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os: use filepathlite.IsAbs

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It is better to have a single implementation of IsAbs, which is quite
tricky to get right on Windows.

Change-Id: I45933b0ceff2920d9eddb61e62aacb2602c3dc8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/582498
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This commit is contained in:
qmuntal 2024-04-30 14:35:18 +02:00 committed by Damien Neil
parent 150f45b2c4
commit d95fa7aca7
3 changed files with 6 additions and 15 deletions
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3
src/os/file_windows.go
View File

@ -6,6 +6,7 @@ package os
import (
"errors"
"internal/filepathlite"
"internal/godebug"
"internal/poll"
"internal/syscall/windows"
@ -313,7 +314,7 @@ func Symlink(oldname, newname string) error {
return &LinkError{"symlink", oldname, newname, err}
}
var o *uint16
if isAbs(oldname) {
if filepathlite.IsAbs(oldname) {
o, err = syscall.UTF16PtrFromString(fixLongPath(oldname))
} else {
// Do not use fixLongPath on oldname for relative symlinks,

15
src/os/path_windows.go
View File

@ -5,6 +5,7 @@
package os
import (
"internal/filepathlite"
"internal/syscall/windows"
"syscall"
)
@ -44,18 +45,6 @@ func basename(name string) string {
return name
}
func isAbs(path string) (b bool) {
v := volumeName(path)
if v == "" {
return false
}
path = path[len(v):]
if path == "" {
return false
}
return IsPathSeparator(path[0])
}
func volumeName(path string) (v string) {
if len(path) < 2 {
return ""
@ -174,7 +163,7 @@ func addExtendedPrefix(path string) string {
// The MSDN docs appear to say that a normal path that is 248 bytes long
// will work; empirically the path must be less then 248 bytes long.
pathLength := len(path)
if !isAbs(path) {
if !filepathlite.IsAbs(path) {
// If the path is relative, we need to prepend the working directory
// plus a separator to the path before we can determine if it's too long.
// We don't want to call syscall.Getwd here, as that call is expensive to do

3
src/os/types_windows.go
View File

@ -5,6 +5,7 @@
package os
import (
"internal/filepathlite"
"internal/godebug"
"internal/syscall/windows"
"sync"
@ -338,7 +339,7 @@ func (fs *fileStat) loadFileId() error {
// and set name from path.
func (fs *fileStat) saveInfoFromPath(path string) error {
fs.path = path
if !isAbs(fs.path) {
if !filepathlite.IsAbs(fs.path) {
var err error
fs.path, err = syscall.FullPath(fs.path)
if err != nil {