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.
11 use serde::{Serialize, Deserialize};
13 use std::cell::RefCell;
14 use std::path::{Path, PathBuf};
15 use std::process::Command;
22 use util::{exe, libdir, add_lib_path};
24 use cache::{Cache, Key};
26 use flags::Subcommand;
31 pub struct Builder<'a> {
36 stack: RefCell<Vec<Key>>,
39 impl<'a> Deref for Builder<'a> {
42 fn deref(&self) -> &Self::Target {
47 pub trait Step<'a>: Sized {
48 type Output: Serialize + Deserialize<'a>;
50 const DEFAULT: bool = false;
52 /// Run this rule for all hosts, and just the same hosts as the targets.
53 const ONLY_HOSTS: bool = false;
55 /// Run this rule for all targets, but only with the native host.
56 const ONLY_BUILD_TARGETS: bool = false;
58 /// Only run this step with the build triple as host and target.
59 const ONLY_BUILD: bool = false;
61 fn run(self, builder: &'a Builder) -> Self::Output;
63 fn should_run(_builder: &'a Builder, _path: &Path) -> bool { false }
66 _builder: &'a Builder,
70 ) { unimplemented!() }
73 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
84 (@inner $self:ident, $rule:ty, $path:expr) => {
85 let build = $self.build;
86 let hosts = if <$rule>::ONLY_BUILD_TARGETS || <$rule>::ONLY_BUILD {
87 &build.config.host[..1]
92 // Determine the actual targets participating in this rule.
93 // NOTE: We should keep the full projection from build triple to
94 // the hosts for the dist steps, now that the hosts array above is
95 // truncated to avoid duplication of work in that case. Therefore
96 // the original non-shadowed hosts array is used below.
97 let targets = if <$rule>::ONLY_HOSTS {
98 // If --target was specified but --host wasn't specified,
99 // don't run any host-only tests. Also, respect any `--host`
100 // overrides as done for `hosts`.
101 if build.flags.host.len() > 0 {
102 &build.flags.host[..]
103 } else if build.flags.target.len() > 0 {
105 } else if <$rule>::ONLY_BUILD {
106 &build.config.host[..1]
108 &build.config.host[..]
114 build.verbose(&format!("executing {} with hosts={:?}, targets={:?}",
115 stringify!($rule), hosts, targets));
117 for target in targets {
118 <$rule>::make_run($self, $path, host, target);
122 ($self:ident, $paths:ident, $($rule:ty),+ $(,)*) => {{
124 if paths.is_empty() {
126 if <$rule>::DEFAULT {
127 check!(@inner $self, $rule, None);
133 if <$rule>::should_run($self, path) {
134 check!(@inner $self, $rule, Some(path));
142 impl<'a> Builder<'a> {
143 pub fn run(build: &Build) {
144 let (kind, paths) = match build.flags.cmd {
145 Subcommand::Build { ref paths } => (Kind::Build, &paths[..]),
146 Subcommand::Doc { ref paths } => (Kind::Doc, &paths[..]),
147 Subcommand::Test { ref paths, .. } => (Kind::Test, &paths[..]),
148 Subcommand::Bench { ref paths, .. } => (Kind::Bench, &paths[..]),
149 Subcommand::Dist { ref paths } => (Kind::Dist, &paths[..]),
150 Subcommand::Install { ref paths } => (Kind::Install, &paths[..]),
151 Subcommand::Clean => panic!(),
154 let builder = Builder {
156 top_stage: build.flags.stage.unwrap_or(2),
159 stack: RefCell::new(Vec::new()),
162 let builder = &builder;
164 Kind::Build => check!(builder, paths, compile::Std, compile::Test, compile::Rustc,
165 compile::StartupObjects),
166 Kind::Test => check!(builder, paths, check::Tidy, check::Bootstrap, check::Compiletest,
167 check::Krate, check::KrateLibrustc, check::Linkcheck, check::Cargotest,
