github-tag-action

A Github Action to automatically bump and tag master, on merge, with the latest SemVer formatted version.

Medium Post: Creating A Github Action to Tag Commits

Usage

name: Bump version
on:
  push:
    branches:
      - main
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: '0'
    - name: Bump version and push tag
      uses: cmnhospitals/[email protected]
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

NOTE: set the fetch-depth for actions/checkout@v3 to be sure you retrieve all commits to look for the semver commit message.

Options

Environment Variables

• GITHUB_TOKEN (required) - Required for permission to tag the repo.
• DEFAULT_BUMP (optional) - Which type of bump to use when none explicitly provided (default: minor).
• PREFIX (optional) - Adds a prefix before version number (default: no prefix). Use v for traditional semantic versioning.
• RELEASE_BRANCHES (optional) - Comma separated list of branches (bash reg exp accepted) that will generate the release tags. Other branches and pull-requests generate versions postfixed with the commit hash and do not generate any tag. Examples: master or .* or release.*,hotfix.*,master ...
• CUSTOM_TAG (optional) - Set a custom tag, useful when generating tag based on f.ex FROM image in a docker image. Setting this tag will skip all version calculation logic and use the custom tag directly for optimal performance!
• SOURCE (optional) - Operate on a relative path under $GITHUB_WORKSPACE.
• DRY_RUN (optional) - Determine the next version without tagging the branch. The workflow can use the outputs new_tag and tag in subsequent steps. Possible values are true and false (default).
• INITIAL_VERSION (optional) - Set initial version before bump. Default 0.0.0.
• CUSTOM_VERSION (optional) - Set custom major.minor version before bump. This setting will allow us to pass in a major.minor version (e.g., 2.3) and then add the patch number dynamically based on tags that already exist in your chosen context. Using this setting will force DEFAULT_BUMP to 'patch' regardless of what is passed in
• TAG_CONTEXT (optional) - Set the context of the previous tag. Possible values are repo (default) or branch.
• PRERELEASE_SUFFIX (optional) - Suffix for your prerelease versions, beta by default. Note this will only be used if a prerelease branch.
• VERBOSE (optional) - Print git logs. For some projects these logs may be very large. Possible values are true (default) and false.

Outputs

• new_tag - The value of the newly created tag.
• new_version - The value of the newly created tag without the prefix.
• tag - The value of the tag before running this action.
• version - The value of the tag before running this action without the prefix.
• part - The part of version which was bumped.

Note: This action creates a lightweight tag.

Bumping

Manual Bumping: Any commit message that includes #major, #minor, #patch, or #none will trigger the respective version bump. If two or more are present, the highest-ranking one will take precedence. If #none is contained in the commit message, it will skip bumping regardless DEFAULT_BUMP.

Automatic Bumping: If no #major, #minor or #patch tag is contained in the commit messages, it will bump whichever DEFAULT_BUMP is set to (which is minor by default). Disable this by setting DEFAULT_BUMP to none.

Note: This action will not bump the tag if the HEAD commit has already been tagged.

Workflow

• Add this action to your repo
• Commit some changes
• Either push to master or open a PR
• On push (or merge), the action will:
  • Get latest tag
  • Bump tag with minor version unless any commit message contains #major or #patch
  • Pushes tag to github
  • If triggered on your repo's default branch (master or main if unchanged), the bump version will be a release tag.
  • If triggered on any other branch, a prerelease will be generated, depending on the bump, starting with *-<PRERELEASE_SUFFIX>.1, *-<PRERELEASE_SUFFIX>.2, ...

Credits

fsaintjacques/semver-tool

anothrNick/github-tag-action