add build scripts and resolve migration

local/migrations/004_fix_ddl_comments.go

@@ -0,0 +1,106 @@
+package migrations
+
+import (
+	"acc-server-manager/local/utl/logging"
+	"fmt"
+	"regexp"
+	"strings"
+
+	"gorm.io/gorm"
+)
+
+var sqlLineCommentRegexp = regexp.MustCompile(`--[^\n]*`)
+
+type Migration004FixDDLComments struct {
+	DB *gorm.DB
+}
+
+func NewMigration004FixDDLComments(db *gorm.DB) *Migration004FixDDLComments {
+	return &Migration004FixDDLComments{DB: db}
+}
+
+func (m *Migration004FixDDLComments) Up() error {
+	if err := m.DB.AutoMigrate(&MigrationRecord{}); err != nil {
+		return fmt.Errorf("failed to create migration tracking table: %v", err)
+	}
+
+	var record MigrationRecord
+	if err := m.DB.Where("migration_name = ?", "004_fix_ddl_comments").First(&record).Error; err == nil {
+		logging.Info("DDL comment fix migration already applied, skipping")
+		return nil
+	}
+
+	var tables []string
+	if err := m.DB.Raw(
+		"SELECT name FROM sqlite_master WHERE type = 'table' AND sql LIKE '%--%' ORDER BY name",
+	).Scan(&tables).Error; err != nil {
+		return fmt.Errorf("failed to query tables with DDL comments: %v", err)
+	}
+
+	if len(tables) == 0 {
+		logging.Info("No tables with DDL comments found, skipping")
+	}
+
+	for _, table := range tables {
+		if err := m.rebuildTable(table); err != nil {
+			return fmt.Errorf("failed to rebuild table %q: %v", table, err)
+		}
+	}
+
+	record = MigrationRecord{
+		MigrationName: "004_fix_ddl_comments",
+		AppliedAt:     "datetime('now')",
+		Success:       true,
+		Notes:         fmt.Sprintf("Rebuilt %d table(s): %s", len(tables), strings.Join(tables, ", ")),
+	}
+	if err := m.DB.Create(&record).Error; err != nil {
+		return fmt.Errorf("failed to record migration: %v", err)
+	}
+
+	return nil
+}
+
+func (m *Migration004FixDDLComments) rebuildTable(table string) error {
+	var originalDDL string
+	if err := m.DB.Raw(
+		"SELECT sql FROM sqlite_master WHERE type = 'table' AND name = ?", table,
+	).Row().Scan(&originalDDL); err != nil {
+		return err
+	}
+
+	cleanDDL := sqlLineCommentRegexp.ReplaceAllString(originalDDL, "")
+
+	tmpTable := table + "__fixed"
+	createTmp := strings.Replace(cleanDDL, `"`+table+`"`, "`"+tmpTable+"`", 1)
+	if createTmp == cleanDDL {
+		createTmp = strings.Replace(cleanDDL, table, "`"+tmpTable+"`", 1)
+	}
+
+	logging.Info("Rebuilding table %q to remove DDL comments...", table)
+
+	return m.DB.Transaction(func(tx *gorm.DB) error {
+		for _, sql := range []string{
+			"PRAGMA foreign_keys = OFF",
+			fmt.Sprintf("DROP TABLE IF EXISTS `%s`", tmpTable),
+			createTmp,
+			fmt.Sprintf("INSERT INTO `%s` SELECT * FROM `%s`", tmpTable, table),
+			fmt.Sprintf("DROP TABLE `%s`", table),
+			fmt.Sprintf("ALTER TABLE `%s` RENAME TO `%s`", tmpTable, table),
+			"PRAGMA foreign_keys = ON",
+		} {
+			if err := tx.Exec(sql).Error; err != nil {
+				return fmt.Errorf("exec %q: %w", sql, err)
+			}
+		}
+		logging.Info("Table %q rebuilt successfully", table)
+		return nil
+	})
+}
+
+func (m *Migration004FixDDLComments) Down() error {
+	return fmt.Errorf("DDL comment fix migration rollback is not supported")
+}
+
+func RunFixDDLCommentsMigration(db *gorm.DB) error {
+	return NewMigration004FixDDLComments(db).Up()
+}