Merge #3958

3958: Add proc-macro related config and tests r=matklad a=edwin0cheng

This PR do the following things:

1. Add cli argument `proc-macro` for running proc-macro server.
2. Added support for proc-macro in bench and analysis-stats
3. Added typescript config for proc-macros
4. Added an heavy test for proc-macros. 

To test it out: 

1. run `cargo xtask install --proc-macro`
2. add `"rust-analyzer.cargo.loadOutDirsFromCheck": true"` and `"rust-analyzer.procMacro.enabled": true"` in vs code config.

[Edit] Change to use `rust-analyzer proc-macro` for running proc-macro standalone process.

Co-authored-by: Edwin Cheng <[email protected]>

2 files changed, 6 insertions, 0 deletions

diff --git a/editors/code/package.json b/editors/code/package.json
index 5f73c8d83..5ce59e54a 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -388,6 +388,11 @@
                     "description": "Enable logging of VS Code extensions itself",
                     "type": "boolean",
                     "default": false
+                },
+                "rust-analyzer.procMacro.enabled": {
+                    "description": "Enable Proc macro support, cargo.loadOutDirsFromCheck must be enabled.",
+                    "type": "boolean",
+                    "default": false
                 }
             }
         },
diff --git a/editors/code/src/config.ts b/editors/code/src/config.ts
index 35a05131c..3b2eec8ba 100644
--- a/editors/code/src/config.ts
+++ b/editors/code/src/config.ts
@@ -12,6 +12,7 @@ export class Config {
     private readonly requiresReloadOpts = [
         "serverPath",
         "cargo",
+        "procMacro",
         "files",
         "highlighting",
         "updates.channel",