action.yml

name: vars 
description: Outputs variables that can be useful while creating a release
outputs:
  should_release:
    description: Indicates whether a release should be created or not
    value: ${{ steps.vars.outputs.should_release }}
  is_release_type_latest:
    description: Shows if release type is latest (not a v* release) 
    value: ${{ steps.vars.outputs.is_release_type_latest }}
  tag_name:
    description: Name of the tag that should be used for release
    value: ${{ steps.vars.outputs.tag_name }}
  tarball_prefix:
    description: A prefix to use in tarball asset names
    value: ${{ steps.vars.outputs.tarball_prefix }}
runs:
  using: "composite"
  steps:
    - id: vars 
      run: |
        repo_name=${GITHUB_REPOSITORY##*/}
        ref_name=${GITHUB_REF##*/}
        default_branch=$(git remote show origin | awk '/HEAD branch/ {print $NF}')

        should_release=true
        is_release_type_latest=false
        tag_name=""

        if [[ $GITHUB_REF == refs/tags/* ]]
        then
          tag_name=$ref_name
        elif [[ $GITHUB_REF == refs/heads/* && $ref_name == $default_branch ]]
        then
          tag_name=latest
          is_release_type_latest=true
        else
          should_release=false
        fi

        echo "should_release=$should_release" >> $GITHUB_OUTPUT
        echo "is_release_type_latest=$is_release_type_latest" >> $GITHUB_OUTPUT
        echo "tag_name=$tag_name" >> $GITHUB_OUTPUT
        echo "tarball_prefix=$repo_name_$tag_name" >> $GITHUB_OUTPUT
      shell: bash
    - run: |
        echo "- should_release: ${{ steps.vars.outputs.should_release }}"
        echo "- is_release_type_latest: ${{ steps.vars.outputs.is_release_type_latest }}"
        echo "- tag_name: ${{ steps.vars.outputs.tag_name }}"
        echo "- tarball_prefix: ${{ steps.vars.outputs.tarball_prefix }}"
      shell: bash