github.com/bpfs/defs@v0.0.15/afero/gcsfs/gcs.go (about)

     1  // Copyright © 2021 Vasily Ovchinnikov <vasily@remerge.io>.
     2  //
     3  // The code in this file is derived from afero fork github.com/Zatte/afero by Mikael Rapp
     4  // licensed under Apache License 2.0.
     5  //
     6  // Licensed under the Apache License, Version 2.0 (the "License");
     7  // you may not use this file except in compliance with the License.
     8  // You may obtain a copy of the License at
     9  // http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing, software
    12  // distributed under the License is distributed on an "AS IS" BASIS,
    13  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  // See the License for the specific language governing permissions and
    15  // limitations under the License.
    16  
    17  package gcsfs
    18  
    19  import (
    20  	"context"
    21  	"os"
    22  	"time"
    23  
    24  	"cloud.google.com/go/storage"
    25  	"github.com/bpfs/defs/afero"
    26  	"github.com/googleapis/google-cloud-go-testing/storage/stiface"
    27  
    28  	"google.golang.org/api/option"
    29  )
    30  
    31  type GcsFs struct {
    32  	source *Fs
    33  }
    34  
    35  // NewGcsFS creates a GCS file system, automatically instantiating and decorating the storage client.
    36  // You can provide additional options to be passed to the client creation, as per
    37  // cloud.google.com/go/storage documentation
    38  func NewGcsFS(ctx context.Context, opts ...option.ClientOption) (afero.Fs, error) {
    39  	if json := os.Getenv("GOOGLE_APPLICATION_CREDENTIALS_JSON"); json != "" {
    40  		opts = append(opts, option.WithCredentialsJSON([]byte(json)))
    41  	}
    42  	client, err := storage.NewClient(ctx, opts...)
    43  	if err != nil {
    44  		return nil, err
    45  	}
    46  
    47  	return NewGcsFSFromClient(ctx, client)
    48  }
    49  
    50  // NewGcsFSWithSeparator is the same as NewGcsFS, but the files system will use the provided folder separator.
    51  func NewGcsFSWithSeparator(ctx context.Context, folderSeparator string, opts ...option.ClientOption) (afero.Fs, error) {
    52  	client, err := storage.NewClient(ctx, opts...)
    53  	if err != nil {
    54  		return nil, err
    55  	}
    56  
    57  	return NewGcsFSFromClientWithSeparator(ctx, client, folderSeparator)
    58  }
    59  
    60  // NewGcsFSFromClient creates a GCS file system from a given storage client
    61  func NewGcsFSFromClient(ctx context.Context, client *storage.Client) (afero.Fs, error) {
    62  	c := stiface.AdaptClient(client)
    63  
    64  	return &GcsFs{NewGcsFs(ctx, c)}, nil
    65  }
    66  
    67  // NewGcsFSFromClientWithSeparator is the same as NewGcsFSFromClient, but the file system will use the provided folder separator.
    68  func NewGcsFSFromClientWithSeparator(ctx context.Context, client *storage.Client, folderSeparator string) (afero.Fs, error) {
    69  	c := stiface.AdaptClient(client)
    70  
    71  	return &GcsFs{NewGcsFsWithSeparator(ctx, c, folderSeparator)}, nil
    72  }
    73  
    74  // Wraps gcs.GcsFs and convert some return types to afero interfaces.
    75  
    76  func (fs *GcsFs) Name() string {
    77  	return fs.source.Name()
    78  }
    79  
    80  func (fs *GcsFs) Create(name string) (afero.File, error) {
    81  	return fs.source.Create(name)
    82  }
    83  
    84  func (fs *GcsFs) Mkdir(name string, perm os.FileMode) error {
    85  	return fs.source.Mkdir(name, perm)
    86  }
    87  
    88  func (fs *GcsFs) MkdirAll(path string, perm os.FileMode) error {
    89  	return fs.source.MkdirAll(path, perm)
    90  }
    91  
    92  func (fs *GcsFs) Open(name string) (afero.File, error) {
    93  	return fs.source.Open(name)
    94  }
    95  
    96  func (fs *GcsFs) OpenFile(name string, flag int, perm os.FileMode) (afero.File, error) {
    97  	return fs.source.OpenFile(name, flag, perm)
    98  }
    99  
   100  func (fs *GcsFs) Remove(name string) error {
   101  	return fs.source.Remove(name)
   102  }
   103  
   104  func (fs *GcsFs) RemoveAll(path string) error {
   105  	return fs.source.RemoveAll(path)
   106  }
   107  
   108  func (fs *GcsFs) Rename(oldname, newname string) error {
   109  	return fs.source.Rename(oldname, newname)
   110  }
   111  
   112  func (fs *GcsFs) Stat(name string) (os.FileInfo, error) {
   113  	return fs.source.Stat(name)
   114  }
   115  
   116  func (fs *GcsFs) Chmod(name string, mode os.FileMode) error {
   117  	return fs.source.Chmod(name, mode)
   118  }
   119  
   120  func (fs *GcsFs) Chtimes(name string, atime time.Time, mtime time.Time) error {
   121  	return fs.source.Chtimes(name, atime, mtime)
   122  }
   123  
   124  func (fs *GcsFs) Chown(name string, uid, gid int) error {
   125  	return fs.source.Chown(name, uid, gid)
   126  }