crates/ra_lsp_server/src/server_world.rs

   1 use std::{
   2     path::PathBuf,
   3     sync::Arc,
   4 };
   5
   6 use languageserver_types::Url;
   7 use ra_ide_api::{
   8     Analysis, AnalysisChange, AnalysisHost, CrateGraph, FileId, LibraryData,
   9     SourceRootId
  10 };
  11 use ra_vfs::{Vfs, VfsChange, VfsFile, VfsRoot};
  12 use rustc_hash::FxHashMap;
  13 use relative_path::RelativePathBuf;
  14 use parking_lot::RwLock;
  15 use failure::format_err;
  16
  17 use crate::{
  18     project_model::{ProjectWorkspace, TargetKind},
  19     Result,
  20 };
  21
  22 #[derive(Debug)]
  23 pub struct ServerWorldState {
  24     pub roots_to_scan: usize,
  25     pub root: PathBuf,
  26     pub workspaces: Arc<Vec<ProjectWorkspace>>,
  27     pub analysis_host: AnalysisHost,
  28     pub vfs: Arc<RwLock<Vfs>>,
  29 }
  30
  31 pub struct ServerWorld {
  32     pub workspaces: Arc<Vec<ProjectWorkspace>>,
  33     pub analysis: Analysis,
  34     pub vfs: Arc<RwLock<Vfs>>,
  35 }
  36
  37 impl ServerWorldState {
  38     pub fn new(root: PathBuf, workspaces: Vec<ProjectWorkspace>) -> ServerWorldState {
  39         let mut change = AnalysisChange::new();
  40
  41         let mut roots = Vec::new();
  42         roots.push(root.clone());
  43         for ws in workspaces.iter() {
  44             for pkg in ws.cargo.packages() {
  45                 roots.push(pkg.root(&ws.cargo).to_path_buf());
  46             }
  47             for krate in ws.sysroot.crates() {
  48                 roots.push(krate.root_dir(&ws.sysroot).to_path_buf())
  49             }
  50         }
  51         roots.sort();
  52         roots.dedup();
  53         let roots_to_scan = roots.len();
  54         let (mut vfs, roots) = Vfs::new(roots);
  55         for r in roots {
  56             let is_local = vfs.root2path(r).starts_with(&root);
  57             change.add_root(SourceRootId(r.0.into()), is_local);
  58         }
  59
  60         let mut crate_graph = CrateGraph::default();
  61         for ws in workspaces.iter() {
  62             // First, load std
  63             let mut sysroot_crates = FxHashMap::default();
  64             for krate in ws.sysroot.crates() {
  65                 if let Some(file_id) = vfs.load(krate.root(&ws.sysroot)) {
  66                     let file_id = FileId(file_id.0.into());
  67                     sysroot_crates.insert(krate, crate_graph.add_crate_root(file_id));
  68                 }
  69             }
  70             for from in ws.sysroot.crates() {
  71                 for to in from.deps(&ws.sysroot) {
  72                     let name = to.name(&ws.sysroot);
  73                     if let (Some(&from), Some(&to)) =
  74                         (sysroot_crates.get(&from), sysroot_crates.get(&to))
  75                     {
  76                         crate_graph.add_dep(from, name.clone(), to);
  77                     }
  78                 }
  79             }
  80
  81             let libstd = ws
  82                 .sysroot
  83                 .std()
  84                 .and_then(|it| sysroot_crates.get(&it).map(|&it| it));
  85
  86             let mut pkg_to_lib_crate = FxHashMap::default();
  87             let mut pkg_crates = FxHashMap::default();
  88             // Next, create crates for each package, target pair
  89             for pkg in ws.cargo.packages() {
  90                 let mut lib_tgt = None;
  91                 for tgt in pkg.targets(&ws.cargo) {
  92                     let root = tgt.root(&ws.cargo);
  93                     if let Some(file_id) = vfs.load(root) {
  94                         let file_id = FileId(file_id.0.into());
  95                         let crate_id = crate_graph.add_crate_root(file_id);
  96                         if tgt.kind(&ws.cargo) == TargetKind::Lib {
  97                             lib_tgt = Some(crate_id);
  98                             pkg_to_lib_crate.insert(pkg, crate_id);
  99                         }
 100                         pkg_crates
 101                             .entry(pkg)
 102                             .or_insert_with(Vec::new)
 103                             .push(crate_id);
 104                     }
 105                 }
 106
 107                 // Set deps to the std and to the lib target of the current package
 108                 for &from in pkg_crates.get(&pkg).into_iter().flatten() {
 109                     if let Some(to) = lib_tgt {
 110                         if to != from {
 111                             crate_graph.add_dep(from, pkg.name(&ws.cargo).into(), to);
 112                         }
 113                     }
 114                     if let Some(std) = libstd {
 115                         crate_graph.add_dep(from, "std".into(), std);
 116                     }
 117                 }
 118             }
 119
 120             // Now add a dep ednge from all targets of upstream to the lib
 121             // target of downstream.
