Intellisense not listing files when plugin active

[markmaker]

Description

Intellisense does not seem to list the project C/C++ files correctly, when under control of the meson plugin. It only sees files currently open in the IDE, or #include-d by the open files. "Go to Definition", "Find All References" etc. only work in that limited scope.

As soon as I deactivated the plugin it started to work again.

Our workspace is special in that the meson project is in a subdirectory (actually a git submodule). Maybe that could be the reason. The meson build commands work correctly, and the project is still correctly shown in the tree. But Intellisense is broken.

[tristan957]

Sounds pretty special to your environment. A language server is only going to be useful for the files it knows about, those in the compilation database.

[markmaker]

Sounds pretty special to your environment.

I don't know how you mean that. I consider it perfectly normal to have the main meson project in a subdirectory, especially since this is a git submodule that covers the C/C++ part of a larger project.

The Meson sidebar discovers the project perfectly:

The build comands work:

But IntelliSense is broken, as described above. When I enable the Meson plugin, I get this "Configuration Provider" set in Extensions > C/C++ > IntelliSense:

Then it no longer works. And I can't change the value, it is always set back to "mesonbuild.mesonbuild".

However, I just found how to disable that. Add this to .vscode/settings.json

"mesonbuild.modifySettings": false,

This seems to make it behave.

Still, this appears to be a bug.

[tristan957]

What does "intellisense not listing files" mean?

[markmaker]

Somehow IntelliSense needs to know which .cpp files to scan. I assumed it will use the builddir/compile_commands.json 'file' entries. I set the C_Cpp › Default: Compile Commands correctly, but somehow it is not used by IntelliSense, or at least not to list the files, as long as "Configuration Provider" is set to "mesonbuild.mesonbuild".

[tristan957]

How do you know it isn't used?

[markmaker]

Like I initially described, "Go to Definition", "Find All References" etc. only work in the limited scope of opened files. As soon as I remove Meson plugin from the equation, either by disabling it, or by "mesonbuild.modifySettings": false, (and restarting the IDE), IntelliSense starts to scan all files. "Go to Definition", "Find All References" etc. start to work.

[tristan957]

I don't understand your project layout. Do you have C/C++ files outside of the submodule that you're trying to use "Go to Definition" or "Find All References" on?

[markmaker]

There is a toplevel project, that contains various git submodules. The submodules cover different technologies and/or programming languages. One of them is a C/C++ project with a meson.build file.

-- top
  |-- cpp project
  |  |-- meson.build
  |  |-- subprojects
  |  |   ` - various
  |  |-- src
  |     |-- file1.cpp
  |     |-- file2.cpp
  |-- other stuff

This should be a normal use case.

And like I said: the other functions like building or showing the project tree, work.