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, Dependency, Edition, Env, FileId, ProcMacro,
11 use cfg::{CfgDiff, CfgOptions};
12 use paths::{AbsPath, AbsPathBuf};
13 use rustc_hash::{FxHashMap, FxHashSet};
17 build_scripts::BuildScriptOutput,
18 cargo_workspace::{DepKind, PackageData, RustcSource},
21 sysroot::SysrootCrate,
22 utf8_stdout, CargoConfig, CargoWorkspace, ManifestPath, ProjectJson, ProjectManifest, Sysroot,
23 TargetKind, WorkspaceBuildScripts,
26 /// A set of cfg-overrides per crate.
28 /// `Wildcard(..)` is useful e.g. disabling `#[cfg(test)]` on all crates,
29 /// without having to first obtain a list of all crates.
30 #[derive(Debug, Clone, Eq, PartialEq)]
31 pub enum CfgOverrides {
32 /// A single global set of overrides matching all crates.
34 /// A set of overrides matching specific crates.
35 Selective(FxHashMap<String, CfgDiff>),
38 impl Default for CfgOverrides {
39 fn default() -> Self {
40 Self::Selective(FxHashMap::default())
45 pub fn len(&self) -> usize {
47 CfgOverrides::Wildcard(_) => 1,
48 CfgOverrides::Selective(hash_map) => hash_map.len(),
53 /// `PackageRoot` describes a package root folder.
54 /// Which may be an external dependency, or a member of
55 /// the current workspace.
56 #[derive(Debug, Clone, Eq, PartialEq, Hash)]
57 pub struct PackageRoot {
58 /// Is from the local filesystem and may be edited
60 pub include: Vec<AbsPathBuf>,
61 pub exclude: Vec<AbsPathBuf>,
64 #[derive(Clone, Eq, PartialEq)]
65 pub enum ProjectWorkspace {
66 /// Project workspace was discovered by running `cargo metadata` and `rustc --print sysroot`.
68 cargo: CargoWorkspace,
69 build_scripts: WorkspaceBuildScripts,
70 sysroot: Option<Sysroot>,
71 rustc: Option<CargoWorkspace>,
72 /// Holds cfg flags for the current target. We get those by running
73 /// `rustc --print cfg`.
75 /// FIXME: make this a per-crate map, as, eg, build.rs might have a
77 rustc_cfg: Vec<CfgFlag>,
78 cfg_overrides: CfgOverrides,
80 /// Project workspace was manually specified using a `rust-project.json` file.
81 Json { project: ProjectJson, sysroot: Option<Sysroot>, rustc_cfg: Vec<CfgFlag> },
83 // FIXME: The primary limitation of this approach is that the set of detached files needs to be fixed at the beginning.
84 // That's not the end user experience we should strive for.
85 // Ideally, you should be able to just open a random detached file in existing cargo projects, and get the basic features working.
86 // That needs some changes on the salsa-level though.
87 // 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).
88 // 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.
89 // 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.
91 /// Project with a set of disjoint files, not belonging to any particular workspace.
92 /// Backed by basic sysroot crates for basic completion and highlighting.
93 DetachedFiles { files: Vec<AbsPathBuf>, sysroot: Sysroot, rustc_cfg: Vec<CfgFlag> },
96 impl fmt::Debug for ProjectWorkspace {
97 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
98 // Make sure this isn't too verbose.
