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"));
24 rm_rf(&build.out.join("bootstrap"));
26 for host in &build.hosts {
27 let entries = match build.out.join(host.triple).read_dir() {
32 for entry in entries {
33 let entry = t!(entry);
34 if entry.file_name().to_str() == Some("llvm") {
37 let path = t!(entry.path().canonicalize());
44 fn rm_rf(path: &Path) {
45 match path.symlink_metadata() {
47 if e.kind() == ErrorKind::NotFound {
50 panic!("failed to get metadata for file {}: {}", path.display(), e);
53 if metadata.file_type().is_file() || metadata.file_type().is_symlink() {
54 do_op(path, "remove file", |p| {
55 fs::remove_file(p).or_else(|e| {
56 // Work around the fact that we cannot
57 // delete an executable while it runs on Windows.
59 if e.kind() == std::io::ErrorKind::PermissionDenied
60 && p.file_name().and_then(std::ffi::OsStr::to_str)
61 == Some("bootstrap.exe")
63 eprintln!("warning: failed to delete '{}'.", p.display());
72 for file in t!(fs::read_dir(path)) {
73 rm_rf(&t!(file).path());
75 do_op(path, "remove dir", |p| {
76 fs::remove_dir(p).or_else(|e| {
77 // Check for dir not empty on Windows
79 if matches!(e.kind(), std::io::ErrorKind::Other)
80 && e.raw_os_error() == Some(145)
92 fn do_op<F>(path: &Path, desc: &str, mut f: F)
94 F: FnMut(&Path) -> io::Result<()>,
98 // On windows we can't remove a readonly file, and git will often clone files as readonly.
99 // As a result, we have some special logic to remove readonly files on windows.
100 // This is also the reason that we can't use things like fs::remove_dir_all().
101 Err(ref e) if cfg!(windows) && e.kind() == ErrorKind::PermissionDenied => {
102 let mut p = t!(path.symlink_metadata()).permissions();
103 p.set_readonly(false);
104 t!(fs::set_permissions(path, p));
105 f(path).unwrap_or_else(|e| {
106 // Deleting symlinked directories on Windows is non-trivial.
107 // Skip doing so for now.
109 if e.kind() == ErrorKind::PermissionDenied && path.is_dir() {
110 eprintln!("warning: failed to delete '{}'.", path.display());
113 panic!("failed to {} {}: {}", desc, path.display(), e);
117 panic!("failed to {} {}: {}", desc, path.display(), e);