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1 | import * as path from 'path' | |
2 | import * as Promise from 'bluebird' | |
3 | ||
4 | import { database as db } from './database' | |
5 | import { LAST_MIGRATION_VERSION } from './constants' | |
6 | import { logger, readdirPromise } from '../helpers' | |
7 | ||
8 | function migrate () { | |
9 | const p = db.sequelize.getQueryInterface().showAllTables() | |
10 | .then(tables => { | |
11 | // No tables, we don't need to migrate anything | |
12 | // The installer will do that | |
13 | if (tables.length === 0) throw null | |
14 | }) | |
15 | .then(() => { | |
16 | return db.Application.loadMigrationVersion() | |
17 | }) | |
18 | .then(actualVersion => { | |
19 | if (actualVersion === null) { | |
20 | return db.Application.create({ migrationVersion: 0 }).then(() => 0) | |
21 | } | |
22 | ||
23 | return actualVersion | |
24 | }) | |
25 | .then(actualVersion => { | |
26 | // No need migrations, abort | |
27 | if (actualVersion >= LAST_MIGRATION_VERSION) throw null | |
28 | ||
29 | return actualVersion | |
30 | }) | |
31 | .then(actualVersion => { | |
32 | // If there are a new migration scripts | |
33 | logger.info('Begin migrations.') | |
34 | ||
35 | return getMigrationScripts().then(migrationScripts => ({ actualVersion, migrationScripts })) | |
36 | }) | |
37 | .then(({ actualVersion, migrationScripts }) => { | |
38 | return Promise.each(migrationScripts, entity => executeMigration(actualVersion, entity)) | |
39 | }) | |
40 | .then(() => { | |
41 | logger.info('Migrations finished. New migration version schema: %s', LAST_MIGRATION_VERSION) | |
42 | }) | |
43 | .catch(err => { | |
44 | if (err === null) return undefined | |
45 | ||
46 | throw err | |
47 | }) | |
48 | ||
49 | return p | |
50 | } | |
51 | ||
52 | // --------------------------------------------------------------------------- | |
53 | ||
54 | export { | |
55 | migrate | |
56 | } | |
57 | ||
58 | // --------------------------------------------------------------------------- | |
59 | ||
60 | function getMigrationScripts () { | |
61 | return readdirPromise(path.join(__dirname, 'migrations')).then(files => { | |
62 | const filesToMigrate: { | |
63 | version: string, | |
64 | script: string | |
65 | }[] = [] | |
66 | ||
67 | files.forEach(function (file) { | |
68 | // Filename is something like 'version-blabla.js' | |
69 | const version = file.split('-')[0] | |
70 | filesToMigrate.push({ | |
71 | version, | |
72 | script: file | |
73 | }) | |
74 | }) | |
75 | ||
76 | return filesToMigrate | |
77 | }) | |
78 | } | |
79 | ||
80 | function executeMigration (actualVersion: number, entity: { version: string, script: string }) { | |
81 | const versionScript = parseInt(entity.version, 10) | |
82 | ||
83 | // Do not execute old migration scripts | |
84 | if (versionScript <= actualVersion) return undefined | |
85 | ||
86 | // Load the migration module and run it | |
87 | const migrationScriptName = entity.script | |
88 | logger.info('Executing %s migration script.', migrationScriptName) | |
89 | ||
90 | const migrationScript = require(path.join(__dirname, 'migrations', migrationScriptName)) | |
91 | ||
92 | return db.sequelize.transaction(t => { | |
93 | const options = { | |
94 | transaction: t, | |
95 | queryInterface: db.sequelize.getQueryInterface(), | |
96 | sequelize: db.sequelize | |
97 | } | |
98 | ||
99 | migrationScript.up(options) | |
100 | .then(() => { | |
101 | // Update the new migration version | |
102 | db.Application.updateMigrationVersion(versionScript, t) | |
103 | }) | |
104 | }) | |
105 | } |