100 ProjectWorkspace::Cargo {
108 .debug_struct("Cargo")
109 .field("root", &cargo.workspace_root().file_name())
110 .field("n_packages", &cargo.packages().len())
111 .field("sysroot", &sysroot.is_some())
113 "n_rustc_compiler_crates",
114 &rustc.as_ref().map_or(0, |rc| rc.packages().len()),
116 .field("n_rustc_cfg", &rustc_cfg.len())
117 .field("n_cfg_overrides", &cfg_overrides.len())
119 ProjectWorkspace::Json { project, sysroot, rustc_cfg } => {
120 let mut debug_struct = f.debug_struct("Json");
121 debug_struct.field("n_crates", &project.n_crates());
122 if let Some(sysroot) = sysroot {
123 debug_struct.field("n_sysroot_crates", &sysroot.crates().len());
125 debug_struct.field("n_rustc_cfg", &rustc_cfg.len());
126 debug_struct.finish()
128 ProjectWorkspace::DetachedFiles { files, sysroot, rustc_cfg } => f
129 .debug_struct("DetachedFiles")
130 .field("n_files", &files.len())
131 .field("n_sysroot_crates", &sysroot.crates().len())
132 .field("n_rustc_cfg", &rustc_cfg.len())
138 impl ProjectWorkspace {
140 manifest: ProjectManifest,
141 config: &CargoConfig,
142 progress: &dyn Fn(String),
143 ) -> Result<ProjectWorkspace> {
144 let res = match manifest {
145 ProjectManifest::ProjectJson(project_json) => {
146 let file = fs::read_to_string(&project_json).with_context(|| {
147 format!("Failed to read json file {}", project_json.display())
149 let data = serde_json::from_str(&file).with_context(|| {
150 format!("Failed to deserialize json file {}", project_json.display())
152 let project_location = project_json.parent().to_path_buf();
153 let project_json = ProjectJson::new(&project_location, data);
154 ProjectWorkspace::load_inline(project_json, config.target.as_deref())?
156 ProjectManifest::CargoToml(cargo_toml) => {
157 let cargo_version = utf8_stdout({
158 let mut cmd = Command::new(toolchain::cargo());
159 cmd.arg("--version");
163 let meta = CargoWorkspace::fetch_metadata(
171 "Failed to read Cargo metadata from Cargo.toml file {}, {}",
172 cargo_toml.display(),
176 let cargo = CargoWorkspace::new(meta);
178 let sysroot = if config.no_sysroot {
181 Some(Sysroot::discover(cargo_toml.parent()).with_context(|| {
183 "Failed to find sysroot for Cargo.toml file {}. Is rust-src installed?",
189 let rustc_dir = match &config.rustc_source {
190 Some(RustcSource::Path(path)) => ManifestPath::try_from(path.clone()).ok(),
191 Some(RustcSource::Discover) => Sysroot::discover_rustc(&cargo_toml),
195 let rustc = match rustc_dir {
196 Some(rustc_dir) => Some({
197 let meta = CargoWorkspace::fetch_metadata(
204 "Failed to read Cargo metadata for Rust sources".to_string()
206 CargoWorkspace::new(meta)
211 let rustc_cfg = rustc_cfg::get(Some(&cargo_toml), config.target.as_deref());
213 let cfg_overrides = config.cfg_overrides();
214 ProjectWorkspace::Cargo {
216 build_scripts: WorkspaceBuildScripts::default(),
229 project_json: ProjectJson,
230 target: Option<&str>,
231 ) -> Result<ProjectWorkspace> {
232 let sysroot = match &project_json.sysroot_src {
233 Some(path) => Some(Sysroot::load(path.clone())?),
236 let rustc_cfg = rustc_cfg::get(None, target);
237 Ok(ProjectWorkspace::Json { project: project_json, sysroot, rustc_cfg })
240 pub fn load_detached_files(detached_files: Vec<AbsPathBuf>) -> Result<ProjectWorkspace> {
241 let sysroot = Sysroot::discover(
244 .and_then(|it| it.parent())
245 .ok_or_else(|| format_err!("No detached files to load"))?,
247 let rustc_cfg = rustc_cfg::get(None, None);
248 Ok(ProjectWorkspace::DetachedFiles { files: detached_files, sysroot, rustc_cfg })
251 pub fn run_build_scripts(
253 config: &CargoConfig,
254 progress: &dyn Fn(String),
255 ) -> Result<WorkspaceBuildScripts> {
257 ProjectWorkspace::Cargo { cargo, .. } => {
258 WorkspaceBuildScripts::run(config, cargo, progress)
260 ProjectWorkspace::Json { .. } | ProjectWorkspace::DetachedFiles { .. } => {
261 Ok(WorkspaceBuildScripts::default())
266 pub fn set_build_scripts(&mut self, bs: WorkspaceBuildScripts) {
268 ProjectWorkspace::Cargo { build_scripts, .. } => *build_scripts = bs,
270 always!(bs == WorkspaceBuildScripts::default());
275 /// Returns the roots for the current `ProjectWorkspace`
276 /// The return type contains the path and whether or not
277 /// the root is a member of the current workspace
278 pub fn to_roots(&self) -> Vec<PackageRoot> {
280 ProjectWorkspace::Json { project, sysroot, rustc_cfg: _ } => project
282 .map(|(_, krate)| PackageRoot {
283 is_local: krate.is_workspace_member,
284 include: krate.include.clone(),
285 exclude: krate.exclude.clone(),
287 .collect::<FxHashSet<_>>()
289 .chain(sysroot.as_ref().into_iter().flat_map(|sysroot| {
290 sysroot.crates().map(move |krate| PackageRoot {
292 include: vec![sysroot[krate].root.parent().to_path_buf()],
296 .collect::<Vec<_>>(),
297 ProjectWorkspace::Cargo {
308 let is_local = cargo[pkg].is_local;
309 let pkg_root = cargo[pkg].manifest.parent().to_path_buf();
311 let mut include = vec![pkg_root.clone()];
313 build_scripts.outputs.get(pkg).and_then(|it| it.out_dir.clone()),
316 // In case target's path is manually set in Cargo.toml to be
317 // outside the package root, add its parent as an extra include.
