Update clang-format settings to support file:

[EcotechBrad]

Feature Request

in Clang-format v14 you can specify a file path using -style=file:<path-to-file>
however, variable expansions do not work in setting "C_Cpp.clang_format_style"

i.e something like "C_Cpp.clang_format_style": "file:${workspaceFolder}/tools/.clang-format" is not expanded, and returns

Formatting failed:
"C:\Program Files\LLVM\bin\clang-format.exe" -style=file:${workspacefolder}/tools/.clang-format

if someone could point me to where variables like clangFormatPath are expanded i could open a PR myself,

i've already tried adding util.resolveVariables in client.ts mimicking settings_clangFormatPath.push(util.resolveVariables(setting.clangFormatPath, this.AdditionalEnvironment));

  commit: 5d736cc6c8e07be89b1b79a2ceb124243304a434 file client.ts line 1125
  settings_clangFormatStyle.push(util.resolveVariables(setting.clangFormatStyle, this.AdditionalEnvironment)); 

however no luck.

[sean-mcmanus]

Thanks for reporting this. The resolving of the ${workspaceFolder} is done in our closed source code -- it should be fixed in 1.13.0.

[sean-mcmanus]

Fixed with https://github.com/microsoft/vscode-cpptools/releases/tag/v1.13.0 .