653 lines
25 KiB
Rust
653 lines
25 KiB
Rust
//! Handles lowering of build-system specific workspace information (`cargo
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//! metadata` or `rust-project.json`) into representation stored in the salsa
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//! database -- `CrateGraph`.
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use std::{collections::VecDeque, fmt, fs, path::Path, process::Command};
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use anyhow::{Context, Result};
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use base_db::{CrateDisplayName, CrateGraph, CrateId, CrateName, Edition, Env, FileId, ProcMacro};
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use cfg::CfgOptions;
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use paths::{AbsPath, AbsPathBuf};
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use proc_macro_api::ProcMacroClient;
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use rustc_hash::{FxHashMap, FxHashSet};
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use crate::{
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build_data::{BuildData, BuildDataMap, BuildDataResult},
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cargo_workspace,
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cfg_flag::CfgFlag,
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rustc_cfg,
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sysroot::SysrootCrate,
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utf8_stdout, BuildDataCollector, CargoConfig, CargoWorkspace, ProjectJson, ProjectManifest,
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Sysroot, TargetKind,
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};
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/// `PackageRoot` describes a package root folder.
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/// Which may be an external dependency, or a member of
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/// the current workspace.
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#[derive(Debug, Clone, Eq, PartialEq, Hash)]
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pub struct PackageRoot {
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/// Is a member of the current workspace
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pub is_member: bool,
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pub include: Vec<AbsPathBuf>,
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pub exclude: Vec<AbsPathBuf>,
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}
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#[derive(Clone, Eq, PartialEq)]
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pub enum ProjectWorkspace {
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/// Project workspace was discovered by running `cargo metadata` and `rustc --print sysroot`.
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Cargo {
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cargo: CargoWorkspace,
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sysroot: Sysroot,
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rustc: Option<CargoWorkspace>,
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/// Holds cfg flags for the current target. We get those by running
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/// `rustc --print cfg`.
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///
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/// FIXME: make this a per-crate map, as, eg, build.rs might have a
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/// different target.
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rustc_cfg: Vec<CfgFlag>,
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},
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/// Project workspace was manually specified using a `rust-project.json` file.
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Json { project: ProjectJson, sysroot: Option<Sysroot>, rustc_cfg: Vec<CfgFlag> },
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}
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impl fmt::Debug for ProjectWorkspace {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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// Make sure this isn't too verbose.
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match self {
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ProjectWorkspace::Cargo { cargo, sysroot, rustc, rustc_cfg } => f
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.debug_struct("Cargo")
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.field("root", &cargo.workspace_root().file_name())
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.field("n_packages", &cargo.packages().len())
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.field("n_sysroot_crates", &sysroot.crates().len())
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.field(
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"n_rustc_compiler_crates",
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&rustc.as_ref().map_or(0, |rc| rc.packages().len()),
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)
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.field("n_rustc_cfg", &rustc_cfg.len())
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.finish(),
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ProjectWorkspace::Json { project, sysroot, rustc_cfg } => {
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let mut debug_struct = f.debug_struct("Json");
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debug_struct.field("n_crates", &project.n_crates());
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if let Some(sysroot) = sysroot {
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debug_struct.field("n_sysroot_crates", &sysroot.crates().len());
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}
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debug_struct.field("n_rustc_cfg", &rustc_cfg.len());
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debug_struct.finish()
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}
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}
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}
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}
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impl ProjectWorkspace {
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pub fn load(
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manifest: ProjectManifest,
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config: &CargoConfig,
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progress: &dyn Fn(String),
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) -> Result<ProjectWorkspace> {
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let res = match manifest {
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ProjectManifest::ProjectJson(project_json) => {
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let file = fs::read_to_string(&project_json).with_context(|| {
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format!("Failed to read json file {}", project_json.display())
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})?;
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let data = serde_json::from_str(&file).with_context(|| {
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format!("Failed to deserialize json file {}", project_json.display())
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})?;
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let project_location = project_json.parent().unwrap().to_path_buf();
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let project_json = ProjectJson::new(&project_location, data);
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ProjectWorkspace::load_inline(project_json, config.target.as_deref())?
