Github Actions部署Azure函数应用时依赖安装失败求助

尝试通过UI将GitHub仓库关联到Azure函数应用，构建依赖环节报错，错误日志如下：

Run pip install -r requirements.txt
pip install -r requirements.txt
shell: /usr/bin/bash -e {0}
env:
AZURE_FUNCTIONAPP_PACKAGE_PATH: .
PYTHON_VERSION: 3.10
pythonLocation: /opt/hostedtoolcache/Python/3.10.11/x64
ERROR: Could not open requirements file: [Errno 2] No such file or directory: 'requirements.txt'

Notice: A new release of pip is available: 23.0.1 -> 23.1.2
Notice: To update, run: pip install --upgrade pip
Error: Process completed with exit code 1.

本人对CI/CD这类部署方式完全陌生，使用Windows系统，Python版本为3.10.6，附上GitHub Actions工作流文件：

# Docs for the Azure Web Apps Deploy action: https://github.com/azure/functions-action
# More GitHub Actions for Azure: https://github.com/Azure/actions
# More info on Python, GitHub Actions, and Azure Functions: https://aka.ms/python-webapps-actions

name: Build and deploy Python project to Azure Function App - AutoAnalytics

on:
  push:
    branches:
      - main
  workflow_dispatch:

env:
  AZURE_FUNCTIONAPP_PACKAGE_PATH: '.' # set this to the path to your web app project, defaults to the repository root
  PYTHON_VERSION: '3.10' # set this to the python version to use (supports 3.6, 3.7, 3.8)

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Setup Python version
        uses: actions/setup-python@v1
        with:
          python-version: ${{ env.PYTHON_VERSION }}

      - name: Create and start virtual environment
        run: |
          python -m venv venv
          source venv/bin/activate

      - name: Install dependencies
        run: pip install -r requirements.txt
        
      # Optional: Add step to run tests here

      - name: Upload artifact for deployment job
        uses: actions/upload-artifact@v2
        with:
          name: python-app
          path: |
            . 
            !venv/

  deploy:
    runs-on: ubuntu-latest
    needs: build
    environment:
      name: 'Production'
      url: ${{ steps.deploy-to-function.outputs.webapp-url }}

    steps:
      - name: Download artifact from build job
        uses: actions/download-artifact@v2
        with:
          name: python-app
          path: .

      - name: 'Deploy to Azure Functions'
        uses: Azure/functions-action@v1
        id: deploy-to-function
        with:
          app-name: 'APP_NAME'
          slot-name: 'Production'
          package: ${{ env.AZURE_FUNCTIONAPP_PACKAGE_PATH }}
          publish-profile: ${{ secrets.AZUREAPPSERVICE_PUBLISHPROFILE_PROFILE_PATH }}
          scm-do-build-during-deployment: true
          enable-oryx-build: true

1. 生成并提交requirements.txt文件 #

GitHub Actions构建时会在仓库根目录查找requirements.txt，缺失这个文件是报错的核心原因。操作步骤：

• 本地打开项目根目录的命令提示符或PowerShell
• 运行命令生成依赖清单：

  pip freeze > requirements.txt
  

• 将生成的requirements.txt文件提交并推送到GitHub的main分支

2. 核对文件路径配置 #

如果你的函数代码不在仓库根目录，需要调整工作流中的路径配置：

• 修改环境变量AZURE_FUNCTIONAPP_PACKAGE_PATH为代码所在子目录，比如代码在src文件夹下：

  env:
    AZURE_FUNCTIONAPP_PACKAGE_PATH: './src'
  

• 同步修改依赖安装步骤的路径：

  - name: Install dependencies
    run: pip install -r ${{ env.AZURE_FUNCTIONAPP_PACKAGE_PATH }}/requirements.txt
  

3. 避免重复构建冲突 #

工作流中同时启用了scm-do-build-during-deployment和enable-oryx-build，会导致Azure端再次触发构建，可能引发路径问题。建议关闭这两个参数，使用GitHub Actions构建好的产物直接部署：

- name: 'Deploy to Azure Functions'
  uses: Azure/functions-action@v1
  id: deploy-to-function
  with:
    app-name: 'APP_NAME'
    slot-name: 'Production'
    package: ${{ env.AZURE_FUNCTIONAPP_PACKAGE_PATH }}
    publish-profile: ${{ secrets.AZUREAPPSERVICE_PUBLISHPROFILE_PROFILE_PATH }}
    scm-do-build-during-deployment: false
    enable-oryx-build: false

4. 优化虚拟环境操作（可选） #

Ubuntu runner上的虚拟环境激活命令需要和依赖安装放在同一个步骤中，避免环境失效：

- name: Create virtual environment and install dependencies
  run: |
    python -m venv venv
    source venv/bin/activate
    pip install -r requirements.txt

内容的提问来源于stack exchange，提问作者Mitchell.Laferla