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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Implementation of `make clean` in rustbuild.
//!
//! Responsible for cleaning out a build directory of all old and stale
//! artifacts to prepare for a fresh build. Currently doesn't remove the
//! `build/cache` directory (download cache) or the `build/$target/llvm`
//! directory unless the --all flag is present.
use std::fs;
use std::io::{self, ErrorKind};
use std::path::Path;
use Build;
pub fn clean(build: &Build, all: bool) {
rm_rf("tmp".as_ref());
if all {
rm_rf(&build.out);
} else {
rm_rf(&build.out.join("tmp"));
rm_rf(&build.out.join("dist"));
for host in &build.hosts {
let entries = match build.out.join(host).read_dir() {
Ok(iter) => iter,
Err(_) => continue,
};
for entry in entries {
let entry = t!(entry);
if entry.file_name().to_str() == Some("llvm") {
continue
}
let path = t!(entry.path().canonicalize());
rm_rf(&path);
}
}
}
}
fn rm_rf(path: &Path) {
match path.symlink_metadata() {
Err(e) => {
if e.kind() == ErrorKind::NotFound {
return;
}
panic!("failed to get metadata for file {}: {}", path.display(), e);
},
Ok(metadata) => {
if metadata.file_type().is_file() || metadata.file_type().is_symlink() {
do_op(path, "remove file", |p| fs::remove_file(p));
return;
}
for file in t!(fs::read_dir(path)) {
rm_rf(&t!(file).path());
}
do_op(path, "remove dir", |p| fs::remove_dir(p));
},
};
}
fn do_op<F>(path: &Path, desc: &str, mut f: F)
where F: FnMut(&Path) -> io::Result<()>
{
match f(path) {
Ok(()) => {}
// On windows we can't remove a readonly file, and git will often clone files as readonly.
// As a result, we have some special logic to remove readonly files on windows.
// This is also the reason that we can't use things like fs::remove_dir_all().
Err(ref e) if cfg!(windows) &&
e.kind() == ErrorKind::PermissionDenied => {
let mut p = t!(path.symlink_metadata()).permissions();
p.set_readonly(false);
t!(fs::set_permissions(path, p));
f(path).unwrap_or_else(|e| {
panic!("failed to {} {}: {}", desc, path.display(), e);
})
}
Err(e) => {
panic!("failed to {} {}: {}", desc, path.display(), e);
}
}
}
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