Debugging using Visual Studio Code and piping terminal output to a file - visual-studio-code

Question

I am using VS Code to debug an application on Ubuntu, using a launch.json file and cmake to build and debug. This works fine and I can see the output of the program in the terminal as expected. However, I would like to automatically save this output to a file. The way I would do this typically would be something like mycommand > terminal_output.txt, however I can't find a way of replicating this using the launch.json file, or alternatively of running the debug through the terminal (e.g. something along the lines of debug --flags launch.json > terminal_output.txt).
Here is my launch.json for reference:
{
"version": "0.2.0",
"configurations": [
{
"name": "g++-8 build and debug active file",
"type": "cppdbg",
"request": "launch",
"program": "${fileDirname}/${fileBasenameNoExtension}",
"stopAtEntry": false,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
],
"preLaunchTask": "g++-8 build active file",
"miDebuggerPath": "/usr/bin/gdb"
}
]
}
Is there a way of doing this in a simple way?

Answer 1

Since I am using cmake, I was able to achieve this using cmake.debugConfig in my settings.json file:
{
"cmake.debugConfig": {
"args": [
">",
"test.txt"
]
}
}
Adding "args" in launch.json, however, did not work.

Answer 2

install CodeLLDB extension
launch.log: inside a CodeLLDB launch configuration add
"stdio": [null, null, "debug.log"] // stdin/stdout/stderr
stdio redirection for CodeLLDB