forked from mirror/afero
138 lines
3.3 KiB
Go
138 lines
3.3 KiB
Go
// Copyright © 2021 Vasily Ovchinnikov <vasily@remerge.io>.
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//
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// The code in this file is derived from afero fork github.com/Zatte/afero by Mikael Rapp
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// licensed under Apache License 2.0.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package gcsfs
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import (
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"os"
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"path/filepath"
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"strings"
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"time"
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"cloud.google.com/go/storage"
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)
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const (
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folderSize = 42
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)
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type FileInfo struct {
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name string
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size int64
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updated time.Time
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isDir bool
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fileMode os.FileMode
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}
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func newFileInfo(name string, fs *GcsFs, fileMode os.FileMode) (*FileInfo, error) {
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res := &FileInfo{
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name: name,
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size: folderSize,
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updated: time.Time{},
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isDir: false,
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fileMode: fileMode,
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}
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obj := fs.getObj(name)
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objAttrs, err := obj.Attrs(fs.ctx)
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if err != nil {
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if err.Error() == ErrEmptyObjectName.Error() {
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// It's a root folder here, we return right away
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res.name = fs.ensureTrailingSeparator(res.name)
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res.isDir = true
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return res, nil
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} else if err.Error() == ErrObjectDoesNotExist.Error() {
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// Folders do not actually "exist" in GCloud, so we have to check, if something exists with
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// such a prefix
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it := fs.bucket.Objects(
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fs.ctx, &storage.Query{Delimiter: fs.separator, Prefix: name, Versions: false})
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if _, err = it.Next(); err == nil {
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res.name = fs.ensureTrailingSeparator(res.name)
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res.isDir = true
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return res, nil
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}
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return nil, ErrFileNotFound
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}
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return nil, err
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}
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res.size = objAttrs.Size
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res.updated = objAttrs.Updated
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return res, nil
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}
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func newFileInfoFromAttrs(objAttrs *storage.ObjectAttrs, fileMode os.FileMode) *FileInfo {
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res := &FileInfo{
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name: objAttrs.Name,
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size: objAttrs.Size,
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updated: objAttrs.Updated,
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isDir: false,
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fileMode: fileMode,
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}
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if res.name == "" {
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if objAttrs.Prefix != "" {
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// It's a virtual folder! It does not have a name, but prefix - this is how GCS API
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// deals with them at the moment
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res.name = objAttrs.Prefix
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res.size = folderSize
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res.isDir = true
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}
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}
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return res
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}
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func (fi *FileInfo) Name() string {
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return filepath.Base(fi.name)
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}
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func (fi *FileInfo) Size() int64 {
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return fi.size
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}
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func (fi *FileInfo) Mode() os.FileMode {
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if fi.IsDir() {
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return os.ModeDir | fi.fileMode
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}
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return fi.fileMode
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}
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func (fi *FileInfo) ModTime() time.Time {
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return fi.updated
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}
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func (fi *FileInfo) IsDir() bool {
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return fi.isDir
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}
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func (fi *FileInfo) Sys() interface{} {
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return nil
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}
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type ByName []*FileInfo
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func (a ByName) Len() int { return len(a) }
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func (a ByName) Swap(i, j int) {
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a[i].name, a[j].name = a[j].name, a[i].name
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a[i].size, a[j].size = a[j].size, a[i].size
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a[i].updated, a[j].updated = a[j].updated, a[i].updated
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a[i].isDir, a[j].isDir = a[j].isDir, a[i].isDir
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}
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func (a ByName) Less(i, j int) bool { return strings.Compare(a[i].Name(), a[j].Name()) == -1 }
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