debugpy-run 1.0

Finds and runs debugpy for VS Code "remote attach" command line debugging.

DEBUGPY-RUN

This utility facilitates debugging a Python command line program using Python extension in Visual Studio Code.

The Python debugger in VS Code is superb. However debugging a command line program which takes arguments is a little awkward to invoke. The official instructions require you to edit the command line arguments in your launch.json configuration which is cumbersome to do when you want to change arguments for each run, particularly because the arguments have to be quoted within a JSON data structure. This question on stackoverflow describes the problem, but there is no adequate solution. This utility provides a solution, follow the procedure to use it below.

If you have the VS Code Python extension installed then the full debugpy debugger is already bundled with it. You open a terminal window and run this utility to invoke your program with arguments. The utility finds the path where debugpy is installed and then runs it for program and arguments you specify, in listen mode. Connect to it from within VS Code using the Python "Remote Attach" debug configuration (using the default host and port settings). You can just control+c and then re-run the command with changed arguments using your shell history and command line editing facilities, for each debug run.

This utility was developed on Arch Linux but should work on all Linux systems where VS Code is installed with the Python extension. The latest version and documentation is available at https://github.com/bulletmark/debugpy-run.

Installation

Arch users can install debugpy-run from the AUR.

Python 3.6 or later is required. Note debugpy-run is on PyPI so just ensure that python3-pip and python3-wheel are installed then type the following to install (or upgrade):

$ sudo pip3 install -U debugpy-run

Or, to install from this source repository:

$ git clone http://github.com/bulletmark/debugpy-run
$ cd debugpy-run
$ sudo pip3 install .

Procedure to Use

1. Open VS Code for the directory where your command line program is located.

2. Ensure you have added a Debugging Configuration in your launch.json. Specify "Remote Attach" and just accept the default arguments (i.e. host = localhost, port = 5678). You only have to do this once.

3. Open a terminal (either within VS Code, or external) and type:

   debugpy-run my-prog args ..
   

   Debugpy-run will start the debugpy debugger for your program, output a message, and then wait to be connected by VS Code.

4. In VS Code, start debugging, e.g. set a breakpoint then start the Remote Attach debug session.

5. At any point you can control+c the terminal command and restart it with new command line arguments (e.g. using the convenience of your shell history and editing commands) and then restart the debug session in VS Code.

Usage

usage: debugpy-run [-h] [--listen | -C] [-p PORT] [-r]
                   [--log-to PATH | --log-to-stderr] [-m MODULE] [-c CODE]
                   [--pid PID] [-V]
                   [program] ...

Finds the "debugpy" program within your VSCode Python extension and then runs
it for "remote attach" debugging of the program/module you specify.

positional arguments:
  program               python program to execute and debug
  args                  remaining arguments to debug

optional arguments:
  -h, --help            show this help message and exit
  --listen              listen on given port, default=True
  -C, --connect         connect to given port rather than listen
  -p PORT, --port PORT  [host:]port to use, default=5678
  -r, --run-on-error    re-run program/module even on error
  --log-to PATH         log to given path
  --log-to-stderr       log to stderr
  -m MODULE, --module MODULE
                        python module to execute and debug
  -c CODE, --code CODE  python code to execute and debug
  --pid PID             python pid to attach and debug
  -V, --version         output debugpy path and version

License

Copyright (C) 2021 Mark Blakeney. This program is distributed under the terms of the GNU General Public License. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License at http://www.gnu.org/licenses/ for more details.