1 //! Implementation of rustbuild, the Rust build system.
3 //! This module, and its descendants, are the implementation of the Rust build
4 //! system. Most of this build system is backed by Cargo but the outer layer
5 //! here serves as the ability to orchestrate calling Cargo, sequencing Cargo
6 //! builds, building artifacts like LLVM, etc. The goals of rustbuild are:
8 //! * To be an easily understandable, easily extensible, and maintainable build
10 //! * Leverage standard tools in the Rust ecosystem to build the compiler, aka
11 //! crates.io and Cargo.
12 //! * A standard interface to build across all platforms, including MSVC
16 //! The build system defers most of the complicated logic managing invocations
17 //! of rustc and rustdoc to Cargo itself. However, moving through various stages
18 //! and copying artifacts is still necessary for it to do. Each time rustbuild
19 //! is invoked, it will iterate through the list of predefined steps and execute
20 //! each serially in turn if it matches the paths passed or is a default rule.
21 //! For each step rustbuild relies on the step internally being incremental and
22 //! parallel. Note, though, that the `-j` parameter to rustbuild gets forwarded
23 //! to appropriate test harnesses and such.
25 //! Most of the "meaty" steps that matter are backed by Cargo, which does indeed
26 //! have its own parallelism and incremental management. Later steps, like
27 //! tests, aren't incremental and simply run the entire suite currently.
28 //! However, compiletest itself tries to avoid running tests when the artifacts
29 //! that are involved (mainly the compiler) haven't changed.
31 //! When you execute `x.py build`, the steps executed are:
33 //! * First, the python script is run. This will automatically download the
34 //! stage0 rustc and cargo according to `src/stage0.json`, or use the cached
35 //! versions if they're available. These are then used to compile rustbuild
36 //! itself (using Cargo). Finally, control is then transferred to rustbuild.
38 //! * Rustbuild takes over, performs sanity checks, probes the environment,
39 //! reads configuration, and starts executing steps as it reads the command
40 //! line arguments (paths) or going through the default rules.
42 //! The build output will be something like the following:
44 //! Building stage0 std artifacts
45 //! Copying stage0 std
46 //! Building stage0 test artifacts
47 //! Copying stage0 test
48 //! Building stage0 compiler artifacts
49 //! Copying stage0 rustc
50 //! Assembling stage1 compiler
51 //! Building stage1 std artifacts
52 //! Copying stage1 std
53 //! Building stage1 test artifacts
54 //! Copying stage1 test
55 //! Building stage1 compiler artifacts
56 //! Copying stage1 rustc
57 //! Assembling stage2 compiler
58 //! Uplifting stage1 std
59 //! Uplifting stage1 test
60 //! Uplifting stage1 rustc
62 //! Let's disect that a little:
64 //! ## Building stage0 {std,test,compiler} artifacts
66 //! These steps use the provided (downloaded, usually) compiler to compile the
67 //! local Rust source into libraries we can use.
69 //! ## Copying stage0 {std,test,rustc}
71 //! This copies the build output from Cargo into
72 //! `build/$HOST/stage0-sysroot/lib/rustlib/$ARCH/lib`. FIXME: this step's
73 //! documentation should be expanded -- the information already here may be
76 //! ## Assembling stage1 compiler
78 //! This copies the libraries we built in "building stage0 ... artifacts" into
79 //! the stage1 compiler's lib directory. These are the host libraries that the
80 //! compiler itself uses to run. These aren't actually used by artifacts the new
81 //! compiler generates. This step also copies the rustc and rustdoc binaries we
82 //! generated into build/$HOST/stage/bin.
84 //! The stage1/bin/rustc is a fully functional compiler, but it doesn't yet have
85 //! any libraries to link built binaries or libraries to. The next 3 steps will
86 //! provide those libraries for it; they are mostly equivalent to constructing
87 //! the stage1/bin compiler so we don't go through them individually.
89 //! ## Uplifting stage1 {std,test,rustc}
91 //! This step copies the libraries from the stage1 compiler sysroot into the
92 //! stage2 compiler. This is done to avoid rebuilding the compiler; libraries
93 //! we'd build in this step should be identical (in function, if not necessarily
94 //! identical on disk) so there's no need to recompile the compiler again. Note
95 //! that if you want to, you can enable the full-bootstrap option to change this
98 //! Each step is driven by a separate Cargo project and rustbuild orchestrates
99 //! copying files between steps and otherwise preparing for Cargo to run.
101 //! ## Further information
103 //! More documentation can be found in each respective module below, and you can
104 //! also check out the `src/bootstrap/README.md` file for more information.
106 use std::cell::{Cell, RefCell};
107 use std::collections::{HashMap, HashSet};
109 use std::fs::{self, File};
111 use std::path::{Path, PathBuf};
112 use std::process::Command;
115 use config::{DryRun, Target};
116 use filetime::FileTime;
117 use once_cell::sync::OnceCell;
119 use crate::builder::Kind;
120 use crate::config::{LlvmLibunwind, TargetSelection};
122 check_run, exe, libdir, mtime, output, run, run_suppressed, try_run, try_run_suppressed, CiEnv,
150 #[cfg(feature = "build-metrics")]
156 #[cfg(all(unix, not(target_os = "haiku")))]
158 pub unsafe fn setup(build: &mut crate::Build) {
159 if build.config.low_priority {
160 libc::setpriority(libc::PRIO_PGRP as _, 0, 10);
165 #[cfg(any(target_os = "haiku", target_os = "hermit", not(any(unix, windows))))]
167 pub unsafe fn setup(_build: &mut crate::Build) {}
170 pub use crate::builder::PathSet;
171 use crate::cache::{Interned, INTERNER};
172 pub use crate::config::Config;
173 pub use crate::flags::Subcommand;
175 const LLVM_TOOLS: &[&str] = &[
176 "llvm-cov", // used to generate coverage report
177 "llvm-nm", // used to inspect binaries; it shows symbol names, their sizes and visibility
178 "llvm-objcopy", // used to transform ELFs into binary format which flashing tools consume
179 "llvm-objdump", // used to disassemble programs
180 "llvm-profdata", // used to inspect and merge files generated by profiles
181 "llvm-readobj", // used to get information from ELFs/objects that the other tools don't provide
182 "llvm-size", // used to prints the size of the linker sections of a program
183 "llvm-strip", // used to discard symbols from binary files to reduce their size
184 "llvm-ar", // used for creating and modifying archive files
185 "llvm-as", // used to convert LLVM assembly to LLVM bitcode
186 "llvm-dis", // used to disassemble LLVM bitcode
187 "llc", // used to compile LLVM bytecode
188 "opt", // used to optimize LLVM bytecode
191 /// LLD file names for all flavors.