168 check::Cargo, check::Docs, check::ErrorIndex, check::Distcheck),
169 Kind::Bench => check!(builder, paths, check::Krate, check::KrateLibrustc),
170 Kind::Doc => builder.default_doc(Some(paths)),
171 Kind::Dist => check!(builder, paths, dist::Docs, dist::Mingw, dist::Rustc,
172 dist::DebuggerScripts, dist::Std, dist::Analysis, dist::Src,
173 dist::PlainSourceTarball, dist::Cargo, dist::Rls, dist::Extended, dist::HashSign),
174 Kind::Install => check!(builder, paths, install::Docs, install::Std, install::Cargo,
175 install::Rls, install::Analysis, install::Src, install::Rustc),
179 pub fn default_doc(&self, paths: Option<&[PathBuf]>) {
180 let paths = paths.unwrap_or(&[]);
181 check!(self, paths, doc::UnstableBook, doc::UnstableBookGen, doc::Rustbook, doc::TheBook,
182 doc::Standalone, doc::Std, doc::Test, doc::Rustc, doc::ErrorIndex,
183 doc::Nomicon, doc::Reference);
186 pub fn compiler(&'a self, stage: u32, host: &'a str) -> Compiler<'a> {
187 self.ensure(compile::Assemble { target_compiler: Compiler { stage, host } })
190 pub fn rustc(&self, compiler: Compiler) -> PathBuf {
191 if compiler.is_snapshot(self) {
192 self.build.initial_rustc.clone()
194 self.compiler(compiler.stage, compiler.host);
195 self.sysroot(compiler).join("bin").join(exe("rustc", compiler.host))
199 pub fn rustdoc(&self, compiler: Compiler) -> PathBuf {
200 let mut rustdoc = self.rustc(compiler);
202 rustdoc.push(exe("rustdoc", compiler.host));
206 pub fn sysroot(&self, compiler: Compiler<'a>) -> PathBuf {
207 self.ensure(compile::Sysroot { compiler })
210 /// Returns the libdir where the standard library and other artifacts are
211 /// found for a compiler's sysroot.
212 pub fn sysroot_libdir(&self, compiler: Compiler<'a>, target: &'a str) -> PathBuf {
215 compiler: Compiler<'a>,
218 impl<'a> Step<'a> for Libdir<'a> {
219 type Output = PathBuf;
220 fn run(self, builder: &Builder) -> PathBuf {
221 let sysroot = builder.sysroot(self.compiler)
222 .join("lib").join("rustlib").join(self.target).join("lib");
223 let _ = fs::remove_dir_all(&sysroot);
224 t!(fs::create_dir_all(&sysroot));
228 self.ensure(Libdir { compiler, target })
231 /// Returns the compiler's libdir where it stores the dynamic libraries that
232 /// it itself links against.
234 /// For example this returns `<sysroot>/lib` on Unix and `<sysroot>/bin` on
236 pub fn rustc_libdir(&self, compiler: Compiler) -> PathBuf {
237 if compiler.is_snapshot(self) {
238 self.build.rustc_snapshot_libdir()
240 self.sysroot(compiler).join(libdir(compiler.host))
244 /// Adds the compiler's directory of dynamic libraries to `cmd`'s dynamic
245 /// library lookup path.
246 pub fn add_rustc_lib_path(&self, compiler: Compiler, cmd: &mut Command) {
247 // Windows doesn't need dylib path munging because the dlls for the
248 // compiler live next to the compiler and the system will find them
254 add_lib_path(vec![self.rustc_libdir(compiler)], cmd);
257 /// Prepares an invocation of `cargo` to be run.
259 /// This will create a `Command` that represents a pending execution of
260 /// Cargo. This cargo will be configured to use `compiler` as the actual
261 /// rustc compiler, its output will be scoped by `mode`'s output directory,
262 /// it will pass the `--target` flag for the specified `target`, and will be
263 /// executing the Cargo command `cmd`.
