1 //! Handles lowering of build-system specific workspace information (`cargo
2 //! metadata` or `rust-project.json`) into representation stored in the salsa
3 //! database -- `CrateGraph`.
5 use std::{collections::VecDeque, fmt, fs, process::Command};
7 use anyhow::{format_err, Context, Result};
9 CrateDisplayName, CrateGraph, CrateId, CrateName, CrateOrigin, Dependency, Edition, Env,
12 use cfg::{CfgDiff, CfgOptions};
13 use paths::{AbsPath, AbsPathBuf};
14 use rustc_hash::{FxHashMap, FxHashSet};
18 build_scripts::BuildScriptOutput,
19 cargo_workspace::{DepKind, PackageData, RustcSource},
22 sysroot::SysrootCrate,
23 utf8_stdout, CargoConfig, CargoWorkspace, ManifestPath, ProjectJson, ProjectManifest, Sysroot,
24 TargetKind, WorkspaceBuildScripts,
27 /// A set of cfg-overrides per crate.
29 /// `Wildcard(..)` is useful e.g. disabling `#[cfg(test)]` on all crates,
30 /// without having to first obtain a list of all crates.
31 #[derive(Debug, Clone, Eq, PartialEq)]
32 pub enum CfgOverrides {
33 /// A single global set of overrides matching all crates.
35 /// A set of overrides matching specific crates.
36 Selective(FxHashMap<String, CfgDiff>),
39 impl Default for CfgOverrides {
40 fn default() -> Self {
41 Self::Selective(FxHashMap::default())
46 pub fn len(&self) -> usize {
48 CfgOverrides::Wildcard(_) => 1,
49 CfgOverrides::Selective(hash_map) => hash_map.len(),
54 /// `PackageRoot` describes a package root folder.
55 /// Which may be an external dependency, or a member of
56 /// the current workspace.
57 #[derive(Debug, Clone, Eq, PartialEq, Hash)]
58 pub struct PackageRoot {
59 /// Is from the local filesystem and may be edited
61 pub include: Vec<AbsPathBuf>,
62 pub exclude: Vec<AbsPathBuf>,
65 #[derive(Clone, Eq, PartialEq)]
66 pub enum ProjectWorkspace {
67 /// Project workspace was discovered by running `cargo metadata` and `rustc --print sysroot`.
69 cargo: CargoWorkspace,
70 build_scripts: WorkspaceBuildScripts,
71 sysroot: Option<Sysroot>,
72 rustc: Option<CargoWorkspace>,
73 /// Holds cfg flags for the current target. We get those by running
74 /// `rustc --print cfg`.
76 /// FIXME: make this a per-crate map, as, eg, build.rs might have a
78 rustc_cfg: Vec<CfgFlag>,
79 cfg_overrides: CfgOverrides,
81 /// Project workspace was manually specified using a `rust-project.json` file.
82 Json { project: ProjectJson, sysroot: Option<Sysroot>, rustc_cfg: Vec<CfgFlag> },
84 // FIXME: The primary limitation of this approach is that the set of detached files needs to be fixed at the beginning.
85 // That's not the end user experience we should strive for.
86 // Ideally, you should be able to just open a random detached file in existing cargo projects, and get the basic features working.
87 // That needs some changes on the salsa-level though.
88 // In particular, we should split the unified CrateGraph (which currently has maximal durability) into proper crate graph, and a set of ad hoc roots (with minimal durability).
89 // Then, we need to hide the graph behind the queries such that most queries look only at the proper crate graph, and fall back to ad hoc roots only if there's no results.
90 // After this, we should be able to tweak the logic in reload.rs to add newly opened files, which don't belong to any existing crates, to the set of the detached files.
92 /// Project with a set of disjoint files, not belonging to any particular workspace.
93 /// Backed by basic sysroot crates for basic completion and highlighting.
94 DetachedFiles { files: Vec<AbsPathBuf>, sysroot: Sysroot, rustc_cfg: Vec<CfgFlag> },
97 impl fmt::Debug for ProjectWorkspace {
98 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
99 // Make sure this isn't too verbose.
