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|
use std::{
path::{Path, PathBuf},
sync::Arc,
};
use lsp_types::Url;
use ra_ide_api::{
Analysis, AnalysisChange, AnalysisHost, CrateGraph, FileId, LibraryData,
SourceRootId
};
use ra_vfs::{Vfs, VfsChange, VfsFile, VfsRoot};
use relative_path::RelativePathBuf;
use parking_lot::RwLock;
use failure::{Error, format_err};
use gen_lsp_server::ErrorCode;
use crate::{
main_loop::pending_requests::{CompletedRequest, LatestRequests},
project_model::ProjectWorkspace,
vfs_filter::IncludeRustFiles,
Result,
LspError,
};
/// `WorldState` is the primary mutable state of the language server
///
/// The most interesting components are `vfs`, which stores a consistent
/// snapshot of the file systems, and `analysis_host`, which stores our
/// incremental salsa database.
#[derive(Debug)]
pub struct WorldState {
pub roots_to_scan: usize,
pub roots: Vec<PathBuf>,
pub workspaces: Arc<Vec<ProjectWorkspace>>,
pub analysis_host: AnalysisHost,
pub vfs: Arc<RwLock<Vfs>>,
pub latest_requests: Arc<RwLock<LatestRequests>>,
}
/// An immutable snapshot of the world's state at a point in time.
pub struct WorldSnapshot {
pub workspaces: Arc<Vec<ProjectWorkspace>>,
pub analysis: Analysis,
pub vfs: Arc<RwLock<Vfs>>,
pub latest_requests: Arc<RwLock<LatestRequests>>,
}
impl WorldState {
pub fn new(
folder_roots: Vec<PathBuf>,
workspaces: Vec<ProjectWorkspace>,
lru_capacity: Option<usize>,
) -> WorldState {
let mut change = AnalysisChange::new();
let mut roots = Vec::new();
roots.extend(folder_roots.iter().cloned().map(IncludeRustFiles::member));
for ws in workspaces.iter() {
roots.extend(IncludeRustFiles::from_roots(ws.to_roots()));
}
let (mut vfs, vfs_roots) = Vfs::new(roots);
let roots_to_scan = vfs_roots.len();
for r in vfs_roots {
let vfs_root_path = vfs.root2path(r);
let is_local = folder_roots.iter().any(|it| vfs_root_path.starts_with(it));
change.add_root(SourceRootId(r.0), is_local);
}
// Create crate graph from all the workspaces
let mut crate_graph = CrateGraph::default();
let mut load = |path: &std::path::Path| {
let vfs_file = vfs.load(path);
vfs_file.map(|f| FileId(f.0))
};
for ws in workspaces.iter() {
crate_graph.extend(ws.to_crate_graph(&mut load));
}
change.set_crate_graph(crate_graph);
let mut analysis_host = AnalysisHost::new(lru_capacity);
analysis_host.apply_change(change);
WorldState {
roots_to_scan,
roots: folder_roots,
workspaces: Arc::new(workspaces),
analysis_host,
vfs: Arc::new(RwLock::new(vfs)),
latest_requests: Default::default(),
}
}
/// Returns a vec of libraries
/// FIXME: better API here
pub fn process_changes(
&mut self,
) -> Vec<(SourceRootId, Vec<(FileId, RelativePathBuf, Arc<String>)>)> {
let changes = self.vfs.write().commit_changes();
if changes.is_empty() {
return Vec::new();
}
let mut libs = Vec::new();
let mut change = AnalysisChange::new();
for c in changes {
match c {
VfsChange::AddRoot { root, files } => {
let root_path = self.vfs.read().root2path(root);
let is_local = self.roots.iter().any(|r| root_path.starts_with(r));
if is_local {
self.roots_to_scan -= 1;
for (file, path, text) in files {
change.add_file(SourceRootId(root.0), FileId(file.0), path, text);
}
} else {
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) {
self.roots_to_scan -= 1;
let mut change = AnalysisChange::new();
change.add_library(data);
self.analysis_host.apply_change(change);
}
pub fn snapshot(&self) -> WorldSnapshot {
WorldSnapshot {
workspaces: Arc::clone(&self.workspaces),
analysis: self.analysis_host.analysis(),
vfs: Arc::clone(&self.vfs),
latest_requests: Arc::clone(&self.latest_requests),
}
}
pub fn maybe_collect_garbage(&mut self) {
self.analysis_host.maybe_collect_garbage()
}
pub fn collect_garbage(&mut self) {
self.analysis_host.collect_garbage()
}
pub fn complete_request(&mut self, request: CompletedRequest) {
self.latest_requests.write().record(request)
}
}
impl WorldSnapshot {
pub fn analysis(&self) -> &Analysis {
&self.analysis
}
pub fn uri_to_file_id(&self, uri: &Url) -> Result<FileId> {
let path = uri.to_file_path().map_err(|()| format_err!("invalid uri: {}", uri))?;
let file = self.vfs.read().path2file(&path).ok_or_else(|| {
// Show warning as this file is outside current workspace
Error::from(LspError {
code: ErrorCode::InvalidRequest as i32,
message: "Rust file outside current workspace is not supported yet.".to_string(),
})
})?;
Ok(FileId(file.0))
}
pub fn file_id_to_uri(&self, id: FileId) -> Result<Url> {
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)
}
pub fn path_to_uri(&self, root: SourceRootId, path: &RelativePathBuf) -> Result<Url> {
let base = self.vfs.read().root2path(VfsRoot(root.0));
let path = path.to_path(base);
let url = Url::from_file_path(&path)
.map_err(|_| format_err!("can't convert path to url: {}", path.display()))?;
Ok(url)
}
pub fn status(&self) -> String {
let mut res = String::new();
if self.workspaces.is_empty() {
res.push_str("no workspaces\n")
} else {
res.push_str("workspaces:\n");
for w in self.workspaces.iter() {
res += &format!("{} packages loaded\n", w.count());
}
}
res.push_str("\nanalysis:\n");
res.push_str(&self.analysis.status());
res
}
pub fn workspace_root_for(&self, file_id: FileId) -> Option<&Path> {
let path = self.vfs.read().file2path(VfsFile(file_id.0));
self.workspaces.iter().find_map(|ws| ws.workspace_root_for(&path))
}
}
|
