Allow sysroots to only consist of the source root dir

crates/hir-ty/src/layout/tests.rs

@@ -1,7 +1,7 @@
 use chalk_ir::{AdtId, TyKind};
 use either::Either;
 use hir_def::db::DefDatabase;
-use project_model::target_data_layout::RustcDataLayoutConfig;
+use project_model::{target_data_layout::RustcDataLayoutConfig, Sysroot};
 use rustc_hash::FxHashMap;
 use test_fixture::WithFixture;
 use triomphe::Arc;
@@ -17,7 +17,7 @@ mod closure;
 
 fn current_machine_data_layout() -> String {
     project_model::target_data_layout::get(
-        RustcDataLayoutConfig::Rustc(None),
+        RustcDataLayoutConfig::Rustc(&Sysroot::empty()),
         None,
         &FxHashMap::default(),
     )

crates/project-model/src/build_scripts.rs

@@ -65,7 +65,7 @@ impl WorkspaceBuildScripts {
         allowed_features: &FxHashSet<String>,
         manifest_path: &ManifestPath,
         toolchain: Option<&Version>,
-        sysroot: Option<&Sysroot>,
+        sysroot: &Sysroot,
     ) -> io::Result<Command> {
         const RUST_1_75: Version = Version::new(1, 75, 0);
         let mut cmd = match config.run_build_script_command.as_deref() {
@@ -75,7 +75,7 @@ impl WorkspaceBuildScripts {
                 cmd
             }
             _ => {
-                let mut cmd = Sysroot::tool(sysroot, Tool::Cargo);
+                let mut cmd = sysroot.tool(Tool::Cargo);
 
                 cmd.args(["check", "--quiet", "--workspace", "--message-format=json"]);
                 cmd.args(&config.extra_args);
@@ -149,7 +149,7 @@ impl WorkspaceBuildScripts {
         workspace: &CargoWorkspace,
         progress: &dyn Fn(String),
         toolchain: Option<&Version>,
-        sysroot: Option<&Sysroot>,
+        sysroot: &Sysroot,
     ) -> io::Result<WorkspaceBuildScripts> {
         let current_dir = match &config.invocation_location {
             InvocationLocation::Root(root) if config.run_build_script_command.is_some() => {
@@ -195,7 +195,7 @@ impl WorkspaceBuildScripts {
             // This is not gonna be used anyways, so just construct a dummy here
             &ManifestPath::try_from(workspace_root.clone()).unwrap(),
             None,
-            None,
+            &Sysroot::empty(),
         )?;
         // NB: Cargo.toml could have been modified between `cargo metadata` and
         // `cargo check`. We shouldn't assume that package ids we see here are
@@ -412,15 +412,15 @@ impl WorkspaceBuildScripts {
         rustc: &CargoWorkspace,
         current_dir: &AbsPath,
         extra_env: &FxHashMap<String, String>,
-        sysroot: Option<&Sysroot>,
+        sysroot: &Sysroot,
     ) -> Self {
         let mut bs = WorkspaceBuildScripts::default();
         for p in rustc.packages() {
             bs.outputs.insert(p, BuildScriptOutput::default());
         }
         let res = (|| {
             let target_libdir = (|| {
-                let mut cargo_config = Sysroot::tool(sysroot, Tool::Cargo);
+                let mut cargo_config = sysroot.tool(Tool::Cargo);
                 cargo_config.envs(extra_env);
                 cargo_config
                     .current_dir(current_dir)
@@ -429,7 +429,7 @@ impl WorkspaceBuildScripts {
                 if let Ok(it) = utf8_stdout(cargo_config) {
                     return Ok(it);
                 }
-                let mut cmd = Sysroot::tool(sysroot, Tool::Rustc);
+                let mut cmd = sysroot.tool(Tool::Rustc);
                 cmd.envs(extra_env);
                 cmd.args(["--print", "target-libdir"]);
                 utf8_stdout(cmd)

crates/project-model/src/cargo_workspace.rs

@@ -258,12 +258,12 @@ impl CargoWorkspace {
         cargo_toml: &ManifestPath,
         current_dir: &AbsPath,
         config: &CargoConfig,
-        sysroot: Option<&Sysroot>,
+        sysroot: &Sysroot,
         progress: &dyn Fn(String),
     ) -> anyhow::Result<cargo_metadata::Metadata> {
         let targets = find_list_of_build_targets(config, cargo_toml, sysroot);
 
