1 // Copyright 2015 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 //! Implementation of compiling various phases of the compiler and standard
14 //! This module contains some of the real meat in the rustbuild build system
15 //! which is where Cargo is used to compiler the standard library, libtest, and
16 //! compiler. This module is also responsible for assembling the sysroot as it
17 //! goes along from the output of the previous stage.
20 use std::fs::{self, File};
21 use std::io::BufReader;
22 use std::io::prelude::*;
23 use std::path::{Path, PathBuf};
24 use std::process::{Command, Stdio};
28 use build_helper::{output, mtime, up_to_date};
29 use filetime::FileTime;
32 use util::{exe, libdir, is_dylib, copy};
33 use {Build, Compiler, Mode};
36 use cache::{INTERNER, Interned};
37 use builder::{Step, RunConfig, ShouldRun, Builder};
39 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
41 pub target: Interned<String>,
42 pub compiler: Compiler,
47 const DEFAULT: bool = true;
49 fn should_run(run: ShouldRun) -> ShouldRun {
50 run.path("src/libstd").krate("std")
53 fn make_run(run: RunConfig) {
54 run.builder.ensure(Std {
55 compiler: run.builder.compiler(run.builder.top_stage, run.host),
60 /// Build the standard library.
62 /// This will build the standard library for a particular stage of the build
63 /// using the `compiler` targeting the `target` architecture. The artifacts
64 /// created will also be linked into the sysroot directory.
65 fn run(self, builder: &Builder) {
66 let build = builder.build;
67 let target = self.target;
68 let compiler = self.compiler;
70 builder.ensure(StartupObjects { compiler, target });
72 if build.force_use_stage1(compiler, target) {
73 let from = builder.compiler(1, build.build);
78 println!("Uplifting stage1 std ({} -> {})", from.host, target);
79 builder.ensure(StdLink {
81 target_compiler: compiler,
87 let _folder = build.fold_output(|| format!("stage{}-std", compiler.stage));
88 println!("Building stage{} std artifacts ({} -> {})", compiler.stage,
89 &compiler.host, target);
91 let out_dir = build.cargo_out(compiler, Mode::Libstd, target);
92 build.clear_if_dirty(&out_dir, &builder.rustc(compiler));
93 let mut cargo = builder.cargo(compiler, Mode::Libstd, target, "build");
94 let mut features = build.std_features();
96 if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") {
97 cargo.env("MACOSX_DEPLOYMENT_TARGET", target);
100 // When doing a local rebuild we tell cargo that we're stage1 rather than
101 // stage0. This works fine if the local rust and being-built rust have the
102 // same view of what the default allocator is, but fails otherwise. Since
103 // we don't have a way to express an allocator preference yet, work
104 // around the issue in the case of a local rebuild with jemalloc disabled.
105 if compiler.stage == 0 && build.local_rebuild && !build.config.use_jemalloc {
106 features.push_str(" force_alloc_system");
109 if compiler.stage != 0 && build.config.sanitizers {
110 // This variable is used by the sanitizer runtime crates, e.g.
111 // rustc_lsan, to build the sanitizer runtime from C code
112 // When this variable is missing, those crates won't compile the C code,
113 // so we don't set this variable during stage0 where llvm-config is
115 // We also only build the runtimes when --enable-sanitizers (or its
116 // config.toml equivalent) is used
117 cargo.env("LLVM_CONFIG", build.llvm_config(target));
120 cargo.arg("--features").arg(features)
121 .arg("--manifest-path")
122 .arg(build.src.join("src/libstd/Cargo.toml"));
124 if let Some(target) = build.config.target_config.get(&target) {
125 if let Some(ref jemalloc) = target.jemalloc {
126 cargo.env("JEMALLOC_OVERRIDE", jemalloc);
129 if target.contains("musl") {
130 if let Some(p) = build.musl_root(target) {
131 cargo.env("MUSL_ROOT", p);
137 &libstd_stamp(build, compiler, target));
139 builder.ensure(StdLink {
140 compiler: builder.compiler(compiler.stage, build.build),
141 target_compiler: compiler,
148 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
150 pub compiler: Compiler,
151 pub target_compiler: Compiler,
152 pub target: Interned<String>,
155 impl Step for StdLink {
158 fn should_run(run: ShouldRun) -> ShouldRun {
162 /// Link all libstd rlibs/dylibs into the sysroot location.
