[WIP] v0.7.0 fixes and changes to cache and remotefetcher

pkg/remotefetcher/local.go

@@ -0,0 +1,42 @@
+package remotefetcher
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"io"
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+type LocalFetcher struct {
+	config FetcherConfig
+}
+
+// Fetch retrieves the file from the specified local file path
+func (l *LocalFetcher) Fetch(source string) ([]byte, error) {
+	// Check if the file exists
+	if _, err := os.Stat(source); os.IsNotExist(err) {
+		if l.config.IgnoreFileNotFound {
+			return nil, ErrFileNotFound
+		}
+		return nil, nil
+	}
+	file, err := os.Open(source)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	return io.ReadAll(file)
+}
+
+// Parse decodes the raw data into the provided target structure
+func (l *LocalFetcher) Parse(data []byte, target interface{}) error {
+	return yaml.Unmarshal(data, target)
+}
+
+func (l *LocalFetcher) Hash(data []byte) string {
+	hash := sha256.Sum256(data)
+	return hex.EncodeToString(hash[:])
+}