private void ScriptMigrations()

in Source/NuGetGallery.Operations/Tasks/RunMigrationsTask.cs [43:79]

• 33 lines of code
• 4 McCabe index (conditional complexity)

        private void ScriptMigrations(MigratorBase migrator)
        {
            var scriptingMigrator = new MigratorScriptingDecorator(migrator);

            string start;
            string target;
            if (migrator.GetDatabaseMigrations().Any(s => IsMigration(s, TargetMigration)))
            {
                // Down migration, start is null, target is the target
                start = null;
                target = migrator.GetDatabaseMigrations().Single(s => IsMigration(s, TargetMigration));
            }
            else
            {
                // Up migration, go from start to target.
                start = migrator.GetDatabaseMigrations().FirstOrDefault();
                target = migrator.GetLocalMigrations().Single(s => IsMigration(s, TargetMigration));
            }

            string startName = start ?? migrator.GetDatabaseMigrations().FirstOrDefault();
            string scriptFileName = String.Format("{0}-{1}.sql", startName, target);
            if(File.Exists(scriptFileName)) {
                Log.Error("File already exists: {0}", scriptFileName);
                return;
            }

            // Generate script
            Log.Info("Scripting migration from {0} to {1}", startName, target);
            if (!WhatIf)
            {
                string script = scriptingMigrator.ScriptUpdate(start, target);

                // Write the script
                File.WriteAllText(scriptFileName, script);
            }
            Log.Info("Wrote script to {0}", scriptFileName);
        }