Merge #8624

8624: Automatically detect rust library source file map  r=vsrs a=vsrs

This PR adds a new possible `rust-analyzer.debug.sourceFileMap` value:
```json
{
    "rust-analyzer.debug.sourceFileMap": "auto"
}
```

I did not make it the default because it uses two shell calls (`rustc --print sysroot` and `rustc -V -v`). First one can be slow (https://github.com/rust-lang/rustup/issues/783)

Fixes #8619

Co-authored-by: vsrs <[email protected]>

1 files changed, 3 insertions, 2 deletions

diff --git a/editors/code/package.json b/editors/code/package.json
index 97d92e43c..35b50e669 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -353,8 +353,9 @@
                         "Use [MS C++ tools](https://marketplace.visualstudio.com/items?itemName=ms-vscode.cpptools)"
                     ]
                 },
-                "rust-analyzer.debug.sourceFileMap": {
-                    "type": "object",
+                "rust-analyzer.debug.sourceFileMap": {                    
+                    "type": ["object", "string"],
+                    "const": "auto",
                     "description": "Optional source file mappings passed to the debug engine.",
                     "default": {
                         "/rustc/<id>": "${env:USERPROFILE}/.rustup/toolchains/<toolchain-id>/lib/rustlib/src/rust"