eventstore/cmd: fix mmm deinitialization.

eventstore/cmd/eventstore/main.go

@@ -17,7 +17,10 @@ import (
 	"github.com/urfave/cli/v3"
 )
 
-var db eventstore.Store
+var (
+	db  eventstore.Store
+	end func()
+)
 
 var app = &cli.Command{
 	Name:      "eventstore",
@@ -71,18 +74,31 @@ var app = &cli.Command{
 		switch typ {
 		case "lmdb":
 			db = &lmdb.LMDBBackend{Path: path}
+			if err := db.Init(); err != nil {
+				return ctx, err
+			}
+			end = db.Close
 		case "boltdb":
 			db = &boltdb.BoltBackend{Path: path}
+			if err := db.Init(); err != nil {
+				return ctx, err
+			}
+			end = db.Close
 		case "mmm":
 			var err error
-			if db, err = doMmmInit(path); err != nil {
+			if db, err, end = doMmmInit(path); err != nil {
+				if end != nil {
+					end()
+				}
 				return ctx, err
 			}
 		case "file":
 			db = &slicestore.SliceStore{}
+			if err := db.Init(); err != nil {
+				return ctx, err
+			}
 
-			// run this after we've called db.Init()
-			defer func() {
+			// fill in the slicestore with the data from the file
 			f, err := os.Open(path)
 			if err != nil {
 				log.Printf("failed to file at '%s': %s\n", path, err)
@@ -99,17 +115,17 @@ var app = &cli.Command{
 				db.SaveEvent(evt)
 				i++
 			}
-			}()
+
+			end = func() {
+				db.Close()
+				f.Close()
+			}
 		case "":
 			return ctx, fmt.Errorf("couldn't determine store type, you can use --type to specify it manually")
 		default:
 			return ctx, fmt.Errorf("'%s' store type is not supported by this CLI", typ)
 		}
 
-		if err := db.Init(); err != nil {
-			return ctx, err
-		}
-
 		return ctx, nil
 	},
 	Commands: []*cli.Command{
@@ -124,6 +140,7 @@ var app = &cli.Command{
 }
 
 func main() {
+	defer func() { end() }()
 	if err := app.Run(context.Background(), os.Args); err != nil {
 		fmt.Println(err)
 		os.Exit(1)

eventstore/cmd/eventstore/main_mmm.go

@@ -11,7 +11,7 @@ import (
 	"github.com/rs/zerolog"
 )
 
-func doMmmInit(path string) (eventstore.Store, error) {
+func doMmmInit(path string) (eventstore.Store, error, func()) {
 	logger := zerolog.New(zerolog.NewConsoleWriter(func(w *zerolog.ConsoleWriter) {
 		w.Out = os.Stderr
 	}))
@@ -20,8 +20,13 @@ func doMmmInit(path string) (eventstore.Store, error) {
 		Logger: &logger,
 	}
 	if err := mmmm.Init(); err != nil {
-		return nil, err
+		return nil, err, nil
 	}
 
-	return mmmm.EnsureLayer(filepath.Base(path))
+	end := func() {
+		mmmm.Close()
+	}
+
+	store, err := mmmm.EnsureLayer(filepath.Base(path))
+	return store, err, end
 }