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}
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ProjectManifest::CargoToml(cargo_toml) => {
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let cargo_version = utf8_stdout({
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let mut cmd = Command::new(toolchain::cargo());
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cmd.arg("--version");
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cmd
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})?;
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let cargo = CargoWorkspace::from_cargo_metadata(&cargo_toml, config, progress)
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.with_context(|| {
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format!(
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"Failed to read Cargo metadata from Cargo.toml file {}, {}",
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cargo_toml.display(),
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cargo_version
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)
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})?;
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let sysroot = if config.no_sysroot {
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Sysroot::default()
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} else {
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Sysroot::discover(&cargo_toml).with_context(|| {
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format!(
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"Failed to find sysroot for Cargo.toml file {}. Is rust-src installed?",
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cargo_toml.display()
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)
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})?
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};
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let rustc_dir = if let Some(rustc_source) = &config.rustc_source {
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use cargo_workspace::RustcSource;
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match rustc_source {
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RustcSource::Path(path) => Some(path.clone()),
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RustcSource::Discover => Sysroot::discover_rustc(&cargo_toml),
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}
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} else {
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None
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};
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let rustc = if let Some(rustc_dir) = rustc_dir {
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Some(
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CargoWorkspace::from_cargo_metadata(&rustc_dir, config, progress)
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.with_context(|| {
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format!("Failed to read Cargo metadata for Rust sources")
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})?,
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)
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} else {
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None
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};
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let rustc_cfg = rustc_cfg::get(config.target.as_deref());
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ProjectWorkspace::Cargo { cargo, sysroot, rustc, rustc_cfg }
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}
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};
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Ok(res)
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}
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pub fn load_inline(
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project_json: ProjectJson,
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target: Option<&str>,
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) -> Result<ProjectWorkspace> {
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let sysroot = match &project_json.sysroot_src {
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Some(path) => Some(Sysroot::load(path)?),
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None => None,
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};
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let rustc_cfg = rustc_cfg::get(target);
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Ok(ProjectWorkspace::Json { project: project_json, sysroot, rustc_cfg })
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}
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/// Returns the roots for the current `ProjectWorkspace`
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/// The return type contains the path and whether or not
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/// the root is a member of the current workspace
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pub fn to_roots(&self, build_data: Option<&BuildDataResult>) -> Vec<PackageRoot> {
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match self {
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ProjectWorkspace::Json { project, sysroot, rustc_cfg: _ } => project
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.crates()
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.map(|(_, krate)| PackageRoot {
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is_member: krate.is_workspace_member,
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include: krate.include.clone(),
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exclude: krate.exclude.clone(),
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})
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.collect::<FxHashSet<_>>()
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.into_iter()
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.chain(sysroot.as_ref().into_iter().flat_map(|sysroot| {
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sysroot.crates().map(move |krate| PackageRoot {
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is_member: false,
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include: vec![sysroot[krate].root_dir().to_path_buf()],
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exclude: Vec::new(),
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})
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}))
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.collect::<Vec<_>>(),
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ProjectWorkspace::Cargo { cargo, sysroot, rustc, rustc_cfg: _ } => cargo
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.packages()
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.map(|pkg| {
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let is_member = cargo[pkg].is_member;
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let pkg_root = cargo[pkg].root().to_path_buf();
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let mut include = vec![pkg_root.clone()];
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include.extend(
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build_data
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.and_then(|it| it.get(cargo.workspace_root()))
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.and_then(|map| map.get(&cargo[pkg].id))
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.and_then(|it| it.out_dir.clone()),
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);
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let mut exclude = vec![pkg_root.join(".git")];
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if is_member {
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exclude.push(pkg_root.join("target"));
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} else {
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exclude.push(pkg_root.join("tests"));
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exclude.push(pkg_root.join("examples"));
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exclude.push(pkg_root.join("benches"));
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}
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PackageRoot { is_member, include, exclude }
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})
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.chain(sysroot.crates().map(|krate| PackageRoot {
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is_member: false,
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include: vec![sysroot[krate].root_dir().to_path_buf()],
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exclude: Vec::new(),
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}))
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.chain(rustc.into_iter().flat_map(|rustc| {
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rustc.packages().map(move |krate| PackageRoot {
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is_member: false,
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include: vec![rustc[krate].root().to_path_buf()],
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exclude: Vec::new(),
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})
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}))
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.collect(),
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}
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}
