1 // Copyright 2017 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 use std::cell::RefCell;
14 use std::path::{Path, PathBuf};
15 use std::process::Command;
23 use util::{exe, libdir, add_lib_path};
25 use cache::{INTERNER, Interned, Cache};
27 use flags::Subcommand;
33 pub struct Builder<'a> {
38 stack: RefCell<Vec<Box<Any>>>,
41 impl<'a> Deref for Builder<'a> {
44 fn deref(&self) -> &Self::Target {
49 pub trait Step: 'static + Clone + Debug + PartialEq + Eq + Hash {
50 /// `PathBuf` when directories are created or to return a `Compiler` once
51 /// it's been assembled.
54 const DEFAULT: bool = false;
56 /// Run this rule for all hosts without cross compiling.
57 const ONLY_HOSTS: bool = false;
59 /// Run this rule for all targets, but only with the native host.
60 const ONLY_BUILD_TARGETS: bool = false;
62 /// Only run this step with the build triple as host and target.
63 const ONLY_BUILD: bool = false;
65 /// Primary function to execute this rule. Can call `builder.ensure(...)`
66 /// with other steps to run those.
67 fn run(self, builder: &Builder) -> Self::Output;
69 /// When bootstrap is passed a set of paths, this controls whether this rule
70 /// will execute. However, it does not get called in a "default" context
71 /// when we are not passed any paths; in that case, make_run is called
73 fn should_run(builder: &Builder, path: &Path) -> bool;
75 /// Build up a "root" rule, either as a default rule or from a path passed
78 /// When path is `None`, we are executing in a context where no paths were
79 /// passed. When `./x.py build` is run, for example, this rule could get
80 /// called if it is in the correct list below with a path of `None`.
84 _host: Interned<String>,
85 _target: Interned<String>,
87 // It is reasonable to not have an implementation of make_run for rules
88 // who do not want to get called from the root context. This means that
89 // they are likely dependencies (e.g., sysroot creation) or similar, and
90 // as such calling them from ./x.py isn't logical.
95 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
106 ($self:ident, $paths:ident, $($rule:ty),+ $(,)*) => {{
108 if paths.is_empty() {
110 if <$rule>::DEFAULT {
111 $self.maybe_run::<$rule>(None);
116 let mut attempted_run = false;
118 if <$rule>::should_run($self, path) {
119 attempted_run = true;
120 $self.maybe_run::<$rule>(Some(path));
124 eprintln!("Warning: no rules matched {}.", path.display());
131 impl<'a> Builder<'a> {
132 pub fn run(build: &Build) {
133 let (kind, paths) = match build.flags.cmd {
134 Subcommand::Build { ref paths } => (Kind::Build, &paths[..]),
135 Subcommand::Doc { ref paths } => (Kind::Doc, &paths[..]),
136 Subcommand::Test { ref paths, .. } => (Kind::Test, &paths[..]),
137 Subcommand::Bench { ref paths, .. } => (Kind::Bench, &paths[..]),
138 Subcommand::Dist { ref paths } => (Kind::Dist, &paths[..]),
139 Subcommand::Install { ref paths } => (Kind::Install, &paths[..]),
140 Subcommand::Clean => panic!(),
143 let builder = Builder {
145 top_stage: build.flags.stage.unwrap_or(2),
148 stack: RefCell::new(Vec::new()),
151 let builder = &builder;
153 Kind::Build => check!(builder, paths, compile::Std, compile::Test, compile::Rustc,
154 compile::StartupObjects, tool::BuildManifest, tool::Rustbook, tool::ErrorIndex,
155 tool::UnstableBookGen, tool::Tidy, tool::Linkchecker, tool::CargoTest,
156 tool::Compiletest, tool::RemoteTestServer, tool::RemoteTestClient,
157 tool::RustInstaller, tool::Cargo, tool::Rls),
158 Kind::Test => check!(builder, paths, check::Tidy, check::Bootstrap, check::Compiletest,
159 check::Krate, check::KrateLibrustc, check::Linkcheck, check::Cargotest,
160 check::Cargo, check::Docs, check::ErrorIndex, check::Distcheck),
161 Kind::Bench => check!(builder, paths, check::Krate, check::KrateLibrustc),
162 Kind::Doc => builder.default_doc(Some(paths)),
163 Kind::Dist => check!(builder, paths, dist::Docs, dist::Mingw, dist::Rustc,
164 dist::DebuggerScripts, dist::Std, dist::Analysis, dist::Src,
165 dist::PlainSourceTarball, dist::Cargo, dist::Rls, dist::Extended, dist::HashSign),
166 Kind::Install => check!(builder, paths, install::Docs, install::Std, install::Cargo,
167 install::Rls, install::Analysis, install::Src, install::Rustc),
171 pub fn default_doc(&self, paths: Option<&[PathBuf]>) {
172 let paths = paths.unwrap_or(&[]);
173 check!(self, paths, doc::UnstableBook, doc::UnstableBookGen, doc::Rustbook, doc::TheBook,
174 doc::Standalone, doc::Std, doc::Test, doc::Rustc, doc::ErrorIndex,
175 doc::Nomicon, doc::Reference);
178 /// Obtain a compiler at a given stage and for a given host. Explictly does
179 /// not take `Compiler` since all `Compiler` instances are meant to be
180 /// obtained through this function, since it ensures that they are valid
181 /// (i.e., built and assembled).
