108 lines
2.9 KiB
TypeScript
108 lines
2.9 KiB
TypeScript
import * as path from 'path'
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import * as Promise from 'bluebird'
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import { database as db } from './database'
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import { LAST_MIGRATION_VERSION } from './constants'
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import { logger, readdirPromise } from '../helpers'
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function migrate () {
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const p = db.sequelize.getQueryInterface().showAllTables()
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.then(tables => {
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// No tables, we don't need to migrate anything
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// The installer will do that
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if (tables.length === 0) throw null
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})
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.then(() => {
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return db.Application.loadMigrationVersion()
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})
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.then(actualVersion => {
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if (actualVersion === null) {
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return db.Application.create({ migrationVersion: 0 }).then(() => 0)
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}
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return actualVersion
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})
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.then(actualVersion => {
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// No need migrations, abort
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if (actualVersion >= LAST_MIGRATION_VERSION) throw null
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return actualVersion
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})
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.then(actualVersion => {
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// If there are a new migration scripts
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logger.info('Begin migrations.')
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return getMigrationScripts().then(migrationScripts => ({ actualVersion, migrationScripts }))
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})
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.then(({ actualVersion, migrationScripts }) => {
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return Promise.mapSeries(migrationScripts, entity => {
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return executeMigration(actualVersion, entity)
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})
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})
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.then(() => {
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logger.info('Migrations finished. New migration version schema: %s', LAST_MIGRATION_VERSION)
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})
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.catch(err => {
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if (err === null) return undefined
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throw err
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})
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return p
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}
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// ---------------------------------------------------------------------------
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export {
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migrate
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}
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// ---------------------------------------------------------------------------
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function getMigrationScripts () {
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return readdirPromise(path.join(__dirname, 'migrations')).then(files => {
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const filesToMigrate: {
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version: string,
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script: string
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}[] = []
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files.forEach(function (file) {
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// Filename is something like 'version-blabla.js'
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const version = file.split('-')[0]
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filesToMigrate.push({
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version,
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script: file
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})
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})
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return filesToMigrate
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})
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}
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function executeMigration (actualVersion: number, entity: { version: string, script: string }) {
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const versionScript = parseInt(entity.version, 10)
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// Do not execute old migration scripts
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if (versionScript <= actualVersion) return undefined
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// Load the migration module and run it
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const migrationScriptName = entity.script
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logger.info('Executing %s migration script.', migrationScriptName)
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const migrationScript = require(path.join(__dirname, 'migrations', migrationScriptName))
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return db.sequelize.transaction(t => {
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const options = {
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transaction: t,
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queryInterface: db.sequelize.getQueryInterface(),
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sequelize: db.sequelize
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}
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migrationScript.up(options)
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.then(() => {
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// Update the new migration version
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db.Application.updateMigrationVersion(versionScript, t)
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})
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})
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}
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