How to integrate VSCode debugger for Python Bazel projects without altering source code? - Stack Overflow

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I have a monorepo project built with Bazel and I'm trying to integrate VSCode debuggers directly with Python targets I'm running.

There is a similar question that helps solve the problem here: How to use the vscode python debugger with a project built with bazel?

But I would like to do this without altering the source code and just putting a breakpoint in the code using the Python debugpy module.

I tried the following command and it waits for me to attach a debugger (using the launch.json configuration below), but then it proceeds with the

bazel run --run_under="debugpy --listen 0.0.0.0:5678 --wait-for-client" //path/to/target/tests:dummy_tests

Here is my launch.json to attach to the debugpy server.

{
  "configurations": [
    {
      "type": "debugpy",
      "request": "attach",
      "name": "Attach to a running debugpy",
      "debugServer": 5678
    }
  ]
}

I was expecting that the breakpoint was hit, but it just continued through the test.

If I add the code snippet from the linked question above, and run without the --run_under command, everything looks fine and the breakpoint is hit.

import debugpy
debugpy.listen(5678)
debugpy.wait_for_client()

bazel run //path/to/target/tests:dummy_tests

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