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1 | import { waterfall, eachSeries } from 'async' | |
2 | import fs = require('fs') | |
3 | import path = require('path') | |
4 | import * as Sequelize from 'sequelize' | |
5 | ||
6 | import { database as db } from './database' | |
7 | import { LAST_MIGRATION_VERSION } from './constants' | |
8 | import { logger } from '../helpers' | |
9 | import { ApplicationInstance } from '../models' | |
10 | ||
11 | function migrate (finalCallback) { | |
12 | waterfall([ | |
13 | ||
14 | function checkApplicationTableExists (callback) { | |
15 | db.sequelize.getQueryInterface().showAllTables().asCallback(function (err, tables) { | |
16 | if (err) return callback(err) | |
17 | ||
18 | // No tables, we don't need to migrate anything | |
19 | // The installer will do that | |
20 | if (tables.length === 0) return finalCallback(null) | |
21 | ||
22 | return callback(null) | |
23 | }) | |
24 | }, | |
25 | ||
26 | function loadMigrationVersion (callback) { | |
27 | db.Application.loadMigrationVersion(callback) | |
28 | }, | |
29 | ||
30 | function createMigrationRowIfNotExists (actualVersion, callback) { | |
31 | if (actualVersion === null) { | |
32 | db.Application.create({ | |
33 | migrationVersion: 0 | |
34 | }, function (err) { | |
35 | return callback(err, 0) | |
36 | }) | |
37 | } | |
38 | ||
39 | return callback(null, actualVersion) | |
40 | }, | |
41 | ||
42 | function abortMigrationIfNotNeeded (actualVersion, callback) { | |
43 | // No need migrations | |
44 | if (actualVersion >= LAST_MIGRATION_VERSION) return finalCallback(null) | |
45 | ||
46 | return callback(null, actualVersion) | |
47 | }, | |
48 | ||
49 | function getMigrations (actualVersion, callback) { | |
50 | // If there are a new migration scripts | |
51 | logger.info('Begin migrations.') | |
52 | ||
53 | getMigrationScripts(function (err, migrationScripts) { | |
54 | return callback(err, actualVersion, migrationScripts) | |
55 | }) | |
56 | }, | |
57 | ||
58 | function doMigrations (actualVersion, migrationScripts, callback) { | |
59 | eachSeries(migrationScripts, function (entity, callbackEach) { | |
60 | executeMigration(actualVersion, entity, callbackEach) | |
61 | }, function (err) { | |
62 | if (err) return callback(err) | |
63 | ||
64 | logger.info('Migrations finished. New migration version schema: %s', LAST_MIGRATION_VERSION) | |
65 | return callback(null) | |
66 | }) | |
67 | } | |
68 | ], finalCallback) | |
69 | } | |
70 | ||
71 | // --------------------------------------------------------------------------- | |
72 | ||
73 | export { | |
74 | migrate | |
75 | } | |
76 | ||
77 | // --------------------------------------------------------------------------- | |
78 | ||
79 | function getMigrationScripts (callback) { | |
80 | fs.readdir(path.join(__dirname, 'migrations'), function (err, files) { | |
81 | if (err) return callback(err) | |
82 | ||
83 | const filesToMigrate = [] | |
84 | ||
85 | files.forEach(function (file) { | |
86 | // Filename is something like 'version-blabla.js' | |
87 | const version = file.split('-')[0] | |
88 | filesToMigrate.push({ | |
89 | version, | |
90 | script: file | |
91 | }) | |
92 | }) | |
93 | ||
94 | return callback(err, filesToMigrate) | |
95 | }) | |
96 | } | |
97 | ||
98 | function executeMigration (actualVersion, entity, callback) { | |
99 | const versionScript = parseInt(entity.version, 10) | |
100 | ||
101 | // Do not execute old migration scripts | |
102 | if (versionScript <= actualVersion) return callback(null) | |
103 | ||
104 | // Load the migration module and run it | |
105 | const migrationScriptName = entity.script | |
106 | logger.info('Executing %s migration script.', migrationScriptName) | |
107 | ||
108 | const migrationScript = require(path.join(__dirname, 'migrations', migrationScriptName)) | |
109 | ||
110 | db.sequelize.transaction().asCallback(function (err, t) { | |
111 | if (err) return callback(err) | |
112 | ||
113 | const options = { | |
114 | transaction: t, | |
115 | queryInterface: db.sequelize.getQueryInterface(), | |
116 | sequelize: db.sequelize, | |
117 | Sequelize: Sequelize | |
118 | } | |
119 | migrationScript.up(options, function (err) { | |
120 | if (err) { | |
121 | t.rollback() | |
122 | return callback(err) | |
123 | } | |
124 | ||
125 | // Update the new migration version | |
126 | db.Application.updateMigrationVersion(versionScript, t, function (err) { | |
127 | if (err) { | |
128 | t.rollback() | |
129 | return callback(err) | |
130 | } | |
131 | ||
132 | t.commit().asCallback(callback) | |
133 | }) | |
134 | }) | |
135 | }) | |
136 | } |