: erikns/buildtag-action@v1
      with:
        template: "{time}-{runId}-{shortSha}"
        timeFormat: "YYYY-MM-DD-HHmm"
        shortShaLength: 8
    - name: Use build tag
      run: echo ${{ steps.build_tag.outputs.tag }}

TODO

• Add unit tests

License

Simple, permissive MIT License.