264 pub fn cargo(&self, compiler: Compiler, mode: Mode, target: &str, cmd: &str) -> Command {
265 let build = self.build;
267 // Clear out the output we're about to generate if our compiler changed
269 let out_dir = build.cargo_out(compiler, mode, target);
270 build.clear_if_dirty(&out_dir, &self.rustc(compiler));
273 let mut cargo = Command::new(&build.initial_cargo);
274 let out_dir = build.stage_out(compiler, mode);
276 cargo.env("CARGO_TARGET_DIR", out_dir)
278 .arg("-j").arg(build.jobs().to_string())
279 .arg("--target").arg(target);
281 // FIXME: Temporary fix for https://github.com/rust-lang/cargo/issues/3005
282 // Force cargo to output binaries with disambiguating hashes in the name
283 cargo.env("__CARGO_DEFAULT_LIB_METADATA", &self.build.config.channel);
286 if compiler.stage == 0 && build.local_rebuild {
287 // Assume the local-rebuild rustc already has stage1 features.
290 stage = compiler.stage;
293 self.build.verbose(&format!("cargo using: {:?}", self.rustc(compiler)));
295 // Customize the compiler we're running. Specify the compiler to cargo
296 // as our shim and then pass it some various options used to configure
297 // how the actual compiler itbuild is called.
299 // These variables are primarily all read by
300 // src/bootstrap/bin/{rustc.rs,rustdoc.rs}
301 cargo.env("RUSTBUILD_NATIVE_DIR", build.native_dir(target))
302 .env("RUSTC", build.out.join("bootstrap/debug/rustc"))
303 .env("RUSTC_REAL", self.rustc(compiler))
304 .env("RUSTC_STAGE", stage.to_string())
305 .env("RUSTC_CODEGEN_UNITS",
306 build.config.rust_codegen_units.to_string())
307 .env("RUSTC_DEBUG_ASSERTIONS",
308 build.config.rust_debug_assertions.to_string())
309 .env("RUSTC_SYSROOT", self.sysroot(compiler))
310 .env("RUSTC_LIBDIR", self.rustc_libdir(compiler))
311 .env("RUSTC_RPATH", build.config.rust_rpath.to_string())
312 .env("RUSTDOC", build.out.join("bootstrap/debug/rustdoc"))
313 .env("RUSTDOC_REAL", self.rustdoc(compiler))
314 .env("RUSTC_FLAGS", build.rustc_flags(target).join(" "));
316 if mode != Mode::Tool {
317 // Tools don't get debuginfo right now, e.g. cargo and rls don't
318 // get compiled with debuginfo.
319 cargo.env("RUSTC_DEBUGINFO", build.config.rust_debuginfo.to_string())
320 .env("RUSTC_DEBUGINFO_LINES", build.config.rust_debuginfo_lines.to_string())
321 .env("RUSTC_FORCE_UNSTABLE", "1");
323 // Currently the compiler depends on crates from crates.io, and
324 // then other crates can depend on the compiler (e.g. proc-macro
325 // crates). Let's say, for example that rustc itbuild depends on the
326 // bitflags crate. If an external crate then depends on the
327 // bitflags crate as well, we need to make sure they don't
328 // conflict, even if they pick the same verison of bitflags. We'll
329 // want to make sure that e.g. a plugin and rustc each get their
330 // own copy of bitflags.
332 // Cargo ensures that this works in general through the -C metadata
333 // flag. This flag will frob the symbols in the binary to make sure
334 // they're different, even though the source code is the exact
335 // same. To solve this problem for the compiler we extend Cargo's
336 // already-passed -C metadata flag with our own. Our rustc.rs
337 // wrapper around the actual rustc will detect -C metadata being
338 // passed and frob it with this extra string we're passing in.
339 cargo.env("RUSTC_METADATA_SUFFIX", "rustc");
342 // Enable usage of unstable features
343 cargo.env("RUSTC_BOOTSTRAP", "1");
344 build.add_rust_test_threads(&mut cargo);
346 // Almost all of the crates that we compile as part of the bootstrap may
347 // have a build script, including the standard library. To compile a
348 // build script, however, it itbuild needs a standard library! This
349 // introduces a bit of a pickle when we're compiling the standard
352 // To work around this we actually end up using the snapshot compiler
353 // (stage0) for compiling build scripts of the standard library itbuild.
