Move project discovery

Author: matklad

crates/ra_project_model/src/lib.rs

@@ -14,7 +14,7 @@ use std::{
 use anyhow::{bail, Context, Result};
 use ra_cfg::CfgOptions;
 use ra_db::{CrateGraph, CrateName, Edition, Env, ExternSource, ExternSourceId, FileId};
-use rustc_hash::FxHashMap;
+use rustc_hash::{FxHashMap, FxHashSet};
 use serde_json::from_reader;
 
 pub use crate::{
@@ -57,7 +57,7 @@ impl PackageRoot {
     }
 }
 
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash, Ord, PartialOrd)]
 pub enum ProjectRoot {
     ProjectJson(PathBuf),
     CargoToml(PathBuf),
@@ -128,6 +128,18 @@ impl ProjectRoot {
                 .collect()
         }
     }
+
+    pub fn discover_all(paths: &[impl AsRef<Path>]) -> Vec<ProjectRoot> {
+        let mut res = paths
+            .iter()
+            .filter_map(|it| ProjectRoot::discover(it.as_ref()).ok())
+            .flatten()
+            .collect::<FxHashSet<_>>()
+            .into_iter()
+            .collect::<Vec<_>>();
+        res.sort();
+        res
+    }
 }
 
 impl ProjectWorkspace {

crates/rust-analyzer/src/main_loop.rs

@@ -28,7 +28,7 @@ use lsp_types::{
 use ra_flycheck::{CheckTask, Status};
 use ra_ide::{Canceled, FileId, LibraryData, LineIndex, SourceRootId};
 use ra_prof::profile;
-use ra_project_model::{PackageRoot, ProjectWorkspace};
+use ra_project_model::{PackageRoot, ProjectRoot, ProjectWorkspace};
 use ra_vfs::{VfsFile, VfsTask, Watch};
 use relative_path::RelativePathBuf;
 use rustc_hash::FxHashSet;
@@ -96,11 +96,7 @@ pub fn main_loop(ws_roots: Vec<PathBuf>, config: Config, connection: Connection)
     let mut global_state = {
         let workspaces = {
             // FIXME: support dynamic workspace loading.
-            let project_roots: FxHashSet<_> = ws_roots
-                .iter()
-                .filter_map(|it| ra_project_model::ProjectRoot::discover(it).ok())
-                .flatten()
-                .collect();
+            let project_roots = ProjectRoot::discover_all(&ws_roots);
 
             if project_roots.is_empty() && config.notifications.cargo_toml_not_found {
                 show_message(