.github/workflows/branch.yml

# https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#onpushpull_requestbranchestags
name: Branch
on:
  push:
    # Sequence of patterns matched against refs/heads
    branches:    
      # Push events on main branch
      - main
      # Push events on master branch
      - master
      # Push events to branches matching refs/heads/mona/octocat
      - 'mona/octocat'
      # Push events to branches matching refs/heads/releases/10
      - 'releases/**'
      # Push events to branches not matching releases/10-alpha or releases/beta/3-alpha
      - '!releases/**-alpha'
      # Sequence of patterns matched against refs/tags
    tags:        
      - v1             # Push events to v1 tag
      - v1.*           # Push events to v1.0, v1.1, and v1.9 tags

  pull_request:
    # Sequence of patterns matched against refs/heads
    branches-ignore:
      # Do not push events to branches matching refs/heads/mona/octocat
      - 'mona/octocat'
      # Do not push events to branches matching refs/heads/releases/beta/3-alpha
      - 'releases/**-alpha'
    # Sequence of patterns matched against refs/tags
    tags-ignore:
      - v1.*           # Do not push events to tags v1.0, v1.1, and v1.9

jobs:
  branch:
    runs-on: ubuntu-latest
    steps:
      - run: echo ${{ github.ref }}
      - run: echo $GITHUB_REF
      - run: echo "${GITHUB_REF##*/}"
      - run: echo "branch is master"
        if: github.ref == 'refs/heads/master'
      - run: echo "branch is not master"
        if: github.ref != 'refs/heads/master'
      # `github.head_ref` is set when the workflow was triggered by a `pull_request`
      # `github.ref_name` is set when the workflow was not triggered by a `pull_request`
      - run: echo ${{ github.head_ref || github.ref_name }}