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 ($self:ident, $paths:ident, $($rule:ty),+ $(,)*) => {{
89 $self.maybe_run::<$rule>(None);
95 if <$rule>::should_run($self, path) {
96 $self.maybe_run::<$rule>(Some(path));
104 impl<'a> Builder<'a> {
105 pub fn run(build: &Build) {
106 let (kind, paths) = match build.flags.cmd {
107 Subcommand::Build { ref paths } => (Kind::Build, &paths[..]),
108 Subcommand::Doc { ref paths } => (Kind::Doc, &paths[..]),
109 Subcommand::Test { ref paths, .. } => (Kind::Test, &paths[..]),
110 Subcommand::Bench { ref paths, .. } => (Kind::Bench, &paths[..]),
111 Subcommand::Dist { ref paths } => (Kind::Dist, &paths[..]),
112 Subcommand::Install { ref paths } => (Kind::Install, &paths[..]),
113 Subcommand::Clean => panic!(),
116 let builder = Builder {
118 top_stage: build.flags.stage.unwrap_or(2),
121 stack: RefCell::new(Vec::new()),
124 let builder = &builder;
126 Kind::Build => check!(builder, paths, compile::Std, compile::Test, compile::Rustc,
127 compile::StartupObjects),
128 Kind::Test => check!(builder, paths, check::Tidy, check::Bootstrap, check::Compiletest,
129 check::Krate, check::KrateLibrustc, check::Linkcheck, check::Cargotest,
130 check::Cargo, check::Docs, check::ErrorIndex, check::Distcheck),
131 Kind::Bench => check!(builder, paths, check::Krate, check::KrateLibrustc),
132 Kind::Doc => builder.default_doc(Some(paths)),
133 Kind::Dist => check!(builder, paths, dist::Docs, dist::Mingw, dist::Rustc,
134 dist::DebuggerScripts, dist::Std, dist::Analysis, dist::Src,
135 dist::PlainSourceTarball, dist::Cargo, dist::Rls, dist::Extended, dist::HashSign),
136 Kind::Install => check!(builder, paths, install::Docs, install::Std, install::Cargo,
137 install::Rls, install::Analysis, install::Src, install::Rustc),
141 pub fn default_doc(&self, paths: Option<&[PathBuf]>) {
142 let paths = paths.unwrap_or(&[]);
143 check!(self, paths, doc::UnstableBook, doc::UnstableBookGen, doc::Rustbook, doc::TheBook,
144 doc::Standalone, doc::Std, doc::Test, doc::Rustc, doc::ErrorIndex,
145 doc::Nomicon, doc::Reference);
148 pub fn compiler(&'a self, stage: u32, host: &'a str) -> Compiler<'a> {
149 self.ensure(compile::Assemble { target_compiler: Compiler { stage, host } })
152 pub fn sysroot(&self, compiler: Compiler<'a>) -> PathBuf {
153 self.ensure(compile::Sysroot { compiler })
156 /// Returns the libdir where the standard library and other artifacts are
157 /// found for a compiler's sysroot.
158 pub fn sysroot_libdir(&self, compiler: Compiler<'a>, target: &'a str) -> PathBuf {
161 compiler: Compiler<'a>,
164 impl<'a> Step<'a> for Libdir<'a> {
165 type Output = PathBuf;
166 fn run(self, builder: &Builder) -> PathBuf {
167 let sysroot = builder.sysroot(self.compiler)
168 .join("lib").join("rustlib").join(self.target).join("lib");
169 let _ = fs::remove_dir_all(&sysroot);
170 t!(fs::create_dir_all(&sysroot));
174 self.ensure(Libdir { compiler, target })
177 /// Returns the compiler's libdir where it stores the dynamic libraries that
178 /// it itself links against.
180 /// For example this returns `<sysroot>/lib` on Unix and `<sysroot>/bin` on
182 pub fn rustc_libdir(&self, compiler: Compiler) -> PathBuf {
183 if compiler.is_snapshot(self) {
184 self.build.rustc_snapshot_libdir()
186 self.sysroot(compiler).join(libdir(compiler.host))
190 /// Adds the compiler's directory of dynamic libraries to `cmd`'s dynamic
191 /// library lookup path.
192 pub fn add_rustc_lib_path(&self, compiler: Compiler, cmd: &mut Command) {
193 // Windows doesn't need dylib path munging because the dlls for the
194 // compiler live next to the compiler and the system will find them
200 add_lib_path(vec![self.rustc_libdir(compiler)], cmd);
203 /// Get a path to the compiler specified.
204 pub fn rustc(&self, compiler: Compiler) -> PathBuf {
205 if compiler.is_snapshot(self) {
206 self.initial_rustc.clone()
208 self.sysroot(compiler).join("bin").join(exe("rustc", compiler.host))
212 /// Get the `rustdoc` executable next to the specified compiler
213 pub fn rustdoc(&self, compiler: Compiler) -> PathBuf {
214 let mut rustdoc = self.rustc(compiler);
216 rustdoc.push(exe("rustdoc", compiler.host));
220 /// Prepares an invocation of `cargo` to be run.
