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docs: Improve comments

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Orion Gonzalez 2025-02-17 22:19:32 +01:00
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commit 280bc1f68b
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src/cargo/ops/fix.rs
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@ -4,27 +4,27 @@
//! diagnostics with suggested fixes that can be applied to the files on the
//! filesystem, and validate that those changes didn't break anything.
//!
//! Cargo begins by launching a `LockServer` thread in the background to
//! Cargo begins by launching a [`LockServer`] thread in the background to
//! listen for network connections to coordinate locking when multiple targets
//! are built simultaneously. It ensures each package has only one fix running
//! at once.
//!
//! The `RustfixDiagnosticServer` is launched in a background thread (in
//! The [`RustfixDiagnosticServer`] is launched in a background thread (in
//! `JobQueue`) to listen for network connections to coordinate displaying
//! messages to the user on the console (so that multiple processes don't try
//! to print at the same time).
//!
//! Cargo begins a normal `cargo check` operation with itself set as a proxy
//! for rustc by setting `primary_unit_rustc` in the build config. When
//! for rustc by setting `BuildConfig::primary_unit_rustc` in the build config. When
//! cargo launches rustc to check a crate, it is actually launching itself.
//! The `FIX_ENV_INTERNAL` environment variable is set so that cargo knows it is in
//! fix-proxy-mode.
//! The `FIX_ENV_INTERNAL` environment variable is set to the value of the [`LockServer`]'s
//! address so that cargo knows it is in fix-proxy-mode.
//!
//! Each proxied cargo-as-rustc detects it is in fix-proxy-mode (via `FIX_ENV_INTERNAL`
//! environment variable in `main`) and does the following:
//!
//! - Acquire a lock from the `LockServer` from the master cargo process.
//! - Launches the real rustc (`rustfix_and_fix`), looking at the JSON output
//! - Acquire a lock from the [`LockServer`] from the master cargo process.
//! - Launches the real rustc ([`rustfix_and_fix`]), looking at the JSON output
//! for suggested fixes.
//! - Uses the `rustfix` crate to apply the suggestions to the files on the
//! file system.