318 // An example of this situation would look like this:
322 // path = "../../src/lib.rs"
324 let extra_targets = cargo[pkg]
327 .filter(|&&tgt| cargo[tgt].kind == TargetKind::Lib)
328 .filter_map(|&tgt| cargo[tgt].root.parent())
329 .map(|tgt| tgt.normalize().to_path_buf())
330 .filter(|path| !path.starts_with(&pkg_root));
331 include.extend(extra_targets);
333 let mut exclude = vec![pkg_root.join(".git")];
335 exclude.push(pkg_root.join("target"));
337 exclude.push(pkg_root.join("tests"));
338 exclude.push(pkg_root.join("examples"));
339 exclude.push(pkg_root.join("benches"));
341 PackageRoot { is_local, include, exclude }
343 .chain(sysroot.iter().map(|sysroot| PackageRoot {
345 include: vec![sysroot.root().to_path_buf()],
348 .chain(rustc.iter().flat_map(|rustc| {
349 rustc.packages().map(move |krate| PackageRoot {
351 include: vec![rustc[krate].manifest.parent().to_path_buf()],
357 ProjectWorkspace::DetachedFiles { files, sysroot, .. } => files
359 .map(|detached_file| PackageRoot {
361 include: vec![detached_file.clone()],
364 .chain(sysroot.crates().map(|krate| PackageRoot {
366 include: vec![sysroot[krate].root.parent().to_path_buf()],
373 pub fn n_packages(&self) -> usize {
375 ProjectWorkspace::Json { project, .. } => project.n_crates(),
376 ProjectWorkspace::Cargo { cargo, sysroot, rustc, .. } => {
377 let rustc_package_len = rustc.as_ref().map_or(0, |it| it.packages().len());
378 let sysroot_package_len = sysroot.as_ref().map_or(0, |it| it.crates().len());
379 cargo.packages().len() + sysroot_package_len + rustc_package_len
381 ProjectWorkspace::DetachedFiles { sysroot, files, .. } => {
382 sysroot.crates().len() + files.len()
387 pub fn to_crate_graph(
389 load_proc_macro: &mut dyn FnMut(&AbsPath) -> Vec<ProcMacro>,
390 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
392 let _p = profile::span("ProjectWorkspace::to_crate_graph");
394 let mut crate_graph = match self {
395 ProjectWorkspace::Json { project, sysroot, rustc_cfg } => project_json_to_crate_graph(
402 ProjectWorkspace::Cargo {
409 } => cargo_to_crate_graph(
419 ProjectWorkspace::DetachedFiles { files, sysroot, rustc_cfg } => {
420 detached_files_to_crate_graph(rustc_cfg.clone(), load, files, sysroot)
423 if crate_graph.patch_cfg_if() {
424 tracing::debug!("Patched std to depend on cfg-if")
426 tracing::debug!("Did not patch std to depend on cfg-if")
432 fn project_json_to_crate_graph(
433 rustc_cfg: Vec<CfgFlag>,
434 load_proc_macro: &mut dyn FnMut(&AbsPath) -> Vec<ProcMacro>,
435 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
436 project: &ProjectJson,
437 sysroot: &Option<Sysroot>,
439 let mut crate_graph = CrateGraph::default();
440 let sysroot_deps = sysroot
442 .map(|sysroot| sysroot_to_crate_graph(&mut crate_graph, sysroot, rustc_cfg.clone(), load));
444 let mut cfg_cache: FxHashMap<&str, Vec<CfgFlag>> = FxHashMap::default();
445 let crates: FxHashMap<CrateId, CrateId> = project
447 .filter_map(|(crate_id, krate)| {
448 let file_path = &krate.root_module;