354 // The stage0 compiler is guaranteed to have a libstd available for use.
356 // For other crates, however, we know that we've already got a standard
357 // library up and running, so we can use the normal compiler to compile
358 // build scripts in that situation.
359 if mode == Mode::Libstd {
360 cargo.env("RUSTC_SNAPSHOT", &build.initial_rustc)
361 .env("RUSTC_SNAPSHOT_LIBDIR", build.rustc_snapshot_libdir());
363 cargo.env("RUSTC_SNAPSHOT", self.rustc(compiler))
364 .env("RUSTC_SNAPSHOT_LIBDIR", self.rustc_libdir(compiler));
367 // Ignore incremental modes except for stage0, since we're
368 // not guaranteeing correctness across builds if the compiler
369 // is changing under your feet.`
370 if build.flags.incremental && compiler.stage == 0 {
371 let incr_dir = build.incremental_dir(compiler);
372 cargo.env("RUSTC_INCREMENTAL", incr_dir);
375 if let Some(ref on_fail) = build.flags.on_fail {
376 cargo.env("RUSTC_ON_FAIL", on_fail);
379 cargo.env("RUSTC_VERBOSE", format!("{}", build.verbosity));
381 // Specify some various options for build scripts used throughout
384 // FIXME: the guard against msvc shouldn't need to be here
385 if !target.contains("msvc") {
386 cargo.env(format!("CC_{}", target), build.cc(target))
387 .env(format!("AR_{}", target), build.ar(target).unwrap()) // only msvc is None
388 .env(format!("CFLAGS_{}", target), build.cflags(target).join(" "));
390 if let Ok(cxx) = build.cxx(target) {
391 cargo.env(format!("CXX_{}", target), cxx);
395 if build.config.extended && compiler.is_final_stage(self) {
396 cargo.env("RUSTC_SAVE_ANALYSIS", "api".to_string());
399 // When being built Cargo will at some point call `nmake.exe` on Windows
400 // MSVC. Unfortunately `nmake` will read these two environment variables
401 // below and try to intepret them. We're likely being run, however, from
402 // MSYS `make` which uses the same variables.
404 // As a result, to prevent confusion and errors, we remove these
405 // variables from our environment to prevent passing MSYS make flags to
406 // nmake, causing it to blow up.
407 if cfg!(target_env = "msvc") {
408 cargo.env_remove("MAKE");
409 cargo.env_remove("MAKEFLAGS");
412 // Environment variables *required* throughout the build
414 // FIXME: should update code to not require this env var
415 cargo.env("CFG_COMPILER_HOST_TRIPLE", target);
417 if build.is_verbose() {
420 // FIXME: cargo bench does not accept `--release`
421 if build.config.rust_optimize && cmd != "bench" {
422 cargo.arg("--release");
424 if build.config.locked_deps {
425 cargo.arg("--locked");
427 if build.config.vendor || build.is_sudo {
428 cargo.arg("--frozen");
431 build.ci_env.force_coloring_in_ci(&mut cargo);
436 pub fn ensure<S: Step<'a> + Serialize>(&'a self, step: S) -> S::Output
440 let key = Cache::to_key(&step);
442 let mut stack = self.stack.borrow_mut();
443 if stack.contains(&key) {
444 let mut out = String::new();
445 out += &format!("\n\nCycle in build detected when adding {:?}\n", key);
446 for el in stack.iter().rev() {
447 out += &format!("\t{:?}\n", el);
451 if let Some(out) = self.cache.get::<S::Output>(&key) {
452 self.build.verbose(&format!("{}c {:?}", " ".repeat(stack.len()), key));
456 self.build.verbose(&format!("{}> {:?}", " ".repeat(stack.len()), key));
457 stack.push(key.clone());
459 let out = step.run(self);
461 let mut stack = self.stack.borrow_mut();
462 assert_eq!(stack.pop().as_ref(), Some(&key));
464 self.build.verbose(&format!("{}< {:?}", " ".repeat(self.stack.borrow().len()), key));
465 self.cache.put(key.clone(), &out);
466 self.cache.get::<S::Output>(&key).unwrap()