Crate bootstrap

Implementation of bootstrap, the Rust build system.

This module, and its descendants, are the implementation of the Rust build system. Most of this build system is backed by Cargo but the outer layer here serves as the ability to orchestrate calling Cargo, sequencing Cargo builds, building artifacts like LLVM, etc. The goals of bootstrap are:

• To be an easily understandable, easily extensible, and maintainable build system.
• Leverage standard tools in the Rust ecosystem to build the compiler, aka crates.io and Cargo.
• A standard interface to build across all platforms, including MSVC

Further information

More documentation can be found in each respective module below, and you can also check out the src/bootstrap/README.md file for more information.

Modules

• core 🔒
• utils 🔒
  This module contains integral components of the build and configuration process, providing support for a wide range of tasks and operations such as caching, tarballs, release channels, job management, etc.

Macros

• forward 🔒
• t
  A helper macro to unwrap a result except also print out details like:

Structs

• Build
  Global configuration for the build system.
• Compiler
  A structure representing a Rust compiler.
• Config
  Global configuration for the entire build and/or bootstrap.
• Crate 🔒
• Flags
  Deserialized version of all flags for this compile.

Enums

• CLang
• DependencyType
  When building Rust various objects are handled differently.
• DocTests
• GitRepo
• Mode
  The various “modes” of invoking Cargo.
• PathSet
  Collection of paths used to match a task rule.
• Subcommand

Constants

• CONFIG_CHANGE_HISTORY
  Keeps track of major changes made to the bootstrap configuration.
• EXTRA_CHECK_CFGS 🔒
  Extra --check-cfg to add when building the compiler or tools (Mode restriction, config name, config values (if any))
• LLD_FILE_NAMES 🔒
  LLD file names for all flavors.
• LLVM_TOOLS 🔒

Functions

• chmod 🔒
• envify 🔒
• find_recent_config_change_ids
• generate_smart_stamp_hash
  Computes a hash representing the state of a repository/submodule and additional input.
• human_readable_changes
• prepare_behaviour_dump_dir
  Ensures that the behavior dump directory is properly initialized.