1 //! Implementation of `make clean` in rustbuild.
3 //! Responsible for cleaning out a build directory of all old and stale
4 //! artifacts to prepare for a fresh build. Currently doesn't remove the
5 //! `build/cache` directory (download cache) or the `build/$target/llvm`
6 //! directory unless the `--all` flag is present.
9 use std::io::{self, ErrorKind};
14 pub fn clean(build: &Build, all: bool) {
15 rm_rf("tmp".as_ref());
20 rm_rf(&build.out.join("tmp"));
21 rm_rf(&build.out.join("dist"));
23 for host in &build.hosts {
24 let entries = match build.out.join(host).read_dir() {
29 for entry in entries {
30 let entry = t!(entry);
31 if entry.file_name().to_str() == Some("llvm") {
34 let path = t!(entry.path().canonicalize());
41 fn rm_rf(path: &Path) {
42 match path.symlink_metadata() {
44 if e.kind() == ErrorKind::NotFound {
47 panic!("failed to get metadata for file {}: {}", path.display(), e);
50 if metadata.file_type().is_file() || metadata.file_type().is_symlink() {
51 do_op(path, "remove file", |p| fs::remove_file(p));
55 for file in t!(fs::read_dir(path)) {
56 rm_rf(&t!(file).path());
58 do_op(path, "remove dir", |p| fs::remove_dir(p));
63 fn do_op<F>(path: &Path, desc: &str, mut f: F)
64 where F: FnMut(&Path) -> io::Result<()>
68 // On windows we can't remove a readonly file, and git will often clone files as readonly.
69 // As a result, we have some special logic to remove readonly files on windows.
70 // This is also the reason that we can't use things like fs::remove_dir_all().
71 Err(ref e) if cfg!(windows) &&
72 e.kind() == ErrorKind::PermissionDenied => {
73 let mut p = t!(path.symlink_metadata()).permissions();
74 p.set_readonly(false);
75 t!(fs::set_permissions(path, p));
76 f(path).unwrap_or_else(|e| {
77 panic!("failed to {} {}: {}", desc, path.display(), e);
81 panic!("failed to {} {}: {}", desc, path.display(), e);