mirror of
https://github.com/golang/go
synced 2024-10-01 01:18:32 -06:00
2d9ba733ec
The options can be modified without the view being recreated, so we need a mutex there. Change-Id: I87e881835622a941fce98e4a1062aa41acd84fcb Reviewed-on: https://go-review.googlesource.com/c/tools/+/227022 Reviewed-by: Ian Cottrell <iancottrell@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Run-TryBot: Rebecca Stambler <rstambler@golang.org>
60 lines
1.7 KiB
Go
60 lines
1.7 KiB
Go
// Copyright 2020 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package cache
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
func init() {
|
|
checkPathCase = darwinCheckPathCase
|
|
}
|
|
|
|
func darwinCheckPathCase(path string) error {
|
|
// Darwin provides fcntl(F_GETPATH) to get a path for an arbitrary FD.
|
|
// Conveniently for our purposes, it gives the canonical case back. But
|
|
// there's no guarantee that it will follow the same route through the
|
|
// filesystem that the original path did.
|
|
|
|
path, err := filepath.Abs(path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
fd, err := syscall.Open(path, os.O_RDONLY, 0)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer syscall.Close(fd)
|
|
buf := make([]byte, 4096) // No MAXPATHLEN in syscall, I think it's 1024, this is bigger.
|
|
|
|
// Wheeee! syscall doesn't expose a way to call Fcntl except FcntlFlock.
|
|
// As of writing, it just passes the pointer through, so we can just lie.
|
|
if err := syscall.FcntlFlock(uintptr(fd), syscall.F_GETPATH, (*syscall.Flock_t)(unsafe.Pointer(&buf[0]))); err != nil {
|
|
return err
|
|
}
|
|
buf = buf[:bytes.IndexByte(buf, 0)]
|
|
|
|
isRoot := func(p string) bool {
|
|
return p[len(p)-1] == filepath.Separator
|
|
}
|
|
// Darwin seems to like having multiple names for the same folder. Match as much of the suffix as we can.
|
|
for got, want := path, string(buf); !isRoot(got) && !isRoot(want); got, want = filepath.Dir(got), filepath.Dir(want) {
|
|
g, w := filepath.Base(got), filepath.Base(want)
|
|
if !strings.EqualFold(g, w) {
|
|
break
|
|
}
|
|
if g != w {
|
|
return fmt.Errorf("case mismatch in path %q: component %q should be %q", path, g, w)
|
|
}
|
|
}
|
|
return nil
|
|
}
|