mysql-script-deploy/lib/buildMethods.js

Deploys your schema changes and routines, it versions all your changes and roles back failed routines to previous versions

module.exports = function(db1, db2, database) {

    function checkIfDatabaseExists(callback) {
        var sql = 'show databases like "' + database + '"';
        db1.query(sql, function(err, result) {
            if (err) return callback(err);
            var exists = result.length > 0;
            return callback(null, exists);
        });
    }

    function createDatabase(exists, callback) {
        if (exists) return callback();
        console.log('| Database does not exist');
        console.log('| Creating database');
        var sql = 'CREATE DATABASE ' + database + ' CHARACTER SET utf8 COLLATE utf8_general_ci';
        db1.query(sql, function(err) {
            if (err) return callback(err);
            console.log('| Database created successfully');
            callback();
        });
    }

    function checkIfLockTableExists(callback) {
        var sql = 'show tables like "database_update_lock"';
        db2.query(sql, function(err, result) {
            if (err) return callback(err);
            var exists = result.length > 0;
            return callback(null, exists);
        });
    }

    function createDatabaseUpdateLockTable(exists, callback) {
        if (exists) return callback();
        console.log('| Database update lock table missing');
        console.log('| Creating missing table');
        var sql = 'create table database_update_lock (' +
            'id int unsigned primary key not null,' +
            'lastLockedAt datetime null,' +
            'lockedWith varchar(36) null,' +
            'lastLockedByIp varchar(15) null)';
        db2.query(sql, function(err) {
            if (err) return callback(err);
            console.log('| Table created successfully');
            insertInitialLockRow(function(err) {
                if (err) return callback(err);
                callback();
            });
        });
    }

    function insertInitialLockRow(callback) {
        var sql = 'insert into database_update_lock (id) values (?)';
        db2.query(sql, [1], callback);
    }

    function checkIfScriptHistoryTableExists(callback) {
        var sql = 'show tables like "database_script_history"';
        db2.query(sql, function(err, result) {
            if (err) return callback(err);
            var exists = result.length > 0;
            callback(null, exists);
        });
    }

    function createScriptHistory(exists, callback) {
        if (exists) return callback();
        console.log('| Database script history table missing');
        console.log('| Creating missing table');
        var sql = 'create table database_script_history (' +
                    'version int unsigned not null,' +
                    'createdAt datetime null,' +
                    'name varchar(100),' +
                    'status varchar(10) null,' +
                    'index (version))';
        db2.query(sql, function(err) {
            if (err) return callback(err);
            console.log('| Table created successfully');
            callback();
        });
    }

    function checkIfRoutineHistoryTableExists(callback) {
        var sql = 'show tables like "database_routine_history"';
        db2.query(sql, function(err, result) {
            if (err) return callback(err);
            var exists = result.length > 0;
            callback(null, exists);
        });
    }

    function createProcHistory(exists, callback) {
        if (exists) return callback();
        console.log('| Database routine history table missing');
        console.log('| Creating missing table');
        var sql = 'create table database_routine_history (' +
                    'id int unsigned auto_increment not null primary key,' +
                    'name varchar(100) not null,' +
                    'md5 varchar(32) not null,' +
                    'createdAt datetime null,' +
                    'status varchar(10),' +
                    'index (name))';

        db2.query(sql, function(err) {
            if (err) return callback(err);
            console.log('| Table created successfully');
            callback();
        });
    }

    return {
        checkIfDatabaseExists: checkIfDatabaseExists,
        createDatabase: createDatabase,
        checkIfLockTableExists: checkIfLockTableExists,
        createDatabaseUpdateLockTable: createDatabaseUpdateLockTable,
        checkIfScriptHistoryTableExists: checkIfScriptHistoryTableExists,
        createScriptHistory: createScriptHistory,
        checkIfProcHistoryTableExists: checkIfRoutineHistoryTableExists,
        createProcHistory: createProcHistory
    };
};