Drop support for stitched sysroot

Author: darichey

crates/project-model/src/lib.rs

@@ -263,7 +263,6 @@ fn parse_cfg(s: &str) -> Result<cfg::CfgAtom, String> {
 pub enum RustSourceWorkspaceConfig {
     CargoMetadata(CargoMetadataConfig),
     Json(ProjectJson),
-    Stitched,
 }
 
 impl Default for RustSourceWorkspaceConfig {

crates/project-model/src/sysroot.rs

@@ -4,17 +4,10 @@
 //! but we can't process `.rlib` and need source code instead. The source code
 //! is typically installed with `rustup component add rust-src` command.
 
-use std::{
-    env, fs,
-    ops::{self, Not},
-    path::Path,
-    process::Command,
-};
+use std::{env, fs, ops::Not, path::Path, process::Command};
 
 use anyhow::{format_err, Result};
-use base_db::CrateName;
 use itertools::Itertools;
-use la_arena::{Arena, Idx};
 use paths::{AbsPath, AbsPathBuf, Utf8PathBuf};
 use rustc_hash::FxHashMap;
 use stdx::format_to;
@@ -37,58 +30,9 @@ pub struct Sysroot {
 pub enum RustLibSrcWorkspace {
     Workspace(CargoWorkspace),
     Json(ProjectJson),
-    Stitched(Stitched),
     Empty,
 }
 
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub struct Stitched {
-    crates: Arena<RustLibSrcCrateData>,
-}
-
-impl ops::Index<RustLibSrcCrate> for Stitched {
-    type Output = RustLibSrcCrateData;
-    fn index(&self, index: RustLibSrcCrate) -> &RustLibSrcCrateData {
-        &self.crates[index]
-    }
-}
-
-impl Stitched {
-    pub(crate) fn public_deps(
-        &self,
-    ) -> impl Iterator<Item = (CrateName, RustLibSrcCrate, bool)> + '_ {
-        // core is added as a dependency before std in order to
-        // mimic rustcs dependency order
-        [("core", true), ("alloc", false), ("std", true), ("test", false)].into_iter().filter_map(
-            move |(name, prelude)| {
-                Some((CrateName::new(name).unwrap(), self.by_name(name)?, prelude))
-            },
-        )
-    }
-
-    pub(crate) fn proc_macro(&self) -> Option<RustLibSrcCrate> {
-        self.by_name("proc_macro")
-    }
-
-    pub(crate) fn crates(&self) -> impl ExactSizeIterator<Item = RustLibSrcCrate> + '_ {
-        self.crates.iter().map(|(id, _data)| id)
-    }
-
-    fn by_name(&self, name: &str) -> Option<RustLibSrcCrate> {
-        let (id, _data) = self.crates.iter().find(|(_id, data)| data.name == name)?;
-        Some(id)
-    }
-}
-
-pub(crate) type RustLibSrcCrate = Idx<RustLibSrcCrateData>;
-
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub(crate) struct RustLibSrcCrateData {
-    pub(crate) name: String,
-    pub(crate) root: ManifestPath,
-    pub(crate) deps: Vec<RustLibSrcCrate>,
-}
-
 impl Sysroot {
     pub const fn empty() -> Sysroot {
         Sysroot {
@@ -116,7 +60,6 @@ impl Sysroot {
         match &self.workspace {
             RustLibSrcWorkspace::Workspace(ws) => ws.packages().next().is_none(),
             RustLibSrcWorkspace::Json(project_json) => project_json.n_crates() == 0,
-            RustLibSrcWorkspace::Stitched(stitched) => stitched.crates.is_empty(),
             RustLibSrcWorkspace::Empty => true,
         }
     }
@@ -129,7 +72,6 @@ impl Sysroot {
         match &self.workspace {
             RustLibSrcWorkspace::Workspace(ws) => ws.packages().count(),
             RustLibSrcWorkspace::Json(project_json) => project_json.n_crates(),
-            RustLibSrcWorkspace::Stitched(c) => c.crates().count(),
             RustLibSrcWorkspace::Empty => 0,
         }
     }
@@ -258,51 +200,8 @@ impl Sysroot {
         } else if let RustSourceWorkspaceConfig::Json(project_json) = sysroot_source_config {
             return Some(RustLibSrcWorkspace::Json(project_json.clone()));
         }
-        tracing::debug!("Stitching sysroot library: {src_root}");
-
-        let mut stitched = Stitched { crates: Arena::default() };
-
-        for path in SYSROOT_CRATES.trim().lines() {
-            let name = path.split('/').last().unwrap();
-            let root = [format!("{path}/src/lib.rs"), format!("lib{path}/lib.rs")]
-                .into_iter()
-                .map(|it| src_root.join(it))
-                .filter_map(|it| ManifestPath::try_from(it).ok())
-                .find(|it| fs::metadata(it).is_ok());
-
-            if let Some(root) = root {
-                stitched.crates.alloc(RustLibSrcCrateData {
-                    name: name.into(),
-                    root,
-                    deps: Vec::new(),
-                });
-            }
-        }
 
