4 files changed, 95 insertions, 37 deletions

diff --git a/crates/ra_lsp_server/src/project_model/sysroot.rs b/crates/ra_lsp_server/src/project_model/sysroot.rs
index c4028a1fe..1dbab57f8 100644
--- a/crates/ra_lsp_server/src/project_model/sysroot.rs
+++ b/crates/ra_lsp_server/src/project_model/sysroot.rs
@@ -20,7 +20,7 @@ impl_arena_id!(SysrootCrate);
 #[derive(Debug, Clone)]
 struct SysrootCrateData {
     name: SmolStr,
-    path: PathBuf,
+    root: PathBuf,
     deps: Vec<SysrootCrate>,
 }
 
@@ -29,6 +29,10 @@ impl Sysroot {
         self.by_name("std")
     }
 
+    pub(crate) fn crates<'a>(&'a self) -> impl Iterator<Item = SysrootCrate> + 'a {
+        self.crates.iter().map(|(id, _data)| id)
+    }
+
     pub(super) fn discover(cargo_toml: &Path) -> Result<Sysroot> {
         let rustc_output = Command::new("rustc")
             .current_dir(cargo_toml.parent().unwrap())
@@ -45,11 +49,11 @@ impl Sysroot {
             crates: Arena::default(),
         };
         for name in SYSROOT_CRATES.trim().lines() {
-            let path = src.join(format!("lib{}", name)).join("lib.rs");
-            if path.exists() {
+            let root = src.join(format!("lib{}", name)).join("lib.rs");
+            if root.exists() {
                 sysroot.crates.alloc(SysrootCrateData {
                     name: name.into(),
-                    path,
+                    root,
                     deps: Vec::new(),
                 });
             }
@@ -72,6 +76,21 @@ impl Sysroot {
     }
 }
 
+impl SysrootCrate {
+    pub(crate) fn name(self, sysroot: &Sysroot) -> &SmolStr {
+        &sysroot.crates[self].name
+    }
+    pub(crate) fn root(self, sysroot: &Sysroot) -> &Path {
+        sysroot.crates[self].root.as_path()
+    }
+    pub(crate) fn root_dir(self, sysroot: &Sysroot) -> &Path {
+        self.root(sysroot).parent().unwrap()
+    }
+    pub(crate) fn deps<'a>(self, sysroot: &'a Sysroot) -> impl Iterator<Item = SysrootCrate> + 'a {
+        sysroot.crates[self].deps.iter().map(|&it| it)
+    }
+}
+
 const SYSROOT_CRATES: &str = "
 std
 core
diff --git a/crates/ra_lsp_server/src/server_world.rs b/crates/ra_lsp_server/src/server_world.rs
index 2debbe557..4f3c231d3 100644
--- a/crates/ra_lsp_server/src/server_world.rs
+++ b/crates/ra_lsp_server/src/server_world.rs
@@ -44,7 +44,12 @@ impl ServerWorldState {
             for pkg in ws.cargo.packages() {
                 roots.push(pkg.root(&ws.cargo).to_path_buf());
             }
+            for krate in ws.sysroot.crates() {
+                roots.push(krate.root_dir(&ws.sysroot).to_path_buf())
+            }
         }
+        roots.sort();
+        roots.dedup();
         let roots_to_scan = roots.len();
         let (mut vfs, roots) = Vfs::new(roots);
         for r in roots {
@@ -53,16 +58,43 @@ impl ServerWorldState {
         }
 
         let mut crate_graph = CrateGraph::default();
-        let mut pkg_to_lib_crate = FxHashMap::default();
-        let mut pkg_crates = FxHashMap::default();
         for ws in workspaces.iter() {
+            // First, load std
+            let mut sysroot_crates = FxHashMap::default();
+            for krate in ws.sysroot.crates() {
+                if let Some(file_id) = vfs.load(krate.root(&ws.sysroot)) {
+                    let file_id = FileId(file_id.0.into());
+                    sysroot_crates.insert(krate, crate_graph.add_crate_root(file_id));
+                }
+            }
+            for from in ws.sysroot.crates() {
+                for to in from.deps(&ws.sysroot) {
+                    let name = to.name(&ws.sysroot);
+                    if let (Some(&from), Some(&to)) =
+                        (sysroot_crates.get(&from), sysroot_crates.get(&to))
+                    {
+                        crate_graph.add_dep(from, name.clone(), to);
+                    }
+                }
+            }
+
+            let libstd = ws
+                .sysroot
+                .std()
+                .and_then(|it| sysroot_crates.get(&it).map(|&it| it));
+
+            let mut pkg_to_lib_crate = FxHashMap::default();
+            let mut pkg_crates = FxHashMap::default();
+            // Next, create crates for each package, target pair
             for pkg in ws.cargo.packages() {
+                let mut lib_tgt = None;
                 for tgt in pkg.targets(&ws.cargo) {
                     let root = tgt.root(&ws.cargo);
                     if let Some(file_id) = vfs.load(root) {
                         let file_id = FileId(file_id.0.into());
                         let crate_id = crate_graph.add_crate_root(file_id);
                         if tgt.kind(&ws.cargo) == TargetKind::Lib {
+                            lib_tgt = Some(crate_id);
                             pkg_to_lib_crate.insert(pkg, crate_id);
                         }
                         pkg_crates
@@ -71,7 +103,22 @@ impl ServerWorldState {
                             .push(crate_id);
                     }
                 }
+
+                // Set deps to the std and to the lib target of the current package
+                for &from in pkg_crates.get(&pkg).into_iter().flatten() {
+                    if let Some(to) = lib_tgt {
+                        if to != from {
+                            crate_graph.add_dep(from, pkg.name(&ws.cargo).into(), to);
+                        }
+                    }
+                    if let Some(std) = libstd {
+                        crate_graph.add_dep(from, "std".into(), std);
+                    }
+                }
             }
+
+            // Now add a dep ednge from all targets of upstream to the lib
+            // target of downstream.
             for pkg in ws.cargo.packages() {
                 for dep in pkg.dependencies(&ws.cargo) {
                     if let Some(&to) = pkg_to_lib_crate.get(&dep.pkg) {
diff --git a/crates/ra_lsp_server/tests/heavy_tests/main.rs b/crates/ra_lsp_server/tests/heavy_tests/main.rs
index 927664ffb..02d62a259 100644
--- a/crates/ra_lsp_server/tests/heavy_tests/main.rs
+++ b/crates/ra_lsp_server/tests/heavy_tests/main.rs
@@ -1,5 +1,10 @@
 mod support;
 
