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Merge pull request #96 from weaveworks/rawstorage
Factor out RawStorage from Storage
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,3 +1,4 @@ | ||
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| /* | ||
| Note: This file is autogenerated! Do not edit it manually! | ||
| Edit client_image_template.go instead, and run | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,4 @@ | ||
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| /* | ||
| Note: This file is autogenerated! Do not edit it manually! | ||
| Edit client_kernel_template.go instead, and run | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,4 @@ | ||
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| /* | ||
| Note: This file is autogenerated! Do not edit it manually! | ||
| Edit client_vm_template.go instead, and run | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| package storage | ||
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| import ( | ||
| "io/ioutil" | ||
| "os" | ||
| "path" | ||
| "strings" | ||
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| "github.com/weaveworks/ignite/pkg/constants" | ||
| "github.com/weaveworks/ignite/pkg/util" | ||
| ) | ||
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| type RawStorage interface { | ||
| Read(key string) ([]byte, error) | ||
| Exists(key string) bool | ||
| Write(key string, content []byte) error | ||
| Delete(key string) error | ||
| List(directory string) ([]string, error) | ||
| } | ||
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| func NewDefaultRawStorage(dir string) RawStorage { | ||
| return &DefaultRawStorage{ | ||
| dir: dir, | ||
| } | ||
| } | ||
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| type DefaultRawStorage struct { | ||
| dir string | ||
| } | ||
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| func (r *DefaultRawStorage) realPath(key string) string { | ||
| // The "/" prefix is enforced | ||
| if !strings.HasPrefix(key, "/") { | ||
| key = "/" + key | ||
| } | ||
| // If a top-level kind is described, and not a file, return the kind directory path | ||
| if len(strings.Split(key, "/")) == 2 { | ||
| return path.Join(r.dir, key) | ||
| } | ||
| // Return the file location, with the metadata.json suffix | ||
| return path.Join(r.dir, key, constants.METADATA) | ||
| } | ||
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| func (r *DefaultRawStorage) Read(key string) ([]byte, error) { | ||
| file := r.realPath(key) | ||
| return ioutil.ReadFile(file) | ||
| } | ||
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| func (r *DefaultRawStorage) Exists(key string) bool { | ||
| file := r.realPath(key) | ||
| return util.FileExists(file) | ||
| } | ||
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| func (r *DefaultRawStorage) Write(key string, content []byte) error { | ||
| file := r.realPath(key) | ||
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| // Create the underlying directories if they do not exist already | ||
| if !r.Exists(key) { | ||
| if err := os.MkdirAll(path.Dir(file), 0755); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return ioutil.WriteFile(file, content, 0644) | ||
| } | ||
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| func (r *DefaultRawStorage) Delete(key string) error { | ||
| file := r.realPath(key) | ||
| dir := path.Dir(file) | ||
| return os.RemoveAll(dir) | ||
| } | ||
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| func (r *DefaultRawStorage) List(parentKey string) ([]string, error) { | ||
| realPath := r.realPath(parentKey) | ||
| entries, err := ioutil.ReadDir(realPath) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| result := []string{} | ||
| for _, entry := range entries { | ||
| entryPath := path.Join(parentKey, entry.Name()) | ||
| result = append(result, entryPath) | ||
| } | ||
| return result, nil | ||
| } |
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