101 ProjectWorkspace::Cargo {
109 .debug_struct("Cargo")
110 .field("root", &cargo.workspace_root().file_name())
111 .field("n_packages", &cargo.packages().len())
112 .field("sysroot", &sysroot.is_some())
114 "n_rustc_compiler_crates",
115 &rustc.as_ref().map_or(0, |rc| rc.packages().len()),
117 .field("n_rustc_cfg", &rustc_cfg.len())
118 .field("n_cfg_overrides", &cfg_overrides.len())
120 ProjectWorkspace::Json { project, sysroot, rustc_cfg } => {
121 let mut debug_struct = f.debug_struct("Json");
122 debug_struct.field("n_crates", &project.n_crates());
123 if let Some(sysroot) = sysroot {
124 debug_struct.field("n_sysroot_crates", &sysroot.crates().len());
126 debug_struct.field("n_rustc_cfg", &rustc_cfg.len());
127 debug_struct.finish()
129 ProjectWorkspace::DetachedFiles { files, sysroot, rustc_cfg } => f
130 .debug_struct("DetachedFiles")
131 .field("n_files", &files.len())
132 .field("n_sysroot_crates", &sysroot.crates().len())
133 .field("n_rustc_cfg", &rustc_cfg.len())
139 impl ProjectWorkspace {
141 manifest: ProjectManifest,
142 config: &CargoConfig,
143 progress: &dyn Fn(String),
144 ) -> Result<ProjectWorkspace> {
145 let res = match manifest {
146 ProjectManifest::ProjectJson(project_json) => {
147 let file = fs::read_to_string(&project_json).with_context(|| {
148 format!("Failed to read json file {}", project_json.display())
150 let data = serde_json::from_str(&file).with_context(|| {
151 format!("Failed to deserialize json file {}", project_json.display())
153 let project_location = project_json.parent().to_path_buf();
154 let project_json = ProjectJson::new(&project_location, data);
155 ProjectWorkspace::load_inline(project_json, config.target.as_deref())?
157 ProjectManifest::CargoToml(cargo_toml) => {
158 let cargo_version = utf8_stdout({
159 let mut cmd = Command::new(toolchain::cargo());
160 cmd.arg("--version");
164 let meta = CargoWorkspace::fetch_metadata(
172 "Failed to read Cargo metadata from Cargo.toml file {}, {}",
173 cargo_toml.display(),
177 let cargo = CargoWorkspace::new(meta);
179 let sysroot = if config.no_sysroot {
182 Some(Sysroot::discover(cargo_toml.parent()).with_context(|| {
184 "Failed to find sysroot for Cargo.toml file {}. Is rust-src installed?",
190 let rustc_dir = match &config.rustc_source {
191 Some(RustcSource::Path(path)) => ManifestPath::try_from(path.clone()).ok(),
192 Some(RustcSource::Discover) => Sysroot::discover_rustc(&cargo_toml),
196 let rustc = match rustc_dir {
197 Some(rustc_dir) => Some({
198 let meta = CargoWorkspace::fetch_metadata(
205 "Failed to read Cargo metadata for Rust sources".to_string()
207 CargoWorkspace::new(meta)
212 let rustc_cfg = rustc_cfg::get(Some(&cargo_toml), config.target.as_deref());
214 let cfg_overrides = config.cfg_overrides();
215 ProjectWorkspace::Cargo {
217 build_scripts: WorkspaceBuildScripts::default(),
230 project_json: ProjectJson,
231 target: Option<&str>,
232 ) -> Result<ProjectWorkspace> {
233 let sysroot = match &project_json.sysroot_src {
234 Some(path) => Some(Sysroot::load(path.clone())?),
237 let rustc_cfg = rustc_cfg::get(None, target);
238 Ok(ProjectWorkspace::Json { project: project_json, sysroot, rustc_cfg })
241 pub fn load_detached_files(detached_files: Vec<AbsPathBuf>) -> Result<ProjectWorkspace> {
242 let sysroot = Sysroot::discover(
245 .and_then(|it| it.parent())
246 .ok_or_else(|| format_err!("No detached files to load"))?,
248 let rustc_cfg = rustc_cfg::get(None, None);
249 Ok(ProjectWorkspace::DetachedFiles { files: detached_files, sysroot, rustc_cfg })
252 pub fn run_build_scripts(
254 config: &CargoConfig,
255 progress: &dyn Fn(String),
256 ) -> Result<WorkspaceBuildScripts> {
258 ProjectWorkspace::Cargo { cargo, .. } => {
259 WorkspaceBuildScripts::run(config, cargo, progress)
