2627ae32f2
The compiler already has special support for fixing up verbatim paths with disks on Windows to something that can be correctly passed down to gcc, and this commit adds support for verbatim UNC paths as well. Closes #25505
56 lines
2.2 KiB
Rust
56 lines
2.2 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use std::path::{self, Path, PathBuf};
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use std::ffi::OsString;
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// Unfortunately, on windows, it looks like msvcrt.dll is silently translating
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// verbatim paths under the hood to non-verbatim paths! This manifests itself as
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// gcc looking like it cannot accept paths of the form `\\?\C:\...`, but the
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// real bug seems to lie in msvcrt.dll.
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//
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// Verbatim paths are generally pretty rare, but the implementation of
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// `fs::canonicalize` currently generates paths of this form, meaning that we're
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// going to be passing quite a few of these down to gcc, so we need to deal with
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// this case.
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//
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// For now we just strip the "verbatim prefix" of `\\?\` from the path. This
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// will probably lose information in some cases, but there's not a whole lot
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// more we can do with a buggy msvcrt...
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//
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// For some more information, see this comment:
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// https://github.com/rust-lang/rust/issues/25505#issuecomment-102876737
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pub fn fix_windows_verbatim_for_gcc(p: &Path) -> PathBuf {
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if !cfg!(windows) {
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return p.to_path_buf()
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}
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let mut components = p.components();
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let prefix = match components.next() {
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Some(path::Component::Prefix(p)) => p,
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_ => return p.to_path_buf(),
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};
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match prefix.kind() {
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path::Prefix::VerbatimDisk(disk) => {
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let mut base = OsString::from(format!("{}:", disk as char));
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base.push(components.as_path());
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PathBuf::from(base)
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}
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path::Prefix::VerbatimUNC(server, share) => {
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let mut base = OsString::from(r"\\");
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base.push(server);
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base.push(r"\");
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base.push(share);
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base.push(components.as_path());
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PathBuf::from(base)
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}
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_ => p.to_path_buf(),
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}
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}
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