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 let res = fs::copy(src, dst);
39 panic!("failed to copy `{}` to `{}`: {}", src.display(),
42 let metadata = t!(src.metadata());
43 t!(fs::set_permissions(dst, metadata.permissions()));
44 let atime = FileTime::from_last_access_time(&metadata);
45 let mtime = FileTime::from_last_modification_time(&metadata);
46 t!(filetime::set_file_times(dst, atime, mtime));
50 /// Copies the `src` directory recursively to `dst`. Both are assumed to exist
51 /// when this function is called.
52 pub fn cp_r(src: &Path, dst: &Path) {
53 for f in t!(fs::read_dir(src)) {
56 let name = path.file_name().unwrap();
57 let dst = dst.join(name);
58 if t!(f.file_type()).is_dir() {
59 t!(fs::create_dir_all(&dst));
62 let _ = fs::remove_file(&dst);
68 /// Copies the `src` directory recursively to `dst`. Both are assumed to exist
69 /// when this function is called. Unwanted files or directories can be skipped
70 /// by returning `false` from the filter function.
71 pub fn cp_filtered(src: &Path, dst: &Path, filter: &Fn(&Path) -> bool) {
72 // Inner function does the actual work
73 fn recurse(src: &Path, dst: &Path, relative: &Path, filter: &Fn(&Path) -> bool) {
74 for f in t!(fs::read_dir(src)) {
77 let name = path.file_name().unwrap();
78 let dst = dst.join(name);
79 let relative = relative.join(name);
80 // Only copy file or directory if the filter function returns true
81 if filter(&relative) {
82 if t!(f.file_type()).is_dir() {
83 let _ = fs::remove_dir_all(&dst);
84 t!(fs::create_dir(&dst));
85 recurse(&path, &dst, &relative, filter);
87 let _ = fs::remove_file(&dst);
93 // Immediately recurse with an empty relative path
94 recurse(src, dst, Path::new(""), filter)
97 /// Given an executable called `name`, return the filename for the
98 /// executable for a particular target.
99 pub fn exe(name: &str, target: &str) -> String {
100 if target.contains("windows") {
101 format!("{}.exe", name)
107 /// Returns whether the file name given looks like a dynamic library.
108 pub fn is_dylib(name: &str) -> bool {
109 name.ends_with(".dylib") || name.ends_with(".so") || name.ends_with(".dll")
112 /// Returns the corresponding relative library directory that the compiler's
113 /// dylibs will be found in.
114 pub fn libdir(target: &str) -> &'static str {
115 if target.contains("windows") {"bin"} else {"lib"}
118 /// Adds a list of lookup paths to `cmd`'s dynamic library lookup path.
119 pub fn add_lib_path(path: Vec<PathBuf>, cmd: &mut Command) {
120 let mut list = dylib_path();
122 list.insert(0, path);
124 cmd.env(dylib_path_var(), t!(env::join_paths(list)));
127 /// Returns the environment variable which the dynamic library lookup path
128 /// resides in for this platform.
129 pub fn dylib_path_var() -> &'static str {
130 if cfg!(target_os = "windows") {
132 } else if cfg!(target_os = "macos") {
134 } else if cfg!(target_os = "haiku") {
141 /// Parses the `dylib_path_var()` environment variable, returning a list of
142 /// paths that are members of this lookup path.
143 pub fn dylib_path() -> Vec<PathBuf> {
144 env::split_paths(&env::var_os(dylib_path_var()).unwrap_or_default()).collect()
147 /// `push` all components to `buf`. On windows, append `.exe` to the last component.
148 pub fn push_exe_path(mut buf: PathBuf, components: &[&str]) -> PathBuf {
149 let (&file, components) = components.split_last().expect("at least one component required");
150 let mut file = file.to_owned();
153 file.push_str(".exe");
156 for c in components {
165 pub struct TimeIt(Instant);
167 /// Returns an RAII structure that prints out how long it took to drop.