164 /// Links those artifacts generated by `compiler` to a the `stage` compiler's
165 /// sysroot for the specified `host` and `target`.
167 /// Note that this assumes that `compiler` has already generated the libstd
168 /// libraries for `target`, and this method will find them in the relevant
169 /// output directory.
170 fn run(self, builder: &Builder) {
171 let build = builder.build;
172 let compiler = self.compiler;
173 let target_compiler = self.target_compiler;
174 let target = self.target;
175 println!("Copying stage{} std from stage{} ({} -> {} / {})",
176 target_compiler.stage,
179 target_compiler.host,
181 let libdir = builder.sysroot_libdir(target_compiler, target);
182 add_to_sysroot(&libdir, &libstd_stamp(build, compiler, target));
184 if target.contains("musl") && !target.contains("mips") {
185 copy_musl_third_party_objects(build, target, &libdir);
188 if build.config.sanitizers && compiler.stage != 0 && target == "x86_64-apple-darwin" {
189 // The sanitizers are only built in stage1 or above, so the dylibs will
190 // be missing in stage0 and causes panic. See the `std()` function above
191 // for reason why the sanitizers are not built in stage0.
192 copy_apple_sanitizer_dylibs(&build.native_dir(target), "osx", &libdir);
197 /// Copies the crt(1,i,n).o startup objects
199 /// Only required for musl targets that statically link to libc
200 fn copy_musl_third_party_objects(build: &Build, target: Interned<String>, into: &Path) {
201 for &obj in &["crt1.o", "crti.o", "crtn.o"] {
202 copy(&build.musl_root(target).unwrap().join("lib").join(obj), &into.join(obj));
206 fn copy_apple_sanitizer_dylibs(native_dir: &Path, platform: &str, into: &Path) {
207 for &sanitizer in &["asan", "tsan"] {
208 let filename = format!("libclang_rt.{}_{}_dynamic.dylib", sanitizer, platform);
209 let mut src_path = native_dir.join(sanitizer);
210 src_path.push("build");
211 src_path.push("lib");
212 src_path.push("darwin");
213 src_path.push(&filename);
214 copy(&src_path, &into.join(filename));
218 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
219 pub struct StartupObjects {
220 pub compiler: Compiler,
221 pub target: Interned<String>,
224 impl Step for StartupObjects {
227 fn should_run(run: ShouldRun) -> ShouldRun {
228 run.path("src/rtstartup")
231 fn make_run(run: RunConfig) {
232 run.builder.ensure(StartupObjects {
233 compiler: run.builder.compiler(run.builder.top_stage, run.host),
238 /// Build and prepare startup objects like rsbegin.o and rsend.o
240 /// These are primarily used on Windows right now for linking executables/dlls.
241 /// They don't require any library support as they're just plain old object
242 /// files, so we just use the nightly snapshot compiler to always build them (as
243 /// no other compilers are guaranteed to be available).
244 fn run(self, builder: &Builder) {
245 let build = builder.build;
246 let for_compiler = self.compiler;
247 let target = self.target;
248 if !target.contains("pc-windows-gnu") {
252 let src_dir = &build.src.join("src/rtstartup");
253 let dst_dir = &build.native_dir(target).join("rtstartup");
254 let sysroot_dir = &builder.sysroot_libdir(for_compiler, target);
255 t!(fs::create_dir_all(dst_dir));
257 for file in &["rsbegin", "rsend"] {
258 let src_file = &src_dir.join(file.to_string() + ".rs");
259 let dst_file = &dst_dir.join(file.to_string() + ".o");
260 if !up_to_date(src_file, dst_file) {
261 let mut cmd = Command::new(&build.initial_rustc);
262 build.run(cmd.env("RUSTC_BOOTSTRAP", "1")
263 .arg("--cfg").arg("stage0")
264 .arg("--target").arg(target)
266 .arg("-o").arg(dst_file)
270 copy(dst_file, &sysroot_dir.join(file.to_string() + ".o"));
273 for obj in ["crt2.o", "dllcrt2.o"].iter() {
274 copy(&compiler_file(build.cc(target), obj), &sysroot_dir.join(obj));
279 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
281 pub compiler: Compiler,
282 pub target: Interned<String>,
287 const DEFAULT: bool = true;
289 fn should_run(run: ShouldRun) -> ShouldRun {
290 run.path("src/libtest").krate("test")
293 fn make_run(run: RunConfig) {
294 run.builder.ensure(Test {
295 compiler: run.builder.compiler(run.builder.top_stage, run.host),
302 /// This will build libtest and supporting libraries for a particular stage of
303 /// the build using the `compiler` targeting the `target` architecture. The
304 /// artifacts created will also be linked into the sysroot directory.
