internal: Split serde derive feature into `serde_derive` usage

Ideally we'd not have any dependency pull in the derive feature for faster build times, once that is the case this change would have an actual effect.
See https://github.com/matklad/macro-dep-test/blob/master/README.md for context.

13 files changed, 19 insertions, 12 deletions

diff --git a/src/tools/rust-analyzer/crates/paths/Cargo.toml b/src/tools/rust-analyzer/crates/paths/Cargo.toml
index d4b0a54ed64..f0dafab70c1 100644
--- a/src/tools/rust-analyzer/crates/paths/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/paths/Cargo.toml
@@ -14,10 +14,9 @@ doctest = false
 
 [dependencies]
 camino.workspace = true
-serde = { workspace = true, optional = true }
 
 [features]
-serde1 = ["camino/serde1", "dep:serde"]
+serde1 = ["camino/serde1"]
 
 [lints]
 workspace = true
diff --git a/src/tools/rust-analyzer/crates/proc-macro-api/Cargo.toml b/src/tools/rust-analyzer/crates/proc-macro-api/Cargo.toml
index 911301e22b4..dac8e094357 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-api/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/proc-macro-api/Cargo.toml
@@ -14,6 +14,7 @@ doctest = false
 
 [dependencies]
 serde.workspace = true
+serde_derive.workspace = true
 serde_json = { workspace = true, features = ["unbounded_depth"] }
 tracing.workspace = true
 rustc-hash.workspace = true
diff --git a/src/tools/rust-analyzer/crates/proc-macro-api/src/msg.rs b/src/tools/rust-analyzer/crates/proc-macro-api/src/msg.rs
index 883528558d9..bbd9f582df9 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-api/src/msg.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-api/src/msg.rs
@@ -4,7 +4,8 @@ pub(crate) mod flat;
 use std::io::{self, BufRead, Write};
 
 use paths::Utf8PathBuf;
-use serde::{de::DeserializeOwned, Deserialize, Serialize};
+use serde::de::DeserializeOwned;
+use serde_derive::{Deserialize, Serialize};
 
 use crate::ProcMacroKind;
 
@@ -123,7 +124,7 @@ impl ExpnGlobals {
     }
 }
 
-pub trait Message: Serialize + DeserializeOwned {
+pub trait Message: serde::Serialize + DeserializeOwned {
     fn read<R: BufRead>(
         from_proto: ProtocolRead<R>,
         inp: &mut R,
diff --git a/src/tools/rust-analyzer/crates/proc-macro-api/src/msg/flat.rs b/src/tools/rust-analyzer/crates/proc-macro-api/src/msg/flat.rs
index af3412e90e4..5de1e59f280 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-api/src/msg/flat.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-api/src/msg/flat.rs
@@ -39,7 +39,7 @@ use std::collections::VecDeque;
 
 use intern::Symbol;
 use rustc_hash::FxHashMap;
-use serde::{Deserialize, Serialize};
+use serde_derive::{Deserialize, Serialize};
 use span::{EditionedFileId, ErasedFileAstId, Span, SpanAnchor, SyntaxContextId, TextRange};
 
 use crate::msg::EXTENDED_LEAF_DATA;
diff --git a/src/tools/rust-analyzer/crates/project-model/Cargo.toml b/src/tools/rust-analyzer/crates/project-model/Cargo.toml
index 68e0e1ba554..ed647950e66 100644
--- a/src/tools/rust-analyzer/crates/project-model/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/project-model/Cargo.toml
@@ -19,6 +19,7 @@ rustc-hash.workspace = true
 semver.workspace = true
 serde_json.workspace = true
 serde.workspace = true
+serde_derive.workspace = true
 tracing.workspace = true
 triomphe.workspace = true
 la-arena.workspace = true
diff --git a/src/tools/rust-analyzer/crates/project-model/src/build_dependencies.rs b/src/tools/rust-analyzer/crates/project-model/src/build_dependencies.rs
index dc71b13eeec..524323b9736 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/build_dependencies.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/build_dependencies.rs
@@ -15,7 +15,7 @@ use itertools::Itertools;
 use la_arena::ArenaMap;
 use paths::{AbsPath, AbsPathBuf, Utf8PathBuf};
 use rustc_hash::{FxHashMap, FxHashSet};
-use serde::Deserialize;
+use serde::Deserialize as _;
 use toolchain::Tool;
 
