swtich lsp server to vfs

1 files changed, 81 insertions, 122 deletions

diff --git a/crates/ra_lsp_server/src/server_world.rs b/crates/ra_lsp_server/src/server_world.rs
index c0d1338a2..f2fd09e85 100644
--- a/crates/ra_lsp_server/src/server_world.rs
+++ b/crates/ra_lsp_server/src/server_world.rs
@@ -1,154 +1,62 @@
 use std::{
-    fs,
-    path::{Path, PathBuf},
+    path::{PathBuf},
     sync::Arc,
 };
 
 use languageserver_types::Url;
 use ra_analysis::{
     Analysis, AnalysisChange, AnalysisHost, CrateGraph, FileId, LibraryData,
+    SourceRootId
 };
+use ra_vfs::{Vfs, VfsChange, VfsFile};
 use rustc_hash::FxHashMap;
-use failure::{bail, format_err};
+use relative_path::RelativePathBuf;
+use parking_lot::RwLock;
+use failure::{format_err};
 
 use crate::{
-    path_map::{PathMap, Root},
     project_model::{CargoWorkspace, TargetKind},
-    vfs::{FileEvent, FileEventKind},
     Result,
 };
 
-#[derive(Debug, Default)]
+#[derive(Debug)]
 pub struct ServerWorldState {
     pub workspaces: Arc<Vec<CargoWorkspace>>,
     pub analysis_host: AnalysisHost,
-    pub path_map: PathMap,
-    pub mem_map: FxHashMap<FileId, Option<String>>,
+    pub vfs: Arc<RwLock<Vfs>>,
 }
 
 pub struct ServerWorld {
     pub workspaces: Arc<Vec<CargoWorkspace>>,
     pub analysis: Analysis,
-    pub path_map: PathMap,
+    pub vfs: Arc<RwLock<Vfs>>,
 }
 
 impl ServerWorldState {
-    pub fn apply_fs_changes(&mut self, events: Vec<FileEvent>) {
+    pub fn new(root: PathBuf, workspaces: Vec<CargoWorkspace>) -> ServerWorldState {
         let mut change = AnalysisChange::new();
-        let mut inserted = false;
-        {
-            let pm = &mut self.path_map;
-            let mm = &mut self.mem_map;
-            events
-                .into_iter()
-                .map(|event| {
-                    let text = match event.kind {
-                        FileEventKind::Add(text) => text,
-                    };
-                    (event.path, text)
-                })
-                .map(|(path, text)| {
-                    let (ins, file_id) = pm.get_or_insert(path, Root::Workspace);
-                    inserted |= ins;
-                    (file_id, text)
-                })
-                .filter_map(|(file_id, text)| {
-                    if mm.contains_key(&file_id) {
-                        mm.insert(file_id, Some(text));
-                        None
-                    } else {
-                        Some((file_id, text))
-                    }
-                })
-                .for_each(|(file_id, text)| change.add_file(file_id, text));
-        }
-        if inserted {
-            change.set_file_resolver(Arc::new(self.path_map.clone()))
-        }
-        self.analysis_host.apply_change(change);
-    }
-    pub fn events_to_files(
-        &mut self,
-        events: Vec<FileEvent>,
-    ) -> (Vec<(FileId, String)>, Arc<FileResolver>) {
-        let files = {
-            let pm = &mut self.path_map;
-            events
-                .into_iter()
-                .map(|event| {
-                    let FileEventKind::Add(text) = event.kind;
-                    (event.path, text)
-                })
-                .map(|(path, text)| (pm.get_or_insert(path, Root::Lib).1, text))
-                .collect()
-        };
-        let resolver = Arc::new(self.path_map.clone());
-        (files, resolver)
-    }
-    pub fn add_lib(&mut self, data: LibraryData) {
-        let mut change = AnalysisChange::new();
-        change.add_library(data);
-        self.analysis_host.apply_change(change);
-    }
 
-    pub fn add_mem_file(&mut self, path: PathBuf, text: String) -> FileId {
-        let (inserted, file_id) = self.path_map.get_or_insert(path, Root::Workspace);
-        if self.path_map.get_root(file_id) != Root::Lib {
-            let mut change = AnalysisChange::new();
-            if inserted {
-                change.add_file(file_id, text);
-                change.set_file_resolver(Arc::new(self.path_map.clone()));
-            } else {
-                change.change_file(file_id, text);
+        let mut roots = Vec::new();
+        roots.push(root);
+        for ws in workspaces.iter() {
+            for pkg in ws.packages() {
+                roots.push(pkg.root(&ws).to_path_buf());
             }
-            self.analysis_host.apply_change(change);
         }
-        self.mem_map.insert(file_id, None);
-        file_id
-    }
-
-    pub fn change_mem_file(&mut self, path: &Path, text: String) -> Result<()> {
-        let file_id = self
-            .path_map
-            .get_id(path)
-            .ok_or_else(|| format_err!("change to unknown file: {}", path.display()))?;
-        if self.path_map.get_root(file_id) != Root::Lib {
-            let mut change = AnalysisChange::new();
-            change.change_file(file_id, text);
-            self.analysis_host.apply_change(change);
+        let (mut vfs, roots) = Vfs::new(roots);
+        for r in roots {
+            change.add_root(SourceRootId(r.0));
         }
-        Ok(())
-    }
 
