Trying to run pytest using Austin in VS code.

[hrshdhgd]

This may be similar to #21 but I'm not sure. I read the documentation at the VS code marketplace here

Here's my situation:
I have python project that I'm trying to profile using Austin within VS code. I'm using a MacBook (macOS Big Sur). Here's my tasks.json

{
    "version": "2.0.0",
    "tasks": [
        {
            "type": "austin",
            "label": "Profile tests",
            "args": [
                "python",
                "-m",
                "pytest",
            ],
            "problemMatcher": []
        }
    ]
}

I'm just trying to run pytest over the project. I'm also running this within a conda virtual environment. I get the following error:

> Executing task: Profile tests <

Starting Profiler in xxx/yyy/zzz/project-name.
Running 'austin' with args '-i 100 --pipe  python -m pytest'.
austin process exited with code 127
The terminal process failed to launch (exit code: 127).

Terminal will be reused by tasks, press any key to close it.

Any guidance/suggestion would be great appreciated.

[P403n1x87]

I think this might be due to the fact that austin is running without sudo. On MacOS the use of sudo is unfortunately mandatory (unless you have SIP disabled). One possible solution is to allow austin to run without password, by adding a rule in the sudoers file, and then actually running sudo, e.g.

        {
            "type": "austin",
            "label": "Profile tests",
            "command": ["sudo"],
            "args": [
                "python",
                "-m",
                "pytest",
            ]
        },

[hrshdhgd]

Hey @P403n1x87 , thank you so much for the suggestion. I sudo vi sudo and added the line:

myUsername ALL=(ALL) NOPASSWD: ALL

and ran the task again after changing the task to what you suggested above. I get a different error (exit code 1) instead of the previous exit code 127..

Running 'sudo' with args 'austin -i 100 --pipe  python -m pytest'.
austin process exited with code 1
The terminal process failed to launch (exit code: 1).

Terminal will be reused by tasks, press any key to close it.

[P403n1x87]

@hrshdhgd thanks for trying that. I think this is now the same as #23, which I haven't been able to figure out yet 🙁 .

[P403n1x87]

I sudo vi sudo and added the line:

myUsername ALL=(ALL) NOPASSWD: ALL

Just as an aside, I'd use something like

myUsername ALL = (root) NOPASSWD: /usr/local/bin/austin

instead.

[hrshdhgd]

Not a problem , please let me know when you figure it out. In the meanwhile, would you know which Austin VSCode extension version and Austin version combination has proven to work in unison in the past?

[hrshdhgd]

I sudo vi sudo and added the line:
myUsername ALL=(ALL) NOPASSWD: ALL

Just as an aside, I'd use something like

myUsername ALL = (root) NOPASSWD: /usr/local/bin/austin

instead.

Aah ... I'll try that.

[hrshdhgd]

same error.

[P403n1x87]

Not a problem , please let me know when you figure it out. In the meanwhile, would you know which Austin VSCode extension version and Austin version combination has proven to work in unison in the past?

I'm afraid Austin latest and Austin VS Code latest have the best chances 🙁 . What I would recommend in the meantime is to invoke austin manually from the command line and open the collected samples with the extension afterwards. I think I can safely say this proves to be the most reliable way of using the extension when everything else fails.

[hrshdhgd]

Could you direct me to an example please?

[P403n1x87]

Could you direct me to an example please?

You can run the same command that VS Code is trying to run from a terminal, e.g.

sudo austin -i 100 -o /path/to/austin/output.austin python -m pytest

and then open the /path/to/austin/output.austin from VS Code by clicking the OPEN button in the Flame Graph panel (or using the Cmd + Shift + A shortcut). This is equivalent to running the task.

[hrshdhgd]

Thank you so much @P403n1x87 ! That works as expected!