192 const LLD_FILE_NAMES: &[&str] = &["ld.lld", "ld64.lld", "lld-link", "wasm-ld"];
194 pub const VERSION: usize = 2;
196 /// Extra --check-cfg to add when building
197 /// (Mode restriction, config name, config values (if any))
198 const EXTRA_CHECK_CFGS: &[(Option<Mode>, &'static str, Option<&[&'static str]>)] = &[
199 (None, "bootstrap", None),
200 (Some(Mode::Rustc), "parallel_compiler", None),
201 (Some(Mode::ToolRustc), "parallel_compiler", None),
202 (Some(Mode::Codegen), "parallel_compiler", None),
203 (Some(Mode::Std), "stdarch_intel_sde", None),
204 (Some(Mode::Std), "no_fp_fmt_parse", None),
205 (Some(Mode::Std), "no_global_oom_handling", None),
206 (Some(Mode::Std), "no_rc", None),
207 (Some(Mode::Std), "no_sync", None),
208 (Some(Mode::Std), "freebsd12", None),
209 (Some(Mode::Std), "backtrace_in_libstd", None),
210 /* Extra values not defined in the built-in targets yet, but used in std */
211 (Some(Mode::Std), "target_env", Some(&["libnx"])),
212 (Some(Mode::Std), "target_os", Some(&["watchos"])),
216 Some(&["asmjs", "spirv", "nvptx", "nvptx64", "le32", "xtensa"]),
218 /* Extra names used by dependencies */
219 // FIXME: Used by rustfmt is their test but is invalid (neither cargo nor bootstrap ever set
220 // this config) should probably by removed or use a allow attribute.
221 (Some(Mode::ToolRustc), "release", None),
222 // FIXME: Used by stdarch in their test, should use a allow attribute instead.
223 (Some(Mode::Std), "dont_compile_me", None),
224 // FIXME: Used by serde_json, but we should not be triggering on external dependencies.
225 (Some(Mode::Rustc), "no_btreemap_remove_entry", None),
226 (Some(Mode::ToolRustc), "no_btreemap_remove_entry", None),
227 // FIXME: Used by crossbeam-utils, but we should not be triggering on external dependencies.
228 (Some(Mode::Rustc), "crossbeam_loom", None),
229 (Some(Mode::ToolRustc), "crossbeam_loom", None),
230 // FIXME: Used by proc-macro2, but we should not be triggering on external dependencies.
231 (Some(Mode::Rustc), "span_locations", None),
232 (Some(Mode::ToolRustc), "span_locations", None),
233 // Can be passed in RUSTFLAGS to prevent direct syscalls in rustix.
234 (None, "rustix_use_libc", None),
237 /// A structure representing a Rust compiler.
239 /// Each compiler has a `stage` that it is associated with and a `host` that
240 /// corresponds to the platform the compiler runs on. This structure is used as
241 /// a parameter to many methods below.
242 #[derive(Eq, PartialOrd, Ord, PartialEq, Clone, Copy, Hash, Debug)]
243 pub struct Compiler {
245 host: TargetSelection,
248 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
250 /// Run normal tests and doc tests (default).
252 /// Do not run any doc tests.
254 /// Only run doc tests.
263 /// Global configuration for the build system.
265 /// This structure transitively contains all configuration for the build system.
266 /// All filesystem-encoded configuration is in `config`, all flags are in
267 /// `flags`, and then parsed or probed information is listed in the keys below.
269 /// This structure is a parameter of almost all methods in the build system,
270 /// although most functions are implemented as free functions rather than
271 /// methods specifically on this structure itself (to make it easier to
274 /// User-specified configuration from `config.toml`.
277 // Version information
280 // Properties derived from the above configuration
283 bootstrap_out: PathBuf,
284 rust_info: channel::GitInfo,
285 cargo_info: channel::GitInfo,
286 rust_analyzer_info: channel::GitInfo,
287 clippy_info: channel::GitInfo,
288 miri_info: channel::GitInfo,
289 rustfmt_info: channel::GitInfo,
290 in_tree_llvm_info: channel::GitInfo,
296 // Targets for which to build
297 build: TargetSelection,
298 hosts: Vec<TargetSelection>,
299 targets: Vec<TargetSelection>,
301 initial_rustc: PathBuf,
302 initial_cargo: PathBuf,
303 initial_lld: PathBuf,
304 initial_libdir: PathBuf,
306 // Runtime state filled in later on
307 // C/C++ compilers and archiver for all targets
308 cc: HashMap<TargetSelection, cc::Tool>,
309 cxx: HashMap<TargetSelection, cc::Tool>,
310 ar: HashMap<TargetSelection, PathBuf>,
311 ranlib: HashMap<TargetSelection, PathBuf>,
313 // allow bidirectional lookups: both name -> path and path -> name
314 crates: HashMap<Interned<String>, Crate>,
315 crate_paths: HashMap<PathBuf, Interned<String>>,
318 delayed_failures: RefCell<Vec<String>>,
319 prerelease_version: Cell<Option<u32>>,
321 RefCell<HashMap<TargetSelection, HashMap<String, (&'static str, PathBuf, Vec<String>)>>>,
323 #[cfg(feature = "build-metrics")]
324 metrics: metrics::BuildMetrics,
329 name: Interned<String>,
330 deps: HashSet<Interned<String>>,
335 fn local_path(&self, build: &Build) -> PathBuf {
336 self.path.strip_prefix(&build.config.src).unwrap().into()
340 /// When building Rust various objects are handled differently.
341 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
342 pub enum DependencyType {
343 /// Libraries originating from proc-macros.
345 /// Typical Rust libraries.
347 /// Non Rust libraries and objects shipped to ease usage of certain targets.
351 /// The various "modes" of invoking Cargo.
353 /// These entries currently correspond to the various output directories of the
354 /// build system, with each mod generating output in a different directory.
355 #[derive(Debug, Hash, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
357 /// Build the standard library, placing output in the "stageN-std" directory.
360 /// Build librustc, and compiler libraries, placing output in the "stageN-rustc" directory.
363 /// Build a codegen backend for rustc, placing the output in the "stageN-codegen" directory.
366 /// Build a tool, placing output in the "stage0-bootstrap-tools"
367 /// directory. This is for miscellaneous sets of tools that are built
368 /// using the bootstrap stage0 compiler in its entirety (target libraries
369 /// and all). Typically these tools compile with stable Rust.
372 /// Build a tool which uses the locally built std, placing output in the
373 /// "stageN-tools" directory. Its usage is quite rare, mainly used by
374 /// compiletest which needs libtest.
377 /// Build a tool which uses the locally built rustc and the target std,
378 /// placing the output in the "stageN-tools" directory. This is used for
379 /// anything that needs a fully functional rustc, such as rustdoc, clippy,
380 /// cargo, rls, rustfmt, miri, etc.
385 pub fn is_tool(&self) -> bool {
386 matches!(self, Mode::ToolBootstrap | Mode::ToolRustc | Mode::ToolStd)
389 pub fn must_support_dlopen(&self) -> bool {
390 matches!(self, Mode::Std | Mode::Codegen)
400 /// Creates a new set of build configuration from the `flags` on the command
401 /// line and the filesystem `config`.
403 /// By default all build output will be placed in the current directory.