-        let cargo = Sysroot::tool(sysroot, Tool::Cargo);
+        let cargo = sysroot.tool(Tool::Cargo);
         let mut meta = MetadataCommand::new();
         meta.cargo_path(cargo.get_program());
         cargo.get_envs().for_each(|(var, val)| _ = meta.env(var, val.unwrap_or_default()));
@@ -536,7 +536,7 @@ impl CargoWorkspace {
 fn find_list_of_build_targets(
     config: &CargoConfig,
     cargo_toml: &ManifestPath,
-    sysroot: Option<&Sysroot>,
+    sysroot: &Sysroot,
 ) -> Vec<String> {
     if let Some(target) = &config.target {
         return [target.into()].to_vec();
@@ -553,9 +553,9 @@ fn find_list_of_build_targets(
 fn rustc_discover_host_triple(
     cargo_toml: &ManifestPath,
     extra_env: &FxHashMap<String, String>,
-    sysroot: Option<&Sysroot>,
+    sysroot: &Sysroot,
 ) -> Option<String> {
-    let mut rustc = Sysroot::tool(sysroot, Tool::Rustc);
+    let mut rustc = sysroot.tool(Tool::Rustc);
     rustc.envs(extra_env);
     rustc.current_dir(cargo_toml.parent()).arg("-vV");
     tracing::debug!("Discovering host platform by {:?}", rustc);
@@ -581,9 +581,9 @@ fn rustc_discover_host_triple(
 fn cargo_config_build_target(
     cargo_toml: &ManifestPath,
     extra_env: &FxHashMap<String, String>,
-    sysroot: Option<&Sysroot>,
+    sysroot: &Sysroot,
 ) -> Vec<String> {
-    let mut cargo_config = Sysroot::tool(sysroot, Tool::Cargo);
+    let mut cargo_config = sysroot.tool(Tool::Cargo);
     cargo_config.envs(extra_env);
     cargo_config
         .current_dir(cargo_toml.parent())

crates/project-model/src/env.rs

@@ -62,9 +62,9 @@ pub(crate) fn inject_rustc_tool_env(env: &mut Env, cargo_name: &str, kind: Targe
 pub(crate) fn cargo_config_env(
     manifest: &ManifestPath,
     extra_env: &FxHashMap<String, String>,
-    sysroot: Option<&Sysroot>,
+    sysroot: &Sysroot,
 ) -> FxHashMap<String, String> {
-    let mut cargo_config = Sysroot::tool(sysroot, Tool::Cargo);
+    let mut cargo_config = sysroot.tool(Tool::Cargo);
     cargo_config.envs(extra_env);
     cargo_config
         .current_dir(manifest.parent())

crates/project-model/src/rustc_cfg.rs

@@ -10,10 +10,10 @@ use crate::{cfg::CfgFlag, utf8_stdout, ManifestPath, Sysroot};
 pub(crate) enum RustcCfgConfig<'a> {
     /// Use `rustc --print cfg`, either from with the binary from the sysroot or by discovering via
     /// [`toolchain::rustc`].
-    Rustc(Option<&'a Sysroot>),
+    Rustc(&'a Sysroot),
     /// Use `cargo --print cfg`, either from with the binary from the sysroot or by discovering via
     /// [`toolchain::cargo`].
-    Cargo(Option<&'a Sysroot>, &'a ManifestPath),
+    Cargo(&'a Sysroot, &'a ManifestPath),
 }
 
 pub(crate) fn get(
@@ -65,7 +65,7 @@ fn get_rust_cfgs(
 ) -> anyhow::Result<String> {
     let sysroot = match config {
         RustcCfgConfig::Cargo(sysroot, cargo_toml) => {
-            let mut cmd = Sysroot::tool(sysroot, Tool::Cargo);
+            let mut cmd = sysroot.tool(Tool::Cargo);
 
             cmd.envs(extra_env);
             cmd.current_dir(cargo_toml.parent())
@@ -86,7 +86,7 @@ fn get_rust_cfgs(
         RustcCfgConfig::Rustc(sysroot) => sysroot,
     };
 
-    let mut cmd = Sysroot::tool(sysroot, Tool::Rustc);
+    let mut cmd = sysroot.tool(Tool::Rustc);
     cmd.envs(extra_env);
     cmd.args(["--print", "cfg", "-O"]);
     if let Some(target) = target {