305 fn run(self, builder: &Builder) {
306 let build = builder.build;
307 let target = self.target;
308 let compiler = self.compiler;
310 builder.ensure(Std { compiler, target });
312 if build.force_use_stage1(compiler, target) {
313 builder.ensure(Test {
314 compiler: builder.compiler(1, build.build),
317 println!("Uplifting stage1 test ({} -> {})", &build.build, target);
318 builder.ensure(TestLink {
319 compiler: builder.compiler(1, build.build),
320 target_compiler: compiler,
326 let _folder = build.fold_output(|| format!("stage{}-test", compiler.stage));
327 println!("Building stage{} test artifacts ({} -> {})", compiler.stage,
328 &compiler.host, target);
329 let out_dir = build.cargo_out(compiler, Mode::Libtest, target);
330 build.clear_if_dirty(&out_dir, &libstd_stamp(build, compiler, target));
331 let mut cargo = builder.cargo(compiler, Mode::Libtest, target, "build");
332 if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") {
333 cargo.env("MACOSX_DEPLOYMENT_TARGET", target);
335 cargo.arg("--manifest-path")
336 .arg(build.src.join("src/libtest/Cargo.toml"));
339 &libtest_stamp(build, compiler, target));
341 builder.ensure(TestLink {
342 compiler: builder.compiler(compiler.stage, build.build),
343 target_compiler: compiler,
349 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
350 pub struct TestLink {
351 pub compiler: Compiler,
352 pub target_compiler: Compiler,
353 pub target: Interned<String>,
356 impl Step for TestLink {
359 fn should_run(run: ShouldRun) -> ShouldRun {
363 /// Same as `std_link`, only for libtest
364 fn run(self, builder: &Builder) {
365 let build = builder.build;
366 let compiler = self.compiler;
367 let target_compiler = self.target_compiler;
368 let target = self.target;
369 println!("Copying stage{} test from stage{} ({} -> {} / {})",
370 target_compiler.stage,
373 target_compiler.host,
375 add_to_sysroot(&builder.sysroot_libdir(target_compiler, target),
376 &libtest_stamp(build, compiler, target));
380 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
382 pub compiler: Compiler,
383 pub target: Interned<String>,
386 impl Step for Rustc {
388 const ONLY_HOSTS: bool = true;
389 const DEFAULT: bool = true;
391 fn should_run(run: ShouldRun) -> ShouldRun {
392 run.path("src/librustc").krate("rustc-main")
395 fn make_run(run: RunConfig) {
396 run.builder.ensure(Rustc {
397 compiler: run.builder.compiler(run.builder.top_stage, run.host),
402 /// Build the compiler.
404 /// This will build the compiler for a particular stage of the build using
405 /// the `compiler` targeting the `target` architecture. The artifacts
406 /// created will also be linked into the sysroot directory.
407 fn run(self, builder: &Builder) {
408 let build = builder.build;
409 let compiler = self.compiler;
410 let target = self.target;
412 builder.ensure(Test { compiler, target });
414 // Build LLVM for our target. This will implicitly build the host LLVM
416 builder.ensure(native::Llvm { target });
418 if build.force_use_stage1(compiler, target) {
419 builder.ensure(Rustc {
420 compiler: builder.compiler(1, build.build),
423 println!("Uplifting stage1 rustc ({} -> {})", &build.build, target);
424 builder.ensure(RustcLink {
425 compiler: builder.compiler(1, build.build),
426 target_compiler: compiler,
432 // Ensure that build scripts have a std to link against.
