Reduce scope of deserialization

crates/ra_project_model/src/cargo_workspace.rs

@@ -13,7 +13,6 @@ use cargo_metadata::{BuildScript, CargoOpt, Message, MetadataCommand, PackageId}
 use ra_arena::{Arena, Idx};
 use ra_db::Edition;
 use rustc_hash::FxHashMap;
-use serde::Deserialize;
 
 /// `CargoWorkspace` represents the logical structure of, well, a Cargo
 /// workspace. It pretty closely mirrors `cargo metadata` output.
@@ -43,10 +42,8 @@ impl ops::Index<Target> for CargoWorkspace {
     }
 }
 
-// TODO: rename to CargoConfig, kill `rename_all`, kill serde dep?
-#[derive(Deserialize, Clone, Debug, PartialEq, Eq)]
-#[serde(rename_all = "camelCase", default)]
-pub struct CargoFeatures {
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct CargoConfig {
     /// Do not activate the `default` feature.
     pub no_default_features: bool,
 
@@ -61,9 +58,9 @@ pub struct CargoFeatures {
     pub load_out_dirs_from_check: bool,
 }
 
-impl Default for CargoFeatures {
+impl Default for CargoConfig {
     fn default() -> Self {
-        CargoFeatures {
+        CargoConfig {
             no_default_features: false,
             all_features: true,
             features: Vec::new(),
@@ -142,7 +139,7 @@ impl PackageData {
 impl CargoWorkspace {
     pub fn from_cargo_metadata(
         cargo_toml: &Path,
-        cargo_features: &CargoFeatures,
+        cargo_features: &CargoConfig,
     ) -> Result<CargoWorkspace> {
         let mut meta = MetadataCommand::new();
         meta.manifest_path(cargo_toml);
@@ -276,7 +273,7 @@ pub struct ExternResources {
 
 pub fn load_extern_resources(
     cargo_toml: &Path,
-    cargo_features: &CargoFeatures,
+    cargo_features: &CargoConfig,
 ) -> Result<ExternResources> {
     let mut cmd = Command::new(cargo_binary());
     cmd.args(&["check", "--message-format=json", "--manifest-path"]).arg(cargo_toml);
@@ -294,9 +291,8 @@ pub fn load_extern_resources(
 
     let mut res = ExternResources::default();
 
-    let stdout = String::from_utf8(output.stdout)?;
-    for line in stdout.lines() {
-        if let Ok(message) = serde_json::from_str::<cargo_metadata::Message>(&line) {
+    for message in cargo_metadata::parse_messages(output.stdout.as_slice()) {
+        if let Ok(message) = message {
             match message {
                 Message::BuildScriptExecuted(BuildScript { package_id, out_dir, .. }) => {
                     res.out_dirs.insert(package_id, out_dir);

crates/ra_project_model/src/lib.rs

@@ -19,7 +19,7 @@ use rustc_hash::FxHashMap;
 use serde_json::from_reader;
 
 pub use crate::{
-    cargo_workspace::{CargoFeatures, CargoWorkspace, Package, Target, TargetKind},
+    cargo_workspace::{CargoConfig, CargoWorkspace, Package, Target, TargetKind},
     json_project::JsonProject,
     sysroot::Sysroot,
 };
@@ -78,14 +78,14 @@ impl PackageRoot {
 }
 
 impl ProjectWorkspace {
-    pub fn discover(path: &Path, cargo_features: &CargoFeatures) -> Result<ProjectWorkspace> {
+    pub fn discover(path: &Path, cargo_features: &CargoConfig) -> Result<ProjectWorkspace> {
         ProjectWorkspace::discover_with_sysroot(path, true, cargo_features)
     }
 
     pub fn discover_with_sysroot(
         path: &Path,
         with_sysroot: bool,
-        cargo_features: &CargoFeatures,
+        cargo_features: &CargoConfig,
     ) -> Result<ProjectWorkspace> {
         match find_rust_project_json(path) {
             Some(json_path) => {

crates/rust-analyzer/src/bin/main.rs

@@ -4,7 +4,6 @@
 mod args;
 
 use lsp_server::Connection;
-
 use rust_analyzer::{cli, config::Config, from_json, Result};
 
 use crate::args::HelpPrinted;

crates/rust-analyzer/src/cli/load_cargo.rs

@@ -8,7 +8,7 @@ use crossbeam_channel::{unbounded, Receiver};
 use ra_db::{ExternSourceId, FileId, SourceRootId};
 use ra_ide::{AnalysisChange, AnalysisHost};
 use ra_project_model::{
-    get_rustc_cfg_options, CargoFeatures, PackageRoot, ProcMacroClient, ProjectWorkspace,
+    get_rustc_cfg_options, CargoConfig, PackageRoot, ProcMacroClient, ProjectWorkspace,
 };
 use ra_vfs::{RootEntry, Vfs, VfsChange, VfsTask, Watch};
 use rustc_hash::{FxHashMap, FxHashSet};
@@ -29,7 +29,7 @@ pub(crate) fn load_cargo(
     let root = std::env::current_dir()?.join(root);
     let ws = ProjectWorkspace::discover(
         root.as_ref(),
-        &CargoFeatures { load_out_dirs_from_check, ..Default::default() },
+        &CargoConfig { load_out_dirs_from_check, ..Default::default() },
     )?;
 
     let mut extern_dirs = FxHashSet::default();

crates/rust-analyzer/src/config.rs

@@ -10,7 +10,7 @@
 use lsp_types::TextDocumentClientCapabilities;
 use ra_flycheck::FlycheckConfig;
 use ra_ide::{CompletionConfig, InlayHintsConfig};
-use ra_project_model::CargoFeatures;
+use ra_project_model::CargoConfig;
 use serde::Deserialize;
 
 #[derive(Debug, Clone)]
@@ -29,7 +29,7 @@ pub struct Config {
     pub lru_capacity: Option<usize>,
     pub use_client_watching: bool,
     pub exclude_globs: Vec<String>,
-    pub cargo: CargoFeatures,
+    pub cargo: CargoConfig,
     pub with_sysroot: bool,
 }
 
@@ -92,7 +92,7 @@ impl Default for Config {
             lru_capacity: None,
             use_client_watching: false,
             exclude_globs: Vec::new(),
-            cargo: CargoFeatures::default(),
+            cargo: CargoConfig::default(),
             with_sysroot: true,
         }
     }