404 pub fn new(mut config: Config) -> Build {
405 let src = config.src.clone();
406 let out = config.out.clone();
409 // keep this consistent with the equivalent check in x.py:
410 // https://github.com/rust-lang/rust/blob/a8a33cf27166d3eabaffc58ed3799e054af3b0c6/src/bootstrap/bootstrap.py#L796-L797
411 let is_sudo = match env::var_os("SUDO_USER") {
412 Some(_sudo_user) => {
413 let uid = unsafe { libc::getuid() };
421 let ignore_git = config.ignore_git;
422 let rust_info = channel::GitInfo::new(ignore_git, &src);
423 let cargo_info = channel::GitInfo::new(ignore_git, &src.join("src/tools/cargo"));
424 let rust_analyzer_info =
425 channel::GitInfo::new(ignore_git, &src.join("src/tools/rust-analyzer"));
426 let clippy_info = channel::GitInfo::new(ignore_git, &src.join("src/tools/clippy"));
427 let miri_info = channel::GitInfo::new(ignore_git, &src.join("src/tools/miri"));
428 let rustfmt_info = channel::GitInfo::new(ignore_git, &src.join("src/tools/rustfmt"));
430 // we always try to use git for LLVM builds
431 let in_tree_llvm_info = channel::GitInfo::new(false, &src.join("src/llvm-project"));
433 let initial_target_libdir_str = if config.dry_run() {
434 "/dummy/lib/path/to/lib/".to_string()
437 Command::new(&config.initial_rustc)
439 .arg(config.build.rustc_target_arg())
441 .arg("target-libdir"),
444 let initial_target_dir = Path::new(&initial_target_libdir_str).parent().unwrap();
445 let initial_lld = initial_target_dir.join("bin").join("rust-lld");
447 let initial_sysroot = if config.dry_run() {
450 output(Command::new(&config.initial_rustc).arg("--print").arg("sysroot"))
452 let initial_libdir = initial_target_dir
457 .strip_prefix(initial_sysroot.trim())
461 let version = std::fs::read_to_string(src.join("src").join("version"))
462 .expect("failed to read src/version");
463 let version = version.trim();
465 let bootstrap_out = std::env::current_exe()
466 .expect("could not determine path to running process")
470 if !bootstrap_out.join(exe("rustc", config.build)).exists() && !cfg!(test) {
471 // this restriction can be lifted whenever https://github.com/rust-lang/rfcs/pull/3028 is implemented
473 "`rustc` not found in {}, run `cargo build --bins` before `cargo run`",
474 bootstrap_out.display()
478 if rust_info.is_from_tarball() && config.description.is_none() {
479 config.description = Some("built from a source tarball".to_owned());
482 let mut build = Build {
483 initial_rustc: config.initial_rustc.clone(),
484 initial_cargo: config.initial_cargo.clone(),
487 local_rebuild: config.local_rebuild,
488 fail_fast: config.cmd.fail_fast(),
489 doc_tests: config.cmd.doc_tests(),
490 verbosity: config.verbose,
493 hosts: config.hosts.clone(),
494 targets: config.targets.clone(),
497 version: version.to_string(),
512 ranlib: HashMap::new(),
513 crates: HashMap::new(),
514 crate_paths: HashMap::new(),
516 ci_env: CiEnv::current(),
517 delayed_failures: RefCell::new(Vec::new()),
518 prerelease_version: Cell::new(None),
519 tool_artifacts: Default::default(),
521 #[cfg(feature = "build-metrics")]
522 metrics: metrics::BuildMetrics::init(),
525 build.verbose("finding compilers");
526 cc_detect::find(&mut build);
527 // When running `setup`, the profile is about to change, so any requirements we have now may
528 // be different on the next invocation. Don't check for them until the next time x.py is
529 // run. This is ok because `setup` never runs any build commands, so it won't fail if commands are missing.
530 if !matches!(build.config.cmd, Subcommand::Setup { .. }) {
531 build.verbose("running sanity check");
532 sanity::check(&mut build);
535 // If local-rust is the same major.minor as the current version, then force a
537 let local_version_verbose =
538 output(Command::new(&build.initial_rustc).arg("--version").arg("--verbose"));
539 let local_release = local_version_verbose
541 .filter_map(|x| x.strip_prefix("release:"))
545 if local_release.split('.').take(2).eq(version.split('.').take(2)) {
546 build.verbose(&format!("auto-detected local-rebuild {}", local_release));
547 build.local_rebuild = true;
550 // Make sure we update these before gathering metadata so we don't get an error about missing
552 let rust_submodules =
553 ["src/tools/rust-installer", "src/tools/cargo", "library/backtrace", "library/stdarch"];
554 for s in rust_submodules {
555 build.update_submodule(Path::new(s));
558 build.verbose("learning about cargo");
559 metadata::build(&mut build);
564 // modified from `check_submodule` and `update_submodule` in bootstrap.py
565 /// Given a path to the directory of a submodule, update it.
567 /// `relative_path` should be relative to the root of the git repository, not an absolute path.
568 pub(crate) fn update_submodule(&self, relative_path: &Path) {
569 fn dir_is_empty(dir: &Path) -> bool {
570 t!(std::fs::read_dir(dir)).next().is_none()
573 if !self.config.submodules(&self.rust_info) {
577 let absolute_path = self.config.src.join(relative_path);
579 // NOTE: The check for the empty directory is here because when running x.py the first time,
580 // the submodule won't be checked out. Check it out now so we can build it.
581 if !channel::GitInfo::new(false, &absolute_path).is_managed_git_subrepository()
582 && !dir_is_empty(&absolute_path)
588 let checked_out_hash =
589 output(Command::new("git").args(&["rev-parse", "HEAD"]).current_dir(&absolute_path));
591 let recorded = output(
593 .args(&["ls-tree", "HEAD"])
595 .current_dir(&self.config.src),
597 let actual_hash = recorded
600 .unwrap_or_else(|| panic!("unexpected output `{}`", recorded));
603 if actual_hash == checked_out_hash.trim_end() {
604 // already checked out
608 println!("Updating submodule {}", relative_path.display());
611 .args(&["submodule", "-q", "sync"])
613 .current_dir(&self.config.src),
616 // Try passing `--progress` to start, then run git again without if that fails.
617 let update = |progress: bool| {
618 let mut git = Command::new("git");
619 git.args(&["submodule", "update", "--init", "--recursive", "--depth=1"]);
621 git.arg("--progress");
623 git.arg(relative_path).current_dir(&self.config.src);
626 // NOTE: doesn't use `try_run` because this shouldn't print an error if it fails.
627 if !update(true).status().map_or(false, |status| status.success()) {
628 self.run(&mut update(false));
631 self.run(Command::new("git").args(&["reset", "-q", "--hard"]).current_dir(&absolute_path));
632 self.run(Command::new("git").args(&["clean", "-qdfx"]).current_dir(absolute_path));
635 /// If any submodule has been initialized already, sync it unconditionally.
636 /// This avoids contributors checking in a submodule change by accident.
637 pub fn maybe_update_submodules(&self) {
638 // Avoid running git when there isn't a git checkout.