434 compiler: builder.compiler(self.compiler.stage, build.build),
438 let _folder = build.fold_output(|| format!("stage{}-rustc", compiler.stage));
439 println!("Building stage{} compiler artifacts ({} -> {})",
440 compiler.stage, &compiler.host, target);
442 let out_dir = build.cargo_out(compiler, Mode::Librustc, target);
443 build.clear_if_dirty(&out_dir, &libtest_stamp(build, compiler, target));
445 let mut cargo = builder.cargo(compiler, Mode::Librustc, target, "build");
446 cargo.arg("--features").arg(build.rustc_features())
447 .arg("--manifest-path")
448 .arg(build.src.join("src/rustc/Cargo.toml"));
450 // Set some configuration variables picked up by build scripts and
451 // the compiler alike
452 cargo.env("CFG_RELEASE", build.rust_release())
453 .env("CFG_RELEASE_CHANNEL", &build.config.channel)
454 .env("CFG_VERSION", build.rust_version())
455 .env("CFG_PREFIX", build.config.prefix.clone().unwrap_or_default());
457 if compiler.stage == 0 {
458 cargo.env("CFG_LIBDIR_RELATIVE", "lib");
460 let libdir_relative =
461 build.config.libdir_relative.clone().unwrap_or(PathBuf::from("lib"));
462 cargo.env("CFG_LIBDIR_RELATIVE", libdir_relative);
465 // If we're not building a compiler with debugging information then remove
466 // these two env vars which would be set otherwise.
467 if build.config.rust_debuginfo_only_std {
468 cargo.env_remove("RUSTC_DEBUGINFO");
469 cargo.env_remove("RUSTC_DEBUGINFO_LINES");
472 if let Some(ref ver_date) = build.rust_info.commit_date() {
473 cargo.env("CFG_VER_DATE", ver_date);
475 if let Some(ref ver_hash) = build.rust_info.sha() {
476 cargo.env("CFG_VER_HASH", ver_hash);
478 if !build.unstable_features() {
479 cargo.env("CFG_DISABLE_UNSTABLE_FEATURES", "1");
481 // Flag that rust llvm is in use
482 if build.is_rust_llvm(target) {
483 cargo.env("LLVM_RUSTLLVM", "1");
485 cargo.env("LLVM_CONFIG", build.llvm_config(target));
486 let target_config = build.config.target_config.get(&target);
487 if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) {
488 cargo.env("CFG_LLVM_ROOT", s);
490 // Building with a static libstdc++ is only supported on linux right now,
491 // not for MSVC or macOS
492 if build.config.llvm_static_stdcpp &&
493 !target.contains("windows") &&
494 !target.contains("apple") {
495 cargo.env("LLVM_STATIC_STDCPP",
496 compiler_file(build.cxx(target).unwrap(), "libstdc++.a"));
498 if build.config.llvm_link_shared {
499 cargo.env("LLVM_LINK_SHARED", "1");
501 if let Some(ref s) = build.config.rustc_default_linker {
502 cargo.env("CFG_DEFAULT_LINKER", s);
504 if let Some(ref s) = build.config.rustc_default_ar {
505 cargo.env("CFG_DEFAULT_AR", s);
509 &librustc_stamp(build, compiler, target));
511 builder.ensure(RustcLink {
512 compiler: builder.compiler(compiler.stage, build.build),
513 target_compiler: compiler,
519 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
521 pub compiler: Compiler,
522 pub target_compiler: Compiler,
523 pub target: Interned<String>,
526 impl Step for RustcLink {
529 fn should_run(run: ShouldRun) -> ShouldRun {
533 /// Same as `std_link`, only for librustc
534 fn run(self, builder: &Builder) {
535 let build = builder.build;
536 let compiler = self.compiler;
537 let target_compiler = self.target_compiler;
538 let target = self.target;
539 println!("Copying stage{} rustc from stage{} ({} -> {} / {})",
540 target_compiler.stage,
543 target_compiler.host,
545 add_to_sysroot(&builder.sysroot_libdir(target_compiler, target),
546 &librustc_stamp(build, compiler, target));
550 /// Cargo's output path for the standard library in a given stage, compiled
551 /// by a particular compiler for the specified target.
552 pub fn libstd_stamp(build: &Build, compiler: Compiler, target: Interned<String>) -> PathBuf {
553 build.cargo_out(compiler, Mode::Libstd, target).join(".libstd.stamp")
556 /// Cargo's output path for libtest in a given stage, compiled by a particular
557 /// compiler for the specified target.
