1 // Copyright 2016 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 `make clean` in rustbuild.
13 //! Responsible for cleaning out a build directory of all old and stale
14 //! artifacts to prepare for a fresh build. Currently doesn't remove the
15 //! `build/cache` directory (download cache) or the `build/$target/llvm`
16 //! directory as we want that cached between builds.
19 use std::io::{self, ErrorKind};
24 pub fn clean(build: &Build) {
25 rm_rf(build, "tmp".as_ref());
26 rm_rf(build, &build.out.join("tmp"));
28 for host in build.config.host.iter() {
29 let entries = match build.out.join(host).read_dir() {
34 for entry in entries {
35 let entry = t!(entry);
36 if entry.file_name().to_str() == Some("llvm") {
39 let path = t!(entry.path().canonicalize());
45 fn rm_rf(build: &Build, path: &Path) {
50 return do_op(path, "remove file", |p| fs::remove_file(p));
53 for file in t!(fs::read_dir(path)) {
54 let file = t!(file).path();
59 // On windows we can't remove a readonly file, and git will
60 // often clone files as readonly. As a result, we have some
61 // special logic to remove readonly files on windows.
62 do_op(&file, "remove file", |p| fs::remove_file(p));
65 do_op(path, "remove dir", |p| fs::remove_dir(p));
68 fn do_op<F>(path: &Path, desc: &str, mut f: F)
69 where F: FnMut(&Path) -> io::Result<()>
73 Err(ref e) if cfg!(windows) &&
74 e.kind() == ErrorKind::PermissionDenied => {
75 let mut p = t!(path.metadata()).permissions();
76 p.set_readonly(false);
77 t!(fs::set_permissions(path, p));
78 f(path).unwrap_or_else(|e| {
79 panic!("failed to {} {}: {}", desc, path.display(), e);
83 panic!("failed to {} {}: {}", desc, path.display(), e);