internal: Utilize `cargo check --compile-time-deps`
diff --git a/crates/project-model/src/build_dependencies.rs b/crates/project-model/src/build_dependencies.rs
index e0c38cc..4435376 100644
--- a/crates/project-model/src/build_dependencies.rs
+++ b/crates/project-model/src/build_dependencies.rs
@@ -20,7 +20,9 @@
use crate::{
CargoConfig, CargoFeatures, CargoWorkspace, InvocationStrategy, ManifestPath, Package, Sysroot,
- TargetKind, utf8_stdout,
+ TargetKind,
+ toolchain_info::{QueryConfig, version},
+ utf8_stdout,
};
/// Output of the build script and proc-macro building steps for a workspace.
@@ -446,10 +448,30 @@
}
};
- if config.wrap_rustc_in_build_scripts {
+ // If [`--compile-time-deps` flag](https://github.com/rust-lang/cargo/issues/14434) is
+ // available in current toolchain's cargo, use it to build compile time deps only.
+ const COMP_TIME_DEPS_MIN_TOOLCHAIN_VERSION: semver::Version = semver::Version {
+ major: 1,
+ minor: 90,
+ patch: 0,
+ pre: semver::Prerelease::EMPTY,
+ build: semver::BuildMetadata::EMPTY,
+ };
+
+ let query_config = QueryConfig::Cargo(sysroot, manifest_path);
+ let toolchain = version::get(query_config, &config.extra_env).ok().flatten();
+ let cargo_comp_time_deps_available =
+ toolchain.is_some_and(|v| v >= COMP_TIME_DEPS_MIN_TOOLCHAIN_VERSION);
+
+ if cargo_comp_time_deps_available {
+ cmd.env("__CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS", "nightly");
+ cmd.arg("-Zunstable-options");
+ cmd.arg("--compile-time-deps");
+ } else if config.wrap_rustc_in_build_scripts {
// Setup RUSTC_WRAPPER to point to `rust-analyzer` binary itself. We use
// that to compile only proc macros and build scripts during the initial
// `cargo check`.
+ // We don't need this if we are using `--compile-time-deps` flag.
let myself = std::env::current_exe()?;
cmd.env("RUSTC_WRAPPER", myself);
cmd.env("RA_RUSTC_WRAPPER", "1");