558 pub fn libtest_stamp(build: &Build, compiler: Compiler, target: Interned<String>) -> PathBuf {
559 build.cargo_out(compiler, Mode::Libtest, target).join(".libtest.stamp")
562 /// Cargo's output path for librustc in a given stage, compiled by a particular
563 /// compiler for the specified target.
564 pub fn librustc_stamp(build: &Build, compiler: Compiler, target: Interned<String>) -> PathBuf {
565 build.cargo_out(compiler, Mode::Librustc, target).join(".librustc.stamp")
568 fn compiler_file(compiler: &Path, file: &str) -> PathBuf {
569 let out = output(Command::new(compiler)
570 .arg(format!("-print-file-name={}", file)));
571 PathBuf::from(out.trim())
574 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
576 pub compiler: Compiler,
579 impl Step for Sysroot {
580 type Output = Interned<PathBuf>;
582 fn should_run(run: ShouldRun) -> ShouldRun {
586 /// Returns the sysroot for the `compiler` specified that *this build system
589 /// That is, the sysroot for the stage0 compiler is not what the compiler
590 /// thinks it is by default, but it's the same as the default for stages
592 fn run(self, builder: &Builder) -> Interned<PathBuf> {
593 let build = builder.build;
594 let compiler = self.compiler;
595 let sysroot = if compiler.stage == 0 {
596 build.out.join(&compiler.host).join("stage0-sysroot")
598 build.out.join(&compiler.host).join(format!("stage{}", compiler.stage))
600 let _ = fs::remove_dir_all(&sysroot);
601 t!(fs::create_dir_all(&sysroot));
602 INTERNER.intern_path(sysroot)
606 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
607 pub struct Assemble {
608 /// The compiler which we will produce in this step. Assemble itself will
609 /// take care of ensuring that the necessary prerequisites to do so exist,
610 /// that is, this target can be a stage2 compiler and Assemble will build
611 /// previous stages for you.
612 pub target_compiler: Compiler,
615 impl Step for Assemble {
616 type Output = Compiler;
618 fn should_run(run: ShouldRun) -> ShouldRun {
619 run.path("src/rustc")
622 /// Prepare a new compiler from the artifacts in `stage`
624 /// This will assemble a compiler in `build/$host/stage$stage`. The compiler
625 /// must have been previously produced by the `stage - 1` build.build
627 fn run(self, builder: &Builder) -> Compiler {
628 let build = builder.build;
629 let target_compiler = self.target_compiler;
631 if target_compiler.stage == 0 {
632 assert_eq!(build.build, target_compiler.host,
633 "Cannot obtain compiler for non-native build triple at stage 0");
634 // The stage 0 compiler for the build triple is always pre-built.
635 return target_compiler;
638 // Get the compiler that we'll use to bootstrap ourselves.
639 let build_compiler = if target_compiler.host != build.build {
640 // Build a compiler for the host platform. We cannot use the stage0
641 // compiler for the host platform for this because it doesn't have
642 // the libraries we need. FIXME: Perhaps we should download those
643 // libraries? It would make builds faster...
644 // FIXME: It may be faster if we build just a stage 1
645 // compiler and then use that to bootstrap this compiler
647 builder.compiler(target_compiler.stage - 1, build.build)
649 // Build the compiler we'll use to build the stage requested. This
650 // may build more than one compiler (going down to stage 0).
651 builder.compiler(target_compiler.stage - 1, target_compiler.host)
654 // Build the libraries for this compiler to link to (i.e., the libraries
655 // it uses at runtime). NOTE: Crates the target compiler compiles don't
656 // link to these. (FIXME: Is that correct? It seems to be correct most
657 // of the time but I think we do link to these for stage2/bin compilers
658 // when not performing a full bootstrap).