-        if let Some(std) = stitched.by_name("std") {
-            for dep in STD_DEPS.trim().lines() {
-                if let Some(dep) = stitched.by_name(dep) {
-                    stitched.crates[std].deps.push(dep)
-                }
-            }
-        }
-
-        if let Some(alloc) = stitched.by_name("alloc") {
-            for dep in ALLOC_DEPS.trim().lines() {
-                if let Some(dep) = stitched.by_name(dep) {
-                    stitched.crates[alloc].deps.push(dep)
-                }
-            }
-        }
-
-        if let Some(proc_macro) = stitched.by_name("proc_macro") {
-            for dep in PROC_MACRO_DEPS.trim().lines() {
-                if let Some(dep) = stitched.by_name(dep) {
-                    stitched.crates[proc_macro].deps.push(dep)
-                }
-            }
-        }
-        Some(RustLibSrcWorkspace::Stitched(stitched))
+        return None;
     }
 
     pub fn set_workspace(&mut self, workspace: RustLibSrcWorkspace) {
@@ -317,7 +216,6 @@ impl Sysroot {
                         .crates()
                         .filter_map(|(_, krate)| krate.display_name.clone())
                         .any(|name| name.canonical_name().as_str() == "core"),
-                    RustLibSrcWorkspace::Stitched(stitched) => stitched.by_name("core").is_some(),
                     RustLibSrcWorkspace::Empty => true,
                 };
                 if !has_core {
@@ -493,33 +391,3 @@ fn get_rust_lib_src(sysroot_path: &AbsPath) -> Option<AbsPathBuf> {
         None
     }
 }
-
-const SYSROOT_CRATES: &str = "
-alloc
-backtrace
-core
-panic_abort
-panic_unwind
-proc_macro
-profiler_builtins
-std
-stdarch/crates/std_detect
-test
-unwind";
-
-const ALLOC_DEPS: &str = "core";
-
-const STD_DEPS: &str = "
-alloc
-panic_unwind
-panic_abort
-core
-profiler_builtins
-unwind
-std_detect
-test";
-
-// core is required for our builtin derives to work in the proc_macro lib currently
-const PROC_MACRO_DEPS: &str = "
-std
-core";

crates/project-model/src/tests.rs

@@ -1,5 +1,3 @@
-use std::ops::Deref;
-
 use base_db::{CrateGraph, ProcMacroPaths};
 use cargo_metadata::Metadata;
 use cfg::{CfgAtom, CfgDiff};
@@ -225,18 +223,6 @@ fn rust_project_cfg_groups() {
     check_crate_graph(crate_graph, expect_file!["../test_data/output/rust_project_cfg_groups.txt"]);
 }
 
