when loading workspace, say how many packages were loaded

this should help to debug configuration issues, when you see `0
packages loaded` or something like that.

3 files changed, 21 insertions, 22 deletions

diff --git a/crates/ra_lsp_server/src/main_loop.rs b/crates/ra_lsp_server/src/main_loop.rs
index d0c2a95ef..eecf278a8 100644
--- a/crates/ra_lsp_server/src/main_loop.rs
+++ b/crates/ra_lsp_server/src/main_loop.rs
@@ -248,8 +248,10 @@ fn main_loop_inner(
             && pending_libraries.is_empty()
             && in_flight_libraries == 0
         {
+            let n_packages: usize = state.workspaces.iter().map(|it| it.count()).sum();
             if options.show_workspace_loaded {
-                show_message(req::MessageType::Info, "workspace loaded", msg_sender);
+                let msg = format!("workspace loaded, {} rust packages", n_packages);
+                show_message(req::MessageType::Info, msg, msg_sender);
             }
             // Only send the notification first time
             send_workspace_notification = false;
@@ -508,12 +510,10 @@ fn update_file_notifications_on_threadpool(
     });
 }
 
-fn show_message<M: Into<String>>(typ: req::MessageType, msg: M, sender: &Sender<RawMessage>) {
-    let not = RawNotification::new::<req::ShowMessage>(&req::ShowMessageParams {
-        typ,
-        message: msg.into(),
-    });
-
+fn show_message(typ: req::MessageType, message: impl Into<String>, sender: &Sender<RawMessage>) {
+    let message = message.into();
+    let params = req::ShowMessageParams { typ, message };
+    let not = RawNotification::new::<req::ShowMessage>(&params);
     sender.send(not.into()).unwrap();
 }
 
diff --git a/crates/ra_lsp_server/tests/heavy_tests/main.rs b/crates/ra_lsp_server/tests/heavy_tests/main.rs
index 41c240139..6ae541ec6 100644
--- a/crates/ra_lsp_server/tests/heavy_tests/main.rs
+++ b/crates/ra_lsp_server/tests/heavy_tests/main.rs
@@ -32,7 +32,7 @@ version = "0.0.0"
 use std::collections::Spam;
 "#,
     );
-    server.wait_for_message("workspace loaded");
+    server.wait_until_workspace_is_loaded();
     eprintln!("loading took    {:?}", project_start.elapsed());
     let completion_start = Instant::now();
     let res = server.send_request::<Completion>(CompletionParams {
@@ -54,7 +54,7 @@ fn foo() {
 }
 ",
     );
-    server.wait_for_message("workspace loaded");
+    server.wait_until_workspace_is_loaded();
     server.request::<Runnables>(
         RunnablesParams { text_document: server.doc_id("lib.rs"), position: None },
         json!([
@@ -108,7 +108,7 @@ pub fn foo() {}
 fn test_eggs() {}
 "#,
     );
-    server.wait_for_message("workspace loaded");
+    server.wait_until_workspace_is_loaded();
     server.request::<Runnables>(
         RunnablesParams {
             text_document: server.doc_id("tests/spam.rs"),
@@ -168,7 +168,7 @@ fn main() {
 pub use std::collections::HashMap;
 "#,
     );
-    server.wait_for_message("workspace loaded");
+    server.wait_until_workspace_is_loaded();
 
     server.request::<Formatting>(
         DocumentFormattingParams {
@@ -217,7 +217,7 @@ mod bar;
 fn main() {}
 "#,
     );
-    server.wait_for_message("workspace loaded");
+    server.wait_until_workspace_is_loaded();
     let empty_context = || CodeActionContext { diagnostics: Vec::new(), only: None };
     server.request::<CodeActionRequest>(
         CodeActionParams {
@@ -279,7 +279,7 @@ fn main() {}
         PATH = tmp_dir.path().display()
     );
     let server = project_with_tmpdir(tmp_dir, &code);
-    server.wait_for_message("workspace loaded");
+    server.wait_until_workspace_is_loaded();
     let empty_context = || CodeActionContext { diagnostics: Vec::new(), only: None };
     server.request::<CodeActionRequest>(
         CodeActionParams {
diff --git a/crates/ra_lsp_server/tests/heavy_tests/support.rs b/crates/ra_lsp_server/tests/heavy_tests/support.rs
index e02d7858e..ab9db3dd4 100644
--- a/crates/ra_lsp_server/tests/heavy_tests/support.rs
+++ b/crates/ra_lsp_server/tests/heavy_tests/support.rs
@@ -145,26 +145,25 @@ impl Server {
         }
         panic!("no response");
     }
-    pub fn wait_for_message(&self, message: &str) {
-        self.wait_for_message_n(message, 1)
-    }
-    pub fn wait_for_message_n(&self, message: &str, n: usize) {
-        let f = |msg: &RawMessage| match msg {
+    pub fn wait_until_workspace_is_loaded(&self) {
+        self.wait_for_message_cond(1, &|msg: &RawMessage| match msg {
             RawMessage::Notification(n) if n.method == ShowMessage::METHOD => {
                 let msg = n.clone().cast::<req::ShowMessage>().unwrap();
-                msg.message == message
+                msg.message.starts_with("workspace loaded")
             }
             _ => false,
-        };
+        })
+    }
+    fn wait_for_message_cond(&self, n: usize, cond: &dyn Fn(&RawMessage) -> bool) {
         let mut total = 0;
         for msg in self.messages.borrow().iter() {
-            if f(msg) {
+            if cond(msg) {
                 total += 1
             }
         }
         while total < n {
             let msg = self.recv().expect("no response");
-            if f(&msg) {
+            if cond(&msg) {
                 total += 1;
             }
         }