182 pub fn compiler(&self, stage: u32, host: Interned<String>) -> Compiler {
183 self.ensure(compile::Assemble { target_compiler: Compiler { stage, host } })
186 pub fn sysroot(&self, compiler: Compiler) -> Interned<PathBuf> {
187 self.ensure(compile::Sysroot { compiler })
190 /// Returns the libdir where the standard library and other artifacts are
191 /// found for a compiler's sysroot.
192 pub fn sysroot_libdir(
193 &self, compiler: Compiler, target: Interned<String>
194 ) -> Interned<PathBuf> {
195 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
198 target: Interned<String>,
200 impl Step for Libdir {
201 type Output = Interned<PathBuf>;
203 fn should_run(_builder: &Builder, _path: &Path) -> bool {
207 fn run(self, builder: &Builder) -> Interned<PathBuf> {
208 let compiler = self.compiler;
209 let lib = if compiler.stage >= 2 && builder.build.config.libdir_relative.is_some() {
210 builder.build.config.libdir_relative.clone().unwrap()
214 let sysroot = builder.sysroot(self.compiler).join(lib)
215 .join("rustlib").join(self.target).join("lib");
216 let _ = fs::remove_dir_all(&sysroot);
217 t!(fs::create_dir_all(&sysroot));
218 INTERNER.intern_path(sysroot)
221 self.ensure(Libdir { compiler, target })
224 /// Returns the compiler's libdir where it stores the dynamic libraries that
225 /// it itself links against.
227 /// For example this returns `<sysroot>/lib` on Unix and `<sysroot>/bin` on
229 pub fn rustc_libdir(&self, compiler: Compiler) -> PathBuf {
230 if compiler.is_snapshot(self) {
231 self.build.rustc_snapshot_libdir()
233 self.sysroot(compiler).join(libdir(&compiler.host))
237 /// Adds the compiler's directory of dynamic libraries to `cmd`'s dynamic
238 /// library lookup path.
239 pub fn add_rustc_lib_path(&self, compiler: Compiler, cmd: &mut Command) {
240 // Windows doesn't need dylib path munging because the dlls for the
241 // compiler live next to the compiler and the system will find them
247 add_lib_path(vec![self.rustc_libdir(compiler)], cmd);
250 /// Get a path to the compiler specified.
251 pub fn rustc(&self, compiler: Compiler) -> PathBuf {
252 if compiler.is_snapshot(self) {
253 self.initial_rustc.clone()
255 self.sysroot(compiler).join("bin").join(exe("rustc", &compiler.host))
259 /// Get the `rustdoc` executable next to the specified compiler
260 pub fn rustdoc(&self, compiler: Compiler) -> PathBuf {
261 let mut rustdoc = self.rustc(compiler);
263 rustdoc.push(exe("rustdoc", &compiler.host));
267 /// Prepares an invocation of `cargo` to be run.
269 /// This will create a `Command` that represents a pending execution of
270 /// Cargo. This cargo will be configured to use `compiler` as the actual
271 /// rustc compiler, its output will be scoped by `mode`'s output directory,
272 /// it will pass the `--target` flag for the specified `target`, and will be
273 /// executing the Cargo command `cmd`.
277 target: Interned<String>,
278 cmd: &str) -> Command {
279 let mut cargo = Command::new(&self.initial_cargo);
280 let out_dir = self.stage_out(compiler, mode);
281 cargo.env("CARGO_TARGET_DIR", out_dir)
283 .arg("-j").arg(self.jobs().to_string())
284 .arg("--target").arg(target);
286 // FIXME: Temporary fix for https://github.com/rust-lang/cargo/issues/3005
287 // Force cargo to output binaries with disambiguating hashes in the name
288 cargo.env("__CARGO_DEFAULT_LIB_METADATA", &self.config.channel);
291 if compiler.stage == 0 && self.local_rebuild {
292 // Assume the local-rebuild rustc already has stage1 features.
