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 //! Various utility functions used throughout rustbuild.
13 //! Simple things like testing the various filesystem operations here and there,
14 //! not a lot of interesting happenings here unfortunately.
18 use std::io::{self, Write};
19 use std::path::{Path, PathBuf};
20 use std::process::Command;
21 use std::time::{SystemTime, Instant};
23 use filetime::{self, FileTime};
25 /// Returns the `name` as the filename of a static library for `target`.
26 pub fn staticlib(name: &str, target: &str) -> String {
27 if target.contains("windows") {
28 format!("{}.lib", name)
30 format!("lib{}.a", name)
34 /// Copies a file from `src` to `dst`
35 pub fn copy(src: &Path, dst: &Path) {
36 let _ = fs::remove_file(&dst);
37 // Attempt to "easy copy" by creating a hard link (symlinks don't work on
38 // windows), but if that fails just fall back to a slow `copy` operation.
39 if let Ok(()) = fs::hard_link(src, dst) {
42 if let Err(e) = fs::copy(src, dst) {
43 panic!("failed to copy `{}` to `{}`: {}", src.display(),
46 let metadata = t!(src.metadata());
47 t!(fs::set_permissions(dst, metadata.permissions()));
48 let atime = FileTime::from_last_access_time(&metadata);
49 let mtime = FileTime::from_last_modification_time(&metadata);
50 t!(filetime::set_file_times(dst, atime, mtime));
53 /// Copies the `src` directory recursively to `dst`. Both are assumed to exist
54 /// when this function is called.
55 pub fn cp_r(src: &Path, dst: &Path) {
56 for f in t!(fs::read_dir(src)) {
59 let name = path.file_name().unwrap();
60 let dst = dst.join(name);
61 if t!(f.file_type()).is_dir() {
62 t!(fs::create_dir_all(&dst));
65 let _ = fs::remove_file(&dst);
71 /// Copies the `src` directory recursively to `dst`. Both are assumed to exist
72 /// when this function is called. Unwanted files or directories can be skipped
73 /// by returning `false` from the filter function.
74 pub fn cp_filtered(src: &Path, dst: &Path, filter: &Fn(&Path) -> bool) {
75 // Inner function does the actual work
76 fn recurse(src: &Path, dst: &Path, relative: &Path, filter: &Fn(&Path) -> bool) {
77 for f in t!(fs::read_dir(src)) {
80 let name = path.file_name().unwrap();
81 let dst = dst.join(name);
82 let relative = relative.join(name);
83 // Only copy file or directory if the filter function returns true
84 if filter(&relative) {
85 if t!(f.file_type()).is_dir() {
86 let _ = fs::remove_dir_all(&dst);
87 t!(fs::create_dir(&dst));
88 recurse(&path, &dst, &relative, filter);
90 let _ = fs::remove_file(&dst);
96 // Immediately recurse with an empty relative path
97 recurse(src, dst, Path::new(""), filter)
100 /// Given an executable called `name`, return the filename for the
101 /// executable for a particular target.
102 pub fn exe(name: &str, target: &str) -> String {
103 if target.contains("windows") {
104 format!("{}.exe", name)
110 /// Returns whether the file name given looks like a dynamic library.
111 pub fn is_dylib(name: &str) -> bool {
112 name.ends_with(".dylib") || name.ends_with(".so") || name.ends_with(".dll")
115 /// Returns the corresponding relative library directory that the compiler's
116 /// dylibs will be found in.
117 pub fn libdir(target: &str) -> &'static str {
118 if target.contains("windows") {"bin"} else {"lib"}
121 /// Adds a list of lookup paths to `cmd`'s dynamic library lookup path.
122 pub fn add_lib_path(path: Vec<PathBuf>, cmd: &mut Command) {
123 let mut list = dylib_path();
125 list.insert(0, path);
127 cmd.env(dylib_path_var(), t!(env::join_paths(list)));
130 /// Returns the environment variable which the dynamic library lookup path
131 /// resides in for this platform.
132 pub fn dylib_path_var() -> &'static str {
133 if cfg!(target_os = "windows") {
135 } else if cfg!(target_os = "macos") {
137 } else if cfg!(target_os = "haiku") {
144 /// Parses the `dylib_path_var()` environment variable, returning a list of
145 /// paths that are members of this lookup path.