639 if !self.config.submodules(&self.rust_info) {
645 .args(&["config", "--file"])
646 .arg(&self.config.src.join(".gitmodules"))
647 .args(&["--get-regexp", "path"]),
649 for line in output.lines() {
650 // Look for `submodule.$name.path = $path`
651 // Sample output: `submodule.src/rust-installer.path src/tools/rust-installer`
652 let submodule = Path::new(line.splitn(2, ' ').nth(1).unwrap());
653 // Don't update the submodule unless it's already been cloned.
654 if channel::GitInfo::new(false, submodule).is_managed_git_subrepository() {
655 self.update_submodule(submodule);
660 /// Executes the entire build, as configured by the flags and configuration.
661 pub fn build(&mut self) {
666 self.maybe_update_submodules();
668 if let Subcommand::Format { check, paths } = &self.config.cmd {
669 return format::format(&builder::Builder::new(&self), *check, &paths);
672 if let Subcommand::Clean { all } = self.config.cmd {
673 return clean::clean(self, all);
676 if let Subcommand::Setup { profile } = &self.config.cmd {
677 return setup::setup(&self.config, *profile);
680 // Download rustfmt early so that it can be used in rust-analyzer configs.
681 let _ = &builder::Builder::new(&self).initial_rustfmt();
684 let builder = builder::Builder::new(&self);
685 if let Some(path) = builder.paths.get(0) {
686 if path == Path::new("nonexistent/path/to/trigger/cargo/metadata") {
692 if !self.config.dry_run() {
694 self.config.dry_run = DryRun::SelfCheck;
695 let builder = builder::Builder::new(&self);
696 builder.execute_cli();
698 self.config.dry_run = DryRun::Disabled;
699 let builder = builder::Builder::new(&self);
700 builder.execute_cli();
702 let builder = builder::Builder::new(&self);
703 builder.execute_cli();
706 // Check for postponed failures from `test --no-fail-fast`.
707 let failures = self.delayed_failures.borrow();
708 if failures.len() > 0 {
709 eprintln!("\n{} command(s) did not execute successfully:\n", failures.len());
710 for failure in failures.iter() {
711 eprintln!(" - {}\n", failure);
716 #[cfg(feature = "build-metrics")]
717 self.metrics.persist(self);
720 /// Clear out `dir` if `input` is newer.
722 /// After this executes, it will also ensure that `dir` exists.
723 fn clear_if_dirty(&self, dir: &Path, input: &Path) -> bool {
724 let stamp = dir.join(".stamp");
725 let mut cleared = false;
726 if mtime(&stamp) < mtime(input) {
727 self.verbose(&format!("Dirty - {}", dir.display()));
728 let _ = fs::remove_dir_all(dir);
730 } else if stamp.exists() {
733 t!(fs::create_dir_all(dir));
734 t!(File::create(stamp));
738 /// Gets the space-separated set of activated features for the standard
740 fn std_features(&self, target: TargetSelection) -> String {
741 let mut features = "panic-unwind".to_string();
743 match self.config.llvm_libunwind(target) {
744 LlvmLibunwind::InTree => features.push_str(" llvm-libunwind"),
745 LlvmLibunwind::System => features.push_str(" system-llvm-libunwind"),
746 LlvmLibunwind::No => {}
748 if self.config.backtrace {
749 features.push_str(" backtrace");
751 if self.config.profiler_enabled(target) {
752 features.push_str(" profiler");
757 /// Gets the space-separated set of activated features for the compiler.
758 fn rustc_features(&self, kind: Kind) -> String {
759 let mut features = vec![];
760 if self.config.jemalloc {
761 features.push("jemalloc");
763 if self.config.llvm_enabled() || kind == Kind::Check {
764 features.push("llvm");
766 // keep in sync with `bootstrap/compile.rs:rustc_cargo_env`
767 if self.config.rustc_parallel {
768 features.push("rustc_use_parallel_compiler");
771 // If debug logging is on, then we want the default for tracing:
772 // https://github.com/tokio-rs/tracing/blob/3dd5c03d907afdf2c39444a29931833335171554/tracing/src/level_filters.rs#L26
773 // which is everything (including debug/trace/etc.)
774 // if its unset, if debug_assertions is on, then debug_logging will also be on
775 // as well as tracing *ignoring* this feature when debug_assertions is on
776 if !self.config.rust_debug_logging {
777 features.push("max_level_info");
783 /// Component directory that Cargo will produce output into (e.g.
785 fn cargo_dir(&self) -> &'static str {
786 if self.config.rust_optimize { "release" } else { "debug" }
789 fn tools_dir(&self, compiler: Compiler) -> PathBuf {
792 .join(&*compiler.host.triple)
793 .join(format!("stage{}-tools-bin", compiler.stage));
794 t!(fs::create_dir_all(&out));
798 /// Returns the root directory for all output generated in a particular
799 /// stage when running with a particular host compiler.
801 /// The mode indicates what the root directory is for.
802 fn stage_out(&self, compiler: Compiler, mode: Mode) -> PathBuf {
803 let suffix = match mode {
805 Mode::Rustc => "-rustc",
806 Mode::Codegen => "-codegen",
807 Mode::ToolBootstrap => "-bootstrap-tools",
808 Mode::ToolStd | Mode::ToolRustc => "-tools",
810 self.out.join(&*compiler.host.triple).join(format!("stage{}{}", compiler.stage, suffix))
813 /// Returns the root output directory for all Cargo output in a given stage,
814 /// running a particular compiler, whether or not we're building the
815 /// standard library, and targeting the specified architecture.
816 fn cargo_out(&self, compiler: Compiler, mode: Mode, target: TargetSelection) -> PathBuf {
817 self.stage_out(compiler, mode).join(&*target.triple).join(self.cargo_dir())
820 /// Root output directory for LLVM compiled for `target`
822 /// Note that if LLVM is configured externally then the directory returned
823 /// will likely be empty.
824 fn llvm_out(&self, target: TargetSelection) -> PathBuf {
825 self.out.join(&*target.triple).join("llvm")
828 fn lld_out(&self, target: TargetSelection) -> PathBuf {
829 self.out.join(&*target.triple).join("lld")
832 /// Output directory for all documentation for a target
833 fn doc_out(&self, target: TargetSelection) -> PathBuf {
834 self.out.join(&*target.triple).join("doc")
837 /// Output directory for all JSON-formatted documentation for a target
838 fn json_doc_out(&self, target: TargetSelection) -> PathBuf {
839 self.out.join(&*target.triple).join("json-doc")
842 fn test_out(&self, target: TargetSelection) -> PathBuf {
843 self.out.join(&*target.triple).join("test")
846 /// Output directory for all documentation for a target
847 fn compiler_doc_out(&self, target: TargetSelection) -> PathBuf {
848 self.out.join(&*target.triple).join("compiler-doc")
851 /// Output directory for some generated md crate documentation for a target (temporary)
852 fn md_doc_out(&self, target: TargetSelection) -> Interned<PathBuf> {
853 INTERNER.intern_path(self.out.join(&*target.triple).join("md-doc"))
856 /// Returns `true` if no custom `llvm-config` is set for the specified target.
