3 files changed, 48 insertions, 20 deletions

diff --git a/crates/ra_project_model/src/lib.rs b/crates/ra_project_model/src/lib.rs
index a99612690..7ad941279 100644
--- a/crates/ra_project_model/src/lib.rs
+++ b/crates/ra_project_model/src/lib.rs
@@ -32,6 +32,12 @@ pub enum ProjectWorkspace {
     Json { project: JsonProject },
 }
 
+impl From<JsonProject> for ProjectWorkspace {
+    fn from(project: JsonProject) -> ProjectWorkspace {
+        ProjectWorkspace::Json { project }
+    }
+}
+
 /// `PackageRoot` describes a package root folder.
 /// Which may be an external dependency, or a member of
 /// the current workspace.
@@ -144,11 +150,11 @@ impl ProjectManifest {
 
 impl ProjectWorkspace {
     pub fn load(
-        root: ProjectManifest,
+        manifest: ProjectManifest,
         cargo_features: &CargoConfig,
         with_sysroot: bool,
     ) -> Result<ProjectWorkspace> {
-        let res = match root {
+        let res = match manifest {
             ProjectManifest::ProjectJson(project_json) => {
                 let file = File::open(&project_json).with_context(|| {
                     format!("Failed to open json file {}", project_json.display())
diff --git a/crates/rust-analyzer/src/config.rs b/crates/rust-analyzer/src/config.rs
index 761bc9c2d..0e5dc56fd 100644
--- a/crates/rust-analyzer/src/config.rs
+++ b/crates/rust-analyzer/src/config.rs
@@ -261,6 +261,22 @@ impl Config {
             self.lens = LensConfig::NO_LENS;
         }
 
+        if let Some(linked_projects) = get::<Vec<ManifestOrJsonProject>>(value, "/linkedProjects") {
+            if !linked_projects.is_empty() {
+                self.linked_projects.clear();
+                for linked_project in linked_projects {
+                    let linked_project = match linked_project {
+                        ManifestOrJsonProject::Manifest(it) => match ProjectManifest::from_manifest_file(it) {
+                            Ok(it) => it.into(),
+                            Err(_) => continue,
+                        }
+                        ManifestOrJsonProject::JsonProject(it) => it.into(),
+                    };
+                    self.linked_projects.push(linked_project);
+                }
+            }
+        }
+
         log::info!("Config::update() = {:#?}", self);
 
         fn get<'a, T: Deserialize<'a>>(value: &'a serde_json::Value, pointer: &str) -> Option<T> {
@@ -324,3 +340,10 @@ impl Config {
         }
     }
 }
+
+#[derive(Deserialize)]
+#[serde(untagged)]
+enum ManifestOrJsonProject {
+    Manifest(PathBuf),
+    JsonProject(JsonProject),
+}
diff --git a/crates/rust-analyzer/src/main_loop.rs b/crates/rust-analyzer/src/main_loop.rs
index d901f21d7..1f8f6b978 100644
--- a/crates/rust-analyzer/src/main_loop.rs
+++ b/crates/rust-analyzer/src/main_loop.rs
@@ -105,24 +105,23 @@ pub fn main_loop(config: Config, connection: Connection) -> Result<()> {
                 .linked_projects
                 .iter()
                 .filter_map(|project| match project {
-                    LinkedProject::ProjectManifest(it) => Some(it),
-                    LinkedProject::JsonProject(_) => None,
-                })
-                .filter_map(|root| {
-                    ra_project_model::ProjectWorkspace::load(
-                        root.clone(),
-                        &config.cargo,
-                        config.with_sysroot,
-                    )
-                    .map_err(|err| {
-                        log::error!("failed to load workspace: {:#}", err);
-                        show_message(
-                            lsp_types::MessageType::Error,
-                            format!("rust-analyzer failed to load workspace: {:#}", err),
-                            &connection.sender,
-                        );
-                    })
-                    .ok()
+                    LinkedProject::ProjectManifest(manifest) => {
+                        ra_project_model::ProjectWorkspace::load(
+                            manifest.clone(),
+                            &config.cargo,
+                            config.with_sysroot,
+                        )
+                        .map_err(|err| {
+                            log::error!("failed to load workspace: {:#}", err);
+                            show_message(
+                                lsp_types::MessageType::Error,
+                                format!("rust-analyzer failed to load workspace: {:#}", err),
+                                &connection.sender,
+                            );
+                        })
+                        .ok()
+                    }
+                    LinkedProject::JsonProject(it) => Some(it.clone().into()),
                 })
                 .collect::<Vec<_>>()
         };