295 stage = compiler.stage;
298 // Customize the compiler we're running. Specify the compiler to cargo
299 // as our shim and then pass it some various options used to configure
300 // how the actual compiler itself is called.
302 // These variables are primarily all read by
303 // src/bootstrap/bin/{rustc.rs,rustdoc.rs}
304 cargo.env("RUSTBUILD_NATIVE_DIR", self.native_dir(target))
305 .env("RUSTC", self.out.join("bootstrap/debug/rustc"))
306 .env("RUSTC_REAL", self.rustc(compiler))
307 .env("RUSTC_STAGE", stage.to_string())
308 .env("RUSTC_CODEGEN_UNITS",
309 self.config.rust_codegen_units.to_string())
310 .env("RUSTC_DEBUG_ASSERTIONS",
311 self.config.rust_debug_assertions.to_string())
312 .env("RUSTC_SYSROOT", self.sysroot(compiler))
313 .env("RUSTC_LIBDIR", self.rustc_libdir(compiler))
314 .env("RUSTC_RPATH", self.config.rust_rpath.to_string())
315 .env("RUSTDOC", self.out.join("bootstrap/debug/rustdoc"))
316 .env("RUSTDOC_REAL", self.rustdoc(compiler))
317 .env("RUSTC_FLAGS", self.rustc_flags(target).join(" "));
319 if mode != Mode::Tool {
320 // Tools don't get debuginfo right now, e.g. cargo and rls don't
321 // get compiled with debuginfo.
322 cargo.env("RUSTC_DEBUGINFO", self.config.rust_debuginfo.to_string())
323 .env("RUSTC_DEBUGINFO_LINES", self.config.rust_debuginfo_lines.to_string())
324 .env("RUSTC_FORCE_UNSTABLE", "1");
326 // Currently the compiler depends on crates from crates.io, and
327 // then other crates can depend on the compiler (e.g. proc-macro
328 // crates). Let's say, for example that rustc itself depends on the
329 // bitflags crate. If an external crate then depends on the
330 // bitflags crate as well, we need to make sure they don't
331 // conflict, even if they pick the same verison of bitflags. We'll
332 // want to make sure that e.g. a plugin and rustc each get their
333 // own copy of bitflags.
335 // Cargo ensures that this works in general through the -C metadata
336 // flag. This flag will frob the symbols in the binary to make sure
337 // they're different, even though the source code is the exact
338 // same. To solve this problem for the compiler we extend Cargo's
339 // already-passed -C metadata flag with our own. Our rustc.rs
340 // wrapper around the actual rustc will detect -C metadata being
341 // passed and frob it with this extra string we're passing in.
342 cargo.env("RUSTC_METADATA_SUFFIX", "rustc");
345 // Enable usage of unstable features
346 cargo.env("RUSTC_BOOTSTRAP", "1");
347 self.add_rust_test_threads(&mut cargo);
349 // Almost all of the crates that we compile as part of the bootstrap may
350 // have a build script, including the standard library. To compile a
351 // build script, however, it itself needs a standard library! This
352 // introduces a bit of a pickle when we're compiling the standard
355 // To work around this we actually end up using the snapshot compiler
356 // (stage0) for compiling build scripts of the standard library itself.
357 // The stage0 compiler is guaranteed to have a libstd available for use.
359 // For other crates, however, we know that we've already got a standard
360 // library up and running, so we can use the normal compiler to compile
361 // build scripts in that situation.