858 /// If no custom `llvm-config` was specified then Rust's llvm will be used.
859 fn is_rust_llvm(&self, target: TargetSelection) -> bool {
860 match self.config.target_config.get(&target) {
861 Some(Target { llvm_has_rust_patches: Some(patched), .. }) => *patched,
862 Some(Target { llvm_config, .. }) => {
863 // If the user set llvm-config we assume Rust is not patched,
864 // but first check to see if it was configured by llvm-from-ci.
865 (self.config.llvm_from_ci && target == self.config.build) || llvm_config.is_none()
871 /// Returns the path to `FileCheck` binary for the specified target
872 fn llvm_filecheck(&self, target: TargetSelection) -> PathBuf {
873 let target_config = self.config.target_config.get(&target);
874 if let Some(s) = target_config.and_then(|c| c.llvm_filecheck.as_ref()) {
876 } else if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) {
877 let llvm_bindir = output(Command::new(s).arg("--bindir"));
878 let filecheck = Path::new(llvm_bindir.trim()).join(exe("FileCheck", target));
879 if filecheck.exists() {
882 // On Fedora the system LLVM installs FileCheck in the
883 // llvm subdirectory of the libdir.
884 let llvm_libdir = output(Command::new(s).arg("--libdir"));
886 Path::new(llvm_libdir.trim()).join("llvm").join(exe("FileCheck", target));
887 if lib_filecheck.exists() {
890 // Return the most normal file name, even though
891 // it doesn't exist, so that any error message
897 let base = self.llvm_out(target).join("build");
898 let base = if !self.ninja() && target.contains("msvc") {
899 if self.config.llvm_optimize {
900 if self.config.llvm_release_debuginfo {
901 base.join("RelWithDebInfo")
911 base.join("bin").join(exe("FileCheck", target))
915 /// Directory for libraries built from C/C++ code and shared between stages.
916 fn native_dir(&self, target: TargetSelection) -> PathBuf {
917 self.out.join(&*target.triple).join("native")
920 /// Root output directory for rust_test_helpers library compiled for
922 fn test_helpers_out(&self, target: TargetSelection) -> PathBuf {
923 self.native_dir(target).join("rust-test-helpers")
926 /// Adds the `RUST_TEST_THREADS` env var if necessary
927 fn add_rust_test_threads(&self, cmd: &mut Command) {
928 if env::var_os("RUST_TEST_THREADS").is_none() {
929 cmd.env("RUST_TEST_THREADS", self.jobs().to_string());
933 /// Returns the libdir of the snapshot compiler.
934 fn rustc_snapshot_libdir(&self) -> PathBuf {
935 self.rustc_snapshot_sysroot().join(libdir(self.config.build))
938 /// Returns the sysroot of the snapshot compiler.
939 fn rustc_snapshot_sysroot(&self) -> &Path {
940 static SYSROOT_CACHE: OnceCell<PathBuf> = once_cell::sync::OnceCell::new();
941 SYSROOT_CACHE.get_or_init(|| {
942 let mut rustc = Command::new(&self.initial_rustc);
943 rustc.args(&["--print", "sysroot"]);
944 output(&mut rustc).trim().into()
948 /// Runs a command, printing out nice contextual information if it fails.
949 fn run(&self, cmd: &mut Command) {
950 if self.config.dry_run() {
953 self.verbose(&format!("running: {:?}", cmd));
954 run(cmd, self.is_verbose())
957 /// Runs a command, printing out nice contextual information if it fails.
958 fn run_quiet(&self, cmd: &mut Command) {
959 if self.config.dry_run() {
962 self.verbose(&format!("running: {:?}", cmd));
966 /// Runs a command, printing out nice contextual information if it fails.
967 /// Exits if the command failed to execute at all, otherwise returns its
968 /// `status.success()`.
969 fn try_run(&self, cmd: &mut Command) -> bool {
970 if self.config.dry_run() {
973 self.verbose(&format!("running: {:?}", cmd));
974 try_run(cmd, self.is_verbose())
977 /// Runs a command, printing out nice contextual information if it fails.
978 /// Exits if the command failed to execute at all, otherwise returns its
979 /// `status.success()`.
980 fn try_run_quiet(&self, cmd: &mut Command) -> bool {
981 if self.config.dry_run() {
984 self.verbose(&format!("running: {:?}", cmd));
985 try_run_suppressed(cmd)
988 /// Runs a command, printing out nice contextual information if it fails.
989 /// Returns false if do not execute at all, otherwise returns its
990 /// `status.success()`.
991 fn check_run(&self, cmd: &mut Command) -> bool {
992 if self.config.dry_run() {
995 self.verbose(&format!("running: {:?}", cmd));
996 check_run(cmd, self.is_verbose())
999 pub fn is_verbose(&self) -> bool {
1003 /// Prints a message if this build is configured in verbose mode.
1004 fn verbose(&self, msg: &str) {
1005 if self.is_verbose() {
1006 println!("{}", msg);
1010 pub fn is_verbose_than(&self, level: usize) -> bool {
1011 self.verbosity > level
1014 /// Prints a message if this build is configured in more verbose mode than `level`.
1015 fn verbose_than(&self, level: usize, msg: &str) {
1016 if self.is_verbose_than(level) {
1017 println!("{}", msg);
1021 fn info(&self, msg: &str) {
1022 match self.config.dry_run {
1023 DryRun::SelfCheck => return,
1024 DryRun::Disabled | DryRun::UserSelected => {
1025 println!("{}", msg);
1030 /// Returns the number of parallel jobs that have been configured for this
1032 fn jobs(&self) -> u32 {
1033 self.config.jobs.unwrap_or_else(|| {
1034 std::thread::available_parallelism().map_or(1, std::num::NonZeroUsize::get) as u32
1038 fn debuginfo_map_to(&self, which: GitRepo) -> Option<String> {
1039 if !self.config.rust_remap_debuginfo {
1045 let sha = self.rust_sha().unwrap_or(&self.version);
1046 Some(format!("/rustc/{}", sha))
1048 GitRepo::Llvm => Some(String::from("/rustc/llvm")),
1052 /// Returns the path to the C compiler for the target specified.
1053 fn cc(&self, target: TargetSelection) -> &Path {
1054 self.cc[&target].path()
1057 /// Returns a list of flags to pass to the C compiler for the target
1059 fn cflags(&self, target: TargetSelection, which: GitRepo, c: CLang) -> Vec<String> {
1060 let base = match c {
1061 CLang::C => &self.cc[&target],
1062 CLang::Cxx => &self.cxx[&target],
1065 // Filter out -O and /O (the optimization flags) that we picked up from
1066 // cc-rs because the build scripts will determine that for themselves.
1070 .map(|s| s.to_string_lossy().into_owned())
1071 .filter(|s| !s.starts_with("-O") && !s.starts_with("/O"))
1072 .collect::<Vec<String>>();
1074 // If we're compiling on macOS then we add a few unconditional flags
1075 // indicating that we want libc++ (more filled out than libstdc++) and
1076 // we want to compile for 10.7. This way we can ensure that
1077 // LLVM/etc are all properly compiled.
