1 //! FIXME: write short doc here
8 fs::{read_dir, File, ReadDir},
10 path::{Path, PathBuf},
14 use anyhow::{bail, Context, Result};
15 use ra_cfg::CfgOptions;
16 use ra_db::{CrateGraph, CrateName, Edition, Env, ExternSource, ExternSourceId, FileId};
17 use rustc_hash::FxHashMap;
18 use serde_json::from_reader;
21 cargo_workspace::{CargoConfig, CargoWorkspace, Package, Target, TargetKind},
22 json_project::JsonProject,
25 pub use ra_proc_macro::ProcMacroClient;
27 #[derive(Debug, Clone)]
28 pub enum ProjectWorkspace {
29 /// Project workspace was discovered by running `cargo metadata` and `rustc --print sysroot`.
30 Cargo { cargo: CargoWorkspace, sysroot: Sysroot },
31 /// Project workspace was manually specified using a `rust-project.json` file.
32 Json { project: JsonProject },
35 /// `PackageRoot` describes a package root folder.
36 /// Which may be an external dependency, or a member of
37 /// the current workspace.
39 pub struct PackageRoot {
40 /// Path to the root folder
42 /// Is a member of the current workspace
46 pub fn new_member(path: PathBuf) -> PackageRoot {
47 Self { path, is_member: true }
49 pub fn new_non_member(path: PathBuf) -> PackageRoot {
50 Self { path, is_member: false }
52 pub fn path(&self) -> &Path {
55 pub fn is_member(&self) -> bool {
60 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
61 pub enum ProjectRoot {
67 pub fn from_manifest_file(path: PathBuf) -> Result<ProjectRoot> {
68 if path.ends_with("rust-project.json") {
69 return Ok(ProjectRoot::ProjectJson(path));
71 if path.ends_with("Cargo.toml") {
72 return Ok(ProjectRoot::CargoToml(path));
74 bail!("project root must point to Cargo.toml or rust-project.json: {}", path.display())
77 pub fn discover_single(path: &Path) -> Result<ProjectRoot> {
78 let mut candidates = ProjectRoot::discover(path)?;
79 let res = match candidates.pop() {
80 None => bail!("no projects"),
84 if !candidates.is_empty() {
85 bail!("more than one project")
90 pub fn discover(path: &Path) -> io::Result<Vec<ProjectRoot>> {
91 if let Some(project_json) = find_rust_project_json(path) {
92 return Ok(vec![ProjectRoot::ProjectJson(project_json)]);
94 return find_cargo_toml(path)
95 .map(|paths| paths.into_iter().map(ProjectRoot::CargoToml).collect());
97 fn find_rust_project_json(path: &Path) -> Option<PathBuf> {
98 if path.ends_with("rust-project.json") {
99 return Some(path.to_path_buf());
102 let mut curr = Some(path);
103 while let Some(path) = curr {
104 let candidate = path.join("rust-project.json");
105 if candidate.exists() {
106 return Some(candidate);
108 curr = path.parent();
114 fn find_cargo_toml(path: &Path) -> io::Result<Vec<PathBuf>> {
115 if path.ends_with("Cargo.toml") {
116 return Ok(vec![path.to_path_buf()]);
119 if let Some(p) = find_cargo_toml_in_parent_dir(path) {
123 let entities = read_dir(path)?;
124 Ok(find_cargo_toml_in_child_dir(entities))
127 fn find_cargo_toml_in_parent_dir(path: &Path) -> Option<PathBuf> {
128 let mut curr = Some(path);
129 while let Some(path) = curr {
130 let candidate = path.join("Cargo.toml");
131 if candidate.exists() {
132 return Some(candidate);
134 curr = path.parent();
140 fn find_cargo_toml_in_child_dir(entities: ReadDir) -> Vec<PathBuf> {
141 // Only one level down to avoid cycles the easy way and stop a runaway scan with large projects
142 let mut valid_canditates = vec![];
143 for entity in entities.filter_map(Result::ok) {
144 let candidate = entity.path().join("Cargo.toml");
145 if candidate.exists() {