449 let file_id = load(file_path)?;
450 Some((crate_id, krate, file_id))
452 .map(|(crate_id, krate, file_id)| {
453 let env = krate.env.clone().into_iter().collect();
454 let proc_macro = krate.proc_macro_dylib_path.clone().map(|it| load_proc_macro(&it));
456 let target_cfgs = match krate.target.as_deref() {
458 cfg_cache.entry(target).or_insert_with(|| rustc_cfg::get(None, Some(target)))
463 let mut cfg_options = CfgOptions::default();
464 cfg_options.extend(target_cfgs.iter().chain(krate.cfg.iter()).cloned());
467 crate_graph.add_crate_root(
470 krate.display_name.clone(),
474 proc_macro.unwrap_or_default(),
480 for (from, krate) in project.crates() {
481 if let Some(&from) = crates.get(&from) {
482 if let Some((public_deps, libproc_macro)) = &sysroot_deps {
483 public_deps.add(from, &mut crate_graph);
484 if krate.is_proc_macro {
485 if let Some(proc_macro) = libproc_macro {
489 CrateName::new("proc_macro").unwrap(),
496 for dep in &krate.deps {
497 if let Some(&to) = crates.get(&dep.crate_id) {
498 add_dep(&mut crate_graph, from, dep.name.clone(), to)
506 fn cargo_to_crate_graph(
507 rustc_cfg: Vec<CfgFlag>,
508 override_cfg: &CfgOverrides,
509 load_proc_macro: &mut dyn FnMut(&AbsPath) -> Vec<ProcMacro>,
510 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
511 cargo: &CargoWorkspace,
512 build_scripts: &WorkspaceBuildScripts,
513 sysroot: Option<&Sysroot>,
514 rustc: &Option<CargoWorkspace>,
516 let _p = profile::span("cargo_to_crate_graph");
517 let mut crate_graph = CrateGraph::default();
518 let (public_deps, libproc_macro) = match sysroot {
519 Some(sysroot) => sysroot_to_crate_graph(&mut crate_graph, sysroot, rustc_cfg.clone(), load),
520 None => (SysrootPublicDeps::default(), None),
523 let mut cfg_options = CfgOptions::default();
524 cfg_options.extend(rustc_cfg);
526 let mut pkg_to_lib_crate = FxHashMap::default();
528 // Add test cfg for non-sysroot crates
529 cfg_options.insert_atom("test".into());
530 cfg_options.insert_atom("debug_assertions".into());
532 let mut pkg_crates = FxHashMap::default();
533 // Does any crate signal to rust-analyzer that they need the rustc_private crates?
534 let mut has_private = false;
535 // Next, create crates for each package, target pair
536 for pkg in cargo.packages() {
537 let mut cfg_options = &cfg_options;
538 let mut replaced_cfg_options;
540 let overrides = match override_cfg {
541 CfgOverrides::Wildcard(cfg_diff) => Some(cfg_diff),
542 CfgOverrides::Selective(cfg_overrides) => cfg_overrides.get(&cargo[pkg].name),
545 if let Some(overrides) = overrides {
546 // FIXME: this is sort of a hack to deal with #![cfg(not(test))] vanishing such as seen
547 // in ed25519_dalek (#7243), and libcore (#9203) (although you only hit that one while
548 // working on rust-lang/rust as that's the only time it appears outside sysroot).
550 // A more ideal solution might be to reanalyze crates based on where the cursor is and
551 // figure out the set of cfgs that would have to apply to make it active.
