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, 7 insertions, 4 deletions

diff --git a/crates/ra_proc_macro_srv/src/main.rs b/crates/ra_proc_macro_srv/src/cli.rs
index 70743c1f4..c771f2b38 100644
--- a/crates/ra_proc_macro_srv/src/main.rs
+++ b/crates/ra_proc_macro_srv/src/cli.rs
@@ -1,7 +1,7 @@
 //! Driver for proc macro server
 
+use crate::{expand_task, list_macros};
 use ra_proc_macro::msg::{self, Message};
-use ra_proc_macro_srv::{expand_task, list_macros};
 
 use std::io;
 
@@ -24,7 +24,8 @@ fn write_response(res: Result<msg::Response, String>) -> Result<(), io::Error> {
     let mut stdout = stdout.lock();
     msg.write(&mut stdout)
 }
-fn main() {
+
+pub fn run() {
     loop {
         let req = match read_request() {
             Err(err) => {
diff --git a/crates/ra_proc_macro_srv/src/lib.rs b/crates/ra_proc_macro_srv/src/lib.rs
index 59716cbb3..c62b0ed89 100644
--- a/crates/ra_proc_macro_srv/src/lib.rs
+++ b/crates/ra_proc_macro_srv/src/lib.rs
@@ -22,7 +22,7 @@ mod dylib;
 use proc_macro::bridge::client::TokenStream;
 use ra_proc_macro::{ExpansionResult, ExpansionTask, ListMacrosResult, ListMacrosTask};
 
-pub fn expand_task(task: &ExpansionTask) -> Result<ExpansionResult, String> {
+pub(crate) fn expand_task(task: &ExpansionTask) -> Result<ExpansionResult, String> {
     let expander = dylib::Expander::new(&task.lib)
         .expect(&format!("Cannot expand with provided libraries: ${:?}", &task.lib));
 
@@ -39,7 +39,7 @@ pub fn expand_task(task: &ExpansionTask) -> Result<ExpansionResult, String> {
     }
 }
 
-pub fn list_macros(task: &ListMacrosTask) -> Result<ListMacrosResult, String> {
+pub(crate) fn list_macros(task: &ListMacrosTask) -> Result<ListMacrosResult, String> {
     let expander = dylib::Expander::new(&task.lib)
         .expect(&format!("Cannot expand with provided libraries: ${:?}", &task.lib));
 
@@ -53,5 +53,7 @@ pub fn list_macros(task: &ListMacrosTask) -> Result<ListMacrosResult, String> {
     }
 }
 
+pub mod cli;
+
 #[cfg(test)]
 mod tests;