146 valid_canditates.push(candidate)
154 impl ProjectWorkspace {
157 cargo_features: &CargoConfig,
159 ) -> Result<ProjectWorkspace> {
160 let res = match root {
161 ProjectRoot::ProjectJson(project_json) => {
162 let file = File::open(&project_json).with_context(|| {
163 format!("Failed to open json file {}", project_json.display())
165 let reader = BufReader::new(file);
166 ProjectWorkspace::Json {
167 project: from_reader(reader).with_context(|| {
168 format!("Failed to deserialize json file {}", project_json.display())
172 ProjectRoot::CargoToml(cargo_toml) => {
173 let cargo = CargoWorkspace::from_cargo_metadata(&cargo_toml, cargo_features)
176 "Failed to read Cargo metadata from Cargo.toml file {}",
180 let sysroot = if with_sysroot {
181 Sysroot::discover(&cargo_toml).with_context(|| {
183 "Failed to find sysroot for Cargo.toml file {}. Is rust-src installed?",
190 ProjectWorkspace::Cargo { cargo, sysroot }
197 /// Returns the roots for the current `ProjectWorkspace`
198 /// The return type contains the path and whether or not
199 /// the root is a member of the current workspace
200 pub fn to_roots(&self) -> Vec<PackageRoot> {
202 ProjectWorkspace::Json { project } => {
203 project.roots.iter().map(|r| PackageRoot::new_member(r.path.clone())).collect()
205 ProjectWorkspace::Cargo { cargo, sysroot } => cargo
207 .map(|pkg| PackageRoot {
208 path: cargo[pkg].root().to_path_buf(),
209 is_member: cargo[pkg].is_member,
211 .chain(sysroot.crates().map(|krate| {
212 PackageRoot::new_non_member(sysroot[krate].root_dir().to_path_buf())
218 pub fn out_dirs(&self) -> Vec<PathBuf> {
220 ProjectWorkspace::Json { project } => {
221 project.crates.iter().filter_map(|krate| krate.out_dir.as_ref()).cloned().collect()
223 ProjectWorkspace::Cargo { cargo, sysroot: _ } => {
224 cargo.packages().filter_map(|pkg| cargo[pkg].out_dir.as_ref()).cloned().collect()
229 pub fn proc_macro_dylib_paths(&self) -> Vec<PathBuf> {
231 ProjectWorkspace::Json { project } => project
234 .filter_map(|krate| krate.proc_macro_dylib_path.as_ref())
237 ProjectWorkspace::Cargo { cargo, sysroot: _sysroot } => cargo
239 .filter_map(|pkg| cargo[pkg].proc_macro_dylib_path.as_ref())
245 pub fn n_packages(&self) -> usize {
247 ProjectWorkspace::Json { project } => project.crates.len(),
248 ProjectWorkspace::Cargo { cargo, sysroot } => {
249 cargo.packages().len() + sysroot.crates().len()
254 pub fn to_crate_graph(
256 default_cfg_options: &CfgOptions,
257 extern_source_roots: &FxHashMap<PathBuf, ExternSourceId>,
258 proc_macro_client: &ProcMacroClient,
259 load: &mut dyn FnMut(&Path) -> Option<FileId>,
261 let mut crate_graph = CrateGraph::default();
263 ProjectWorkspace::Json { project } => {
264 let crates: FxHashMap<_, _> = project
268 .filter_map(|(seq_index, krate)| {
269 let file_id = load(&krate.root_module)?;
270 let edition = match krate.edition {
271 json_project::Edition::Edition2015 => Edition::Edition2015,
272 json_project::Edition::Edition2018 => Edition::Edition2018,
275 let mut opts = default_cfg_options.clone();
276 for cfg in &krate.cfg {
277 match cfg.find('=') {
278 None => opts.insert_atom(cfg.into()),
280 let key = &cfg[..pos];
281 let value = cfg[pos + 1..].trim_matches('"');
282 opts.insert_key_value(key.into(), value.into());
286 for name in &krate.atom_cfgs {
287 opts.insert_atom(name.into());
289 for (key, value) in &krate.key_value_cfgs {
290 opts.insert_key_value(key.into(), value.into());
295 let mut env = Env::default();
296 let mut extern_source = ExternSource::default();
