In our project we have a number of files where tabs are strictly required (a format we do not control). However, we want to normalize tabs to spaces throughout the rest of the project.

For now, I just ask that people don't edit those files in VSCode. I even considered adding them to the ignore list for VSCode itself. But it's not uncommon to have file-specific settings, so I thought it would be nice if VSCode allowed for more complex patterns - much like files.exclude, perhaps something like:

"editor.insertSpaces": true,
"diffEditor.ignoreTrimWhitespace": true,
"files.settings": {
  "**/*.idt": {
    "editor.insertSpaces": false,
    "diffEditor.ignoreTrimWhitespace": false
  }
}