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lib/fs: Case insensitive conversion to rel path on windows (fixes #5183) (#5176)

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This commit is contained in:
Simon Frei 2018-09-11 22:30:32 +02:00 committed by Jakob Borg
parent 60a6a40175
commit 50ba0fd079
7 changed files with 121 additions and 26 deletions
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4
lib/fs/basicfs.go
View File

@ -90,10 +90,6 @@ func (f *BasicFilesystem) unrooted(path string) string {
return rel(path, f.root)
}
func rel(path, prefix string) string {
return strings.TrimPrefix(strings.TrimPrefix(path, prefix), string(PathSeparator))
}
func (f *BasicFilesystem) Chmod(name string, mode FileMode) error {
name, err := f.rooted(name)
if err != nil {

26
lib/fs/basicfs_test.go
View File

@ -490,3 +490,29 @@ func TestNewBasicFilesystem(t *testing.T) {
t.Errorf(`newBasicFilesystem("relative/path").root == %q, expected absolutification`, fs.root)
}
}
func TestRel(t *testing.T) {
testCases := []struct {
root string
abs string
expectedRel string
}{
{"/", "/", ""},
{"/", "/test", "test"},
{"/", "/Test", "Test"},
{"/Test", "/Test/test", "test"},
}
if runtime.GOOS == "windows" {
for i := range testCases {
testCases[i].root = filepath.FromSlash(testCases[i].root)
testCases[i].abs = filepath.FromSlash(testCases[i].abs)
testCases[i].expectedRel = filepath.FromSlash(testCases[i].expectedRel)
}
}
for _, tc := range testCases {
if res := rel(tc.abs, tc.root); res != tc.expectedRel {
t.Errorf(`rel("%v", "%v") == "%v", expected "%v"`, tc.abs, tc.root, res, tc.expectedRel)
}
}
}

24
lib/fs/basicfs_unix.go
View File

@ -8,7 +8,11 @@
package fs
import "os"
import (
"fmt"
"os"
"strings"
)
func (BasicFilesystem) SymlinksSupported() bool {
return true
@ -52,6 +56,20 @@ func (f *BasicFilesystem) Roots() ([]string, error) {
return []string{"/"}, nil
}
func (f *BasicFilesystem) resolveWin83(absPath string) string {
return absPath
// unrootedChecked returns the path relative to the folder root (same as
// unrooted). It panics if the given path is not a subpath and handles the
// special case when the given path is the folder root without a trailing
// pathseparator.
func (f *BasicFilesystem) unrootedChecked(absPath, root string) string {
if absPath+string(PathSeparator) == root {
return "."
}
if !strings.HasPrefix(absPath, root) {
panic(fmt.Sprintf("bug: Notify backend is processing a change outside of the filesystem root: f.root==%v, root==%v, path==%v", f.root, root, absPath))
}
return rel(absPath, root)
}
func rel(path, prefix string) string {
return strings.TrimPrefix(strings.TrimPrefix(path, prefix), string(PathSeparator))
}

17
lib/fs/basicfs_watch.go
View File

@ -11,10 +11,8 @@ package fs
import (
"context"
"errors"
"fmt"
"path/filepath"
"runtime"
"strings"
"github.com/syncthing/notify"
)
@ -114,18 +112,3 @@ func (f *BasicFilesystem) eventType(notifyType notify.Event) EventType {
}
return NonRemove
}
// unrootedChecked returns the path relative to the folder root (same as
// unrooted). It panics if the given path is not a subpath and handles the
// special case when the given path is the folder root without a trailing
// pathseparator.
func (f *BasicFilesystem) unrootedChecked(absPath, root string) string {
absPath = f.resolveWin83(absPath)
if absPath+string(PathSeparator) == root {
return "."
}
if !strings.HasPrefix(absPath, root) {
panic(fmt.Sprintf("bug: Notify backend is processing a change outside of the filesystem root: f.root==%v, root==%v, path==%v", f.root, root, absPath))
}
return rel(absPath, root)
}

6
lib/fs/basicfs_watch_test.go
View File

@ -320,8 +320,12 @@ func TestWatchIssue4877(t *testing.T) {
{name, NonRemove},
}
volName := filepath.VolumeName(testDirAbs)
if volName == "" {
t.Fatalf("Failed to get volume name for path %v", testDirAbs)
}
origTestFs := testFs
testFs = NewFilesystem(FilesystemTypeBasic, strings.ToLower(testDirAbs[:1])+strings.ToUpper(testDirAbs[1:]))
testFs = NewFilesystem(FilesystemTypeBasic, strings.ToLower(volName)+strings.ToUpper(testDirAbs[len(volName):]))
defer func() {
testFs = origTestFs
}()