659 if builder.build.flags.keep_stage.map_or(false, |s| target_compiler.stage <= s) {
660 builder.verbose("skipping compilation of compiler due to --keep-stage");
661 let compiler = build_compiler;
662 for stage in 0..min(target_compiler.stage, builder.flags.keep_stage.unwrap()) {
663 let target_compiler = builder.compiler(stage, target_compiler.host);
664 let target = target_compiler.host;
665 builder.ensure(StdLink { compiler, target_compiler, target });
666 builder.ensure(TestLink { compiler, target_compiler, target });
667 builder.ensure(RustcLink { compiler, target_compiler, target });
670 builder.ensure(Rustc { compiler: build_compiler, target: target_compiler.host });
673 let stage = target_compiler.stage;
674 let host = target_compiler.host;
675 println!("Assembling stage{} compiler ({})", stage, host);
677 // Link in all dylibs to the libdir
678 let sysroot = builder.sysroot(target_compiler);
679 let sysroot_libdir = sysroot.join(libdir(&*host));
680 t!(fs::create_dir_all(&sysroot_libdir));
681 let src_libdir = builder.sysroot_libdir(build_compiler, host);
682 for f in t!(fs::read_dir(&src_libdir)).map(|f| t!(f)) {
683 let filename = f.file_name().into_string().unwrap();
684 if is_dylib(&filename) {
685 copy(&f.path(), &sysroot_libdir.join(&filename));
689 let out_dir = build.cargo_out(build_compiler, Mode::Librustc, host);
691 // Link the compiler binary itself into place
692 let rustc = out_dir.join(exe("rustc", &*host));
693 let bindir = sysroot.join("bin");
694 t!(fs::create_dir_all(&bindir));
695 let compiler = builder.rustc(target_compiler);
696 let _ = fs::remove_file(&compiler);
697 copy(&rustc, &compiler);
699 // See if rustdoc exists to link it into place
700 let rustdoc = exe("rustdoc", &*host);
701 let rustdoc_src = out_dir.join(&rustdoc);
702 let rustdoc_dst = bindir.join(&rustdoc);
703 if fs::metadata(&rustdoc_src).is_ok() {
704 let _ = fs::remove_file(&rustdoc_dst);
705 copy(&rustdoc_src, &rustdoc_dst);
712 /// Link some files into a rustc sysroot.
714 /// For a particular stage this will link the file listed in `stamp` into the
715 /// `sysroot_dst` provided.
716 fn add_to_sysroot(sysroot_dst: &Path, stamp: &Path) {
717 t!(fs::create_dir_all(&sysroot_dst));
718 let mut contents = Vec::new();
719 t!(t!(File::open(stamp)).read_to_end(&mut contents));
720 // This is the method we use for extracting paths from the stamp file passed to us. See
721 // run_cargo for more information (in this file).
722 for part in contents.split(|b| *b == 0) {
726 let path = Path::new(t!(str::from_utf8(part)));
727 copy(&path, &sysroot_dst.join(path.file_name().unwrap()));
731 // Avoiding a dependency on winapi to keep compile times down
733 fn stderr_isatty() -> bool {
735 unsafe { libc::isatty(libc::STDERR_FILENO) != 0 }
738 fn stderr_isatty() -> bool {
741 type HANDLE = *mut u8;
742 const STD_ERROR_HANDLE: DWORD = -12i32 as DWORD;
744 fn GetStdHandle(which: DWORD) -> HANDLE;
745 fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: *mut DWORD) -> BOOL;
748 let handle = GetStdHandle(STD_ERROR_HANDLE);
750 GetConsoleMode(handle, &mut out) != 0
754 fn run_cargo(build: &Build, cargo: &mut Command, stamp: &Path) {
755 // Instruct Cargo to give us json messages on stdout, critically leaving
756 // stderr as piped so we can get those pretty colors.
757 cargo.arg("--message-format").arg("json")
758 .stdout(Stdio::piped());
761 // since we pass message-format=json to cargo, we need to tell the rustc
762 // wrapper to give us colored output if necessary. This is because we
763 // only want Cargo's JSON output, not rustcs.
764 cargo.env("RUSTC_COLOR", "1");
767 build.verbose(&format!("running: {:?}", cargo));
768 let mut child = match cargo.spawn() {
770 Err(e) => panic!("failed to execute command: {:?}\nerror: {}", cargo, e),
773 // `target_root_dir` looks like $dir/$target/release
774 let target_root_dir = stamp.parent().unwrap();
775 // `target_deps_dir` looks like $dir/$target/release/deps
776 let target_deps_dir = target_root_dir.join("deps");
777 // `host_root_dir` looks like $dir/release
778 let host_root_dir = target_root_dir.parent().unwrap() // chop off `release`
779 .parent().unwrap() // chop off `$target`
780 .join(target_root_dir.file_name().unwrap());
782 // Spawn Cargo slurping up its JSON output. We'll start building up the
783 // `deps` array of all files it generated along with a `toplevel` array of
784 // files we need to probe for later.
