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|
//! 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 crate::util::t;
use crate::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"));
rm_rf(&build.out.join("bootstrap"));
for host in &build.hosts {
let entries = match build.out.join(host.triple).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).or_else(|e| {
// Work around the fact that we cannot
// delete an executable while it runs on Windows.
#[cfg(windows)]
if e.kind() == std::io::ErrorKind::PermissionDenied
&& p.file_name().and_then(std::ffi::OsStr::to_str)
== Some("bootstrap.exe")
{
eprintln!("warning: failed to delete '{}'.", p.display());
return Ok(());
}
Err(e)
})
});
return;
}
for file in t!(fs::read_dir(path)) {
rm_rf(&t!(file).path());
}
do_op(path, "remove dir", |p| {
fs::remove_dir(p).or_else(|e| {
// Check for dir not empty on Windows
// FIXME: Once `ErrorKind::DirectoryNotEmpty` is stabilized,
// match on `e.kind()` instead.
#[cfg(windows)]
if e.raw_os_error() == Some(145) {
return Ok(());
}
Err(e)
})
});
}
};
}
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 m = t!(path.symlink_metadata());
let mut p = m.permissions();
p.set_readonly(false);
t!(fs::set_permissions(path, p));
f(path).unwrap_or_else(|e| {
// Delete symlinked directories on Windows
#[cfg(windows)]
if m.file_type().is_symlink() && path.is_dir() && fs::remove_dir(path).is_ok() {
return;
}
panic!("failed to {} {}: {}", desc, path.display(), e);
});
}
Err(e) => {
panic!("failed to {} {}: {}", desc, path.display(), e);
}
}
}
|
