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authorNiall Sheridan <nsheridan@gmail.com>2016-06-06 14:44:38 +0100
committerNiall Sheridan <nsheridan@gmail.com>2016-06-06 14:44:38 +0100
commit067ad51b6a6ee8829612f51a6e6b2ade3eaa61b3 (patch)
tree301d2a7303e2b5db0c3fa1911d799e16f921d9dc /vendor/go4.org
parent5ca59399fe0880368f88d17c0c9d781d836969c6 (diff)
parenta18a13fb09eac00cdacf1f74080524182b7243de (diff)
Merge pull request #17 from nsheridan/vendor
update dependencies
Diffstat (limited to 'vendor/go4.org')
-rw-r--r--vendor/go4.org/LICENSE202
-rw-r--r--vendor/go4.org/wkfs/gcs/gcs.go196
-rw-r--r--vendor/go4.org/wkfs/wkfs.go132
3 files changed, 530 insertions, 0 deletions
diff --git a/vendor/go4.org/LICENSE b/vendor/go4.org/LICENSE
new file mode 100644
index 0000000..8f71f43
--- /dev/null
+++ b/vendor/go4.org/LICENSE
@@ -0,0 +1,202 @@
+ Apache License
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+
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+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
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diff --git a/vendor/go4.org/wkfs/gcs/gcs.go b/vendor/go4.org/wkfs/gcs/gcs.go
new file mode 100644
index 0000000..21f2551
--- /dev/null
+++ b/vendor/go4.org/wkfs/gcs/gcs.go
@@ -0,0 +1,196 @@
+/*
+Copyright 2014 The Camlistore 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"
+
+ "go4.org/wkfs"
+ "golang.org/x/net/context"
+ "golang.org/x/oauth2"
+ "golang.org/x/oauth2/google"
+ "google.golang.org/cloud"
+ "google.golang.org/cloud/compute/metadata"
+ "google.golang.org/cloud/storage"
+)
+
+// 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
+ }
+ projID, err := metadata.ProjectID()
+ if projID == "" || err != nil {
+ registerBrokenFS(fmt.Errorf("could not get GCE project ID: %v", err))
+ return
+ }
+ ctx := cloud.NewContext(projID, hc)
+ sc, err := storage.NewClient(ctx)
+ 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
+}
+
+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")
+}
diff --git a/vendor/go4.org/wkfs/wkfs.go b/vendor/go4.org/wkfs/wkfs.go
new file mode 100644
index 0000000..f4df062
--- /dev/null
+++ b/vendor/go4.org/wkfs/wkfs.go
@@ -0,0 +1,132 @@
+/*
+Copyright 2014 The Camlistore 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 wkfs implements the pluggable "well-known filesystem" abstraction layer.
+//
+// Instead of accessing files directly through the operating system
+// using os.Open or os.Stat, code should use wkfs.Open or wkfs.Stat,
+// which first try to intercept paths at well-known top-level
+// directories representing previously-registered mount types,
+// otherwise fall through to the operating system paths.
+//
+// Example of top-level well-known directories that might be
+// registered include /gcs/bucket/object for Google Cloud Storage or
+// /s3/bucket/object for AWS S3.
+package wkfs // import "go4.org/wkfs"
+
+import (
+ "io"
+ "io/ioutil"
+ "os"
+ "strings"
+)
+
+type File interface {
+ io.Reader
+ io.ReaderAt
+ io.Closer
+ io.Seeker
+ Name() string
+ Stat() (os.FileInfo, error)
+}
+
+type FileWriter interface {
+ io.Writer
+ io.Closer
+}
+
+func Open(name string) (File, error) { return fs(name).Open(name) }
+func Stat(name string) (os.FileInfo, error) { return fs(name).Stat(name) }
+func Lstat(name string) (os.FileInfo, error) { return fs(name).Lstat(name) }
+func MkdirAll(path string, perm os.FileMode) error { return fs(path).MkdirAll(path, perm) }
+func OpenFile(name string, flag int, perm os.FileMode) (FileWriter, error) {
+ return fs(name).OpenFile(name, flag, perm)
+}
+func Create(name string) (FileWriter, error) {
+ // like os.Create but WRONLY instead of RDWR because we don't
+ // expose a Reader here.
+ return OpenFile(name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0666)
+}
+
+func fs(name string) FileSystem {
+ for pfx, fs := range wkFS {
+ if strings.HasPrefix(name, pfx) {
+ return fs
+ }
+ }
+ return osFS{}
+}
+
+type osFS struct{}
+
+func (osFS) Open(name string) (File, error) { return os.Open(name) }
+func (osFS) Stat(name string) (os.FileInfo, error) { return os.Stat(name) }
+func (osFS) Lstat(name string) (os.FileInfo, error) { return os.Lstat(name) }
+func (osFS) MkdirAll(path string, perm os.FileMode) error { return os.MkdirAll(path, perm) }
+func (osFS) OpenFile(name string, flag int, perm os.FileMode) (FileWriter, error) {
+ return os.OpenFile(name, flag, perm)
+}
+
+type FileSystem interface {
+ Open(name string) (File, error)
+ OpenFile(name string, flag int, perm os.FileMode) (FileWriter, error)
+ Stat(name string) (os.FileInfo, error)
+ Lstat(name string) (os.FileInfo, error)
+ MkdirAll(path string, perm os.FileMode) error
+}
+
+// well-known filesystems
+var wkFS = map[string]FileSystem{}
+
+// RegisterFS registers a well-known filesystem. It intercepts
+// anything beginning with prefix (which must start and end with a
+// forward slash) and forwards it to fs.
+func RegisterFS(prefix string, fs FileSystem) {
+ if !strings.HasPrefix(prefix, "/") || !strings.HasSuffix(prefix, "/") {
+ panic("bogus prefix: " + prefix)
+ }
+ if _, dup := wkFS[prefix]; dup {
+ panic("duplication registration of " + prefix)
+ }
+ wkFS[prefix] = fs
+}
+
+// WriteFile writes data to a file named by filename.
+// If the file does not exist, WriteFile creates it with permissions perm;
+// otherwise WriteFile truncates it before writing.
+func WriteFile(filename string, data []byte, perm os.FileMode) error {
+ f, err := OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
+ if err != nil {
+ return err
+ }
+ n, err := f.Write(data)
+ if err == nil && n < len(data) {
+ err = io.ErrShortWrite
+ }
+ if err1 := f.Close(); err == nil {
+ err = err1
+ }
+ return err
+}
+
+func ReadFile(filename string) ([]byte, error) {
+ f, err := Open(filename)
+ if err != nil {
+ return nil, err
+ }
+ defer f.Close()
+ return ioutil.ReadAll(f)
+}