222 /// This will create a `Command` that represents a pending execution of
223 /// Cargo. This cargo will be configured to use `compiler` as the actual
224 /// rustc compiler, its output will be scoped by `mode`'s output directory,
225 /// it will pass the `--target` flag for the specified `target`, and will be
226 /// executing the Cargo command `cmd`.
231 cmd: &str) -> Command {
232 let mut cargo = Command::new(&self.initial_cargo);
233 let out_dir = self.stage_out(compiler, mode);
234 cargo.env("CARGO_TARGET_DIR", out_dir)
236 .arg("-j").arg(self.jobs().to_string())
237 .arg("--target").arg(target);
239 // FIXME: Temporary fix for https://github.com/rust-lang/cargo/issues/3005
240 // Force cargo to output binaries with disambiguating hashes in the name
241 cargo.env("__CARGO_DEFAULT_LIB_METADATA", &self.config.channel);
244 if compiler.stage == 0 && self.local_rebuild {
245 // Assume the local-rebuild rustc already has stage1 features.
248 stage = compiler.stage;
251 // Customize the compiler we're running. Specify the compiler to cargo
252 // as our shim and then pass it some various options used to configure
253 // how the actual compiler itself is called.
255 // These variables are primarily all read by
256 // src/bootstrap/bin/{rustc.rs,rustdoc.rs}
257 cargo.env("RUSTBUILD_NATIVE_DIR", self.native_dir(target))
258 .env("RUSTC", self.out.join("bootstrap/debug/rustc"))
259 .env("RUSTC_REAL", self.rustc(compiler))
260 .env("RUSTC_STAGE", stage.to_string())
261 .env("RUSTC_CODEGEN_UNITS",
262 self.config.rust_codegen_units.to_string())
263 .env("RUSTC_DEBUG_ASSERTIONS",
264 self.config.rust_debug_assertions.to_string())
265 .env("RUSTC_SYSROOT", self.sysroot(compiler))
266 .env("RUSTC_LIBDIR", self.rustc_libdir(compiler))
267 .env("RUSTC_RPATH", self.config.rust_rpath.to_string())
268 .env("RUSTDOC", self.out.join("bootstrap/debug/rustdoc"))
269 .env("RUSTDOC_REAL", self.rustdoc(compiler))
270 .env("RUSTC_FLAGS", self.rustc_flags(target).join(" "));
272 if mode != Mode::Tool {
273 // Tools don't get debuginfo right now, e.g. cargo and rls don't
274 // get compiled with debuginfo.
275 cargo.env("RUSTC_DEBUGINFO", self.config.rust_debuginfo.to_string())
276 .env("RUSTC_DEBUGINFO_LINES", self.config.rust_debuginfo_lines.to_string())
277 .env("RUSTC_FORCE_UNSTABLE", "1");
279 // Currently the compiler depends on crates from crates.io, and
280 // then other crates can depend on the compiler (e.g. proc-macro
281 // crates). Let's say, for example that rustc itself depends on the
282 // bitflags crate. If an external crate then depends on the
283 // bitflags crate as well, we need to make sure they don't
284 // conflict, even if they pick the same verison of bitflags. We'll
285 // want to make sure that e.g. a plugin and rustc each get their
286 // own copy of bitflags.
288 // Cargo ensures that this works in general through the -C metadata
289 // flag. This flag will frob the symbols in the binary to make sure
290 // they're different, even though the source code is the exact
291 // same. To solve this problem for the compiler we extend Cargo's
292 // already-passed -C metadata flag with our own. Our rustc.rs
293 // wrapper around the actual rustc will detect -C metadata being
294 // passed and frob it with this extra string we're passing in.
295 cargo.env("RUSTC_METADATA_SUFFIX", "rustc");
298 // Enable usage of unstable features
299 cargo.env("RUSTC_BOOTSTRAP", "1");
300 self.add_rust_test_threads(&mut cargo);
302 // Almost all of the crates that we compile as part of the bootstrap may
303 // have a build script, including the standard library. To compile a
304 // build script, however, it itself needs a standard library! This
305 // introduces a bit of a pickle when we're compiling the standard
308 // To work around this we actually end up using the snapshot compiler
309 // (stage0) for compiling build scripts of the standard library itself.
310 // The stage0 compiler is guaranteed to have a libstd available for use.
312 // For other crates, however, we know that we've already got a standard
313 // library up and running, so we can use the normal compiler to compile
314 // build scripts in that situation.