25
lib/fs/basicfs_windows.go
View File

@ -152,6 +152,28 @@ func (f *BasicFilesystem) Roots() ([]string, error) {
return drives, nil
}
// unrootedChecked returns the path relative to the folder root (same as
// unrooted). It panics if the given path is not a subpath and handles the
// special case when the given path is the folder root without a trailing
// pathseparator.
func (f *BasicFilesystem) unrootedChecked(absPath, root string) string {
absPath = f.resolveWin83(absPath)
lowerAbsPath := UnicodeLowercase(absPath)
lowerRoot := UnicodeLowercase(root)
if lowerAbsPath+string(PathSeparator) == lowerRoot {
return "."
}
if !strings.HasPrefix(lowerAbsPath, lowerRoot) {
panic(fmt.Sprintf("bug: Notify backend is processing a change outside of the filesystem root: f.root==%v, root==%v (lower), path==%v (lower)", f.root, lowerRoot, lowerAbsPath))
}
return rel(absPath, root)
}
func rel(path, prefix string) string {
lowerRel := strings.TrimPrefix(strings.TrimPrefix(UnicodeLowercase(path), UnicodeLowercase(prefix)), string(PathSeparator))
return path[len(path)-len(lowerRel):]
}
func (f *BasicFilesystem) resolveWin83(absPath string) string {
if !isMaybeWin83(absPath) {
return absPath
@ -170,7 +192,8 @@ func (f *BasicFilesystem) resolveWin83(absPath string) string {
}
// Failed getting the long path. Return the part of the path which is
// already a long path.
for absPath = filepath.Dir(absPath); strings.HasPrefix(absPath, f.root); absPath = filepath.Dir(absPath) {
lowerRoot := UnicodeLowercase(f.root)
for absPath = filepath.Dir(absPath); strings.HasPrefix(UnicodeLowercase(absPath), lowerRoot); absPath = filepath.Dir(absPath) {
if !isMaybeWin83(absPath) {
return absPath
}

45
lib/fs/basicfs_windows_test.go
View File

@ -90,3 +90,48 @@ func TestIsWindows83(t *testing.T) {
}
}
}
func TestRelUnrootedCheckedWindows(t *testing.T) {
testCases := []struct {
root string
abs string
expectedRel string
}{
{`c:\`, `c:\foo`, `foo`},
{`C:\`, `c:\foo`, `foo`},
{`C:\`, `C:\foo`, `foo`},
{`c:\`, `C:\foo`, `foo`},
{`\\?c:\`, `\\?c:\foo`, `foo`},
{`\\?C:\`, `\\?c:\foo`, `foo`},
{`\\?C:\`, `\\?C:\foo`, `foo`},
{`\\?c:\`, `\\?C:\foo`, `foo`},
{`c:\foo`, `c:\foo\bar`, `bar`},
{`c:\foo`, `c:\foo\bAr`, `bAr`},
{`c:\foO`, `c:\Foo\bar`, `bar`},
{`c:\foO`, `c:\fOo\bAr`, `bAr`},
{`c:\foO`, `c:\fOo`, ``},
{`C:\foO`, `c:\fOo`, ``},
}
for _, tc := range testCases {
if res := rel(tc.abs, tc.root); res != tc.expectedRel {
t.Errorf(`rel("%v", "%v") == "%v", expected "%v"`, tc.abs, tc.root, res, tc.expectedRel)
}
// unrootedChecked really just wraps rel, and does not care about
// the actual root of that filesystem, but should not panic on these
// test cases.
fs := BasicFilesystem{root: tc.root}
if res := fs.unrootedChecked(tc.abs, tc.root); res != tc.expectedRel {
t.Errorf(`unrootedChecked("%v", "%v") == "%v", expected "%v"`, tc.abs, tc.root, res, tc.expectedRel)
}
fs = BasicFilesystem{root: strings.ToLower(tc.root)}
if res := fs.unrootedChecked(tc.abs, tc.root); res != tc.expectedRel {
t.Errorf(`unrootedChecked("%v", "%v") == "%v", expected "%v"`, tc.abs, tc.root, res, tc.expectedRel)
}
fs = BasicFilesystem{root: strings.ToUpper(tc.root)}
if res := fs.unrootedChecked(tc.abs, tc.root); res != tc.expectedRel {
t.Errorf(`unrootedChecked("%v", "%v") == "%v", expected "%v"`, tc.abs, tc.root, res, tc.expectedRel)
}
}
}