-#[test]
-fn rust_project_is_proc_macro_has_proc_macro_dep() {
-    let (crate_graph, _proc_macros) = load_rust_project("is-proc-macro-project.json");
-    // Since the project only defines one crate (outside the sysroot crates),
-    // it should be the one with the biggest Id.
-    let crate_id = crate_graph.iter().max().unwrap();
-    let crate_data = &crate_graph[crate_id];
-    // Assert that the project crate with `is_proc_macro` has a dependency
-    // on the proc_macro sysroot crate.
-    crate_data.dependencies.iter().find(|&dep| *dep.name.deref() == sym::proc_macro).unwrap();
-}
-
 #[test]
 fn crate_graph_dedup_identical() {
     let (mut crate_graph, proc_macros) = load_cargo("regex-metadata.json");

crates/project-model/src/workspace.rs

@@ -23,7 +23,7 @@ use crate::{
     cargo_workspace::{CargoMetadataConfig, DepKind, PackageData, RustLibSource},
     env::{cargo_config_env, inject_cargo_env, inject_cargo_package_env, inject_rustc_tool_env},
     project_json::{Crate, CrateArrayIdx},
-    sysroot::{RustLibSrcCrate, RustLibSrcWorkspace},
+    sysroot::RustLibSrcWorkspace,
     toolchain_info::{rustc_cfg, target_data_layout, target_tuple, version, QueryConfig},
     CargoConfig, CargoWorkspace, CfgOverrides, InvocationStrategy, ManifestPath, Package,
     ProjectJson, ProjectManifest, RustSourceWorkspaceConfig, Sysroot, TargetData, TargetKind,
@@ -436,7 +436,9 @@ impl ProjectWorkspace {
                 if let Some(sysroot_project) = sysroot_project {
                     sysroot.load_workspace(&RustSourceWorkspaceConfig::Json(*sysroot_project))
                 } else {
-                    sysroot.load_workspace(&RustSourceWorkspaceConfig::Stitched)
+                    sysroot.load_workspace(&RustSourceWorkspaceConfig::CargoMetadata(
+                        sysroot_metadata_config(&config.extra_env, &targets),
+                    ))
                 }
             });
 
@@ -689,7 +691,7 @@ impl ProjectWorkspace {
                         exclude: krate.exclude.clone(),
                     })
                     .collect(),
-                RustLibSrcWorkspace::Stitched(_) | RustLibSrcWorkspace::Empty => vec![],
+                RustLibSrcWorkspace::Empty => vec![],
             };
 
             r.push(PackageRoot {
@@ -1626,60 +1628,7 @@ fn sysroot_to_crate_graph(
 
             extend_crate_graph_with_sysroot(crate_graph, cg, pm)
         }
-        RustLibSrcWorkspace::Stitched(stitched) => {
-            let cfg_options = Arc::new({
-                let mut cfg_options = CfgOptions::default();
-                cfg_options.extend(rustc_cfg);
-                cfg_options.insert_atom(sym::debug_assertions.clone());
-                cfg_options.insert_atom(sym::miri.clone());
-                cfg_options
-            });
-            let sysroot_crates: FxHashMap<RustLibSrcCrate, CrateId> = stitched
-                .crates()
-                .filter_map(|krate| {
-                    let file_id = load(&stitched[krate].root)?;
-
-                    let display_name = CrateDisplayName::from_canonical_name(&stitched[krate].name);
-                    let crate_id = crate_graph.add_crate_root(
-                        file_id,
-                        Edition::CURRENT_FIXME,
-                        Some(display_name),
-                        None,
-                        cfg_options.clone(),
-                        None,
-                        Env::default(),
-                        CrateOrigin::Lang(LangCrateOrigin::from(&*stitched[krate].name)),
-                        false,
-                        None,
-                    );
-                    Some((krate, crate_id))
-                })
-                .collect();
-
-            for from in stitched.crates() {
-                for &to in stitched[from].deps.iter() {
-                    let name = CrateName::new(&stitched[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 = SysrootPublicDeps {
-                deps: stitched
-                    .public_deps()
-                    .filter_map(|(name, idx, prelude)| {
-                        Some((name, *sysroot_crates.get(&idx)?, prelude))
-                    })
-                    .collect::<Vec<_>>(),
-            };
-
-            let libproc_macro =
-                stitched.proc_macro().and_then(|it| sysroot_crates.get(&it).copied());
-            (public_deps, libproc_macro)
-        }
         RustLibSrcWorkspace::Empty => (SysrootPublicDeps { deps: vec![] }, None),
     }
 }