261 ProjectWorkspace::Json { .. } | ProjectWorkspace::DetachedFiles { .. } => {
262 Ok(WorkspaceBuildScripts::default())
267 pub fn set_build_scripts(&mut self, bs: WorkspaceBuildScripts) {
269 ProjectWorkspace::Cargo { build_scripts, .. } => *build_scripts = bs,
271 always!(bs == WorkspaceBuildScripts::default());
276 /// Returns the roots for the current `ProjectWorkspace`
277 /// The return type contains the path and whether or not
278 /// the root is a member of the current workspace
279 pub fn to_roots(&self) -> Vec<PackageRoot> {
281 ProjectWorkspace::Json { project, sysroot, rustc_cfg: _ } => project
283 .map(|(_, krate)| PackageRoot {
284 is_local: krate.is_workspace_member,
285 include: krate.include.clone(),
286 exclude: krate.exclude.clone(),
288 .collect::<FxHashSet<_>>()
290 .chain(sysroot.as_ref().into_iter().flat_map(|sysroot| {
291 sysroot.crates().map(move |krate| PackageRoot {
293 include: vec![sysroot[krate].root.parent().to_path_buf()],
297 .collect::<Vec<_>>(),
298 ProjectWorkspace::Cargo {
309 let is_local = cargo[pkg].is_local;
310 let pkg_root = cargo[pkg].manifest.parent().to_path_buf();
312 let mut include = vec![pkg_root.clone()];
314 build_scripts.outputs.get(pkg).and_then(|it| it.out_dir.clone()),
317 // In case target's path is manually set in Cargo.toml to be
318 // outside the package root, add its parent as an extra include.
319 // An example of this situation would look like this:
323 // path = "../../src/lib.rs"
325 let extra_targets = cargo[pkg]
328 .filter(|&&tgt| cargo[tgt].kind == TargetKind::Lib)
329 .filter_map(|&tgt| cargo[tgt].root.parent())
330 .map(|tgt| tgt.normalize().to_path_buf())
331 .filter(|path| !path.starts_with(&pkg_root));
332 include.extend(extra_targets);
334 let mut exclude = vec![pkg_root.join(".git")];
336 exclude.push(pkg_root.join("target"));
338 exclude.push(pkg_root.join("tests"));
339 exclude.push(pkg_root.join("examples"));
340 exclude.push(pkg_root.join("benches"));
342 PackageRoot { is_local, include, exclude }
344 .chain(sysroot.iter().map(|sysroot| PackageRoot {
346 include: vec![sysroot.root().to_path_buf()],
349 .chain(rustc.iter().flat_map(|rustc| {
350 rustc.packages().map(move |krate| PackageRoot {
352 include: vec![rustc[krate].manifest.parent().to_path_buf()],
358 ProjectWorkspace::DetachedFiles { files, sysroot, .. } => files
360 .map(|detached_file| PackageRoot {
362 include: vec![detached_file.clone()],
365 .chain(sysroot.crates().map(|krate| PackageRoot {
367 include: vec![sysroot[krate].root.parent().to_path_buf()],
374 pub fn n_packages(&self) -> usize {
376 ProjectWorkspace::Json { project, .. } => project.n_crates(),
377 ProjectWorkspace::Cargo { cargo, sysroot, rustc, .. } => {
378 let rustc_package_len = rustc.as_ref().map_or(0, |it| it.packages().len());
379 let sysroot_package_len = sysroot.as_ref().map_or(0, |it| it.crates().len());
380 cargo.packages().len() + sysroot_package_len + rustc_package_len
382 ProjectWorkspace::DetachedFiles { sysroot, files, .. } => {
383 sysroot.crates().len() + files.len()
388 pub fn to_crate_graph(
390 load_proc_macro: &mut dyn FnMut(&AbsPath) -> Vec<ProcMacro>,
391 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
393 let _p = profile::span("ProjectWorkspace::to_crate_graph");
395 let mut crate_graph = match self {
396 ProjectWorkspace::Json { project, sysroot, rustc_cfg } => project_json_to_crate_graph(
403 ProjectWorkspace::Cargo {
410 } => cargo_to_crate_graph(
420 ProjectWorkspace::DetachedFiles { files, sysroot, rustc_cfg } => {
421 detached_files_to_crate_graph(rustc_cfg.clone(), load, files, sysroot)
424 if crate_graph.patch_cfg_if() {
425 tracing::debug!("Patched std to depend on cfg-if")
427 tracing::debug!("Did not patch std to depend on cfg-if")