1078 if target.contains("apple-darwin") {
1079 base.push("-stdlib=libc++".into());
1082 // Work around an apparently bad MinGW / GCC optimization,
1083 // See: https://lists.llvm.org/pipermail/cfe-dev/2016-December/051980.html
1084 // See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78936
1085 if &*target.triple == "i686-pc-windows-gnu" {
1086 base.push("-fno-omit-frame-pointer".into());
1089 if let Some(map_to) = self.debuginfo_map_to(which) {
1090 let map = format!("{}={}", self.src.display(), map_to);
1091 let cc = self.cc(target);
1092 if cc.ends_with("clang") || cc.ends_with("gcc") {
1093 base.push(format!("-fdebug-prefix-map={}", map));
1094 } else if cc.ends_with("clang-cl.exe") {
1095 base.push("-Xclang".into());
1096 base.push(format!("-fdebug-prefix-map={}", map));
1102 /// Returns the path to the `ar` archive utility for the target specified.
1103 fn ar(&self, target: TargetSelection) -> Option<&Path> {
1104 self.ar.get(&target).map(|p| &**p)
1107 /// Returns the path to the `ranlib` utility for the target specified.
1108 fn ranlib(&self, target: TargetSelection) -> Option<&Path> {
1109 self.ranlib.get(&target).map(|p| &**p)
1112 /// Returns the path to the C++ compiler for the target specified.
1113 fn cxx(&self, target: TargetSelection) -> Result<&Path, String> {
1114 match self.cxx.get(&target) {
1115 Some(p) => Ok(p.path()),
1117 Err(format!("target `{}` is not configured as a host, only as a target", target))
1122 /// Returns the path to the linker for the given target if it needs to be overridden.
1123 fn linker(&self, target: TargetSelection) -> Option<&Path> {
1124 if let Some(linker) = self.config.target_config.get(&target).and_then(|c| c.linker.as_ref())
1127 } else if target.contains("vxworks") {
1128 // need to use CXX compiler as linker to resolve the exception functions
1129 // that are only existed in CXX libraries
1130 Some(self.cxx[&target].path())
1131 } else if target != self.config.build
1132 && util::use_host_linker(target)
1133 && !target.contains("msvc")
1135 Some(self.cc(target))
1136 } else if self.config.use_lld && !self.is_fuse_ld_lld(target) && self.build == target {
1137 Some(&self.initial_lld)
1143 // LLD is used through `-fuse-ld=lld` rather than directly.
1144 // Only MSVC targets use LLD directly at the moment.
1145 fn is_fuse_ld_lld(&self, target: TargetSelection) -> bool {
1146 self.config.use_lld && !target.contains("msvc")
1149 fn lld_flags(&self, target: TargetSelection) -> impl Iterator<Item = String> {
1150 let mut options = [None, None];
1152 if self.config.use_lld {
1153 if self.is_fuse_ld_lld(target) {
1154 options[0] = Some("-Clink-arg=-fuse-ld=lld".to_string());
1157 let no_threads = util::lld_flag_no_threads(target.contains("windows"));
1158 options[1] = Some(format!("-Clink-arg=-Wl,{}", no_threads));
1161 IntoIterator::into_iter(options).flatten()
1164 /// Returns if this target should statically link the C runtime, if specified
1165 fn crt_static(&self, target: TargetSelection) -> Option<bool> {
1166 if target.contains("pc-windows-msvc") {
1169 self.config.target_config.get(&target).and_then(|t| t.crt_static)
1173 /// Returns the "musl root" for this `target`, if defined
1174 fn musl_root(&self, target: TargetSelection) -> Option<&Path> {
1178 .and_then(|t| t.musl_root.as_ref())
1179 .or_else(|| self.config.musl_root.as_ref())
1183 /// Returns the "musl libdir" for this `target`.
1184 fn musl_libdir(&self, target: TargetSelection) -> Option<PathBuf> {
1185 let t = self.config.target_config.get(&target)?;
1186 if let libdir @ Some(_) = &t.musl_libdir {
1187 return libdir.clone();
1189 self.musl_root(target).map(|root| root.join("lib"))
1192 /// Returns the sysroot for the wasi target, if defined
1193 fn wasi_root(&self, target: TargetSelection) -> Option<&Path> {
1194 self.config.target_config.get(&target).and_then(|t| t.wasi_root.as_ref()).map(|p| &**p)
1197 /// Returns `true` if this is a no-std `target`, if defined
1198 fn no_std(&self, target: TargetSelection) -> Option<bool> {
1199 self.config.target_config.get(&target).map(|t| t.no_std)
1202 /// Returns `true` if the target will be tested using the `remote-test-client`
1203 /// and `remote-test-server` binaries.
1204 fn remote_tested(&self, target: TargetSelection) -> bool {
1205 self.qemu_rootfs(target).is_some()
1206 || target.contains("android")
1207 || env::var_os("TEST_DEVICE_ADDR").is_some()
1210 /// Returns the root of the "rootfs" image that this target will be using,
1211 /// if one was configured.
1213 /// If `Some` is returned then that means that tests for this target are
1214 /// emulated with QEMU and binaries will need to be shipped to the emulator.
1215 fn qemu_rootfs(&self, target: TargetSelection) -> Option<&Path> {
1216 self.config.target_config.get(&target).and_then(|t| t.qemu_rootfs.as_ref()).map(|p| &**p)
1219 /// Path to the python interpreter to use
1220 fn python(&self) -> &Path {
1221 if self.config.build.ends_with("apple-darwin") {
1222 // Force /usr/bin/python3 on macOS for LLDB tests because we're loading the
1223 // LLDB plugin's compiled module which only works with the system python
1224 // (namely not Homebrew-installed python)
1225 Path::new("/usr/bin/python3")
1230 .expect("python is required for running LLDB or rustdoc tests")
1234 /// Temporary directory that extended error information is emitted to.
1235 fn extended_error_dir(&self) -> PathBuf {
1236 self.out.join("tmp/extended-error-metadata")
1239 /// Tests whether the `compiler` compiling for `target` should be forced to
1240 /// use a stage1 compiler instead.
1242 /// Currently, by default, the build system does not perform a "full
1243 /// bootstrap" by default where we compile the compiler three times.
1244 /// Instead, we compile the compiler two times. The final stage (stage2)
1245 /// just copies the libraries from the previous stage, which is what this
1248 /// Here we return `true` if:
1250 /// * The build isn't performing a full bootstrap
1251 /// * The `compiler` is in the final stage, 2
1252 /// * We're not cross-compiling, so the artifacts are already available in
1255 /// When all of these conditions are met the build will lift artifacts from
1256 /// the previous stage forward.
1257 fn force_use_stage1(&self, compiler: Compiler, target: TargetSelection) -> bool {
1258 !self.config.full_bootstrap
1259 && compiler.stage >= 2
1260 && (self.hosts.iter().any(|h| *h == target) || target == self.build)
1263 /// Given `num` in the form "a.b.c" return a "release string" which
1264 /// describes the release version number.
