using-artifacts.yml

name: Managing workflow artifacts

on: workflow_dispatch

jobs:
  job-1:
    name: Uploads an artifact
    runs-on: ubuntu-latest
    steps:
      - shell: bash
        run: |
          echo "hello from job 1" > greetings.txt
      - name: Upload greeting file from job 1
        uses: actions/upload-artifact@v2
        with:
          name: my-files
          path: greetings.txt

  job-2:
    name: Changes and Saves the previous artifact
    runs-on: macos-latest
    needs: [job-1]
    steps:
      - name: Download greetings.txt from job 1
        uses: actions/download-artifact@v2
        with:
          name: my-files
      - shell: bash
        run: |
          echo "a change has been made by job 2" >> greetings.txt
      - name: Upload math result for job 2
        uses: actions/upload-artifact@v2
        with:
          name: my-files
          path: greetings.txt

  job-3:
    name: Uses the final version of the artifact
    runs-on: windows-latest
    needs: [job-2]
    steps:
      - name: Download new greetings file from job 2
        uses: actions/download-artifact@v2
        with:
          name: my-files
      - name: Print the final result
        shell: bash
        run: |
          value=`cat greetings.txt`
          echo The resultng file is $value