433 fn project_json_to_crate_graph(
434 rustc_cfg: Vec<CfgFlag>,
435 load_proc_macro: &mut dyn FnMut(&AbsPath) -> Vec<ProcMacro>,
436 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
437 project: &ProjectJson,
438 sysroot: &Option<Sysroot>,
440 let mut crate_graph = CrateGraph::default();
441 let sysroot_deps = sysroot
443 .map(|sysroot| sysroot_to_crate_graph(&mut crate_graph, sysroot, rustc_cfg.clone(), load));
445 let mut cfg_cache: FxHashMap<&str, Vec<CfgFlag>> = FxHashMap::default();
446 let crates: FxHashMap<CrateId, CrateId> = project
448 .filter_map(|(crate_id, krate)| {
449 let file_path = &krate.root_module;
450 let file_id = load(file_path)?;
451 Some((crate_id, krate, file_id))
453 .map(|(crate_id, krate, file_id)| {
454 let env = krate.env.clone().into_iter().collect();
455 let proc_macro = krate.proc_macro_dylib_path.clone().map(|it| load_proc_macro(&it));
457 let target_cfgs = match krate.target.as_deref() {
459 cfg_cache.entry(target).or_insert_with(|| rustc_cfg::get(None, Some(target)))
464 let mut cfg_options = CfgOptions::default();
465 cfg_options.extend(target_cfgs.iter().chain(krate.cfg.iter()).cloned());
468 crate_graph.add_crate_root(
471 krate.display_name.clone(),
472 krate.version.clone(),
476 proc_macro.unwrap_or_default(),
477 if krate.display_name.is_some() {
478 CrateOrigin::CratesIo { repo: krate.repository.clone() }
487 for (from, krate) in project.crates() {
488 if let Some(&from) = crates.get(&from) {
489 if let Some((public_deps, libproc_macro)) = &sysroot_deps {
490 public_deps.add(from, &mut crate_graph);
491 if krate.is_proc_macro {
492 if let Some(proc_macro) = libproc_macro {
496 CrateName::new("proc_macro").unwrap(),
503 for dep in &krate.deps {
504 if let Some(&to) = crates.get(&dep.crate_id) {
505 add_dep(&mut crate_graph, from, dep.name.clone(), to)
513 fn cargo_to_crate_graph(
514 rustc_cfg: Vec<CfgFlag>,
515 override_cfg: &CfgOverrides,
516 load_proc_macro: &mut dyn FnMut(&AbsPath) -> Vec<ProcMacro>,
517 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
518 cargo: &CargoWorkspace,
519 build_scripts: &WorkspaceBuildScripts,
520 sysroot: Option<&Sysroot>,
521 rustc: &Option<CargoWorkspace>,
523 let _p = profile::span("cargo_to_crate_graph");
524 let mut crate_graph = CrateGraph::default();
525 let (public_deps, libproc_macro) = match sysroot {
526 Some(sysroot) => sysroot_to_crate_graph(&mut crate_graph, sysroot, rustc_cfg.clone(), load),
527 None => (SysrootPublicDeps::default(), None),
530 let mut cfg_options = CfgOptions::default();
531 cfg_options.extend(rustc_cfg);
533 let mut pkg_to_lib_crate = FxHashMap::default();
535 // Add test cfg for non-sysroot crates
536 cfg_options.insert_atom("test".into());
537 cfg_options.insert_atom("debug_assertions".into());
539 let mut pkg_crates = FxHashMap::default();
540 // Does any crate signal to rust-analyzer that they need the rustc_private crates?
541 let mut has_private = false;
542 // Next, create crates for each package, target pair
543 for pkg in cargo.packages() {
544 let mut cfg_options = &cfg_options;
545 let mut replaced_cfg_options;
547 let overrides = match override_cfg {
548 CfgOverrides::Wildcard(cfg_diff) => Some(cfg_diff),
549 CfgOverrides::Selective(cfg_overrides) => cfg_overrides.get(&cargo[pkg].name),
552 if let Some(overrides) = overrides {
553 // FIXME: this is sort of a hack to deal with #![cfg(not(test))] vanishing such as seen
554 // in ed25519_dalek (#7243), and libcore (#9203) (although you only hit that one while
555 // working on rust-lang/rust as that's the only time it appears outside sysroot).
557 // A more ideal solution might be to reanalyze crates based on where the cursor is and
558 // figure out the set of cfgs that would have to apply to make it active.
