Auto merge of #142816 - Shourya742:2025-06-21-add-caching-layer-to-bootstrap, r=Kobzol

Add caching layer to bootstrap

This PR adds a caching layer to the bootstrap command execution context. It is still a work in progress but introduces the initial infrastructure for it.

r? `@Kobzol`

Author: bors

src/bootstrap/src/core/builder/cargo.rs

@@ -131,7 +131,10 @@ impl Cargo {
     }
 
     pub fn into_cmd(self) -> BootstrapCommand {
-        self.into()
+        let mut cmd: BootstrapCommand = self.into();
+        // Disable caching for commands originating from Cargo-related operations.
+        cmd.do_not_cache();
+        cmd
     }
 
     /// Same as [`Cargo::new`] except this one doesn't configure the linker with

src/bootstrap/src/core/builder/mod.rs

@@ -22,8 +22,7 @@ use crate::core::build_steps::{
 use crate::core::config::flags::Subcommand;
 use crate::core::config::{DryRun, TargetSelection};
 use crate::utils::cache::Cache;
-use crate::utils::exec::{BootstrapCommand, command};
-use crate::utils::execution_context::ExecutionContext;
+use crate::utils::exec::{BootstrapCommand, ExecutionContext, command};
 use crate::utils::helpers::{self, LldThreads, add_dylib_path, exe, libdir, linker_args, t};
 use crate::{Build, Crate, trace};
 

src/bootstrap/src/core/config/config.rs

@@ -47,8 +47,7 @@ use crate::core::config::{
 };
 use crate::core::download::is_download_ci_available;
 use crate::utils::channel;
-use crate::utils::exec::command;
-use crate::utils::execution_context::ExecutionContext;
+use crate::utils::exec::{ExecutionContext, command};
 use crate::utils::helpers::{exe, get_host_target};
 use crate::{GitInfo, OnceLock, TargetSelection, check_ci_llvm, helpers, t};
 

src/bootstrap/src/lib.rs

@@ -31,12 +31,12 @@ use cc::Tool;
 use termcolor::{ColorChoice, StandardStream, WriteColor};
 use utils::build_stamp::BuildStamp;
 use utils::channel::GitInfo;
-use utils::execution_context::ExecutionContext;
+use utils::exec::ExecutionContext;
 
 use crate::core::builder;
 use crate::core::builder::Kind;
 use crate::core::config::{DryRun, LldMode, LlvmLibunwind, TargetSelection, flags};
-use crate::utils::exec::{BehaviorOnFailure, BootstrapCommand, CommandOutput, OutputMode, command};
+use crate::utils::exec::{BootstrapCommand, command};
 use crate::utils::helpers::{
     self, dir_is_empty, exe, libdir, set_file_times, split_debuginfo, symlink_dir,
 };

src/bootstrap/src/utils/channel.rs

@@ -8,7 +8,7 @@
 use std::fs;
 use std::path::Path;
 
-use super::execution_context::ExecutionContext;
+use super::exec::ExecutionContext;
 use super::helpers;
 use crate::Build;
 use crate::utils::helpers::t;