dialect/sql/schema: option to enable atlas sum file

dialect/sql/schema/atlas.go

@@ -264,6 +264,13 @@ func WithFormatter(fmt migrate.Formatter) MigrateOption {
 	}
 }
 
+// WithSumFile instructs atlas to generate a migration directory integrity sum file as well.
+func WithSumFile() MigrateOption {
+	return func(m *Migrate) {
+		m.atlas.genSum = true
+	}
+}
+
 type (
 	// atlasOptions describes the options for atlas.
 	atlasOptions struct {
@@ -273,6 +280,7 @@ type (
 		skip    ChangeKind
 		dir     migrate.Dir
 		fmt     migrate.Formatter
+		genSum  bool
 	}
 
 	// atBuilder must be implemented by the different drivers in

dialect/sql/schema/migrate.go

@@ -186,7 +186,9 @@ func (m *Migrate) NamedDiff(ctx context.Context, name string, tables ...*Table)
 	}
 	opts := []migrate.PlannerOption{
 		migrate.WithFormatter(m.atlas.fmt),
-		migrate.DisableChecksum(),
+	}
+	if !m.atlas.genSum {
+		opts = append(opts, migrate.DisableChecksum())
 	}
 	return migrate.NewPlanner(nil, m.atlas.dir, opts...).WritePlan(plan)
 }

entc/integration/migrate/migrate_test.go

@@ -7,11 +7,14 @@ package migrate
 import (
 	"context"
 	"fmt"
+	"io/fs"
 	"math"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"testing"
 
+	"ariga.io/atlas/sql/sqltool"
 	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/schema"
@@ -23,6 +26,7 @@ import (
 	"entgo.io/ent/entc/integration/migrate/entv2/customtype"
 	migratev2 "entgo.io/ent/entc/integration/migrate/entv2/migrate"
 	"entgo.io/ent/entc/integration/migrate/entv2/user"
+	"entgo.io/ent/entc/integration/migrate/versioned"
 
 	"ariga.io/atlas/sql/migrate"
 	atlas "ariga.io/atlas/sql/schema"
@@ -54,6 +58,10 @@ func TestMySQL(t *testing.T) {
 			}
 			NicknameSearch(t, clientv2)
 			TimePrecision(t, drv, "SELECT datetime_precision FROM information_schema.columns WHERE table_name = ? AND column_name = ?")
+
+			require.NoError(t, err, root.Exec(ctx, "DROP DATABASE IF EXISTS migrate", []interface{}{}, new(sql.Result)))
+			require.NoError(t, root.Exec(ctx, "CREATE DATABASE IF NOT EXISTS migrate", []interface{}{}, new(sql.Result)))
+			Versioned(t, versioned.NewClient(versioned.Driver(drv)))
 		})
 	}
 }
@@ -157,6 +165,41 @@ func TestStorageKey(t *testing.T) {
 	require.Equal(t, "user_friend_id2", migratev2.FriendsTable.ForeignKeys[1].Symbol)
 }
 
+func Versioned(t *testing.T, client *versioned.Client) {
+	ctx := context.Background()
+
+	p := t.TempDir()
+	dir, err := migrate.NewLocalDir(p)
+	require.NoError(t, err)
+	require.NoError(t, client.Schema.Diff(ctx, schema.WithDir(dir)))
+	require.Equal(t, 2, countFiles(t, dir))
+
+	p = t.TempDir()
+	dir, err = migrate.NewLocalDir(p)
+	require.NoError(t, err)
+	require.NoError(t, client.Schema.Diff(ctx, schema.WithDir(dir), schema.WithFormatter(sqltool.GooseFormatter)))
+	require.Equal(t, 1, countFiles(t, dir))
+
+	p = t.TempDir()
+	dir, err = migrate.NewLocalDir(p)
+	require.NoError(t, err)
+	require.NoError(t, client.Schema.Diff(ctx, schema.WithDir(dir), schema.WithFormatter(sqltool.FlywayFormatter)))
+	require.Equal(t, 2, countFiles(t, dir))
+
+	p = t.TempDir()
+	dir, err = migrate.NewLocalDir(p)
+	require.NoError(t, err)
+	require.NoError(t, client.Schema.Diff(ctx, schema.WithDir(dir), schema.WithFormatter(sqltool.LiquibaseFormatter)))
+	require.Equal(t, 1, countFiles(t, dir))
+
+	p = t.TempDir()
+	dir, err = migrate.NewLocalDir(p)
+	require.NoError(t, err)
+	require.NoError(t, client.Schema.Diff(ctx, schema.WithDir(dir), schema.WithSumFile()))
+	require.Equal(t, 3, countFiles(t, dir))
+	require.FileExists(t, filepath.Join(p, "atlas.sum"))
+}
+
 func V1ToV2(t *testing.T, dialect string, clientv1 *entv1.Client, clientv2 *entv2.Client) {
 	ctx := context.Background()
 
@@ -403,3 +446,9 @@ func TimePrecision(t *testing.T, drv *sql.Driver, query string) {
 func idRange(t *testing.T, id, l, h int) {
 	require.Truef(t, id > l && id < h, "id %s should be between %d to %d", id, l, h)
 }
+
+func countFiles(t *testing.T, d migrate.Dir) int {
+	files, err := fs.ReadDir(d, "")
+	require.NoError(t, err)
+	return len(files)
+}