297 if let Some(out_dir) = &krate.out_dir {
298 // NOTE: cargo and rustc seem to hide non-UTF-8 strings from env! and option_env!()
299 if let Some(out_dir) = out_dir.to_str().map(|s| s.to_owned()) {
300 env.set("OUT_DIR", out_dir);
302 if let Some(&extern_source_id) = extern_source_roots.get(out_dir) {
303 extern_source.set_extern_path(&out_dir, extern_source_id);
306 let proc_macro = krate
307 .proc_macro_dylib_path
309 .map(|it| proc_macro_client.by_dylib_path(&it));
310 // FIXME: No crate name in json definition such that we cannot add OUT_DIR to env
312 json_project::CrateId(seq_index),
313 crate_graph.add_crate_root(
316 // FIXME json definitions can store the crate name
321 proc_macro.unwrap_or_default(),
327 for (id, krate) in project.crates.iter().enumerate() {
328 for dep in &krate.deps {
329 let from_crate_id = json_project::CrateId(id);
330 let to_crate_id = dep.krate;
331 if let (Some(&from), Some(&to)) =
332 (crates.get(&from_crate_id), crates.get(&to_crate_id))
335 .add_dep(from, CrateName::new(&dep.name).unwrap(), to)
339 "cyclic dependency {:?} -> {:?}",
348 ProjectWorkspace::Cargo { cargo, sysroot } => {
349 let sysroot_crates: FxHashMap<_, _> = sysroot
351 .filter_map(|krate| {
352 let file_id = load(&sysroot[krate].root)?;
354 // Crates from sysroot have `cfg(test)` disabled
356 let mut opts = default_cfg_options.clone();
357 opts.remove_atom("test");
361 let env = Env::default();
362 let extern_source = ExternSource::default();
363 let proc_macro = vec![];
364 let crate_name = CrateName::new(&sysroot[krate].name)
365 .expect("Sysroot crate names should not contain dashes");
367 let crate_id = crate_graph.add_crate_root(
369 Edition::Edition2018,
376 Some((krate, crate_id))
380 for from in sysroot.crates() {
381 for &to in sysroot[from].deps.iter() {
382 let name = &sysroot[to].name;
383 if let (Some(&from), Some(&to)) =
384 (sysroot_crates.get(&from), sysroot_crates.get(&to))
386 if crate_graph.add_dep(from, CrateName::new(name).unwrap(), to).is_err()
388 log::error!("cyclic dependency between sysroot crates")
394 let libcore = sysroot.core().and_then(|it| sysroot_crates.get(&it).copied());
395 let liballoc = sysroot.alloc().and_then(|it| sysroot_crates.get(&it).copied());
396 let libstd = sysroot.std().and_then(|it| sysroot_crates.get(&it).copied());
398 sysroot.proc_macro().and_then(|it| sysroot_crates.get(&it).copied());
400 let mut pkg_to_lib_crate = FxHashMap::default();
401 let mut pkg_crates = FxHashMap::default();
402 // Next, create crates for each package, target pair
403 for pkg in cargo.packages() {
404 let mut lib_tgt = None;
405 for &tgt in cargo[pkg].targets.iter() {
406 let root = cargo[tgt].root.as_path();
407 if let Some(file_id) = load(root) {
408 let edition = cargo[pkg].edition;
410 let mut opts = default_cfg_options.clone();
411 opts.insert_features(cargo[pkg].features.iter().map(Into::into));
414 let mut env = Env::default();
415 let mut extern_source = ExternSource::default();
416 if let Some(out_dir) = &cargo[pkg].out_dir {
417 // NOTE: cargo and rustc seem to hide non-UTF-8 strings from env! and option_env!()
418 if let Some(out_dir) = out_dir.to_str().map(|s| s.to_owned()) {
419 env.set("OUT_DIR", out_dir);
421 if let Some(&extern_source_id) = extern_source_roots.get(out_dir) {
422 extern_source.set_extern_path(&out_dir, extern_source_id);
425 let proc_macro = cargo[pkg]
426 .proc_macro_dylib_path
428 .map(|it| proc_macro_client.by_dylib_path(&it))