1266 /// For example on nightly this returns "a.b.c-nightly", on beta it returns
1267 /// "a.b.c-beta.1" and on stable it just returns "a.b.c".
1268 fn release(&self, num: &str) -> String {
1269 match &self.config.channel[..] {
1270 "stable" => num.to_string(),
1272 if self.rust_info.is_managed_git_subrepository() && !self.config.ignore_git {
1273 format!("{}-beta.{}", num, self.beta_prerelease_version())
1275 format!("{}-beta", num)
1278 "nightly" => format!("{}-nightly", num),
1279 _ => format!("{}-dev", num),
1283 fn beta_prerelease_version(&self) -> u32 {
1284 if let Some(s) = self.prerelease_version.get() {
1288 // Figure out how many merge commits happened since we branched off master.
1289 // That's our beta number!
1290 // (Note that we use a `..` range, not the `...` symmetric difference.)
1292 output(self.config.git().arg("rev-list").arg("--count").arg("--merges").arg(format!(
1293 "refs/remotes/origin/{}..HEAD",
1294 self.config.stage0_metadata.config.nightly_branch
1296 let n = count.trim().parse().unwrap();
1297 self.prerelease_version.set(Some(n));
1301 /// Returns the value of `release` above for Rust itself.
1302 fn rust_release(&self) -> String {
1303 self.release(&self.version)
1306 /// Returns the "package version" for a component given the `num` release
1309 /// The package version is typically what shows up in the names of tarballs.
1310 /// For channels like beta/nightly it's just the channel name, otherwise
1311 /// it's the `num` provided.
1312 fn package_vers(&self, num: &str) -> String {
1313 match &self.config.channel[..] {
1314 "stable" => num.to_string(),
1315 "beta" => "beta".to_string(),
1316 "nightly" => "nightly".to_string(),
1317 _ => format!("{}-dev", num),
1321 /// Returns the value of `package_vers` above for Rust itself.
1322 fn rust_package_vers(&self) -> String {
1323 self.package_vers(&self.version)
1326 /// Returns the `version` string associated with this compiler for Rust
1329 /// Note that this is a descriptive string which includes the commit date,
1330 /// sha, version, etc.
1331 fn rust_version(&self) -> String {
1332 let mut version = self.rust_info.version(self, &self.version);
1333 if let Some(ref s) = self.config.description {
1334 version.push_str(" (");
1335 version.push_str(s);
1341 /// Returns the full commit hash.
1342 fn rust_sha(&self) -> Option<&str> {
1343 self.rust_info.sha()
1346 /// Returns the `a.b.c` version that the given package is at.
1347 fn release_num(&self, package: &str) -> String {
1348 let toml_file_name = self.src.join(&format!("src/tools/{}/Cargo.toml", package));
1349 let toml = t!(fs::read_to_string(&toml_file_name));
1350 for line in toml.lines() {
1351 if let Some(stripped) =
1352 line.strip_prefix("version = \"").and_then(|s| s.strip_suffix("\""))
1354 return stripped.to_owned();
1358 panic!("failed to find version in {}'s Cargo.toml", package)
1361 /// Returns `true` if unstable features should be enabled for the compiler
1363 fn unstable_features(&self) -> bool {
1364 match &self.config.channel[..] {
1365 "stable" | "beta" => false,
1366 "nightly" | _ => true,
1370 /// Returns a Vec of all the dependencies of the given root crate,
1371 /// including transitive dependencies and the root itself. Only includes
1372 /// "local" crates (those in the local source tree, not from a registry).
1373 fn in_tree_crates(&self, root: &str, target: Option<TargetSelection>) -> Vec<&Crate> {
1374 let mut ret = Vec::new();
1375 let mut list = vec![INTERNER.intern_str(root)];
1376 let mut visited = HashSet::new();
1377 while let Some(krate) = list.pop() {
1378 let krate = &self.crates[&krate];
1380 for dep in &krate.deps {
1381 if !self.crates.contains_key(dep) {
1382 // Ignore non-workspace members.
1385 // Don't include optional deps if their features are not
1386 // enabled. Ideally this would be computed from `cargo
1387 // metadata --features …`, but that is somewhat slow. In
1388 // the future, we may want to consider just filtering all
1389 // build and dev dependencies in metadata::build.
1390 if visited.insert(dep)
1391 && (dep != "profiler_builtins"
1393 .map(|t| self.config.profiler_enabled(t))
1394 .unwrap_or_else(|| self.config.any_profiler_enabled()))
1395 && (dep != "rustc_codegen_llvm" || self.config.llvm_enabled())
1404 fn read_stamp_file(&self, stamp: &Path) -> Vec<(PathBuf, DependencyType)> {
1405 if self.config.dry_run() {
1409 let mut paths = Vec::new();
1410 let contents = t!(fs::read(stamp), &stamp);
1411 // This is the method we use for extracting paths from the stamp file passed to us. See
1412 // run_cargo for more information (in compile.rs).
1413 for part in contents.split(|b| *b == 0) {
1414 if part.is_empty() {
1417 let dependency_type = match part[0] as char {
1418 'h' => DependencyType::Host,
1419 's' => DependencyType::TargetSelfContained,
1420 't' => DependencyType::Target,
1421 _ => unreachable!(),
1423 let path = PathBuf::from(t!(str::from_utf8(&part[1..])));
1424 paths.push((path, dependency_type));
1429 /// Create a temporary directory in `out` and return its path.
1431 /// NOTE: this temporary directory is shared between all steps;
1432 /// if you need an empty directory, create a new subdirectory inside it.
1433 fn tempdir(&self) -> PathBuf {
1434 let tmp = self.out.join("tmp");
1435 t!(fs::create_dir_all(&tmp));
1439 /// Copies a file from `src` to `dst`
1440 pub fn copy(&self, src: &Path, dst: &Path) {
1441 self.copy_internal(src, dst, false);
1444 fn copy_internal(&self, src: &Path, dst: &Path, dereference_symlinks: bool) {
1445 if self.config.dry_run() {
1448 self.verbose_than(1, &format!("Copy {:?} to {:?}", src, dst));
1452 let _ = fs::remove_file(&dst);
1453 let metadata = t!(src.symlink_metadata());
1454 let mut src = src.to_path_buf();
1455 if metadata.file_type().is_symlink() {
1456 if dereference_symlinks {
1457 src = t!(fs::canonicalize(src));
1459 let link = t!(fs::read_link(src));
1460 t!(self.symlink_file(link, dst));
1464 if let Ok(()) = fs::hard_link(&src, dst) {
1465 // Attempt to "easy copy" by creating a hard link
1466 // (symlinks don't work on windows), but if that fails
1467 // just fall back to a slow `copy` operation.
1469 if let Err(e) = fs::copy(&src, dst) {
1470 panic!("failed to copy `{}` to `{}`: {}", src.display(), dst.display(), e)
1472 t!(fs::set_permissions(dst, metadata.permissions()));
1473 let atime = FileTime::from_last_access_time(&metadata);
1474 let mtime = FileTime::from_last_modification_time(&metadata);
1475 t!(filetime::set_file_times(dst, atime, mtime));
1479 /// Copies the `src` directory recursively to `dst`. Both are assumed to exist
1480 /// when this function is called.
