How to set environment variables in vscode for debugging? - debugging

Question

I have a fairly large python/c++ program that runs as follow:
. set_env.sh -option A -option B
python run.py
The set_env.sh script modifies the PYTHONPATH and does all sort of export in order to point to the right c++ program.
When running these two commands in the terminal, that works just well, however, using the debugger breaks it all.
I try running ". set_env.sh -option A -option B" in preLaunchTask but it seems the debugger can't see the new PYTHONPATH.
How can I make the debugger run the the set_env and consider the new PYTHONPATH ?

Answer 1

I had a similar problem and could solve it by setting environment variables in the "env" field of the launch.JSON file. This shoudl be stored in a .vscode folder in your project root, here is the docs: https://code.visualstudio.com/docs/python/debugging
I discovered the "env" field in this snippet here: https://gist.github.com/slaveofcode/b4c18efc99c16029913cde3fd2dba3ce
Not sure how to configure this dynamically with the -option A -option B however. Hope this helps :)

Answer 2

Inspired by my current area of work - which involved Python.
This is what I do for Flask.
MS Link
https://code.visualstudio.com/docs/python/debugging
For any regular Python debugging
Evidence
import os
for key in os.environ.keys():
print(f"{key}={os.environ.get(key)}")
After doing a F5 in VS Code with a file containing the above snippet:
Update on Feb 18
After receiving a comment I think the OP wants to run a script before debugging the Fask application. The steps that worked for me are below.
Overview
I ended up with the following files:
Add a PowerShell file dosomething.ps1 (my custom script which I intend to launch before every debug session)
Add a task.json (launch dosomething.ps1)
Edit the existing launch.json by linking it with the task in task.json
The file dosomething.ps1
Write-Host "Inside do something"
Write-Host "The value of the environment variable TEMP is $env:TEMPcls"
Write-Host "The current path of the script is $PSScriptroot"
The file tasks.json
{
"version": "2.0.0",
"tasks": [
{
"label": "my script task",
"type": "shell",
"windows": {
"command": "pwsh -f dosomething.ps1"
},
"problemMatcher": []
}
]
}
Linking the launch.json with task.json
After pressing F5