362 if mode == Mode::Libstd {
363 cargo.env("RUSTC_SNAPSHOT", &self.initial_rustc)
364 .env("RUSTC_SNAPSHOT_LIBDIR", self.rustc_snapshot_libdir());
366 cargo.env("RUSTC_SNAPSHOT", self.rustc(compiler))
367 .env("RUSTC_SNAPSHOT_LIBDIR", self.rustc_libdir(compiler));
370 // Ignore incremental modes except for stage0, since we're
371 // not guaranteeing correctness across builds if the compiler
372 // is changing under your feet.`
373 if self.flags.incremental && compiler.stage == 0 {
374 let incr_dir = self.incremental_dir(compiler);
375 cargo.env("RUSTC_INCREMENTAL", incr_dir);
378 if let Some(ref on_fail) = self.flags.on_fail {
379 cargo.env("RUSTC_ON_FAIL", on_fail);
382 cargo.env("RUSTC_VERBOSE", format!("{}", self.verbosity));
384 // Specify some various options for build scripts used throughout
387 // FIXME: the guard against msvc shouldn't need to be here
388 if !target.contains("msvc") {
389 cargo.env(format!("CC_{}", target), self.cc(target))
390 .env(format!("AR_{}", target), self.ar(target).unwrap()) // only msvc is None
391 .env(format!("CFLAGS_{}", target), self.cflags(target).join(" "));
393 if let Ok(cxx) = self.cxx(target) {
394 cargo.env(format!("CXX_{}", target), cxx);
398 if mode == Mode::Libstd && self.config.extended && compiler.is_final_stage(self) {
399 cargo.env("RUSTC_SAVE_ANALYSIS", "api".to_string());
402 // When being built Cargo will at some point call `nmake.exe` on Windows
403 // MSVC. Unfortunately `nmake` will read these two environment variables
404 // below and try to intepret them. We're likely being run, however, from
405 // MSYS `make` which uses the same variables.
407 // As a result, to prevent confusion and errors, we remove these
408 // variables from our environment to prevent passing MSYS make flags to
409 // nmake, causing it to blow up.
410 if cfg!(target_env = "msvc") {
411 cargo.env_remove("MAKE");
412 cargo.env_remove("MAKEFLAGS");
415 // Environment variables *required* throughout the build
417 // FIXME: should update code to not require this env var
418 cargo.env("CFG_COMPILER_HOST_TRIPLE", target);
420 if self.is_verbose() {
423 // FIXME: cargo bench does not accept `--release`
424 if self.config.rust_optimize && cmd != "bench" {
425 cargo.arg("--release");
427 if self.config.locked_deps {
428 cargo.arg("--locked");
430 if self.config.vendor || self.is_sudo {
431 cargo.arg("--frozen");
434 self.ci_env.force_coloring_in_ci(&mut cargo);
439 fn maybe_run<S: Step>(&self, path: Option<&Path>) {
440 let build = self.build;
441 let hosts = if S::ONLY_BUILD_TARGETS || S::ONLY_BUILD {
442 &build.config.host[..1]
447 // Determine the actual targets participating in this rule.
448 // NOTE: We should keep the full projection from build triple to
449 // the hosts for the dist steps, now that the hosts array above is
450 // truncated to avoid duplication of work in that case. Therefore
451 // the original non-shadowed hosts array is used below.
452 let targets = if S::ONLY_HOSTS {
453 // If --target was specified but --host wasn't specified,
454 // don't run any host-only tests. Also, respect any `--host`
455 // overrides as done for `hosts`.
456 if build.flags.host.len() > 0 {
457 &build.flags.host[..]
458 } else if build.flags.target.len() > 0 {
460 } else if S::ONLY_BUILD {
461 &build.config.host[..1]
463 &build.config.host[..]
470 for target in targets {
471 S::make_run(self, path, *host, *target);
476 /// Ensure that a given step is built, returning it's output. This will
477 /// cache the step, so it is safe (and good!) to call this as often as
478 /// needed to ensure that all dependencies are built.
479 pub fn ensure<S: Step>(&'a self, step: S) -> S::Output {
481 let mut stack = self.stack.borrow_mut();
482 for stack_step in stack.iter() {
484 if stack_step.downcast_ref::<S>().map_or(true, |stack_step| *stack_step != step) {
487 let mut out = String::new();
488 out += &format!("\n\nCycle in build detected when adding {:?}\n", step);
489 for el in stack.iter().rev() {
490 out += &format!("\t{:?}\n", el);
494 if let Some(out) = self.cache.get(&step) {
495 self.build.verbose(&format!("{}c {:?}", " ".repeat(stack.len()), step));
499 self.build.verbose(&format!("{}> {:?}", " ".repeat(stack.len()), step));
500 stack.push(Box::new(step.clone()));
502 let out = step.clone().run(self);
504 let mut stack = self.stack.borrow_mut();
505 let cur_step = stack.pop().expect("step stack empty");
506 assert_eq!(cur_step.downcast_ref(), Some(&step));
508 self.build.verbose(&format!("{}< {:?}", " ".repeat(self.stack.borrow().len()), step));
509 self.cache.put(step, out.clone());