84 lines
1.7 KiB
Go
84 lines
1.7 KiB
Go
package secrets
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io/fs"
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"os"
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"path/filepath"
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)
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type fsStore struct {
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dirPath string
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}
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type fsStorePayload[Body any] struct {
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Version int
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Body Body
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}
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// NewFSStore returns a Store which will store secrets to the given directory.
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func NewFSStore(dirPath string) (Store, error) {
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err := os.Mkdir(dirPath, 0700)
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if err != nil && !errors.Is(err, fs.ErrExist) {
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return nil, fmt.Errorf("making directory: %w", err)
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}
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return &fsStore{dirPath}, nil
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}
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func (s *fsStore) path(id ID) string {
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return filepath.Join(s.dirPath, string(id))
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}
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func (s *fsStore) Set(_ context.Context, id ID, payload any) error {
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path := s.path(id)
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f, err := os.Create(path)
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if err != nil {
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return fmt.Errorf("creating file %q: %w", path, err)
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}
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defer f.Close()
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if err := json.NewEncoder(f).Encode(fsStorePayload[any]{
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Version: 1,
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Body: payload,
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}); err != nil {
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return fmt.Errorf("writing JSON encoded payload to %q: %w", path, err)
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}
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return nil
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}
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func (s *fsStore) Get(_ context.Context, into any, id ID) error {
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path := s.path(id)
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f, err := os.Open(path)
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if errors.Is(err, fs.ErrNotExist) {
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return ErrNotFound
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} else if err != nil {
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return fmt.Errorf("creating file %q: %w", path, err)
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}
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defer f.Close()
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var fullPayload fsStorePayload[json.RawMessage]
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if err := json.NewDecoder(f).Decode(&fullPayload); err != nil {
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return fmt.Errorf("decoding JSON payload from %q: %w", path, err)
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}
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if fullPayload.Version != 1 {
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return fmt.Errorf(
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"unexpected JSON payload version %d", fullPayload.Version,
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)
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}
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if err := json.Unmarshal(fullPayload.Body, into); err != nil {
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return fmt.Errorf(
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"decoding JSON payload body from %q into %T: %w", path, into, err,
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)
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}
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return nil
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}
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