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filestore.go
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/
filestore.go
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package store
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
)
func NewFilesystemStore(baseDir, metaSubDir, metaExtension, targetsSubDir string) (MetadataStore, error) {
metaDir := path.Join(baseDir, metaSubDir)
targetsDir := path.Join(baseDir, targetsSubDir)
// Make sure we can create the necessary dirs and they are writable
err := os.MkdirAll(metaDir, 0744)
if err != nil {
return nil, err
}
err = os.MkdirAll(targetsDir, 0744)
if err != nil {
return nil, err
}
return &filesystemStore{
baseDir: baseDir,
metaDir: metaDir,
metaExtension: metaExtension,
targetsDir: targetsDir,
}, nil
}
type filesystemStore struct {
baseDir string
metaDir string
metaExtension string
targetsDir string
}
func (f *filesystemStore) GetMeta(name string, size int64) (json.RawMessage, error) {
fileName := fmt.Sprintf("%s.%s", name, f.metaExtension)
path := filepath.Join(f.metaDir, fileName)
meta, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
return meta, nil
}
func (f *filesystemStore) SetMeta(name string, meta json.RawMessage) error {
fileName := fmt.Sprintf("%s.%s", name, f.metaExtension)
path := filepath.Join(f.metaDir, fileName)
if err := ioutil.WriteFile(path, meta, 0644); err != nil {
return err
}
return nil
}