cleanup: provider disabled versioning states (#769)

provider.go

@@ -175,6 +175,9 @@ func (p *Provider) GetVersions(ctx context.Context) (current, target int64, err
 // which migrations were applied. For example, if migrations were applied out of order (1,4,2,3),
 // this method returns 4. If no migrations have been applied, it returns 0.
 func (p *Provider) GetDBVersion(ctx context.Context) (int64, error) {
+	if p.cfg.disableVersioning {
+		return -1, errors.New("getting database version not supported when versioning is disabled")
+	}
 	return p.getDBMaxVersion(ctx, nil)
 }
 
@@ -596,13 +599,17 @@ func (p *Provider) status(ctx context.Context) (_ []*MigrationStatus, retErr err
 			},
 			State: StatePending,
 		}
-		dbResult, err := p.store.GetMigration(ctx, conn, m.Version)
-		if err != nil && !errors.Is(err, database.ErrVersionNotFound) {
-			return nil, err
-		}
-		if dbResult != nil {
-			migrationStatus.State = StateApplied
-			migrationStatus.AppliedAt = dbResult.Timestamp
+		// If versioning is disabled, we can't check the database for applied migrations, so we
+		// assume all migrations are pending.
+		if !p.cfg.disableVersioning {
+			dbResult, err := p.store.GetMigration(ctx, conn, m.Version)
+			if err != nil && !errors.Is(err, database.ErrVersionNotFound) {
+				return nil, err
+			}
+			if dbResult != nil {
+				migrationStatus.State = StateApplied
+				migrationStatus.AppliedAt = dbResult.Timestamp
+			}
 		}
 		status = append(status, migrationStatus)
 	}

provider_run_test.go

@@ -506,10 +506,9 @@ func TestNoVersioning(t *testing.T) {
 			upResult, err := p.Up(ctx)
 			check.NoError(t, err)
 			check.Number(t, len(upResult), 2)
-			// Confirm no changes to the versioned schema in the DB
-			currentVersion, err := p.GetDBVersion(ctx)
-			check.NoError(t, err)
-			check.Number(t, baseVersion, currentVersion)
+			// When versioning is disabled, we cannot track the version of the seed files.
+			_, err = p.GetDBVersion(ctx)
+			check.HasError(t, err)
 			seedOwnerCount, err := countSeedOwners(db)
 			check.NoError(t, err)
 			check.Number(t, seedOwnerCount, wantSeedOwnerCount)
@@ -519,10 +518,9 @@ func TestNoVersioning(t *testing.T) {
 			downResult, err := p.DownTo(ctx, 0)
 			check.NoError(t, err)
 			check.Number(t, len(downResult), 2)
-			// Confirm no changes to the versioned schema in the DB
-			currentVersion, err := p.GetDBVersion(ctx)
-			check.NoError(t, err)
-			check.Number(t, baseVersion, currentVersion)
+			// When versioning is disabled, we cannot track the version of the seed files.
+			_, err = p.GetDBVersion(ctx)
+			check.HasError(t, err)
 			seedOwnerCount, err := countSeedOwners(db)
 			check.NoError(t, err)
 			check.Number(t, seedOwnerCount, 0)