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pub fn n_packages(&self) -> usize {
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match self {
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ProjectWorkspace::Json { project, .. } => project.n_crates(),
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ProjectWorkspace::Cargo { cargo, sysroot, rustc, .. } => {
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let rustc_package_len = rustc.as_ref().map_or(0, |rc| rc.packages().len());
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cargo.packages().len() + sysroot.crates().len() + rustc_package_len
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}
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}
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}
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pub fn to_crate_graph(
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&self,
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build_data: Option<&BuildDataResult>,
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proc_macro_client: Option<&ProcMacroClient>,
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load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
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) -> CrateGraph {
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let _p = profile::span("ProjectWorkspace::to_crate_graph");
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let proc_macro_loader = |path: &Path| match proc_macro_client {
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Some(client) => client.by_dylib_path(path),
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None => Vec::new(),
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};
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let mut crate_graph = match self {
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ProjectWorkspace::Json { project, sysroot, rustc_cfg } => project_json_to_crate_graph(
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rustc_cfg.clone(),
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&proc_macro_loader,
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load,
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project,
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sysroot,
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),
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ProjectWorkspace::Cargo { cargo, sysroot, rustc, rustc_cfg } => cargo_to_crate_graph(
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rustc_cfg.clone(),
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&proc_macro_loader,
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load,
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cargo,
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build_data.and_then(|it| it.get(cargo.workspace_root())),
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sysroot,
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rustc,
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rustc.as_ref().zip(build_data).and_then(|(it, map)| map.get(it.workspace_root())),
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),
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};
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if crate_graph.patch_cfg_if() {
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log::debug!("Patched std to depend on cfg-if")
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} else {
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log::debug!("Did not patch std to depend on cfg-if")
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}
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crate_graph
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}
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pub fn collect_build_data_configs(&self, collector: &mut BuildDataCollector) {
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match self {
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ProjectWorkspace::Cargo { cargo, .. } => {
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collector.add_config(&cargo.workspace_root(), cargo.build_data_config().clone());
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}
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_ => {}
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}
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}
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}
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fn project_json_to_crate_graph(
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rustc_cfg: Vec<CfgFlag>,
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proc_macro_loader: &dyn Fn(&Path) -> Vec<ProcMacro>,
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load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
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project: &ProjectJson,
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sysroot: &Option<Sysroot>,
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) -> CrateGraph {
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let mut crate_graph = CrateGraph::default();
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let sysroot_deps = sysroot
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.as_ref()
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.map(|sysroot| sysroot_to_crate_graph(&mut crate_graph, sysroot, rustc_cfg.clone(), load));
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let mut cfg_cache: FxHashMap<&str, Vec<CfgFlag>> = FxHashMap::default();
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let crates: FxHashMap<CrateId, CrateId> = project
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.crates()
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.filter_map(|(crate_id, krate)| {
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let file_path = &krate.root_module;
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let file_id = load(&file_path)?;
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Some((crate_id, krate, file_id))
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})
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.map(|(crate_id, krate, file_id)| {
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let env = krate.env.clone().into_iter().collect();
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let proc_macro = krate.proc_macro_dylib_path.clone().map(|it| proc_macro_loader(&it));
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let target_cfgs = match krate.target.as_deref() {
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Some(target) => {
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cfg_cache.entry(target).or_insert_with(|| rustc_cfg::get(Some(target)))
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}
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None => &rustc_cfg,
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};
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let mut cfg_options = CfgOptions::default();
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cfg_options.extend(target_cfgs.iter().chain(krate.cfg.iter()).cloned());
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(
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crate_id,
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crate_graph.add_crate_root(
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file_id,
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krate.edition,
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krate.display_name.clone(),
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cfg_options,
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env,
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proc_macro.unwrap_or_default(),
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),
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)
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})
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.collect();
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for (from, krate) in project.crates() {
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if let Some(&from) = crates.get(&from) {
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if let Some((public_deps, _proc_macro)) = &sysroot_deps {
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for (name, to) in public_deps.iter() {
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add_dep(&mut crate_graph, from, name.clone(), *to)
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}
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}
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for dep in &krate.deps {
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if let Some(&to) = crates.get(&dep.crate_id) {
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add_dep(&mut crate_graph, from, dep.name.clone(), to)
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}
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}
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}
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}
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crate_graph
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}
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fn cargo_to_crate_graph(
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rustc_cfg: Vec<CfgFlag>,
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proc_macro_loader: &dyn Fn(&Path) -> Vec<ProcMacro>,
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load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
