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"));
27 rm_rf(build, &build.out.join("dist"));
29 for host in build.config.host.iter() {
30 let entries = match build.out.join(host).read_dir() {
35 for entry in entries {
36 let entry = t!(entry);
37 if entry.file_name().to_str() == Some("llvm") {
40 let path = t!(entry.path().canonicalize());
46 fn rm_rf(build: &Build, path: &Path) {
51 return do_op(path, "remove file", |p| fs::remove_file(p));
54 for file in t!(fs::read_dir(path)) {
55 let file = t!(file).path();
60 // On windows we can't remove a readonly file, and git will
61 // often clone files as readonly. As a result, we have some
62 // special logic to remove readonly files on windows.
63 do_op(&file, "remove file", |p| fs::remove_file(p));
66 do_op(path, "remove dir", |p| fs::remove_dir(p));
69 fn do_op<F>(path: &Path, desc: &str, mut f: F)
70 where F: FnMut(&Path) -> io::Result<()>
74 Err(ref e) if cfg!(windows) &&
75 e.kind() == ErrorKind::PermissionDenied => {
76 let mut p = t!(path.metadata()).permissions();
77 p.set_readonly(false);
78 t!(fs::set_permissions(path, p));
79 f(path).unwrap_or_else(|e| {
80 panic!("failed to {} {}: {}", desc, path.display(), e);
84 panic!("failed to {} {}: {}", desc, path.display(), e);