553 replaced_cfg_options = cfg_options.clone();
554 replaced_cfg_options.apply_diff(overrides.clone());
555 cfg_options = &replaced_cfg_options;
558 has_private |= cargo[pkg].metadata.rustc_private;
559 let mut lib_tgt = None;
560 for &tgt in cargo[pkg].targets.iter() {
561 if let Some(file_id) = load(&cargo[tgt].root) {
562 let crate_id = add_target_crate_root(
565 build_scripts.outputs.get(pkg),
571 if cargo[tgt].kind == TargetKind::Lib {
572 lib_tgt = Some((crate_id, cargo[tgt].name.clone()));
573 pkg_to_lib_crate.insert(pkg, crate_id);
575 if let Some(proc_macro) = libproc_macro {
576 add_dep_with_prelude(
579 CrateName::new("proc_macro").unwrap(),
581 cargo[tgt].is_proc_macro,
585 pkg_crates.entry(pkg).or_insert_with(Vec::new).push((crate_id, cargo[tgt].kind));
589 // Set deps to the core, std and to the lib target of the current package
590 for (from, kind) in pkg_crates.get(&pkg).into_iter().flatten() {
591 if let Some((to, name)) = lib_tgt.clone() {
592 if to != *from && *kind != TargetKind::BuildScript {
593 // (build script can not depend on its library target)
595 // For root projects with dashes in their name,
596 // cargo metadata does not do any normalization,
597 // so we do it ourselves currently
598 let name = CrateName::normalize_dashes(&name);
599 add_dep(&mut crate_graph, *from, name, to);
602 public_deps.add(*from, &mut crate_graph);
606 // Now add a dep edge from all targets of upstream to the lib
607 // target of downstream.
608 for pkg in cargo.packages() {
609 for dep in cargo[pkg].dependencies.iter() {
610 let name = CrateName::new(&dep.name).unwrap();
611 if let Some(&to) = pkg_to_lib_crate.get(&dep.pkg) {
612 for (from, kind) in pkg_crates.get(&pkg).into_iter().flatten() {
613 if dep.kind == DepKind::Build && *kind != TargetKind::BuildScript {
614 // Only build scripts may depend on build dependencies.
617 if dep.kind != DepKind::Build && *kind == TargetKind::BuildScript {
618 // Build scripts may only depend on build dependencies.
622 add_dep(&mut crate_graph, *from, name.clone(), to)
629 // If the user provided a path to rustc sources, we add all the rustc_private crates
630 // and create dependencies on them for the crates which opt-in to that
631 if let Some(rustc_workspace) = rustc {
638 &mut pkg_to_lib_crate,
648 fn detached_files_to_crate_graph(
649 rustc_cfg: Vec<CfgFlag>,
650 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
651 detached_files: &[AbsPathBuf],
654 let _p = profile::span("detached_files_to_crate_graph");
655 let mut crate_graph = CrateGraph::default();
656 let (public_deps, _libproc_macro) =
657 sysroot_to_crate_graph(&mut crate_graph, sysroot, rustc_cfg.clone(), load);
659 let mut cfg_options = CfgOptions::default();
660 cfg_options.extend(rustc_cfg);
662 for detached_file in detached_files {
663 let file_id = match load(detached_file) {
664 Some(file_id) => file_id,
666 tracing::error!("Failed to load detached file {:?}", detached_file);
670 let display_name = detached_file
672 .and_then(|os_str| os_str.to_str())
673 .map(|file_stem| CrateDisplayName::from_canonical_name(file_stem.to_string()));
674 let detached_file_crate = crate_graph.add_crate_root(
684 public_deps.add(detached_file_crate, &mut crate_graph);
689 fn handle_rustc_crates(
690 rustc_workspace: &CargoWorkspace,
691 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
692 crate_graph: &mut CrateGraph,
693 cfg_options: &CfgOptions,
694 load_proc_macro: &mut dyn FnMut(&AbsPath) -> Vec<ProcMacro>,
695 pkg_to_lib_crate: &mut FxHashMap<la_arena::Idx<crate::PackageData>, CrateId>,
696 public_deps: &SysrootPublicDeps,
697 cargo: &CargoWorkspace,
698 pkg_crates: &FxHashMap<la_arena::Idx<crate::PackageData>, Vec<(CrateId, TargetKind)>>,
700 let mut rustc_pkg_crates = FxHashMap::default();
701 // The root package of the rustc-dev component is rustc_driver, so we match that
703 rustc_workspace.packages().find(|package| rustc_workspace[*package].name == "rustc_driver");
704 // The rustc workspace might be incomplete (such as if rustc-dev is not
705 // installed for the current toolchain) and `rustcSource` is set to discover.
