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};
16 pub fn clean(build: &Build, all: bool) {
17 rm_rf("tmp".as_ref());
22 rm_rf(&build.out.join("tmp"));
23 rm_rf(&build.out.join("dist"));
25 for host in &build.hosts {
26 let entries = match build.out.join(host.triple).read_dir() {
31 for entry in entries {
32 let entry = t!(entry);
33 if entry.file_name().to_str() == Some("llvm") {
36 let path = t!(entry.path().canonicalize());
43 fn rm_rf(path: &Path) {
44 match path.symlink_metadata() {
46 if e.kind() == ErrorKind::NotFound {
49 panic!("failed to get metadata for file {}: {}", path.display(), e);
52 if metadata.file_type().is_file() || metadata.file_type().is_symlink() {
53 do_op(path, "remove file", |p| fs::remove_file(p));
57 for file in t!(fs::read_dir(path)) {
58 rm_rf(&t!(file).path());
60 do_op(path, "remove dir", |p| fs::remove_dir(p));
65 fn do_op<F>(path: &Path, desc: &str, mut f: F)
67 F: FnMut(&Path) -> io::Result<()>,
71 // On windows we can't remove a readonly file, and git will often clone files as readonly.
72 // As a result, we have some special logic to remove readonly files on windows.
73 // This is also the reason that we can't use things like fs::remove_dir_all().
74 Err(ref e) if cfg!(windows) && e.kind() == ErrorKind::PermissionDenied => {
75 let mut p = t!(path.symlink_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);