[GitHub Action] Get gradle package version

For executing pipeline, it is common to get package version. One of the patrice is mark the package version in package info file.

In this example, it will use Gradle as example to show how to get package version and call it in in other steps.

Steps

1. Update GitHub Action.
   Add steps below in GiutHub action.

   - name: Read package version
     id: get-version
     run: |
       version=$(grep -oP "version\s*=\s*'[^']+'" build.gradle | grep -oP "[^']*" | tr -d '\n' | tr -d ' ' | tr -d 'version=')
       echo "::set-output name=version::${version}"
   
   - name: Print package version
     run: |
       echo "Testing current version."
       echo "Package version is ${{ steps.get-version.outputs.version }}"

2. Check result
   Execute the pipeline to check result, expect version in build.gradle mentioned will shown.