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cargo: &CargoWorkspace,
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build_data_map: Option<&BuildDataMap>,
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sysroot: &Sysroot,
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rustc: &Option<CargoWorkspace>,
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rustc_build_data_map: Option<&BuildDataMap>,
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) -> CrateGraph {
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let _p = profile::span("cargo_to_crate_graph");
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let mut crate_graph = CrateGraph::default();
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let (public_deps, libproc_macro) =
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sysroot_to_crate_graph(&mut crate_graph, sysroot, rustc_cfg.clone(), load);
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let mut cfg_options = CfgOptions::default();
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cfg_options.extend(rustc_cfg);
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let mut pkg_to_lib_crate = FxHashMap::default();
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// Add test cfg for non-sysroot crates
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cfg_options.insert_atom("test".into());
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cfg_options.insert_atom("debug_assertions".into());
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let mut pkg_crates = FxHashMap::default();
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// Does any crate signal to rust-analyzer that they need the rustc_private crates?
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let mut has_private = false;
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// Next, create crates for each package, target pair
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for pkg in cargo.packages() {
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has_private |= cargo[pkg].metadata.rustc_private;
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let mut lib_tgt = None;
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for &tgt in cargo[pkg].targets.iter() {
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if let Some(file_id) = load(&cargo[tgt].root) {
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let crate_id = add_target_crate_root(
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&mut crate_graph,
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&cargo[pkg],
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build_data_map.and_then(|it| it.get(&cargo[pkg].id)),
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&cfg_options,
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proc_macro_loader,
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file_id,
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);
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if cargo[tgt].kind == TargetKind::Lib {
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lib_tgt = Some((crate_id, cargo[tgt].name.clone()));
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pkg_to_lib_crate.insert(pkg, crate_id);
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}
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if cargo[tgt].is_proc_macro {
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if let Some(proc_macro) = libproc_macro {
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add_dep(
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&mut crate_graph,
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crate_id,
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CrateName::new("proc_macro").unwrap(),
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proc_macro,
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);
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}
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}
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pkg_crates.entry(pkg).or_insert_with(Vec::new).push(crate_id);
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}
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}
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// Set deps to the core, std and to the lib target of the current package
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for &from in pkg_crates.get(&pkg).into_iter().flatten() {
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if let Some((to, name)) = lib_tgt.clone() {
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if to != from {
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// For root projects with dashes in their name,
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// cargo metadata does not do any normalization,
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// so we do it ourselves currently
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let name = CrateName::normalize_dashes(&name);
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add_dep(&mut crate_graph, from, name, to);
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}
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}
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for (name, krate) in public_deps.iter() {
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add_dep(&mut crate_graph, from, name.clone(), *krate);
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}
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}
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}
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// Now add a dep edge from all targets of upstream to the lib
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// target of downstream.
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for pkg in cargo.packages() {
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for dep in cargo[pkg].dependencies.iter() {
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let name = CrateName::new(&dep.name).unwrap();
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if let Some(&to) = pkg_to_lib_crate.get(&dep.pkg) {
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for &from in pkg_crates.get(&pkg).into_iter().flatten() {
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add_dep(&mut crate_graph, from, name.clone(), to)
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}
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}
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}
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}
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|
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if has_private {
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// If the user provided a path to rustc sources, we add all the rustc_private crates
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// and create dependencies on them for the crates which opt-in to that
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if let Some(rustc_workspace) = rustc {
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handle_rustc_crates(
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rustc_workspace,
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load,
|
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&mut crate_graph,
|
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rustc_build_data_map,
|
|
&cfg_options,
|
|
proc_macro_loader,
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&mut pkg_to_lib_crate,
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&public_deps,
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cargo,
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&pkg_crates,
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);
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}
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}
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crate_graph
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}
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|
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fn handle_rustc_crates(
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rustc_workspace: &CargoWorkspace,
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load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
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crate_graph: &mut CrateGraph,
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|
rustc_build_data_map: Option<&FxHashMap<String, BuildData>>,
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|
cfg_options: &CfgOptions,
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proc_macro_loader: &dyn Fn(&Path) -> Vec<ProcMacro>,
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pkg_to_lib_crate: &mut FxHashMap<la_arena::Idx<crate::PackageData>, CrateId>,
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public_deps: &[(CrateName, CrateId)],
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cargo: &CargoWorkspace,
|
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pkg_crates: &FxHashMap<la_arena::Idx<crate::PackageData>, Vec<CrateId>>,
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) {
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let mut rustc_pkg_crates = FxHashMap::default();
|
|
// The root package of the rustc-dev component is rustc_driver, so we match that
|
|
let root_pkg =
|
|
rustc_workspace.packages().find(|package| rustc_workspace[*package].name == "rustc_driver");
|
|
// The rustc workspace might be incomplete (such as if rustc-dev is not
|
|
// installed for the current toolchain) and `rustcSource` is set to discover.