+use std::{
+    collections::HashMap,
+    time::Instant,
+};
+
 use languageserver_types::{
     CodeActionContext, DocumentFormattingParams, FormattingOptions, Position, Range,
 };
@@ -14,6 +19,7 @@ const LOG: &'static str = "";
 
 #[test]
 fn completes_items_from_standard_library() {
+    let project_start = Instant::now();
     let server = project(
         r#"
 //- Cargo.toml
@@ -22,33 +28,19 @@ name = "foo"
 version = "0.0.0"
 
 //- src/lib.rs
-use std::collections::;
+use std::collections::Spam;
 "#,
     );
     server.wait_for_feedback("workspace loaded");
-    server.request::<Completion>(
-        CompletionParams {
-            text_document: server.doc_id("src/lib.rs"),
-            context: None,
-            position: Position::new(0, 22),
-        },
-        json!([
-          {
-            "filterText": "self",
-            "insertText": "self",
-            "insertTextFormat": 1,
-            "kind": 14,
-            "label": "self"
-          },
-          {
-            "filterText": "super",
-            "insertText": "super",
-            "insertTextFormat": 1,
-            "kind": 14,
-            "label": "super"
-          }
-        ]),
-    );
+    eprintln!("loading took    {:?}", project_start.elapsed());
+    let completion_start = Instant::now();
+    let res = server.send_request::<Completion>(CompletionParams {
+        text_document: server.doc_id("src/lib.rs"),
+        context: None,
+        position: Position::new(0, 23),
+    });
+    assert!(format!("{}", res).contains("HashMap"));
+    eprintln!("completion took {:?}", completion_start.elapsed());
 }
 
 #[test]
@@ -161,7 +153,6 @@ fn test_eggs() {}
     );
 }
 
-use std::collections::HashMap;
 #[test]
 fn test_format_document() {
     let server = project(
diff --git a/crates/ra_lsp_server/tests/heavy_tests/support.rs b/crates/ra_lsp_server/tests/heavy_tests/support.rs
index 7db168b0f..46107b6b6 100644
--- a/crates/ra_lsp_server/tests/heavy_tests/support.rs
+++ b/crates/ra_lsp_server/tests/heavy_tests/support.rs
@@ -93,9 +93,7 @@ impl Server {
         R: Request,
         R::Params: Serialize,
     {
-        let id = self.req_id.get();
-        self.req_id.set(id + 1);
-        let actual = self.send_request::<R>(id, params);
+        let actual = self.send_request::<R>(params);
         match find_mismatch(&expected_resp, &actual) {
             Some((expected_part, actual_part)) => panic!(
                 "JSON mismatch\nExpected:\n{}\nWas:\n{}\nExpected part:\n{}\nActual part:\n{}\n",
@@ -108,11 +106,14 @@ impl Server {
         }
     }
 
-    fn send_request<R>(&self, id: u64, params: R::Params) -> Value
+    pub fn send_request<R>(&self, params: R::Params) -> Value
     where
         R: Request,
         R::Params: Serialize,
     {
+        let id = self.req_id.get();
+        self.req_id.set(id + 1);
+
         let r = RawRequest::new::<R>(id, &params);
         self.send_request_(r)
     }
@@ -178,7 +179,7 @@ impl Server {
 
 impl Drop for Server {
     fn drop(&mut self) {
-        self.send_request::<Shutdown>(666, ());
+        self.send_request::<Shutdown>(());
         let receiver = self.worker.take().unwrap().shutdown();
         while let Some(msg) = recv_timeout(&receiver) {
             drop(msg);
@@ -188,7 +189,7 @@ impl Drop for Server {
 }
 
 fn recv_timeout(receiver: &Receiver<RawMessage>) -> Option<RawMessage> {
-    let timeout = Duration::from_secs(5);
+    let timeout = Duration::from_secs(50);
     select! {
         recv(receiver) -> msg => msg.ok(),
         recv(after(timeout)) -> _ => panic!("timed out"),