560 replaced_cfg_options = cfg_options.clone();
561 replaced_cfg_options.apply_diff(overrides.clone());
562 cfg_options = &replaced_cfg_options;
565 has_private |= cargo[pkg].metadata.rustc_private;
566 let mut lib_tgt = None;
567 for &tgt in cargo[pkg].targets.iter() {
568 if let Some(file_id) = load(&cargo[tgt].root) {
569 let crate_id = add_target_crate_root(
572 build_scripts.outputs.get(pkg),
578 if cargo[tgt].kind == TargetKind::Lib {
579 lib_tgt = Some((crate_id, cargo[tgt].name.clone()));
580 pkg_to_lib_crate.insert(pkg, crate_id);
582 if let Some(proc_macro) = libproc_macro {
583 add_dep_with_prelude(
586 CrateName::new("proc_macro").unwrap(),
588 cargo[tgt].is_proc_macro,
592 pkg_crates.entry(pkg).or_insert_with(Vec::new).push((crate_id, cargo[tgt].kind));
596 // Set deps to the core, std and to the lib target of the current package
597 for (from, kind) in pkg_crates.get(&pkg).into_iter().flatten() {
598 // Add sysroot deps first so that a lib target named `core` etc. can overwrite them.
599 public_deps.add(*from, &mut crate_graph);
601 if let Some((to, name)) = lib_tgt.clone() {
602 if to != *from && *kind != TargetKind::BuildScript {
603 // (build script can not depend on its library target)
605 // For root projects with dashes in their name,
606 // cargo metadata does not do any normalization,
607 // so we do it ourselves currently
608 let name = CrateName::normalize_dashes(&name);
609 add_dep(&mut crate_graph, *from, name, to);
615 // Now add a dep edge from all targets of upstream to the lib
616 // target of downstream.
617 for pkg in cargo.packages() {
618 for dep in cargo[pkg].dependencies.iter() {
619 let name = CrateName::new(&dep.name).unwrap();
620 if let Some(&to) = pkg_to_lib_crate.get(&dep.pkg) {
621 for (from, kind) in pkg_crates.get(&pkg).into_iter().flatten() {
622 if dep.kind == DepKind::Build && *kind != TargetKind::BuildScript {
623 // Only build scripts may depend on build dependencies.
626 if dep.kind != DepKind::Build && *kind == TargetKind::BuildScript {
627 // Build scripts may only depend on build dependencies.
631 add_dep(&mut crate_graph, *from, name.clone(), to)
638 // If the user provided a path to rustc sources, we add all the rustc_private crates
639 // and create dependencies on them for the crates which opt-in to that
640 if let Some(rustc_workspace) = rustc {
647 &mut pkg_to_lib_crate,
657 fn detached_files_to_crate_graph(
658 rustc_cfg: Vec<CfgFlag>,
659 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
660 detached_files: &[AbsPathBuf],
663 let _p = profile::span("detached_files_to_crate_graph");
664 let mut crate_graph = CrateGraph::default();
665 let (public_deps, _libproc_macro) =
666 sysroot_to_crate_graph(&mut crate_graph, sysroot, rustc_cfg.clone(), load);
668 let mut cfg_options = CfgOptions::default();
669 cfg_options.extend(rustc_cfg);
671 for detached_file in detached_files {
672 let file_id = match load(detached_file) {
673 Some(file_id) => file_id,
675 tracing::error!("Failed to load detached file {:?}", detached_file);
679 let display_name = detached_file
681 .and_then(|os_str| os_str.to_str())
682 .map(|file_stem| CrateDisplayName::from_canonical_name(file_stem.to_string()));
683 let detached_file_crate = crate_graph.add_crate_root(
692 CrateOrigin::Unknown,
695 public_deps.add(detached_file_crate, &mut crate_graph);
700 fn handle_rustc_crates(
701 rustc_workspace: &CargoWorkspace,
702 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
703 crate_graph: &mut CrateGraph,
704 cfg_options: &CfgOptions,
705 load_proc_macro: &mut dyn FnMut(&AbsPath) -> Vec<ProcMacro>,
706 pkg_to_lib_crate: &mut FxHashMap<la_arena::Idx<crate::PackageData>, CrateId>,
707 public_deps: &SysrootPublicDeps,
708 cargo: &CargoWorkspace,
709 pkg_crates: &FxHashMap<la_arena::Idx<crate::PackageData>, Vec<(CrateId, TargetKind)>>,
711 let mut rustc_pkg_crates = FxHashMap::default();
712 // The root package of the rustc-dev component is rustc_driver, so we match that
714 rustc_workspace.packages().find(|package| rustc_workspace[*package].name == "rustc_driver");
715 // The rustc workspace might be incomplete (such as if rustc-dev is not
716 // installed for the current toolchain) and `rustcSource` is set to discover.
