Warns merge into master

name: Pull requests can't target master branch

"on":

  pull_request:

    types:

      - opened

      - synchronize

      - reopened

    branches:

      - master

jobs:

  check:

    runs-on: ubuntu-latest

    steps:

      - name: Warning marge into master

        run: |

          echo -e "::warning::This pull request directly merge into \"master\" branch, normally development happens on \"dev\" branch."

          exit 1