Add test for proc-macro meta info retrieval

crates/proc_macro_api/src/lib.rs

@@ -23,6 +23,7 @@ use tt::{SmolStr, Subtree};
 use crate::process::{ProcMacroProcessSrv, ProcMacroProcessThread};
 
 pub use rpc::{ExpansionResult, ExpansionTask, ListMacrosResult, ListMacrosTask, ProcMacroKind};
+pub use version::{read_dylib_info, RustCInfo};
 
 #[derive(Debug, Clone)]
 struct ProcMacroProcessExpander {
@@ -76,7 +77,7 @@ impl ProcMacroClient {
     }
 
     pub fn by_dylib_path(&self, dylib_path: &Path) -> Vec<ProcMacro> {
-        match version::read_info(dylib_path) {
+        match version::read_dylib_info(dylib_path) {
             Ok(info) => {
                 if info.version.0 < 1 || info.version.1 < 47 {
                     eprintln!("proc-macro {} built by {:#?} is not supported by Rust Analyzer, please update your rust version.", dylib_path.to_string_lossy(), info);

crates/proc_macro_api/src/version.rs

@@ -11,14 +11,15 @@ use object::read::{File as BinaryFile, Object, ObjectSection};
 use snap::read::FrameDecoder as SnapDecoder;
 
 #[derive(Debug)]
-pub(crate) struct RustCInfo {
-    pub(crate) version: (usize, usize, usize),
-    pub(crate) channel: String,
-    pub(crate) commit: String,
-    pub(crate) date: String,
+pub struct RustCInfo {
+    pub version: (usize, usize, usize),
+    pub channel: String,
+    pub commit: String,
+    pub date: String,
 }
 
-pub(crate) fn read_info(dylib_path: &Path) -> io::Result<RustCInfo> {
+/// Read rustc dylib information
+pub fn read_dylib_info(dylib_path: &Path) -> io::Result<RustCInfo> {
     macro_rules! err {
         ($e:literal) => {
             io::Error::new(io::ErrorKind::InvalidData, $e)

crates/proc_macro_srv/src/tests/mod.rs

@@ -56,3 +56,10 @@ DummyTrait [CustomDerive]"#,
         &res
     );
 }
+
+#[test]
+fn test_version_check() {
+    let path = fixtures::dylib_path("proc_macro_test", "0.0.0");
+    let info = proc_macro_api::read_dylib_info(&path).unwrap();
+    assert!(info.version.1 >= 50);
+}

crates/proc_macro_srv/src/tests/utils.rs

@@ -6,7 +6,7 @@ use proc_macro_api::ListMacrosTask;
 use std::str::FromStr;
 use test_utils::assert_eq_text;
 
-mod fixtures {
+pub mod fixtures {
     use cargo_metadata::Message;
     use std::path::PathBuf;
     use std::process::Command;