edit-environment-variable-value.yml

name: Edit environment variable value
on:
  push:
    branches:
      - main

env:
  RELEASE_NUMBER: 4.14.1|09.06.2021

jobs:
  build:
    runs-on: ubuntu-latest

    # job level default
    # https://www.dotnetthailand.com/programming-cookbook/github-actions/github-actions-fundamentals#changeadefaultshell
    defaults:
      run:
        shell: bash # It is default shell for non-Windows platform but just show how to set a default shell at job level.

    steps:
      - name: Change environment variable's value
        # https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_environment_variables?view=powershell-7.1
        shell: pwsh # Running a script/command in this step with PowerShell Core
        run: |
          $releaseNumber = $env:RELEASE_NUMBER.SubString(0, $env:RELEASE_NUMBER.IndexOf('|'))

          # For PowerShell, we need to use an environment file. https://github.community/t/empty-github-env-variables-on-powershell/147626/2
          "RELEASE_NUMBER=$releaseNumber" | Out-File -FilePath $Env:GITHUB_ENV -Encoding utf8 -Append         

      - name: Output environment variable's value in multiple ways
        # This step runs script/command with Bash
        run: |
          echo "RELEASE_NUMBER = $RELEASE_NUMBER"
          echo "RELEASE_NUMBER = ${{ env.RELEASE_NUMBER }}"