706 if let Some(root_pkg) = root_pkg {
707 // Iterate through every crate in the dependency subtree of rustc_driver using BFS
708 let mut queue = VecDeque::new();
709 queue.push_back(root_pkg);
710 while let Some(pkg) = queue.pop_front() {
711 // Don't duplicate packages if they are dependended on a diamond pattern
712 // N.B. if this line is ommitted, we try to analyse over 4_800_000 crates
713 // which is not ideal
714 if rustc_pkg_crates.contains_key(&pkg) {
717 for dep in &rustc_workspace[pkg].dependencies {
718 queue.push_back(dep.pkg);
720 for &tgt in rustc_workspace[pkg].targets.iter() {
721 if rustc_workspace[tgt].kind != TargetKind::Lib {
724 if let Some(file_id) = load(&rustc_workspace[tgt].root) {
725 let crate_id = add_target_crate_root(
727 &rustc_workspace[pkg],
732 &rustc_workspace[tgt].name,
734 pkg_to_lib_crate.insert(pkg, crate_id);
735 // Add dependencies on core / std / alloc for this crate
736 public_deps.add(crate_id, crate_graph);
737 rustc_pkg_crates.entry(pkg).or_insert_with(Vec::new).push(crate_id);
742 // Now add a dep edge from all targets of upstream to the lib
743 // target of downstream.
744 for pkg in rustc_pkg_crates.keys().copied() {
745 for dep in rustc_workspace[pkg].dependencies.iter() {
746 let name = CrateName::new(&dep.name).unwrap();
747 if let Some(&to) = pkg_to_lib_crate.get(&dep.pkg) {
748 for &from in rustc_pkg_crates.get(&pkg).into_iter().flatten() {
749 add_dep(crate_graph, from, name.clone(), to);
754 // Add a dependency on the rustc_private crates for all targets of each package
756 for dep in rustc_workspace.packages() {
757 let name = CrateName::normalize_dashes(&rustc_workspace[dep].name);
759 if let Some(&to) = pkg_to_lib_crate.get(&dep) {
760 for pkg in cargo.packages() {
761 let package = &cargo[pkg];
762 if !package.metadata.rustc_private {
765 for (from, _) in pkg_crates.get(&pkg).into_iter().flatten() {
766 // Avoid creating duplicate dependencies
767 // This avoids the situation where `from` depends on e.g. `arrayvec`, but
768 // `rust_analyzer` thinks that it should use the one from the `rustcSource`
769 // instead of the one from `crates.io`
770 if !crate_graph[*from].dependencies.iter().any(|d| d.name == name) {
771 add_dep(crate_graph, *from, name.clone(), to);
779 fn add_target_crate_root(
780 crate_graph: &mut CrateGraph,
782 build_data: Option<&BuildScriptOutput>,
783 cfg_options: &CfgOptions,
784 load_proc_macro: &mut dyn FnMut(&AbsPath) -> Vec<ProcMacro>,
788 let edition = pkg.edition;
790 let mut opts = cfg_options.clone();
791 for feature in pkg.active_features.iter() {
792 opts.insert_key_value("feature".into(), feature.into());
794 if let Some(cfgs) = build_data.as_ref().map(|it| &it.cfgs) {
795 opts.extend(cfgs.iter().cloned());
800 let mut env = Env::default();
801 inject_cargo_env(pkg, &mut env);
803 if let Some(envs) = build_data.map(|it| &it.envs) {
805 env.set(k, v.clone());
809 let proc_macro = build_data
811 .and_then(|it| it.proc_macro_dylib_path.as_ref())
812 .map(|it| load_proc_macro(it))
813 .unwrap_or_default();
815 let display_name = CrateDisplayName::from_canonical_name(cargo_name.to_string());
816 let mut potential_cfg_options = cfg_options.clone();
817 potential_cfg_options.extend(
820 .map(|feat| CfgFlag::KeyValue { key: "feature".into(), value: feat.0.into() }),
823 crate_graph.add_crate_root(
828 potential_cfg_options,
835 struct SysrootPublicDeps {
836 deps: Vec<(CrateName, CrateId, bool)>,
839 impl SysrootPublicDeps {
840 /// Makes `from` depend on the public sysroot crates.