429 .unwrap_or_default();
431 let crate_id = crate_graph.add_crate_root(
434 Some(CrateName::normalize_dashes(&cargo[pkg].name)),
440 if cargo[tgt].kind == TargetKind::Lib {
441 lib_tgt = Some((crate_id, cargo[tgt].name.clone()));
442 pkg_to_lib_crate.insert(pkg, crate_id);
444 if cargo[tgt].is_proc_macro {
445 if let Some(proc_macro) = libproc_macro {
449 CrateName::new("proc_macro").unwrap(),
455 "cyclic dependency on proc_macro for {}",
462 pkg_crates.entry(pkg).or_insert_with(Vec::new).push(crate_id);
466 // Set deps to the core, std and to the lib target of the current package
467 for &from in pkg_crates.get(&pkg).into_iter().flatten() {
468 if let Some((to, name)) = lib_tgt.clone() {
473 // For root projects with dashes in their name,
474 // cargo metadata does not do any normalization,
475 // so we do it ourselves currently
476 CrateName::normalize_dashes(&name),
483 "cyclic dependency between targets of {}",
489 // core is added as a dependency before std in order to
490 // mimic rustcs dependency order
491 if let Some(core) = libcore {
493 .add_dep(from, CrateName::new("core").unwrap(), core)
496 log::error!("cyclic dependency on core for {}", &cargo[pkg].name)
499 if let Some(alloc) = liballoc {
501 .add_dep(from, CrateName::new("alloc").unwrap(), alloc)
504 log::error!("cyclic dependency on alloc for {}", &cargo[pkg].name)
507 if let Some(std) = libstd {
509 .add_dep(from, CrateName::new("std").unwrap(), std)
512 log::error!("cyclic dependency on std for {}", &cargo[pkg].name)
518 // Now add a dep edge from all targets of upstream to the lib
519 // target of downstream.
520 for pkg in cargo.packages() {
521 for dep in cargo[pkg].dependencies.iter() {
522 if let Some(&to) = pkg_to_lib_crate.get(&dep.pkg) {
523 for &from in pkg_crates.get(&pkg).into_iter().flatten() {
525 .add_dep(from, CrateName::new(&dep.name).unwrap(), to)
529 "cyclic dependency {} -> {}",
543 pub fn workspace_root_for(&self, path: &Path) -> Option<&Path> {
545 ProjectWorkspace::Cargo { cargo, .. } => {
546 Some(cargo.workspace_root()).filter(|root| path.starts_with(root))
548 ProjectWorkspace::Json { project: JsonProject { roots, .. } } => roots
550 .find(|root| path.starts_with(&root.path))
551 .map(|root| root.path.as_ref()),
556 pub fn get_rustc_cfg_options() -> CfgOptions {
557 let mut cfg_options = CfgOptions::default();
559 // Some nightly-only cfgs, which are required for stdlib
561 cfg_options.insert_atom("target_thread_local".into());
562 for &target_has_atomic in ["8", "16", "32", "64", "cas", "ptr"].iter() {
563 cfg_options.insert_key_value("target_has_atomic".into(), target_has_atomic.into());
565 .insert_key_value("target_has_atomic_load_store".into(), target_has_atomic.into());
569 match (|| -> Result<String> {
570 // `cfg(test)` and `cfg(debug_assertion)` are handled outside, so we suppress them here.
571 let output = Command::new("rustc")
572 .args(&["--print", "cfg", "-O"])
574 .context("Failed to get output from rustc --print cfg -O")?;
575 if !output.status.success() {
577 "rustc --print cfg -O exited with exit code ({})",
581 .map_or(String::from("no exit code"), |code| format!("{}", code))
584 Ok(String::from_utf8(output.stdout)?)
587 for line in rustc_cfgs.lines() {
588 match line.find('=') {
589 None => cfg_options.insert_atom(line.into()),
591 let key = &line[..pos];
592 let value = line[pos + 1..].trim_matches('"');
593 cfg_options.insert_key_value(key.into(), value.into());
598 Err(e) => log::error!("failed to get rustc cfgs: {}", e),