717 if let Some(root_pkg) = root_pkg {
718 // Iterate through every crate in the dependency subtree of rustc_driver using BFS
719 let mut queue = VecDeque::new();
720 queue.push_back(root_pkg);
721 while let Some(pkg) = queue.pop_front() {
722 // Don't duplicate packages if they are dependended on a diamond pattern
723 // N.B. if this line is ommitted, we try to analyse over 4_800_000 crates
724 // which is not ideal
725 if rustc_pkg_crates.contains_key(&pkg) {
728 for dep in &rustc_workspace[pkg].dependencies {
729 queue.push_back(dep.pkg);
731 for &tgt in rustc_workspace[pkg].targets.iter() {
732 if rustc_workspace[tgt].kind != TargetKind::Lib {
735 if let Some(file_id) = load(&rustc_workspace[tgt].root) {
736 let crate_id = add_target_crate_root(
738 &rustc_workspace[pkg],
743 &rustc_workspace[tgt].name,
745 pkg_to_lib_crate.insert(pkg, crate_id);
746 // Add dependencies on core / std / alloc for this crate
747 public_deps.add(crate_id, crate_graph);
748 rustc_pkg_crates.entry(pkg).or_insert_with(Vec::new).push(crate_id);
753 // Now add a dep edge from all targets of upstream to the lib
754 // target of downstream.
755 for pkg in rustc_pkg_crates.keys().copied() {
756 for dep in rustc_workspace[pkg].dependencies.iter() {
757 let name = CrateName::new(&dep.name).unwrap();
758 if let Some(&to) = pkg_to_lib_crate.get(&dep.pkg) {
759 for &from in rustc_pkg_crates.get(&pkg).into_iter().flatten() {
760 add_dep(crate_graph, from, name.clone(), to);
765 // Add a dependency on the rustc_private crates for all targets of each package
767 for dep in rustc_workspace.packages() {
768 let name = CrateName::normalize_dashes(&rustc_workspace[dep].name);
770 if let Some(&to) = pkg_to_lib_crate.get(&dep) {
771 for pkg in cargo.packages() {
772 let package = &cargo[pkg];
773 if !package.metadata.rustc_private {
776 for (from, _) in pkg_crates.get(&pkg).into_iter().flatten() {
777 // Avoid creating duplicate dependencies
778 // This avoids the situation where `from` depends on e.g. `arrayvec`, but
779 // `rust_analyzer` thinks that it should use the one from the `rustcSource`
780 // instead of the one from `crates.io`
781 if !crate_graph[*from].dependencies.iter().any(|d| d.name == name) {
782 add_dep(crate_graph, *from, name.clone(), to);
790 fn add_target_crate_root(
791 crate_graph: &mut CrateGraph,
793 build_data: Option<&BuildScriptOutput>,
794 cfg_options: &CfgOptions,
795 load_proc_macro: &mut dyn FnMut(&AbsPath) -> Vec<ProcMacro>,
799 let edition = pkg.edition;
801 let mut opts = cfg_options.clone();
802 for feature in pkg.active_features.iter() {
803 opts.insert_key_value("feature".into(), feature.into());
805 if let Some(cfgs) = build_data.as_ref().map(|it| &it.cfgs) {
806 opts.extend(cfgs.iter().cloned());
811 let mut env = Env::default();
812 inject_cargo_env(pkg, &mut env);
814 if let Some(envs) = build_data.map(|it| &it.envs) {
816 env.set(k, v.clone());
820 let proc_macro = build_data
822 .and_then(|it| it.proc_macro_dylib_path.as_ref())
823 .map(|it| load_proc_macro(it))
824 .unwrap_or_default();
826 let display_name = CrateDisplayName::from_canonical_name(cargo_name.to_string());
827 let mut potential_cfg_options = cfg_options.clone();
828 potential_cfg_options.extend(
831 .map(|feat| CfgFlag::KeyValue { key: "feature".into(), value: feat.0.into() }),
833 crate_graph.add_crate_root(
837 Some(pkg.version.to_string()),
839 potential_cfg_options,
842 CrateOrigin::CratesIo { repo: pkg.repository.clone() },
847 struct SysrootPublicDeps {
848 deps: Vec<(CrateName, CrateId, bool)>,
851 impl SysrootPublicDeps {
852 /// Makes `from` depend on the public sysroot crates.
