Fix mysql build error (#45)

* use require for mysql2 to fix compile error

* fix mysql build error

Author: joe-re

packages/server/rollup.config.js

@@ -16,18 +16,20 @@ export default {
     typescript({ tsconfig: 'tsconfig.cli.json' }),
     json(),
     resolve({
-      preferBuiltins: false
+      preferBuiltins: false,
     }),
     replace({
       delimiters: ['', ''],
       values: {
         'require(\'readable-stream/transform\')': 'require(\'stream\').Transform',
         'require("readable-stream/transform")': 'require("stream").Transform',
-        'readable-stream': 'stream'
+        'readable-stream': 'stream',
+        "require('./lib/pool.js')": 'class FakePool {}',
+        "require('./lib/pool_connection')": 'class FakePoolConnection {}' 
       }
     }),
     commonjs({
-      ignore: ['pg-native' , './native']
+      ignore: ['pg-native' , './native', './lib/pool_cluster.js', './pool.js', './lib/pool.js', './lib/pool_connection', './lib/pool_connection.js', './pool_connection.js']
     })
   ]
 };

packages/server/src/ambient.d.ts

@@ -1,2 +1,2 @@
 declare module 'yargs'
-declare module 'mysql2'
+declare module 'mysql2/promise'

packages/server/src/database_libs/AbstractClient.ts

@@ -27,7 +27,7 @@ export default abstract class AbstractClient {
 
   constructor(protected settings: Settings) {}
 
-  abstract connect(): boolean
+  abstract connect(): Promise<boolean> | boolean
   abstract disconnect(): void
   abstract getTables(): Promise<string[]>
   abstract getColumns(tableName: string): Promise<RawField[]>
@@ -57,7 +57,7 @@ export default abstract class AbstractClient {
         return []
       })
     }
-    if (!this.connect()) {
+    if (!(await this.connect())) {
       logger.error('AbstractClinet.getSchema: failed to connect database')
       return []
     }

packages/server/src/database_libs/MysqlClient.ts

@@ -1,4 +1,4 @@
-import * as mysql from 'mysql2'
+import * as mysql from 'mysql2/promise'
 import * as mysqlType from 'mysql'
 import { Settings } from '../SettingStore'
 import AbstractClient, { RawField } from './AbstractClient'
@@ -14,8 +14,8 @@ export default class MysqlClient extends AbstractClient {
   get DefaultHost() { return '127.0.0.1' }
   get DefaultUser() { return 'root' }
 
-  connect() {
-    this.connection = mysql.createConnection({
+  async connect() {
+    this.connection = await mysql.createConnection({
       host: this.settings.host || this.DefaultHost,
       password: this.settings.password || '',
       user: this.settings.user || this.DefaultUser,