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authorNiall Sheridan <nsheridan@gmail.com>2019-07-07 21:33:44 +0100
committerNiall Sheridan <nsheridan@gmail.com>2019-07-07 21:33:44 +0100
commit8c12c6939aab9106db14ec2d11d983bc5b29fb2c (patch)
treef9dc8a7d167c6355e47a65c52d4eb7b9ea03e6c8 /vendor/go4.org/wkfs/gcs
parent0bd454cc448b812da6c693b451d86ff4cadbb6b2 (diff)
Switch to modules
Diffstat (limited to 'vendor/go4.org/wkfs/gcs')
-rw-r--r--vendor/go4.org/wkfs/gcs/gcs.go199
1 files changed, 0 insertions, 199 deletions
diff --git a/vendor/go4.org/wkfs/gcs/gcs.go b/vendor/go4.org/wkfs/gcs/gcs.go
deleted file mode 100644
index 7d29e56..0000000
--- a/vendor/go4.org/wkfs/gcs/gcs.go
+++ /dev/null
@@ -1,199 +0,0 @@
-/*
-Copyright 2014 The Perkeep Authors
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-// Package gcs registers a Google Cloud Storage filesystem at the
-// well-known /gcs/ filesystem path if the current machine is running
-// on Google Compute Engine.
-//
-// It was initially only meant for small files, and as such, it can only
-// read files smaller than 1MB for now.
-package gcs // import "go4.org/wkfs/gcs"
-
-import (
- "bytes"
- "fmt"
- "io"
- "io/ioutil"
- "os"
- "path"
- "strings"
- "time"
-
- "cloud.google.com/go/compute/metadata"
- "cloud.google.com/go/storage"
- "go4.org/wkfs"
- "golang.org/x/net/context"
- "golang.org/x/oauth2"
- "golang.org/x/oauth2/google"
- "google.golang.org/api/option"
-)
-
-// Max size for all files read, because we use a bytes.Reader as our file
-// reader, instead of storage.NewReader. This is because we get all wkfs.File
-// methods for free by embedding a bytes.Reader. This filesystem was only supposed
-// to be for configuration data only, so this is ok for now.
-const maxSize = 1 << 20
-
-func init() {
- if !metadata.OnGCE() {
- return
- }
- hc, err := google.DefaultClient(oauth2.NoContext)
- if err != nil {
- registerBrokenFS(fmt.Errorf("could not get http client for context: %v", err))
- return
- }
- ctx := context.Background()
- sc, err := storage.NewClient(ctx, option.WithHTTPClient(hc))
- if err != nil {
- registerBrokenFS(fmt.Errorf("could not get cloud storage client: %v", err))
- return
- }
- wkfs.RegisterFS("/gcs/", &gcsFS{
- ctx: ctx,
- sc: sc,
- })
-}
-
-type gcsFS struct {
- ctx context.Context
- sc *storage.Client
- err error // sticky error
-}
-
-func registerBrokenFS(err error) {
- wkfs.RegisterFS("/gcs/", &gcsFS{
- err: err,
- })
-}
-
-func (fs *gcsFS) parseName(name string) (bucket, fileName string, err error) {
- if fs.err != nil {
- return "", "", fs.err
- }
- name = strings.TrimPrefix(name, "/gcs/")
- i := strings.Index(name, "/")
- if i < 0 {
- return name, "", nil
- }
- return name[:i], name[i+1:], nil
-}
-
-// Open opens the named file for reading. It returns an error if the file size
-// is larger than 1 << 20.
-func (fs *gcsFS) Open(name string) (wkfs.File, error) {
- bucket, fileName, err := fs.parseName(name)
- if err != nil {
- return nil, err
- }
- obj := fs.sc.Bucket(bucket).Object(fileName)
- attrs, err := obj.Attrs(fs.ctx)
- if err != nil {
- return nil, err
- }
- size := attrs.Size
- if size > maxSize {
- return nil, fmt.Errorf("file %s too large (%d bytes) for /gcs/ filesystem", name, size)
- }
- rc, err := obj.NewReader(fs.ctx)
- if err != nil {
- return nil, err
- }
- defer rc.Close()
-
- slurp, err := ioutil.ReadAll(io.LimitReader(rc, size))
- if err != nil {
- return nil, err
- }
- return &file{
- name: name,
- Reader: bytes.NewReader(slurp),
- }, nil
-}
-
-func (fs *gcsFS) Stat(name string) (os.FileInfo, error) { return fs.Lstat(name) }
-func (fs *gcsFS) Lstat(name string) (os.FileInfo, error) {
- bucket, fileName, err := fs.parseName(name)
- if err != nil {
- return nil, err
- }
- attrs, err := fs.sc.Bucket(bucket).Object(fileName).Attrs(fs.ctx)
- if err == storage.ErrObjectNotExist {
- return nil, os.ErrNotExist
- }
- if err != nil {
- return nil, err
- }
- return &statInfo{
- name: attrs.Name,
- size: attrs.Size,
- }, nil
-}
-
-func (fs *gcsFS) MkdirAll(path string, perm os.FileMode) error { return nil }
-
-func (fs *gcsFS) OpenFile(name string, flag int, perm os.FileMode) (wkfs.FileWriter, error) {
- bucket, fileName, err := fs.parseName(name)
- if err != nil {
- return nil, err
- }
- switch flag {
- case os.O_WRONLY | os.O_CREATE | os.O_EXCL:
- case os.O_WRONLY | os.O_CREATE | os.O_TRUNC:
- default:
- return nil, fmt.Errorf("Unsupported OpenFlag flag mode %d on Google Cloud Storage", flag)
- }
- if flag&os.O_EXCL != 0 {
- if _, err := fs.Stat(name); err == nil {
- return nil, os.ErrExist
- }
- }
- // TODO(mpl): consider adding perm to the object's ObjectAttrs.Metadata
- return fs.sc.Bucket(bucket).Object(fileName).NewWriter(fs.ctx), nil
-}
-
-func (fs *gcsFS) Remove(name string) error {
- bucket, fileName, err := fs.parseName(name)
- if err != nil {
- return err
- }
- return fs.sc.Bucket(bucket).Object(fileName).Delete(fs.ctx)
-}
-
-type statInfo struct {
- name string
- size int64
- isDir bool
- modtime time.Time
-}
-
-func (si *statInfo) IsDir() bool { return si.isDir }
-func (si *statInfo) ModTime() time.Time { return si.modtime }
-func (si *statInfo) Mode() os.FileMode { return 0644 }
-func (si *statInfo) Name() string { return path.Base(si.name) }
-func (si *statInfo) Size() int64 { return si.size }
-func (si *statInfo) Sys() interface{} { return nil }
-
-type file struct {
- name string
- *bytes.Reader
-}
-
-func (*file) Close() error { return nil }
-func (f *file) Name() string { return path.Base(f.name) }
-func (f *file) Stat() (os.FileInfo, error) {
- panic("Stat not implemented on /gcs/ files yet")
-}