 use crate::{
diff --git a/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs b/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
index 4ae3426ed97..ba4946bf0b9 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
@@ -8,7 +8,7 @@ use cargo_metadata::{CargoOpt, MetadataCommand};
 use la_arena::{Arena, Idx};
 use paths::{AbsPath, AbsPathBuf, Utf8PathBuf};
 use rustc_hash::{FxHashMap, FxHashSet};
-use serde::Deserialize;
+use serde_derive::Deserialize;
 use serde_json::from_value;
 use span::Edition;
 use toolchain::Tool;
diff --git a/src/tools/rust-analyzer/crates/ra-salsa/Cargo.toml b/src/tools/rust-analyzer/crates/ra-salsa/Cargo.toml
index f8a3156fe40..57a20be0cad 100644
--- a/src/tools/rust-analyzer/crates/ra-salsa/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/ra-salsa/Cargo.toml
@@ -20,7 +20,7 @@ parking_lot = "0.12.1"
 rustc-hash = "2.0.0"
 smallvec = "1.0.0"
 oorandom = "11"
-triomphe = "0.1.11"
+triomphe.workspace = true
 itertools.workspace = true
 
 ra-salsa-macros = { version = "0.0.0", path = "ra-salsa-macros", package = "salsa-macros" }
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/Cargo.toml b/src/tools/rust-analyzer/crates/rust-analyzer/Cargo.toml
index 7c8610280b3..fa9ff6b56df 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/Cargo.toml
@@ -36,6 +36,7 @@ rayon.workspace = true
 rustc-hash.workspace = true
 serde_json = { workspace = true, features = ["preserve_order"] }
 serde.workspace = true
+serde_derive.workspace = true
 tenthash = "0.4.0"
 num_cpus = "1.15.0"
 mimalloc = { version = "0.1.30", default-features = false, optional = true }
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/flycheck.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/flycheck.rs
index b035d779a7d..f2ad4f081c4 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/flycheck.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/flycheck.rs
@@ -6,7 +6,8 @@ use std::{fmt, io, process::Command, time::Duration};
 use crossbeam_channel::{select_biased, unbounded, Receiver, Sender};
 use paths::{AbsPath, AbsPathBuf, Utf8PathBuf};
 use rustc_hash::FxHashMap;
-use serde::Deserialize;
+use serde::Deserialize as _;
+use serde_derive::Deserialize;
 
 pub(crate) use cargo_metadata::diagnostic::{
     Applicability, Diagnostic, DiagnosticCode, DiagnosticLevel, DiagnosticSpan,
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/test_runner.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/test_runner.rs
index 5e43a3c60d8..2fd52547336 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/test_runner.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/test_runner.rs
@@ -5,7 +5,8 @@ use std::process::Command;
 
 use crossbeam_channel::Sender;
 use paths::AbsPath;
-use serde::Deserialize;
+use serde::Deserialize as _;
+use serde_derive::Deserialize;
 use toolchain::Tool;
 
 use crate::{
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/tracing/json.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/tracing/json.rs
index f540a33b451..9e35990a5bc 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/tracing/json.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/tracing/json.rs
@@ -54,7 +54,7 @@ where
     fn on_event(&self, _event: &Event<'_>, _ctx: Context<'_, S>) {}
 
     fn on_close(&self, id: Id, ctx: Context<'_, S>) {
-        #[derive(serde::Serialize)]
+        #[derive(serde_derive::Serialize)]
         struct JsonDataInner {
             name: &'static str,
             elapsed_ms: u128,
diff --git a/src/tools/rust-analyzer/crates/span/src/lib.rs b/src/tools/rust-analyzer/crates/span/src/lib.rs
index e12575b9b15..20c3b087af5 100644
--- a/src/tools/rust-analyzer/crates/span/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/span/src/lib.rs
@@ -262,8 +262,9 @@ pub struct MacroFileId {
 /// `MacroCallId` identifies a particular macro invocation, like
 /// `println!("Hello, {}", world)`.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct MacroCallId(ra_salsa::InternId);
+pub struct MacroCallId(InternId);
 
+#[cfg(feature = "ra-salsa")]
 impl ra_salsa::InternKey for MacroCallId {
     fn from_intern_id(v: ra_salsa::InternId) -> Self {
         MacroCallId(v)
@@ -362,6 +363,7 @@ mod intern_id_proxy {
     use std::fmt;
     use std::num::NonZeroU32;
 
+    #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
     pub(super) struct InternId {
         value: NonZeroU32,
     }