146 pub fn dylib_path() -> Vec<PathBuf> {
147 env::split_paths(&env::var_os(dylib_path_var()).unwrap_or_default()).collect()
150 /// `push` all components to `buf`. On windows, append `.exe` to the last component.
151 pub fn push_exe_path(mut buf: PathBuf, components: &[&str]) -> PathBuf {
152 let (&file, components) = components.split_last().expect("at least one component required");
153 let mut file = file.to_owned();
156 file.push_str(".exe");
159 for c in components {
168 pub struct TimeIt(Instant);
170 /// Returns an RAII structure that prints out how long it took to drop.
171 pub fn timeit() -> TimeIt {
172 TimeIt(Instant::now())
175 impl Drop for TimeIt {
177 let time = self.0.elapsed();
178 println!("\tfinished in {}.{:03}",
180 time.subsec_nanos() / 1_000_000);
184 /// Symlinks two directories, using junctions on Windows and normal symlinks on
186 pub fn symlink_dir(src: &Path, dest: &Path) -> io::Result<()> {
187 let _ = fs::remove_dir(dest);
188 return symlink_dir_inner(src, dest);
191 fn symlink_dir_inner(src: &Path, dest: &Path) -> io::Result<()> {
192 use std::os::unix::fs;
193 fs::symlink(src, dest)
196 // Creating a directory junction on windows involves dealing with reparse
197 // points and the DeviceIoControl function, and this code is a skeleton of
198 // what can be found here:
200 // http://www.flexhex.com/docs/articles/hard-links.phtml
205 fn symlink_dir_inner(target: &Path, junction: &Path) -> io::Result<()> {
208 use std::os::windows::ffi::OsStrExt;
210 const MAXIMUM_REPARSE_DATA_BUFFER_SIZE: usize = 16 * 1024;
211 const GENERIC_WRITE: DWORD = 0x40000000;
212 const OPEN_EXISTING: DWORD = 3;
213 const FILE_FLAG_OPEN_REPARSE_POINT: DWORD = 0x00200000;
214 const FILE_FLAG_BACKUP_SEMANTICS: DWORD = 0x02000000;
215 const FSCTL_SET_REPARSE_POINT: DWORD = 0x900a4;
216 const IO_REPARSE_TAG_MOUNT_POINT: DWORD = 0xa0000003;
217 const FILE_SHARE_DELETE: DWORD = 0x4;
218 const FILE_SHARE_READ: DWORD = 0x1;
219 const FILE_SHARE_WRITE: DWORD = 0x2;
223 type HANDLE = *mut u8;
224 type LPCWSTR = *const u16;
225 type LPDWORD = *mut DWORD;
226 type LPOVERLAPPED = *mut u8;
227 type LPSECURITY_ATTRIBUTES = *mut u8;
228 type LPVOID = *mut u8;
233 struct REPARSE_MOUNTPOINT_DATA_BUFFER {
235 ReparseDataLength: DWORD,
237 ReparseTargetLength: WORD,
238 ReparseTargetMaximumLength: WORD,
240 ReparseTarget: WCHAR,
244 fn CreateFileW(lpFileName: LPCWSTR,
245 dwDesiredAccess: DWORD,
247 lpSecurityAttributes: LPSECURITY_ATTRIBUTES,
248 dwCreationDisposition: DWORD,
249 dwFlagsAndAttributes: DWORD,
250 hTemplateFile: HANDLE)
252 fn DeviceIoControl(hDevice: HANDLE,
253 dwIoControlCode: DWORD,
255 nInBufferSize: DWORD,
257 nOutBufferSize: DWORD,
258 lpBytesReturned: LPDWORD,
259 lpOverlapped: LPOVERLAPPED) -> BOOL;
262 fn to_u16s<S: AsRef<OsStr>>(s: S) -> io::Result<Vec<u16>> {
263 Ok(s.as_ref().encode_wide().chain(Some(0)).collect())
266 // We're using low-level APIs to create the junction, and these are more
267 // picky about paths. For example, forward slashes cannot be used as a
268 // path separator, so we should try to canonicalize the path first.
