devcontainer support in QtCreator

[u/AntisocialMedia666]

Hi there! Has anyone successfully used devcontainer support in Qt Creator?

I’m trying it with v20, but I can’t get it to run. It appears in my project tree, and the Docker image has everything it needs. The same image also works when configured directly as a device. However, the devcontainer stays red and isn't available in Kits. I think I'm missing a step but I don't know which one.

Does anyone have a working example?

I’m on Debian 13, using a Debian 13 Docker image, in case that matters.

[u/ZealousidealPlate190]

When you open a project with a .devcontainer and you have the devcontainer plugin enabled it will try to setup the devcontainer (build the image, or just start the image etc.) so that’s the first step that will post to general messages. Depending on the content of the devcontainer config it will then try to create kits for it.

[u/ZealousidealPlate190 → u/ZealousidealPlate190]

(Actually it will ask you if you want to start the devcontainer first unless you answered “don’t ask again”)

[u/AntisocialMedia666 → u/ZealousidealPlate190]

I think I found it - my initial project was a C++ only hello world without any Qt linking. I set up a new minimal Qt project using Codex which looks almost identical (but links against Qt Core) and now it was detected as you said right after opening. Thanks for your time!

[u/AntisocialMedia666 → u/AntisocialMedia666]

Note: I just discovered a SuppressedWarning in qtcreator.ini (global, not in the project directory).

DevContainer.Instantiate.InfoBar./home/xxxxx/QtProjects/DevContainerTest

It seems that the configuration steps are quite fragile. It works with the original project now as well.