785 let mut deps = Vec::new();
786 let mut toplevel = Vec::new();
787 let stdout = BufReader::new(child.stdout.take().unwrap());
788 for line in stdout.lines() {
790 let json: serde_json::Value = if line.starts_with("{") {
791 t!(serde_json::from_str(&line))
793 // If this was informational, just print it out and continue
794 println!("{}", line);
797 if json["reason"].as_str() != Some("compiler-artifact") {
800 for filename in json["filenames"].as_array().unwrap() {
801 let filename = filename.as_str().unwrap();
802 // Skip files like executables
803 if !filename.ends_with(".rlib") &&
804 !filename.ends_with(".lib") &&
805 !is_dylib(&filename) {
809 let filename = Path::new(filename);
811 // If this was an output file in the "host dir" we don't actually
812 // worry about it, it's not relevant for us.
813 if filename.starts_with(&host_root_dir) {
817 // If this was output in the `deps` dir then this is a precise file
818 // name (hash included) so we start tracking it.
819 if filename.starts_with(&target_deps_dir) {
820 deps.push(filename.to_path_buf());
824 // Otherwise this was a "top level artifact" which right now doesn't
825 // have a hash in the name, but there's a version of this file in
826 // the `deps` folder which *does* have a hash in the name. That's
827 // the one we'll want to we'll probe for it later.
828 toplevel.push((filename.file_stem().unwrap()
829 .to_str().unwrap().to_string(),
830 filename.extension().unwrap().to_owned()
831 .to_str().unwrap().to_string()));
835 // Make sure Cargo actually succeeded after we read all of its stdout.
836 let status = t!(child.wait());
837 if !status.success() {
838 panic!("command did not execute successfully: {:?}\n\
839 expected success, got: {}",
844 // Ok now we need to actually find all the files listed in `toplevel`. We've
845 // got a list of prefix/extensions and we basically just need to find the
846 // most recent file in the `deps` folder corresponding to each one.
847 let contents = t!(target_deps_dir.read_dir())
849 .map(|e| (e.path(), e.file_name().into_string().unwrap(), t!(e.metadata())))
850 .collect::<Vec<_>>();
851 for (prefix, extension) in toplevel {
852 let candidates = contents.iter().filter(|&&(_, ref filename, _)| {
853 filename.starts_with(&prefix[..]) &&
854 filename[prefix.len()..].starts_with("-") &&
855 filename.ends_with(&extension[..])
857 let max = candidates.max_by_key(|&&(_, _, ref metadata)| {
858 FileTime::from_last_modification_time(metadata)
860 let path_to_add = match max {
861 Some(triple) => triple.0.to_str().unwrap(),
862 None => panic!("no output generated for {:?} {:?}", prefix, extension),
864 if is_dylib(path_to_add) {
865 let candidate = format!("{}.lib", path_to_add);
866 let candidate = PathBuf::from(candidate);
867 if candidate.exists() {
868 deps.push(candidate);
871 deps.push(path_to_add.into());
874 // Now we want to update the contents of the stamp file, if necessary. First
875 // we read off the previous contents along with its mtime. If our new
876 // contents (the list of files to copy) is different or if any dep's mtime
877 // is newer then we rewrite the stamp file.
879 let mut stamp_contents = Vec::new();
880 if let Ok(mut f) = File::open(stamp) {
881 t!(f.read_to_end(&mut stamp_contents));
883 let stamp_mtime = mtime(&stamp);
884 let mut new_contents = Vec::new();
886 let mut max_path = None;
888 let mtime = mtime(&dep);
889 if Some(mtime) > max {
891 max_path = Some(dep.clone());
893 new_contents.extend(dep.to_str().unwrap().as_bytes());
894 new_contents.extend(b"\0");
896 let max = max.unwrap();
897 let max_path = max_path.unwrap();
898 if stamp_contents == new_contents && max <= stamp_mtime {
901 if max > stamp_mtime {
902 build.verbose(&format!("updating {:?} as {:?} changed", stamp, max_path));
904 build.verbose(&format!("updating {:?} as deps changed", stamp));
906 t!(t!(File::create(stamp)).write_all(&new_contents));