168 pub fn timeit() -> TimeIt {
169 TimeIt(Instant::now())
172 impl Drop for TimeIt {
174 let time = self.0.elapsed();
175 println!("\tfinished in {}.{:03}",
177 time.subsec_nanos() / 1_000_000);
181 /// Symlinks two directories, using junctions on Windows and normal symlinks on
183 pub fn symlink_dir(src: &Path, dest: &Path) -> io::Result<()> {
184 let _ = fs::remove_dir(dest);
185 return symlink_dir_inner(src, dest);
188 fn symlink_dir_inner(src: &Path, dest: &Path) -> io::Result<()> {
189 use std::os::unix::fs;
190 fs::symlink(src, dest)
193 // Creating a directory junction on windows involves dealing with reparse
194 // points and the DeviceIoControl function, and this code is a skeleton of
195 // what can be found here:
197 // http://www.flexhex.com/docs/articles/hard-links.phtml
202 fn symlink_dir_inner(target: &Path, junction: &Path) -> io::Result<()> {
205 use std::os::windows::ffi::OsStrExt;
207 const MAXIMUM_REPARSE_DATA_BUFFER_SIZE: usize = 16 * 1024;
208 const GENERIC_WRITE: DWORD = 0x40000000;
209 const OPEN_EXISTING: DWORD = 3;
210 const FILE_FLAG_OPEN_REPARSE_POINT: DWORD = 0x00200000;
211 const FILE_FLAG_BACKUP_SEMANTICS: DWORD = 0x02000000;
212 const FSCTL_SET_REPARSE_POINT: DWORD = 0x900a4;
213 const IO_REPARSE_TAG_MOUNT_POINT: DWORD = 0xa0000003;
214 const FILE_SHARE_DELETE: DWORD = 0x4;
215 const FILE_SHARE_READ: DWORD = 0x1;
216 const FILE_SHARE_WRITE: DWORD = 0x2;
220 type HANDLE = *mut u8;
221 type LPCWSTR = *const u16;
222 type LPDWORD = *mut DWORD;
223 type LPOVERLAPPED = *mut u8;
224 type LPSECURITY_ATTRIBUTES = *mut u8;
225 type LPVOID = *mut u8;
230 struct REPARSE_MOUNTPOINT_DATA_BUFFER {
232 ReparseDataLength: DWORD,
234 ReparseTargetLength: WORD,
235 ReparseTargetMaximumLength: WORD,
237 ReparseTarget: WCHAR,
241 fn CreateFileW(lpFileName: LPCWSTR,
242 dwDesiredAccess: DWORD,
244 lpSecurityAttributes: LPSECURITY_ATTRIBUTES,
245 dwCreationDisposition: DWORD,
246 dwFlagsAndAttributes: DWORD,
247 hTemplateFile: HANDLE)
249 fn DeviceIoControl(hDevice: HANDLE,
250 dwIoControlCode: DWORD,
252 nInBufferSize: DWORD,
254 nOutBufferSize: DWORD,
255 lpBytesReturned: LPDWORD,
256 lpOverlapped: LPOVERLAPPED) -> BOOL;
259 fn to_u16s<S: AsRef<OsStr>>(s: S) -> io::Result<Vec<u16>> {
260 Ok(s.as_ref().encode_wide().chain(Some(0)).collect())
263 // We're using low-level APIs to create the junction, and these are more
264 // picky about paths. For example, forward slashes cannot be used as a
265 // path separator, so we should try to canonicalize the path first.
