From 4dfda64b39cc47ac75280461f46e121958990fca Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Fri, 13 Nov 2020 17:38:26 +0100
Subject: Cleanup workspace loading a tiny bit

---
 crates/project_model/src/cargo_workspace.rs | 20 ++++++++++-------
 crates/project_model/src/workspace.rs       | 34 ++++++++++++++---------------
 2 files changed, 28 insertions(+), 26 deletions(-)

(limited to 'crates/project_model')

diff --git a/crates/project_model/src/cargo_workspace.rs b/crates/project_model/src/cargo_workspace.rs
index 608a031d4..540b57ae4 100644
--- a/crates/project_model/src/cargo_workspace.rs
+++ b/crates/project_model/src/cargo_workspace.rs
@@ -65,6 +65,10 @@ pub struct CargoConfig {
     /// rustc target
     pub target: Option<String>,
 
+    /// Don't load sysroot crates (`std`, `core` & friends). Might be useful
+    /// when debugging isolated issues.
+    pub no_sysroot: bool,
+
     /// rustc private crate source
     pub rustc_source: Option<AbsPathBuf>,
 }
@@ -140,27 +144,27 @@ impl PackageData {
 impl CargoWorkspace {
     pub fn from_cargo_metadata(
         cargo_toml: &AbsPath,
-        cargo_features: &CargoConfig,
+        config: &CargoConfig,
     ) -> Result<CargoWorkspace> {
         let mut meta = MetadataCommand::new();
         meta.cargo_path(toolchain::cargo());
         meta.manifest_path(cargo_toml.to_path_buf());
-        if cargo_features.all_features {
+        if config.all_features {
             meta.features(CargoOpt::AllFeatures);
         } else {
-            if cargo_features.no_default_features {
+            if config.no_default_features {
                 // FIXME: `NoDefaultFeatures` is mutual exclusive with `SomeFeatures`
                 // https://github.com/oli-obk/cargo_metadata/issues/79
                 meta.features(CargoOpt::NoDefaultFeatures);
             }
-            if !cargo_features.features.is_empty() {
-                meta.features(CargoOpt::SomeFeatures(cargo_features.features.clone()));
+            if !config.features.is_empty() {
+                meta.features(CargoOpt::SomeFeatures(config.features.clone()));
             }
         }
         if let Some(parent) = cargo_toml.parent() {
             meta.current_dir(parent.to_path_buf());
         }
-        if let Some(target) = cargo_features.target.as_ref() {
+        if let Some(target) = config.target.as_ref() {
             meta.other_options(vec![String::from("--filter-platform"), target.clone()]);
         }
         let mut meta = meta.exec().with_context(|| {
@@ -170,8 +174,8 @@ impl CargoWorkspace {
         let mut out_dir_by_id = FxHashMap::default();
         let mut cfgs = FxHashMap::default();
         let mut proc_macro_dylib_paths = FxHashMap::default();
-        if cargo_features.load_out_dirs_from_check {
-            let resources = load_extern_resources(cargo_toml, cargo_features)?;
+        if config.load_out_dirs_from_check {
+            let resources = load_extern_resources(cargo_toml, config)?;
             out_dir_by_id = resources.out_dirs;
             cfgs = resources.cfgs;
             proc_macro_dylib_paths = resources.proc_dylib_paths;
diff --git a/crates/project_model/src/workspace.rs b/crates/project_model/src/workspace.rs
index 43ea351d1..8a1a60e0e 100644
--- a/crates/project_model/src/workspace.rs
+++ b/crates/project_model/src/workspace.rs
@@ -1,3 +1,7 @@
+//! Handles lowering of build-system specific workspace information (`cargo
+//! metadata` or `rust-project.json`) into representation stored in the salsa
+//! database -- `CrateGraph`.
+
 use std::{fmt, fs, path::Component, process::Command};
 
 use anyhow::{Context, Result};
@@ -56,11 +60,7 @@ impl fmt::Debug for ProjectWorkspace {
 }
 
 impl ProjectWorkspace {
-    pub fn load(
-        manifest: ProjectManifest,
-        cargo_config: &CargoConfig,
-        with_sysroot: bool,
-    ) -> Result<ProjectWorkspace> {
+    pub fn load(manifest: ProjectManifest, config: &CargoConfig) -> Result<ProjectWorkspace> {
         let res = match manifest {
             ProjectManifest::ProjectJson(project_json) => {
                 let file = fs::read_to_string(&project_json).with_context(|| {
@@ -84,32 +84,30 @@ impl ProjectWorkspace {
                     cmd
                 })?;
 
-                let cargo = CargoWorkspace::from_cargo_metadata(&cargo_toml, cargo_config)
-                    .with_context(|| {
+                let cargo = CargoWorkspace::from_cargo_metadata(&cargo_toml, config).with_context(
+                    || {
                         format!(
                             "Failed to read Cargo metadata from Cargo.toml file {}, {}",
                             cargo_toml.display(),
                             cargo_version
                         )
-                    })?;
-                let sysroot = if with_sysroot {
+                    },
+                )?;
+                let sysroot = if config.no_sysroot {
+                    Sysroot::default()
+                } else {
                     Sysroot::discover(&cargo_toml).with_context(|| {
                         format!(
                             "Failed to find sysroot for Cargo.toml file {}. Is rust-src installed?",
                             cargo_toml.display()
                         )
                     })?
-                } else {
-                    Sysroot::default()
                 };
 
-                let rustc = if let Some(rustc_dir) = &cargo_config.rustc_source {
-                    Some(
-                        CargoWorkspace::from_cargo_metadata(&rustc_dir, cargo_config)
-                            .with_context(|| {
-                                format!("Failed to read Cargo metadata for Rust sources")
-                            })?,
-                    )
+                let rustc = if let Some(rustc_dir) = &config.rustc_source {
+                    Some(CargoWorkspace::from_cargo_metadata(&rustc_dir, config).with_context(
+                        || format!("Failed to read Cargo metadata for Rust sources"),
+                    )?)
                 } else {
                     None
                 };
-- 
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