1481 pub fn cp_r(&self, src: &Path, dst: &Path) {
1482 if self.config.dry_run() {
1485 for f in self.read_dir(src) {
1486 let path = f.path();
1487 let name = path.file_name().unwrap();
1488 let dst = dst.join(name);
1489 if t!(f.file_type()).is_dir() {
1490 t!(fs::create_dir_all(&dst));
1491 self.cp_r(&path, &dst);
1493 let _ = fs::remove_file(&dst);
1494 self.copy(&path, &dst);
1499 /// Copies the `src` directory recursively to `dst`. Both are assumed to exist
1500 /// when this function is called. Unwanted files or directories can be skipped
1501 /// by returning `false` from the filter function.
1502 pub fn cp_filtered(&self, src: &Path, dst: &Path, filter: &dyn Fn(&Path) -> bool) {
1503 // Immediately recurse with an empty relative path
1504 self.recurse_(src, dst, Path::new(""), filter)
1507 // Inner function does the actual work
1508 fn recurse_(&self, src: &Path, dst: &Path, relative: &Path, filter: &dyn Fn(&Path) -> bool) {
1509 for f in self.read_dir(src) {
1510 let path = f.path();
1511 let name = path.file_name().unwrap();
1512 let dst = dst.join(name);
1513 let relative = relative.join(name);
1514 // Only copy file or directory if the filter function returns true
1515 if filter(&relative) {
1516 if t!(f.file_type()).is_dir() {
1517 let _ = fs::remove_dir_all(&dst);
1518 self.create_dir(&dst);
1519 self.recurse_(&path, &dst, &relative, filter);
1521 let _ = fs::remove_file(&dst);
1522 self.copy(&path, &dst);
1528 fn copy_to_folder(&self, src: &Path, dest_folder: &Path) {
1529 let file_name = src.file_name().unwrap();
1530 let dest = dest_folder.join(file_name);
1531 self.copy(src, &dest);
1534 fn install(&self, src: &Path, dstdir: &Path, perms: u32) {
1535 if self.config.dry_run() {
1538 let dst = dstdir.join(src.file_name().unwrap());
1539 self.verbose_than(1, &format!("Install {:?} to {:?}", src, dst));
1540 t!(fs::create_dir_all(dstdir));
1542 panic!("Error: File \"{}\" not found!", src.display());
1544 self.copy_internal(src, &dst, true);
1548 fn create(&self, path: &Path, s: &str) {
1549 if self.config.dry_run() {
1552 t!(fs::write(path, s));
1555 fn read(&self, path: &Path) -> String {
1556 if self.config.dry_run() {
1557 return String::new();
1559 t!(fs::read_to_string(path))
1562 fn create_dir(&self, dir: &Path) {
1563 if self.config.dry_run() {
1566 t!(fs::create_dir_all(dir))
1569 fn remove_dir(&self, dir: &Path) {
1570 if self.config.dry_run() {
1573 t!(fs::remove_dir_all(dir))
1576 fn read_dir(&self, dir: &Path) -> impl Iterator<Item = fs::DirEntry> {
1577 let iter = match fs::read_dir(dir) {
1579 Err(_) if self.config.dry_run() => return vec![].into_iter(),
1580 Err(err) => panic!("could not read dir {:?}: {:?}", dir, err),
1582 iter.map(|e| t!(e)).collect::<Vec<_>>().into_iter()
1585 fn symlink_file<P: AsRef<Path>, Q: AsRef<Path>>(&self, src: P, link: Q) -> io::Result<()> {
1587 use std::os::unix::fs::symlink as symlink_file;
1589 use std::os::windows::fs::symlink_file;
1590 if !self.config.dry_run() { symlink_file(src.as_ref(), link.as_ref()) } else { Ok(()) }
1593 fn remove(&self, f: &Path) {
1594 if self.config.dry_run() {
1597 fs::remove_file(f).unwrap_or_else(|_| panic!("failed to remove {:?}", f));
1600 /// Returns if config.ninja is enabled, and checks for ninja existence,
1601 /// exiting with a nicer error message if not.
1602 fn ninja(&self) -> bool {
1603 let mut cmd_finder = crate::sanity::Finder::new();
1605 if self.config.ninja_in_file {
1606 // Some Linux distros rename `ninja` to `ninja-build`.
1607 // CMake can work with either binary name.
1608 if cmd_finder.maybe_have("ninja-build").is_none()
1609 && cmd_finder.maybe_have("ninja").is_none()
1613 Couldn't find required command: ninja (or ninja-build)
1615 You should install ninja as described at
1616 <https://github.com/ninja-build/ninja/wiki/Pre-built-Ninja-packages>,
1617 or set `ninja = false` in the `[llvm]` section of `config.toml`.
1618 Alternatively, set `download-ci-llvm = true` in that `[llvm]` section
1619 to download LLVM rather than building it.
1626 // If ninja isn't enabled but we're building for MSVC then we try
1627 // doubly hard to enable it. It was realized in #43767 that the msbuild
1628 // CMake generator for MSVC doesn't respect configuration options like
1629 // disabling LLVM assertions, which can often be quite important!
1631 // In these cases we automatically enable Ninja if we find it in the
1633 if !self.config.ninja_in_file && self.config.build.contains("msvc") {
1634 if cmd_finder.maybe_have("ninja").is_some() {
1639 self.config.ninja_in_file
1644 fn chmod(path: &Path, perms: u32) {
1645 use std::os::unix::fs::*;
1646 t!(fs::set_permissions(path, fs::Permissions::from_mode(perms)));
1649 fn chmod(_path: &Path, _perms: u32) {}
1651 /// If code is not 0 (successful exit status), exit status is 101 (rust's default error code.)
1652 /// If the test is running and code is an error code, it will cause a panic.
1653 fn detail_exit(code: i32) -> ! {
1654 // if in test and code is an error code, panic with status code provided
1655 if cfg!(test) && code != 0 {
1656 panic!("status code: {}", code);
1658 //otherwise,exit with provided status code
1659 std::process::exit(code);
1664 pub fn with_stage(mut self, stage: u32) -> Compiler {
1669 /// Returns `true` if this is a snapshot compiler for `build`'s configuration
1670 pub fn is_snapshot(&self, build: &Build) -> bool {
1671 self.stage == 0 && self.host == build.build
1674 /// Returns if this compiler should be treated as a final stage one in the
1675 /// current build session.
1676 /// This takes into account whether we're performing a full bootstrap or
1677 /// not; don't directly compare the stage with `2`!
1678 pub fn is_final_stage(&self, build: &Build) -> bool {
1679 let final_stage = if build.config.full_bootstrap { 2 } else { 1 };
1680 self.stage >= final_stage
1684 fn envify(s: &str) -> String {
1690 .flat_map(|c| c.to_uppercase())