-    pub fn remove_mem_file(&mut self, path: &Path) -> Result<FileId> {
-        let file_id = self
-            .path_map
-            .get_id(path)
-            .ok_or_else(|| format_err!("change to unknown file: {}", path.display()))?;
-        match self.mem_map.remove(&file_id) {
-            Some(_) => (),
-            None => bail!("unmatched close notification"),
-        };
-        // Do this via file watcher ideally.
-        let text = fs::read_to_string(path).ok();
-        if self.path_map.get_root(file_id) != Root::Lib {
-            let mut change = AnalysisChange::new();
-            if let Some(text) = text {
-                change.change_file(file_id, text);
-            }
-            self.analysis_host.apply_change(change);
-        }
-        Ok(file_id)
-    }
-    pub fn set_workspaces(&mut self, ws: Vec<CargoWorkspace>) {
         let mut crate_graph = CrateGraph::default();
         let mut pkg_to_lib_crate = FxHashMap::default();
         let mut pkg_crates = FxHashMap::default();
-        for ws in ws.iter() {
+        for ws in workspaces.iter() {
             for pkg in ws.packages() {
                 for tgt in pkg.targets(ws) {
                     let root = tgt.root(ws);
-                    if let Some(file_id) = self.path_map.get_id(root) {
+                    if let Some(file_id) = vfs.load(root) {
+                        let file_id = FileId(file_id.0);
                         let crate_id = crate_graph.add_crate_root(file_id);
                         if tgt.kind(ws) == TargetKind::Lib {
                             pkg_to_lib_crate.insert(pkg, crate_id);
@@ -170,16 +78,64 @@ impl ServerWorldState {
                 }
             }
         }
-        self.workspaces = Arc::new(ws);
-        let mut change = AnalysisChange::new();
         change.set_crate_graph(crate_graph);
+
+        let mut analysis_host = AnalysisHost::default();
+        analysis_host.apply_change(change);
+        ServerWorldState {
+            workspaces: Arc::new(workspaces),
+            analysis_host,
+            vfs: Arc::new(RwLock::new(vfs)),
+        }
+    }
+
+    /// Returns a vec of libraries
+    /// FIXME: better API here
+    pub fn process_changes(
+        &mut self,
+    ) -> Vec<(SourceRootId, Vec<(FileId, RelativePathBuf, Arc<String>)>)> {
+        let mut libs = Vec::new();
+        let mut change = AnalysisChange::new();
+        for c in self.vfs.write().commit_changes() {
+            match c {
+                VfsChange::AddRoot { root, files } => {
+                    let files = files
+                        .into_iter()
+                        .map(|(vfsfile, path, text)| (FileId(vfsfile.0), path, text))
+                        .collect();
+                    libs.push((SourceRootId(root.0), files));
+                }
+                VfsChange::AddFile {
+                    root,
+                    file,
+                    path,
+                    text,
+                } => {
+                    change.add_file(SourceRootId(root.0), FileId(file.0), path, text);
+                }
+                VfsChange::RemoveFile { root, file, path } => {
+                    change.remove_file(SourceRootId(root.0), FileId(file.0), path)
+                }
+                VfsChange::ChangeFile { file, text } => {
+                    change.change_file(FileId(file.0), text);
+                }
+            }
+        }
         self.analysis_host.apply_change(change);
+        libs
     }
+
+    pub fn add_lib(&mut self, data: LibraryData) {
+        let mut change = AnalysisChange::new();
+        change.add_library(data);
+        self.analysis_host.apply_change(change);
+    }
+
     pub fn snapshot(&self) -> ServerWorld {
         ServerWorld {
             workspaces: Arc::clone(&self.workspaces),
             analysis: self.analysis_host.analysis(),
-            path_map: self.path_map.clone(),
+            vfs: Arc::clone(&self.vfs),
         }
     }
 }
@@ -193,15 +149,18 @@ impl ServerWorld {
         let path = uri
             .to_file_path()
             .map_err(|()| format_err!("invalid uri: {}", uri))?;
-        self.path_map
-            .get_id(&path)
-            .ok_or_else(|| format_err!("unknown file: {}", path.display()))
+        let file = self
+            .vfs
+            .read()
+            .path2file(&path)
+            .ok_or_else(|| format_err!("unknown file: {}", path.display()))?;
+        Ok(FileId(file.0))
     }
 
     pub fn file_id_to_uri(&self, id: FileId) -> Result<Url> {
-        let path = self.path_map.get_path(id);
-        let url = Url::from_file_path(path)
-            .map_err(|()| format_err!("can't convert path to url: {}", path.display()))?;
+        let path = self.vfs.read().file2path(VfsFile(id.0));
+        let url = Url::from_file_path(&path)
+            .map_err(|_| format_err!("can't convert path to url: {}", path.display()))?;
         Ok(url)
     }
 }