运行dev_appserver.py时如何配置应用名称？

Great question! Now that Google recommends ditching the application element in app.yaml and using command-line flags for production deployment, here's how to handle specifying your app/project ID for the local dev_appserver.py tool:

• Use command-line flags directly
  Just like with deployment tools, you can pass the app ID via the --application (or shorthand -A) flag when starting the local server:

  dev_appserver.py --application [YOUR_PROJECT_ID] app.yaml
  # Or the shorter version:
  dev_appserver.py -A [YOUR_PROJECT_ID] app.yaml
  

  This is the most explicit approach and aligns with the command-line pattern recommended for production deployments.

• Set an environment variable
  If you don't want to type the flag every time, set the GCLOUD_PROJECT environment variable—dev_appserver.py will automatically pick up this value:

  • On Linux/macOS:

    export GCLOUD_PROJECT=[YOUR_PROJECT_ID]
    dev_appserver.py app.yaml
    

  • On Windows (Command Prompt):

    set GCLOUD_PROJECT=[YOUR_PROJECT_ID]
    dev_appserver.py app.yaml
    

  • On Windows (PowerShell):

    $env:GCLOUD_PROJECT = "[YOUR_PROJECT_ID]"
    dev_appserver.py app.yaml
    

• A quick note on legacy configs
  If you haven't fully removed the application element from app.yaml yet, dev_appserver.py will prioritize the command-line flag or environment variable over the config file value. For consistency with production best practices, though, it's still recommended to remove the application entry entirely.

内容的提问来源于stack exchange，提问作者jacob