853 fn add(&self, from: CrateId, crate_graph: &mut CrateGraph) {
854 for (name, krate, prelude) in &self.deps {
855 add_dep_with_prelude(crate_graph, from, name.clone(), *krate, *prelude);
860 fn sysroot_to_crate_graph(
861 crate_graph: &mut CrateGraph,
863 rustc_cfg: Vec<CfgFlag>,
864 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
865 ) -> (SysrootPublicDeps, Option<CrateId>) {
866 let _p = profile::span("sysroot_to_crate_graph");
867 let mut cfg_options = CfgOptions::default();
868 cfg_options.extend(rustc_cfg);
869 let sysroot_crates: FxHashMap<SysrootCrate, CrateId> = sysroot
871 .filter_map(|krate| {
872 let file_id = load(&sysroot[krate].root)?;
874 let env = Env::default();
875 let proc_macro = vec![];
876 let display_name = CrateDisplayName::from_canonical_name(sysroot[krate].name.clone());
877 let crate_id = crate_graph.add_crate_root(
888 Some((krate, crate_id))
892 for from in sysroot.crates() {
893 for &to in sysroot[from].deps.iter() {
894 let name = CrateName::new(&sysroot[to].name).unwrap();
895 if let (Some(&from), Some(&to)) = (sysroot_crates.get(&from), sysroot_crates.get(&to)) {
896 add_dep(crate_graph, from, name, to);
901 let public_deps = SysrootPublicDeps {
904 .map(|(name, idx, prelude)| {
905 (CrateName::new(name).unwrap(), sysroot_crates[&idx], prelude)
907 .collect::<Vec<_>>(),
910 let libproc_macro = sysroot.proc_macro().and_then(|it| sysroot_crates.get(&it).copied());
911 (public_deps, libproc_macro)
914 fn add_dep(graph: &mut CrateGraph, from: CrateId, name: CrateName, to: CrateId) {
915 add_dep_inner(graph, from, Dependency::new(name, to))
918 fn add_dep_with_prelude(
919 graph: &mut CrateGraph,
925 add_dep_inner(graph, from, Dependency::with_prelude(name, to, prelude))
928 fn add_dep_inner(graph: &mut CrateGraph, from: CrateId, dep: Dependency) {
929 if let Err(err) = graph.add_dep(from, dep) {
930 tracing::error!("{}", err)
934 /// Recreates the compile-time environment variables that Cargo sets.
936 /// Should be synced with
937 /// <https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-crates>
939 /// FIXME: ask Cargo to provide this data instead of re-deriving.
940 fn inject_cargo_env(package: &PackageData, env: &mut Env) {
941 // FIXME: Missing variables:
942 // CARGO_BIN_NAME, CARGO_BIN_EXE_<name>
944 let manifest_dir = package.manifest.parent();
945 env.set("CARGO_MANIFEST_DIR", manifest_dir.as_os_str().to_string_lossy().into_owned());
947 // Not always right, but works for common cases.
948 env.set("CARGO", "cargo".into());
950 env.set("CARGO_PKG_VERSION", package.version.to_string());
951 env.set("CARGO_PKG_VERSION_MAJOR", package.version.major.to_string());
952 env.set("CARGO_PKG_VERSION_MINOR", package.version.minor.to_string());
953 env.set("CARGO_PKG_VERSION_PATCH", package.version.patch.to_string());
954 env.set("CARGO_PKG_VERSION_PRE", package.version.pre.to_string());
956 env.set("CARGO_PKG_AUTHORS", String::new());
958 env.set("CARGO_PKG_NAME", package.name.clone());
959 // FIXME: This isn't really correct (a package can have many crates with different names), but
960 // it's better than leaving the variable unset.
961 env.set("CARGO_CRATE_NAME", CrateName::normalize_dashes(&package.name).to_string());
962 env.set("CARGO_PKG_DESCRIPTION", String::new());
963 env.set("CARGO_PKG_HOMEPAGE", String::new());
964 env.set("CARGO_PKG_REPOSITORY", String::new());
965 env.set("CARGO_PKG_LICENSE", String::new());
967 env.set("CARGO_PKG_LICENSE_FILE", String::new());