Anyone had success with compose-based devcontainers in Qt Creator

galkinvv

Recently I tried switching c++-with-cmake-in-docker linux project (on linux host) to the .devcontainer.json development model using Qt Creator.

While the document lacks full examples, I succeded with building the project within Qt Creator with image-based .devcontainer.json like this (only image name and paths changed from my real project)

{
  "name": "qtc",
  "customizations": {
        "qt-creator": {
            "auto-detect-kits": false,
            "kits": [
                {
                    "name": "qtckit",
                    "compiler": {
                        "Cxx": "/usr/bin/g++",
                        "C": "/usr/bin/gcc"
                    },
                    "cmake": {
                        "binary": "/usr/local/bin/cmake",
                    }
                }
            ]
        }
 },
  "image": "ams21/cmake:3.30.6",
  "workspaceFolder": "/opt"
}

However, I really want to pass some extra options during container creation, so I tried swithced to compose-based-dontainer, replacinf the image line with 2 new lines

  "dockerComposeFile": ["docker-compose.qtc.yaml"],
  "service": "sigleservice",

and, as a starting point create simplest compose file like

services:
  sigleservice:
    image: ams21/cmake:3.30.6
    command: ["/bin/sh", "-c", "while sleep 1000; do :; done"]

And - suddenly Qt creator fails to find cmake inside dev container, reporting "Cannot create cmake tool" error after ending of [Probe User Environment]. On image-based container it reports the success with CMake like `Found CMake tool: "devcontainer://c41a7ce5fa608110ee3836c3c0d912af49b34347376cbf6fa9b1cb6bd3960d05/usr/local/bin/cmake"

In my case it turned out that Qt Creator failed to copy or mount the cmd bridge inside the container. Manualy adding

    volumes:
    - /laptop/opt/qtcreator/libexec/qtcreator/:/devcontainer/libexec

in the compose file resolved the issue.

Was I doing something wrong or default settings for dockerComposeFile-based devcontainers are not-ready-for-general-usage yet?