841 fn add(&self, from: CrateId, crate_graph: &mut CrateGraph) {
842 for (name, krate, prelude) in &self.deps {
843 add_dep_with_prelude(crate_graph, from, name.clone(), *krate, *prelude);
848 fn sysroot_to_crate_graph(
849 crate_graph: &mut CrateGraph,
851 rustc_cfg: Vec<CfgFlag>,
852 load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
853 ) -> (SysrootPublicDeps, Option<CrateId>) {
854 let _p = profile::span("sysroot_to_crate_graph");
855 let mut cfg_options = CfgOptions::default();
856 cfg_options.extend(rustc_cfg);
857 let sysroot_crates: FxHashMap<SysrootCrate, CrateId> = sysroot
859 .filter_map(|krate| {
860 let file_id = load(&sysroot[krate].root)?;
862 let env = Env::default();
863 let proc_macro = vec![];
864 let display_name = CrateDisplayName::from_canonical_name(sysroot[krate].name.clone());
865 let crate_id = crate_graph.add_crate_root(
874 Some((krate, crate_id))
878 for from in sysroot.crates() {
879 for &to in sysroot[from].deps.iter() {
880 let name = CrateName::new(&sysroot[to].name).unwrap();
881 if let (Some(&from), Some(&to)) = (sysroot_crates.get(&from), sysroot_crates.get(&to)) {
882 add_dep(crate_graph, from, name, to);
887 let public_deps = SysrootPublicDeps {
890 .map(|(name, idx, prelude)| {
891 (CrateName::new(name).unwrap(), sysroot_crates[&idx], prelude)
893 .collect::<Vec<_>>(),
896 let libproc_macro = sysroot.proc_macro().and_then(|it| sysroot_crates.get(&it).copied());
897 (public_deps, libproc_macro)
900 fn add_dep(graph: &mut CrateGraph, from: CrateId, name: CrateName, to: CrateId) {
901 add_dep_inner(graph, from, Dependency::new(name, to))
904 fn add_dep_with_prelude(
905 graph: &mut CrateGraph,
911 add_dep_inner(graph, from, Dependency::with_prelude(name, to, prelude))
914 fn add_dep_inner(graph: &mut CrateGraph, from: CrateId, dep: Dependency) {
915 if let Err(err) = graph.add_dep(from, dep) {
916 tracing::error!("{}", err)
920 /// Recreates the compile-time environment variables that Cargo sets.
922 /// Should be synced with
923 /// <https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-crates>
925 /// FIXME: ask Cargo to provide this data instead of re-deriving.
926 fn inject_cargo_env(package: &PackageData, env: &mut Env) {
927 // FIXME: Missing variables:
928 // CARGO_BIN_NAME, CARGO_BIN_EXE_<name>
930 let manifest_dir = package.manifest.parent();
931 env.set("CARGO_MANIFEST_DIR", manifest_dir.as_os_str().to_string_lossy().into_owned());
933 // Not always right, but works for common cases.
934 env.set("CARGO", "cargo".into());
936 env.set("CARGO_PKG_VERSION", package.version.to_string());
937 env.set("CARGO_PKG_VERSION_MAJOR", package.version.major.to_string());
938 env.set("CARGO_PKG_VERSION_MINOR", package.version.minor.to_string());
939 env.set("CARGO_PKG_VERSION_PATCH", package.version.patch.to_string());
940 env.set("CARGO_PKG_VERSION_PRE", package.version.pre.to_string());
942 env.set("CARGO_PKG_AUTHORS", String::new());
944 env.set("CARGO_PKG_NAME", package.name.clone());
945 // FIXME: This isn't really correct (a package can have many crates with different names), but
946 // it's better than leaving the variable unset.
947 env.set("CARGO_CRATE_NAME", CrateName::normalize_dashes(&package.name).to_string());
948 env.set("CARGO_PKG_DESCRIPTION", String::new());
949 env.set("CARGO_PKG_HOMEPAGE", String::new());
950 env.set("CARGO_PKG_REPOSITORY", String::new());
951 env.set("CARGO_PKG_LICENSE", String::new());
953 env.set("CARGO_PKG_LICENSE_FILE", String::new());