266 let target = try!(fs::canonicalize(target));
268 try!(fs::create_dir(junction));
270 let path = try!(to_u16s(junction));
273 let h = CreateFileW(path.as_ptr(),
275 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
278 FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS,
281 let mut data = [0u8; MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
282 let db = data.as_mut_ptr()
283 as *mut REPARSE_MOUNTPOINT_DATA_BUFFER;
284 let buf = &mut (*db).ReparseTarget as *mut _;
286 // FIXME: this conversion is very hacky
288 let v = v.iter().map(|x| *x as u16);
289 for c in v.chain(target.as_os_str().encode_wide().skip(4)) {
295 (*db).ReparseTag = IO_REPARSE_TAG_MOUNT_POINT;
296 (*db).ReparseTargetMaximumLength = (i * 2) as WORD;
297 (*db).ReparseTargetLength = ((i - 1) * 2) as WORD;
298 (*db).ReparseDataLength =
299 (*db).ReparseTargetLength as DWORD + 12;
302 let res = DeviceIoControl(h as *mut _,
303 FSCTL_SET_REPARSE_POINT,
304 data.as_ptr() as *mut _,
305 (*db).ReparseDataLength + 8,
311 Err(io::Error::last_os_error())
319 /// An RAII structure that indicates all output until this instance is dropped
320 /// is part of the same group.
322 /// On Travis CI, these output will be folded by default, together with the
323 /// elapsed time in this block. This reduces noise from unnecessary logs,
324 /// allowing developers to quickly identify the error.
326 /// Travis CI supports folding by printing `travis_fold:start:<name>` and
327 /// `travis_fold:end:<name>` around the block. Time elapsed is recognized
328 /// similarly with `travis_time:[start|end]:<name>`. These are undocumented, but
329 /// can easily be deduced from source code of the [Travis build commands].
331 /// [Travis build commands]:
332 /// https://github.com/travis-ci/travis-build/blob/f603c0089/lib/travis/build/templates/header.sh
333 pub struct OutputFolder {
335 start_time: SystemTime, // we need SystemTime to get the UNIX timestamp.
339 /// Creates a new output folder with the given group name.
340 pub fn new(name: String) -> OutputFolder {
341 // "\r" moves the cursor to the beginning of the line, and "\x1b[0K" is
342 // the ANSI escape code to clear from the cursor to end of line.
343 // Travis seems to have trouble when _not_ using "\r\x1b[0K", that will
344 // randomly put lines to the top of the webpage.
345 print!("travis_fold:start:{0}\r\x1b[0Ktravis_time:start:{0}\r\x1b[0K", name);
348 start_time: SystemTime::now(),
353 impl Drop for OutputFolder {
358 fn to_nanos(duration: Result<Duration, SystemTimeError>) -> u64 {
360 Ok(d) => d.as_secs() * 1_000_000_000 + d.subsec_nanos() as u64,
365 let end_time = SystemTime::now();
366 let duration = end_time.duration_since(self.start_time);
367 let start = self.start_time.duration_since(UNIX_EPOCH);
368 let finish = end_time.duration_since(UNIX_EPOCH);
370 "travis_fold:end:{0}\r\x1b[0K\n\
371 travis_time:end:{0}:start={1},finish={2},duration={3}\r\x1b[0K",
377 io::stdout().flush().unwrap();
381 /// The CI environment rustbuild is running in. This mainly affects how the logs
383 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
385 /// Not a CI environment.
387 /// The Travis CI environment, for Linux (including Docker) and macOS builds.
389 /// The AppVeyor environment, for Windows builds.
394 /// Obtains the current CI environment.
395 pub fn current() -> CiEnv {
396 if env::var("TRAVIS").ok().map_or(false, |e| &*e == "true") {
398 } else if env::var("APPVEYOR").ok().map_or(false, |e| &*e == "True") {
405 /// If in a CI environment, forces the command to run with colors.
406 pub fn force_coloring_in_ci(self, cmd: &mut Command) {
407 if self != CiEnv::None {
408 // Due to use of stamp/docker, the output stream of rustbuild is not
409 // a TTY in CI, so coloring is by-default turned off.
410 // The explicit `TERM=xterm` environment is needed for
411 // `--color always` to actually work. This env var was lost when
412 // compiling through the Makefile. Very strange.
413 cmd.env("TERM", "xterm").args(&["--color", "always"]);