VS Code：如何在launch.json中通过shell命令获取进程ID？

Question

In our Visual Studio Code configuraiton launch.json looks like this:

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "fb-python",
            "request": "attach",
            "name": "Attach to a running Python process",
            "processId": "${command:pickProcess}",
            "subProcess": true,
            "justMyCode": true,
            "redirectOutput": true,
            "django": true,
            "client": "instagram"
        }
    ]
}

It shows process selection dialog every time I click "Debug". What I want to do is to calculate the process ID using a shell command:

ps -ef | grep "async uWSGI worker 1" | grep -v grep | awk '{print $2}'

How can I do that without writing a custom extension?

Answer 1

You can use the extension Command Variable .

It can read the content of a file and use it as variable in the launch.json

Define a pre-lauch task in the launch configuration.

In task.json define a task that writes the PID to a file and name the task writePID

ps -ef | grep "async uWSGI worker 1" | grep -v grep | awk '{print $2}' > /tmp/PID_py.txt

Change lauch.json to

{
  "version": "0.2.0",
  "configurations": [
      {
          "type": "fb-python",
          "request": "attach",
          "name": "Attach to a running Python process",
          "processId": "${input:readPID}",
           "preLaunchTask": "writePID",
           "subProcess": true,
           "justMyCode": true,
           "redirectOutput": true,
           "django": true,
           "client": "instagram"
      }
  ],
  "inputs": [
    {
      "id": "readPID",
      "type": "command",
      "command": "extension.commandvariable.file.content",
      "args": {
        "fileName": "/tmp/PID_py.txt"
      }
    }
  ]
}