forked from TrueCloudLab/rclone
51 lines
1.8 KiB
Go
51 lines
1.8 KiB
Go
|
package cacheroot
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"os"
|
||
|
|
"path/filepath"
|
||
|
|
"runtime"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"github.com/pkg/errors"
|
||
|
|
"github.com/rclone/rclone/lib/encoder"
|
||
|
|
"github.com/rclone/rclone/lib/file"
|
||
|
|
)
|
||
|
|
|
||
|
|
// CreateCacheRoot will derive and make a subsystem cache path.
|
||
|
|
//
|
||
|
|
// Returned root OS path is an absolute path with UNC prefix,
|
||
|
|
// OS-specific path separators, and encoded with OS-specific encoder.
|
||
|
|
//
|
||
|
|
// Additionally it is returned as a standard path without UNC prefix,
|
||
|
|
// with slash path separators, and standard (internal) encoding.
|
||
|
|
//
|
||
|
|
// Care is taken when creating OS paths so that the ':' separator
|
||
|
|
// following a drive letter is not encoded, e.g. into unicode fullwidth colon.
|
||
|
|
//
|
||
|
|
// parentOSPath should contain an absolute local path in OS encoding.
|
||
|
|
//
|
||
|
|
// Note: instead of fs.Fs it takes name and root as plain strings
|
||
|
|
// to prevent import loops due to dependency on the fs package.
|
||
|
|
func CreateCacheRoot(parentOSPath, fsName, fsRoot, cacheName string) (rootOSPath, standardPath string, err error) {
|
||
|
|
// Get a relative cache path representing the remote.
|
||
|
|
relativeDir := fsRoot
|
||
|
|
if runtime.GOOS == "windows" && strings.HasPrefix(relativeDir, `//?/`) {
|
||
|
|
// Trim off the leading "//" to make the result
|
||
|
|
// valid for appending to another path.
|
||
|
|
relativeDir = relativeDir[2:]
|
||
|
|
}
|
||
|
|
relativeDir = fsName + "/" + relativeDir
|
||
|
|
|
||
|
|
// Derive and make the cache root directory
|
||
|
|
relativeOSPath := filepath.FromSlash(encoder.OS.FromStandardPath(relativeDir))
|
||
|
|
rootOSPath = file.UNCPath(filepath.Join(parentOSPath, cacheName, relativeOSPath))
|
||
|
|
if err = os.MkdirAll(rootOSPath, 0700); err != nil {
|
||
|
|
return "", "", errors.Wrapf(err, "failed to create %s cache directory", cacheName)
|
||
|
|
}
|
||
|
|
|
||
|
|
parentStdPath := encoder.OS.ToStandardPath(filepath.ToSlash(parentOSPath))
|
||
|
|
standardPath = fmt.Sprintf("%s/%s/%s", parentStdPath, cacheName, relativeDir)
|
||
|
|
return rootOSPath, standardPath, nil
|
||
|
|
}
|