Changeset 0.12.0 (#63)

server/storage/init.go

@@ -0,0 +1,78 @@
+package storage
+
+import (
+	"fmt"
+	"log"
+	"os"
+)
+
+// Init creates an ObjectStore based on the configuration.
+//
+// Auto-detection when backend is empty:
+//   - If storagePath is writable → PVC (implicit)
+//   - If storagePath is missing/unwritable → nil (storage disabled)
+//
+// Explicit backends:
+//   - "pvc" → PVC, fail if path is not writable
+//   - "s3"  → S3-compatible (MinIO, Ceph RGW, AWS), fail if not reachable
+func Init(backend, storagePath string, s3Cfg *S3Config) (ObjectStore, error) {
+	switch backend {
+	case "pvc":
+		// Explicit PVC — fail if not writable
+		s, err := NewPVC(storagePath)
+		if err != nil {
+			return nil, fmt.Errorf("storage: PVC backend at %q: %w", storagePath, err)
+		}
+		log.Printf("  📁 Storage: PVC at %s", storagePath)
+		return s, nil
+
+	case "s3":
+		if s3Cfg == nil {
+			return nil, fmt.Errorf("storage: S3 backend requires S3_BUCKET and credentials")
+		}
+		s, err := NewS3(*s3Cfg)
+		if err != nil {
+			return nil, fmt.Errorf("storage: S3 backend: %w", err)
+		}
+		endpoint := s3Cfg.Endpoint
+		if endpoint == "" {
+			endpoint = "AWS"
+		}
+		log.Printf("  📁 Storage: S3 at %s/%s (prefix=%q)", endpoint, s3Cfg.Bucket, s3Cfg.Prefix)
+		return s, nil
+
+	case "":
+		// Auto-detect: try PVC if path exists or is creatable
+		s, err := NewPVC(storagePath)
+		if err != nil {
+			// Path not writable — storage disabled, not an error
+			log.Printf("  📁 Storage: disabled (path %s not writable)", storagePath)
+			return nil, nil
+		}
+		log.Printf("  📁 Storage: PVC at %s (auto-detected)", storagePath)
+		return s, nil
+
+	default:
+		return nil, fmt.Errorf("storage: unknown backend %q (expected pvc or s3)", backend)
+	}
+}
+
+// IsPathWritable checks if a directory path exists and is writable.
+// Used by auto-detection. Does not create the directory.
+func IsPathWritable(path string) bool {
+	info, err := os.Stat(path)
+	if err != nil {
+		return false
+	}
+	if !info.IsDir() {
+		return false
+	}
+
+	// Try writing a probe file
+	probe := path + "/.writable-probe"
+	if err := os.WriteFile(probe, []byte("ok"), 0o644); err != nil {
+		return false
+	}
+	os.Remove(probe)
+	return true
+}