|
|
if let Some(root_pkg) = root_pkg {
|
|
// Iterate through every crate in the dependency subtree of rustc_driver using BFS
|
|
let mut queue = VecDeque::new();
|
|
queue.push_back(root_pkg);
|
|
while let Some(pkg) = queue.pop_front() {
|
|
// Don't duplicate packages if they are dependended on a diamond pattern
|
|
// N.B. if this line is ommitted, we try to analyse over 4_800_000 crates
|
|
// which is not ideal
|
|
if rustc_pkg_crates.contains_key(&pkg) {
|
|
continue;
|
|
}
|
|
for dep in &rustc_workspace[pkg].dependencies {
|
|
queue.push_back(dep.pkg);
|
|
}
|
|
for &tgt in rustc_workspace[pkg].targets.iter() {
|
|
if rustc_workspace[tgt].kind != TargetKind::Lib {
|
|
continue;
|
|
}
|
|
if let Some(file_id) = load(&rustc_workspace[tgt].root) {
|
|
let crate_id = add_target_crate_root(
|
|
crate_graph,
|
|
&rustc_workspace[pkg],
|
|
rustc_build_data_map.and_then(|it| it.get(&rustc_workspace[pkg].id)),
|
|
&cfg_options,
|
|
proc_macro_loader,
|
|
file_id,
|
|
);
|
|
pkg_to_lib_crate.insert(pkg, crate_id);
|
|
// Add dependencies on core / std / alloc for this crate
|
|
for (name, krate) in public_deps.iter() {
|
|
add_dep(crate_graph, crate_id, name.clone(), *krate);
|
|
}
|
|
rustc_pkg_crates.entry(pkg).or_insert_with(Vec::new).push(crate_id);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Now add a dep edge from all targets of upstream to the lib
|
|
// target of downstream.
|
|
for pkg in rustc_pkg_crates.keys().copied() {
|
|
for dep in rustc_workspace[pkg].dependencies.iter() {
|
|
let name = CrateName::new(&dep.name).unwrap();
|
|
if let Some(&to) = pkg_to_lib_crate.get(&dep.pkg) {
|
|
for &from in rustc_pkg_crates.get(&pkg).into_iter().flatten() {
|
|
add_dep(crate_graph, from, name.clone(), to);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Add a dependency on the rustc_private crates for all targets of each package
|
|
// which opts in
|
|
for dep in rustc_workspace.packages() {
|
|
let name = CrateName::normalize_dashes(&rustc_workspace[dep].name);
|
|
|
|
if let Some(&to) = pkg_to_lib_crate.get(&dep) {
|
|
for pkg in cargo.packages() {
|
|
let package = &cargo[pkg];
|
|
if !package.metadata.rustc_private {
|
|
continue;
|
|
}
|
|
for &from in pkg_crates.get(&pkg).into_iter().flatten() {
|
|
// Avoid creating duplicate dependencies
|
|
// This avoids the situation where `from` depends on e.g. `arrayvec`, but
|
|
// `rust_analyzer` thinks that it should use the one from the `rustcSource`
|
|
// instead of the one from `crates.io`
|
|
if !crate_graph[from].dependencies.iter().any(|d| d.name == name) {
|
|
add_dep(crate_graph, from, name.clone(), to);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn add_target_crate_root(
|
|
crate_graph: &mut CrateGraph,
|
|
pkg: &cargo_workspace::PackageData,
