semver

semver GitHub Action

This GitHub Action generates a SemVer compliant version for the current commit using a combination of the last tag, the distance from that tag and the name of the branch that the commit is on. The versions are constructed so that the versions for a particular branch will order correctly.

WARNING

This assumes that tags are SemVer compliant of the form {major}.{minor}.{patch}[-{prerelease}], e.g. 0.3.0, 1.2.10, 2.0.0-alpha.1, 2.0.0-beta.3, 2.0.0-rc.2.

The generated versions are of the form:

{tag}[-dev.0][.{branch}.{distance}]

Examples:

• For a tag, the returned version will just be the tag.
• For a branch feature that is 10 commits on from the 1.1.0 tag, the version will be 1.1.1-dev.0.feature.10. Note that the patch version has been incremented as this is considered a pre-release version of the next release.
• For a branch feature2 that is 5 commits on from the 1.2.0-alpha.1 tag, the version will be 1.2.0-alpha.1.feature2.5. Because the tag already has a pre-release version, the "fake" pre-release version dev.0 is not added and the patch version is not incremented.

WARNING

The actions/checkout invocation that precedes the semver action must include fetch-depth: 0 in the inputs (see below for an example).

Without this, the action is unable to determine the distance from the last tag as it only has information about the most recent commit.

See the action.yml for more information.

Usage

The following job uses this action to publish all the Helm charts from a repository to the gh-pages branch using the version and app-version from the semver action:

build_push_chart:
  name: Build and push Helm chart
  runs-on: ubuntu-latest
  steps:
    - name: Check out the repository
      uses: actions/checkout@v3
      with:
        # This is important for the semver action to work correctly
        # when determining the number of commits since the last tag
        fetch-depth: 0

    - name: Get SemVer version for current commit
      id: semver
      uses: azimuth-cloud/github-actions/semver@master

    # Produces something like "1.0.5-dev.0.feature.10  3c7fdeb"
    - run: echo ${{ steps.semver.outputs.version }}  ${{ steps.semver.outputs.short-sha }}