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我想在我的 Github 操作工作流中的作业之间定义和设置环境变量。下面的工作流程是我尝试过的，但不幸的是环境变量GIT_PR_SHA_SHORT和E2E_GIT_PR_SHA不起作用。

是否可以？

name: Git Pull Request Workflow

on:
  workflow_dispatch:
  pull_request:
    branches:
      - master

env:
  GIT_PR_SHA: ${{github.event.pull_request.head.sha}}
  GIT_PR_SHA_SHORT: "${{ env.GIT_PR_SHA:0:10 }}"
  ENV_NAME: test
  E2E_GIT_PR_SHA: "${{ env.ENV_NAME }}-${{ env.GIT_PR_SHA_SHORT }}"

jobs:
  first-job:
    name: Build Docker Image
    runs-on: ubuntu-latest

    steps:
    - name: First Echo Step
      run: |
            echo "GIT_PR_SHA_SHORT = ${GIT_PR_SHA_SHORT}"
            echo "E2E_GIT_PR_SHA = ${E2E_GIT_PR_SHA}"

  second-job:
    name: Build Docker Image
    runs-on: ubuntu-latest

    steps:
    - name: Second Echo Step
      run: |
            echo "GIT_PR_SHA_SHORT = ${GIT_PR_SHA_SHORT}"
            echo "E2E_GIT_PR_SHA = …