stores: get rid of migrate bool

stores/migrations.go

@@ -24,13 +24,13 @@ func performMigrations(db *gorm.DB, logger *zap.SugaredLogger) error {
 		{
 			ID: "00001_object_metadata",
 			Migrate: func(tx *gorm.DB) error {
-				return performMigration(tx, "00001_object_metadata", false, logger)
+				return performMigration(tx, "main", "00001_object_metadata", logger)
 			},
 		},
 		{
 			ID: "00002_prune_slabs_trigger",
 			Migrate: func(tx *gorm.DB) error {
-				err := performMigration(tx, "00002_prune_slabs_trigger", false, logger)
+				err := performMigration(tx, "main", "00002_prune_slabs_trigger", logger)
 				if err != nil && strings.Contains(err.Error(), errMySQLNoSuperPrivilege.Error()) {
 					logger.Warn("migration 00002_prune_slabs_trigger requires the user to have the SUPER privilege to register triggers")
 				}
@@ -43,7 +43,7 @@ func performMigrations(db *gorm.DB, logger *zap.SugaredLogger) error {
 	m := gormigrate.New(db, gormigrate.DefaultOptions, migrations)
 
 	// Set init function.
-	m.InitSchema(initSchema(db, false, logger))
+	m.InitSchema(initSchema(db, "main", logger))
 
 	// Perform migrations.
 	if err := m.Migrate(); err != nil {

stores/migrations/mysql/main/schema.sql

@@ -452,4 +452,7 @@ AND NOT EXISTS (
     SELECT 1
     FROM slices
     WHERE slices.db_slab_id = OLD.db_slab_id
-);
+);
+
+-- create default bucket
+INSERT INTO buckets (created_at, name) VALUES (CURRENT_TIMESTAMP, 'default');

stores/migrations/sqlite/main/schema.sql

@@ -183,4 +183,7 @@ BEGIN
         FROM slices
         WHERE slices.db_slab_id = OLD.db_slab_id
     );
-END;
+END;
+
+-- create default bucket
+INSERT INTO buckets (created_at, name) VALUES (CURRENT_TIMESTAMP, 'default');

stores/migrations_metrics.go

@@ -20,7 +20,7 @@ func performMetricsMigrations(tx *gorm.DB, logger *zap.SugaredLogger) error {
 	m := gormigrate.New(tx, gormigrate.DefaultOptions, migrations)
 
 	// Set init function.
-	m.InitSchema(initSchema(tx, true, logger))
+	m.InitSchema(initSchema(tx, "metrics", logger))
 
 	// Perform migrations.
 	if err := m.Migrate(); err != nil {

stores/migrations_utils.go

@@ -4,64 +4,42 @@ import (
 	"fmt"
 
 	gormigrate "github.com/go-gormigrate/gormigrate/v2"
-	"go.sia.tech/renterd/api"
 	"go.uber.org/zap"
 	"gorm.io/gorm"
 )
 
 // initSchema is executed only on a clean database. Otherwise the individual
 // migrations are executed.
-func initSchema(db *gorm.DB, metrics bool, logger *zap.SugaredLogger) gormigrate.InitSchemaFunc {
+func initSchema(db *gorm.DB, name string, logger *zap.SugaredLogger) gormigrate.InitSchemaFunc {
 	return func(tx *gorm.DB) error {
-		if metrics {
-			logger.Info("initializing metrics schema")
-		} else {
-			logger.Info("initializing schema")
-		}
+		logger.Infof("initializing '%s' schema", name)
 
-		// build filename
-		filename := "schema"
-		err := execSQLFile(tx, metrics, filename)
+		// init schema
+		err := execSQLFile(tx, name, "schema")
 		if err != nil {
 			return fmt.Errorf("failed to init schema: %w", err)
 		}
 
-		// add default bucket.
-		if !metrics {
-			if err := tx.Create(&dbBucket{
-				Name: api.DefaultBucketName,
-			}).Error; err != nil {
-				return fmt.Errorf("failed to create default bucket: %v", err)
-			}
-		}
-
 		logger.Info("initialization complete")
 		return nil
 	}
 }
 
-func performMigration(db *gorm.DB, name string, metrics bool, logger *zap.SugaredLogger) error {
-	logger.Infof("performing migration %s", name)
-
-	// build filename
-	filename := fmt.Sprintf("migration_%s", name)
+func performMigration(db *gorm.DB, kind, migration string, logger *zap.SugaredLogger) error {
+	logger.Infof("performing %s migration '%s'", kind, migration)
 
 	// execute migration
-	err := execSQLFile(db, metrics, filename)
+	err := execSQLFile(db, kind, fmt.Sprintf("migration_%s", migration))
 	if err != nil {
-		return fmt.Errorf("migration %s failed: %w", name, err)
+		return fmt.Errorf("migration '%s' failed: %w", migration, err)
 	}
 
-	logger.Infof("migration %s complete", name)
+	logger.Infof("migration '%s' complete", migration)
 	return nil
 }
 
-func execSQLFile(db *gorm.DB, metrics bool, filename string) error {
+func execSQLFile(db *gorm.DB, folder, filename string) error {
 	// build path
-	folder := "main"
-	if metrics {
-		folder = "metrics"
-	}
 	protocol := "mysql"
 	if isSQLite(db) {
 		protocol = "sqlite"