269 let target = try!(fs::canonicalize(target));
271 try!(fs::create_dir(junction));
273 let path = try!(to_u16s(junction));
276 let h = CreateFileW(path.as_ptr(),
278 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
281 FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS,
284 let mut data = [0u8; MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
285 let db = data.as_mut_ptr()
286 as *mut REPARSE_MOUNTPOINT_DATA_BUFFER;
287 let buf = &mut (*db).ReparseTarget as *mut _;
289 // FIXME: this conversion is very hacky
291 let v = v.iter().map(|x| *x as u16);
292 for c in v.chain(target.as_os_str().encode_wide().skip(4)) {
298 (*db).ReparseTag = IO_REPARSE_TAG_MOUNT_POINT;
299 (*db).ReparseTargetMaximumLength = (i * 2) as WORD;
300 (*db).ReparseTargetLength = ((i - 1) * 2) as WORD;
301 (*db).ReparseDataLength =
302 (*db).ReparseTargetLength as DWORD + 12;
305 let res = DeviceIoControl(h as *mut _,
306 FSCTL_SET_REPARSE_POINT,
307 data.as_ptr() as *mut _,
308 (*db).ReparseDataLength + 8,
314 Err(io::Error::last_os_error())
322 /// An RAII structure that indicates all output until this instance is dropped
323 /// is part of the same group.
325 /// On Travis CI, these output will be folded by default, together with the
326 /// elapsed time in this block. This reduces noise from unnecessary logs,
327 /// allowing developers to quickly identify the error.
329 /// Travis CI supports folding by printing `travis_fold:start:<name>` and
330 /// `travis_fold:end:<name>` around the block. Time elapsed is recognized
331 /// similarly with `travis_time:[start|end]:<name>`. These are undocumented, but
332 /// can easily be deduced from source code of the [Travis build commands].
334 /// [Travis build commands]:
335 /// https://github.com/travis-ci/travis-build/blob/f603c0089/lib/travis/build/templates/header.sh
336 pub struct OutputFolder {
338 start_time: SystemTime, // we need SystemTime to get the UNIX timestamp.
342 /// Creates a new output folder with the given group name.
343 pub fn new(name: String) -> OutputFolder {
344 // "\r" moves the cursor to the beginning of the line, and "\x1b[0K" is
345 // the ANSI escape code to clear from the cursor to end of line.
346 // Travis seems to have trouble when _not_ using "\r\x1b[0K", that will
347 // randomly put lines to the top of the webpage.
348 print!("travis_fold:start:{0}\r\x1b[0Ktravis_time:start:{0}\r\x1b[0K", name);
351 start_time: SystemTime::now(),
356 impl Drop for OutputFolder {
361 fn to_nanos(duration: Result<Duration, SystemTimeError>) -> u64 {
363 Ok(d) => d.as_secs() * 1_000_000_000 + d.subsec_nanos() as u64,
368 let end_time = SystemTime::now();
369 let duration = end_time.duration_since(self.start_time);
370 let start = self.start_time.duration_since(UNIX_EPOCH);
371 let finish = end_time.duration_since(UNIX_EPOCH);
373 "travis_fold:end:{0}\r\x1b[0K\n\
374 travis_time:end:{0}:start={1},finish={2},duration={3}\r\x1b[0K",
380 io::stdout().flush().unwrap();
384 /// The CI environment rustbuild is running in. This mainly affects how the logs
386 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
388 /// Not a CI environment.
390 /// The Travis CI environment, for Linux (including Docker) and macOS builds.
392 /// The AppVeyor environment, for Windows builds.
397 /// Obtains the current CI environment.
398 pub fn current() -> CiEnv {
399 if env::var("TRAVIS").ok().map_or(false, |e| &*e == "true") {
401 } else if env::var("APPVEYOR").ok().map_or(false, |e| &*e == "True") {
408 /// If in a CI environment, forces the command to run with colors.
409 pub fn force_coloring_in_ci(self, cmd: &mut Command) {
410 if self != CiEnv::None {
411 // Due to use of stamp/docker, the output stream of rustbuild is not
412 // a TTY in CI, so coloring is by-default turned off.
413 // The explicit `TERM=xterm` environment is needed for
414 // `--color always` to actually work. This env var was lost when
415 // compiling through the Makefile. Very strange.
416 cmd.env("TERM", "xterm").args(&["--color", "always"]);