315 if mode == Mode::Libstd {
316 cargo.env("RUSTC_SNAPSHOT", &self.initial_rustc)
317 .env("RUSTC_SNAPSHOT_LIBDIR", self.rustc_snapshot_libdir());
319 cargo.env("RUSTC_SNAPSHOT", self.rustc(compiler))
320 .env("RUSTC_SNAPSHOT_LIBDIR", self.rustc_libdir(compiler));
323 // Ignore incremental modes except for stage0, since we're
324 // not guaranteeing correctness across builds if the compiler
325 // is changing under your feet.`
326 if self.flags.incremental && compiler.stage == 0 {
327 let incr_dir = self.incremental_dir(compiler);
328 cargo.env("RUSTC_INCREMENTAL", incr_dir);
331 if let Some(ref on_fail) = self.flags.on_fail {
332 cargo.env("RUSTC_ON_FAIL", on_fail);
335 cargo.env("RUSTC_VERBOSE", format!("{}", self.verbosity));
337 // Specify some various options for build scripts used throughout
340 // FIXME: the guard against msvc shouldn't need to be here
341 if !target.contains("msvc") {
342 cargo.env(format!("CC_{}", target), self.cc(target))
343 .env(format!("AR_{}", target), self.ar(target).unwrap()) // only msvc is None
344 .env(format!("CFLAGS_{}", target), self.cflags(target).join(" "));
346 if let Ok(cxx) = self.cxx(target) {
347 cargo.env(format!("CXX_{}", target), cxx);
351 if mode == Mode::Libstd && self.config.extended && compiler.is_final_stage(self) {
352 cargo.env("RUSTC_SAVE_ANALYSIS", "api".to_string());
355 // When being built Cargo will at some point call `nmake.exe` on Windows
356 // MSVC. Unfortunately `nmake` will read these two environment variables
357 // below and try to intepret them. We're likely being run, however, from
358 // MSYS `make` which uses the same variables.
360 // As a result, to prevent confusion and errors, we remove these
361 // variables from our environment to prevent passing MSYS make flags to
362 // nmake, causing it to blow up.
363 if cfg!(target_env = "msvc") {
364 cargo.env_remove("MAKE");
365 cargo.env_remove("MAKEFLAGS");
368 // Environment variables *required* throughout the build
370 // FIXME: should update code to not require this env var
371 cargo.env("CFG_COMPILER_HOST_TRIPLE", target);
373 if self.is_verbose() {
376 // FIXME: cargo bench does not accept `--release`
377 if self.config.rust_optimize && cmd != "bench" {
378 cargo.arg("--release");
380 if self.config.locked_deps {
381 cargo.arg("--locked");
383 if self.config.vendor || self.is_sudo {
384 cargo.arg("--frozen");
387 self.ci_env.force_coloring_in_ci(&mut cargo);
392 fn maybe_run<S: Step<'a>>(&'a self, path: Option<&Path>) {
393 let build = self.build;
394 let hosts = if S::ONLY_BUILD_TARGETS || S::ONLY_BUILD {
395 &build.config.host[..1]
400 // Determine the actual targets participating in this rule.
401 // NOTE: We should keep the full projection from build triple to
402 // the hosts for the dist steps, now that the hosts array above is
403 // truncated to avoid duplication of work in that case. Therefore
404 // the original non-shadowed hosts array is used below.
405 let targets = if S::ONLY_HOSTS {
406 // If --target was specified but --host wasn't specified,
407 // don't run any host-only tests. Also, respect any `--host`
408 // overrides as done for `hosts`.
409 if build.flags.host.len() > 0 {
410 &build.flags.host[..]
411 } else if build.flags.target.len() > 0 {
413 } else if S::ONLY_BUILD {
414 &build.config.host[..1]
416 &build.config.host[..]
423 for target in targets {
424 S::make_run(self, path, host, target);
429 pub fn ensure<S: Step<'a> + Serialize>(&'a self, step: S) -> S::Output
433 let key = Cache::to_key(&step);
435 let mut stack = self.stack.borrow_mut();
436 if stack.contains(&key) {
437 let mut out = String::new();
438 out += &format!("\n\nCycle in build detected when adding {:?}\n", key);
439 for el in stack.iter().rev() {
440 out += &format!("\t{:?}\n", el);
444 if let Some(out) = self.cache.get::<S::Output>(&key) {
445 self.build.verbose(&format!("{}c {:?}", " ".repeat(stack.len()), key));
449 self.build.verbose(&format!("{}> {:?}", " ".repeat(stack.len()), key));
450 stack.push(key.clone());
452 let out = step.run(self);
454 let mut stack = self.stack.borrow_mut();
455 assert_eq!(stack.pop().as_ref(), Some(&key));
457 self.build.verbose(&format!("{}< {:?}", " ".repeat(self.stack.borrow().len()), key));
458 self.cache.put(key.clone(), &out);
459 self.cache.get::<S::Output>(&key).unwrap()