|
|
build_data: Option<&BuildData>,
|
|
cfg_options: &CfgOptions,
|
|
proc_macro_loader: &dyn Fn(&Path) -> Vec<ProcMacro>,
|
|
file_id: FileId,
|
|
) -> CrateId {
|
|
let edition = pkg.edition;
|
|
let cfg_options = {
|
|
let mut opts = cfg_options.clone();
|
|
for feature in pkg.active_features.iter() {
|
|
opts.insert_key_value("feature".into(), feature.into());
|
|
}
|
|
if let Some(cfgs) = build_data.as_ref().map(|it| &it.cfgs) {
|
|
opts.extend(cfgs.iter().cloned());
|
|
}
|
|
opts
|
|
};
|
|
|
|
let mut env = Env::default();
|
|
if let Some(envs) = build_data.map(|it| &it.envs) {
|
|
for (k, v) in envs {
|
|
env.set(k, v.clone());
|
|
}
|
|
}
|
|
|
|
let proc_macro = build_data
|
|
.as_ref()
|
|
.and_then(|it| it.proc_macro_dylib_path.as_ref())
|
|
.map(|it| proc_macro_loader(&it))
|
|
.unwrap_or_default();
|
|
|
|
let display_name = CrateDisplayName::from_canonical_name(pkg.name.clone());
|
|
let crate_id = crate_graph.add_crate_root(
|
|
file_id,
|
|
edition,
|
|
Some(display_name),
|
|
cfg_options,
|
|
env,
|
|
proc_macro,
|
|
);
|
|
|
|
crate_id
|
|
}
|
|
|
|
fn sysroot_to_crate_graph(
|
|
crate_graph: &mut CrateGraph,
|
|
sysroot: &Sysroot,
|
|
rustc_cfg: Vec<CfgFlag>,
|
|
load: &mut dyn FnMut(&AbsPath) -> Option<FileId>,
|
|
) -> (Vec<(CrateName, CrateId)>, Option<CrateId>) {
|
|
let _p = profile::span("sysroot_to_crate_graph");
|
|
let mut cfg_options = CfgOptions::default();
|
|
cfg_options.extend(rustc_cfg);
|
|
let sysroot_crates: FxHashMap<SysrootCrate, CrateId> = sysroot
|
|
.crates()
|
|
.filter_map(|krate| {
|
|
let file_id = load(&sysroot[krate].root)?;
|
|
|
|
let env = Env::default();
|
|
let proc_macro = vec![];
|
|
let display_name = CrateDisplayName::from_canonical_name(sysroot[krate].name.clone());
|
|
let crate_id = crate_graph.add_crate_root(
|
|
file_id,
|
|
Edition::Edition2018,
|
|
Some(display_name),
|
|
cfg_options.clone(),
|
|
env,
|
|
proc_macro,
|
|
);
|
|
Some((krate, crate_id))
|
|
})
|
|
.collect();
|
|
|
|
for from in sysroot.crates() {
|
|
for &to in sysroot[from].deps.iter() {
|
|
let name = CrateName::new(&sysroot[to].name).unwrap();
|
|
if let (Some(&from), Some(&to)) = (sysroot_crates.get(&from), sysroot_crates.get(&to)) {
|
|
add_dep(crate_graph, from, name, to);
|
|
}
|
|
}
|
|
}
|
|
|
|
let public_deps = sysroot
|
|
.public_deps()
|
|
.map(|(name, idx)| (CrateName::new(name).unwrap(), sysroot_crates[&idx]))
|
|
.collect::<Vec<_>>();
|
|
|
|
let libproc_macro = sysroot.proc_macro().and_then(|it| sysroot_crates.get(&it).copied());
|
|
(public_deps, libproc_macro)
|
|
}
|
|
|
|
fn add_dep(graph: &mut CrateGraph, from: CrateId, name: CrateName, to: CrateId) {
|
|
if let Err(err) = graph.add_dep(from, name, to) {
|
|
log::error!("{}", err)
|
|
}
|
|
}
|