CMakePresets.json schema is too restrictive

Brief Issue Summary

I cannot add the new CMake 3.21 feature “conditions” to the CMakePresets.json without breaking cmake-tools. Or any other feature that might come.

The plugin validates the CMakePresets.json and does not load it. The same issue was seen here https://github.com/microsoft/vscode-cmake-tools/issues/1934, but this Issue is for a more general issue.

Apparent Behaviour

Tooltip:

And no preset found:

Code:

        {
            "name": "x86_64-windows-user-vs2019-Release",
            ...
            "condition": {
                "type": "equals",
                "lhs": "$env{VSCMD_ARG_TGT_ARCH}",
                "rhs": "x64"
            }
        },

Expected:

It should leave the validation to cmake.exe. e.g. you could run cmake --list-presets and then offer those shown (this will also implicitly enable the condition feature).

$ set | grep VSCMD_ARG_TGT_ARCH
VSCMD_ARG_TGT_ARCH=x86

$ cmake --list-presets
Available configure presets:

  "x86-windows-user-vs2019-Release"

CMake Tools Log

[presetController] Invalid kit contents CMakePresets.json (d:\git\xx\CMakePresets.json):
[presetController]  >> /configurePresets/1: should NOT have additional properties
[presetController]  >> /configurePresets/2: should NOT have additional properties

Platform and Versions

• Operating System: Windows
• CMake Version: 3.21.0-rc1
• VSCode Version: 1.57.1
• CMake Tools Extension Version: private build. see https://github.com/microsoft/vscode-cmake-tools/issues/1934
• Compiler/Toolchain: VS2019

[esweet431]

The recommendation is part of the IDE integration guide: https://cmake.org/cmake/help/latest/guide/ide-integration/index.html#presets

[KUGA2]

Kitware’s recommendation to IDEs is to get the information out of the presets file and invoke the CLI with those parameters instead of using --preset.

I have also seen this recommendation but cannot find it anymore. Maybe they removed it? Can you link it?