 122             for pkg in ws.cargo.packages() {
 123                 for dep in pkg.dependencies(&ws.cargo) {
 124                     if let Some(&to) = pkg_to_lib_crate.get(&dep.pkg) {
 125                         for &from in pkg_crates.get(&pkg).into_iter().flatten() {
 126                             crate_graph.add_dep(from, dep.name.clone(), to);
 127                         }
 128                     }
 129                 }
 130             }
 131         }
 132         change.set_crate_graph(crate_graph);
 133
 134         let mut analysis_host = AnalysisHost::default();
 135         analysis_host.apply_change(change);
 136         ServerWorldState {
 137             roots_to_scan,
 138             root,
 139             workspaces: Arc::new(workspaces),
 140             analysis_host,
 141             vfs: Arc::new(RwLock::new(vfs)),
 142         }
 143     }
 144
 145     /// Returns a vec of libraries
 146     /// FIXME: better API here
 147     pub fn process_changes(
 148         &mut self,
 149     ) -> Vec<(SourceRootId, Vec<(FileId, RelativePathBuf, Arc<String>)>)> {
 150         let changes = self.vfs.write().commit_changes();
 151         if changes.is_empty() {
 152             return Vec::new();
 153         }
 154         let mut libs = Vec::new();
 155         let mut change = AnalysisChange::new();
 156         for c in changes {
 157             match c {
 158                 VfsChange::AddRoot { root, files } => {
 159                     let root_path = self.vfs.read().root2path(root);
 160                     if root_path.starts_with(&self.root) {
 161                         self.roots_to_scan -= 1;
 162                         for (file, path, text) in files {
 163                             change.add_file(
 164                                 SourceRootId(root.0.into()),
 165                                 FileId(file.0.into()),
 166                                 path,
 167                                 text,
 168                             );
 169                         }
 170                     } else {
 171                         let files = files
 172                             .into_iter()
 173                             .map(|(vfsfile, path, text)| (FileId(vfsfile.0.into()), path, text))
 174                             .collect();
 175                         libs.push((SourceRootId(root.0.into()), files));
 176                     }
 177                 }
 178                 VfsChange::AddFile {
 179                     root,
 180                     file,
 181                     path,
 182                     text,
 183                 } => {
 184                     change.add_file(
 185                         SourceRootId(root.0.into()),
 186                         FileId(file.0.into()),
 187                         path,
 188                         text,
 189                     );
 190                 }
 191                 VfsChange::RemoveFile { root, file, path } => {
 192                     change.remove_file(SourceRootId(root.0.into()), FileId(file.0.into()), path)
 193                 }
 194                 VfsChange::ChangeFile { file, text } => {
 195                     change.change_file(FileId(file.0.into()), text);
 196                 }
 197             }
 198         }
 199         self.analysis_host.apply_change(change);
 200         libs
 201     }
 202
 203     pub fn add_lib(&mut self, data: LibraryData) {
 204         self.roots_to_scan -= 1;
 205         let mut change = AnalysisChange::new();
 206         change.add_library(data);
 207         self.analysis_host.apply_change(change);
 208     }
 209
 210     pub fn snapshot(&self) -> ServerWorld {
 211         ServerWorld {
 212             workspaces: Arc::clone(&self.workspaces),
 213             analysis: self.analysis_host.analysis(),
 214             vfs: Arc::clone(&self.vfs),
 215         }
 216     }
 217 }
 218
 219 impl ServerWorld {
 220     pub fn analysis(&self) -> &Analysis {
 221         &self.analysis
 222     }
 223
 224     pub fn uri_to_file_id(&self, uri: &Url) -> Result<FileId> {
 225         let path = uri
 226             .to_file_path()
 227             .map_err(|()| format_err!("invalid uri: {}", uri))?;
 228         let file = self
 229             .vfs
 230             .read()
 231             .path2file(&path)
 232             .ok_or_else(|| format_err!("unknown file: {}", path.display()))?;
 233         Ok(FileId(file.0.into()))
 234     }
 235
 236     pub fn file_id_to_uri(&self, id: FileId) -> Result<Url> {
 237         let path = self.vfs.read().file2path(VfsFile(id.0.into()));
 238         let url = Url::from_file_path(&path)
 239             .map_err(|_| format_err!("can't convert path to url: {}", path.display()))?;
 240         Ok(url)
 241     }
 242
 243     pub fn path_to_uri(&self, root: SourceRootId, path: &RelativePathBuf) -> Result<Url> {
 244         let base = self.vfs.read().root2path(VfsRoot(root.0.into()));
 245         let path = path.to_path(base);
 246         let url = Url::from_file_path(&path)
 247             .map_err(|_| format_err!("can't convert path to url: {}", path.display()))?;
 248         Ok(url)
 249     }
 250 }