107 lines
3.0 KiB
JavaScript
107 lines
3.0 KiB
JavaScript
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const fs = require('fs');
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const path = require('path');
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const { promisify } = require('util');
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const mkdirp = require('mkdirp');
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const { writeJsFileUsingTemplate } = require('../util/template');
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const { getMergedConfig } = require('./configuration-merger');
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class MigrationGenerator {
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constructor(migrationConfig) {
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this.config = getMergedConfig(migrationConfig);
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}
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// Creates a new migration, with a given name.
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async make(name, config) {
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this.config = getMergedConfig(config, this.config);
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if (!name) {
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return Promise.reject(
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new Error('A name must be specified for the generated migration')
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);
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}
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await this._ensureFolder();
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const createdMigrationFilePath = await this._writeNewMigration(name);
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return createdMigrationFilePath;
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}
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// Ensures a folder for the migrations exist, dependent on the migration
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// config settings.
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_ensureFolder() {
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const dirs = this._absoluteConfigDirs();
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const promises = dirs.map((dir) => {
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return promisify(fs.stat)(dir).catch(() => promisify(mkdirp)(dir));
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});
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return Promise.all(promises);
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}
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_getStubPath() {
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return (
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this.config.stub ||
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path.join(__dirname, 'stub', this.config.extension + '.stub')
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);
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}
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_getNewMigrationName(name) {
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if (name[0] === '-') name = name.slice(1);
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return yyyymmddhhmmss() + '_' + name + '.' + this.config.extension;
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}
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_getNewMigrationPath(name) {
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const fileName = this._getNewMigrationName(name);
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const dirs = this._absoluteConfigDirs();
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const dir = dirs.slice(-1)[0]; // Get last specified directory
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return path.join(dir, fileName);
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}
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// Write a new migration to disk, using the config and generated filename,
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// passing any `variables` given in the config to the template.
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async _writeNewMigration(name) {
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const migrationPath = this._getNewMigrationPath(name);
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await writeJsFileUsingTemplate(
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migrationPath,
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this._getStubPath(),
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{ variable: 'd' },
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this.config.variables || {}
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);
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return migrationPath;
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}
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_absoluteConfigDirs() {
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const directories = Array.isArray(this.config.directory)
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? this.config.directory
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: [this.config.directory];
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return directories.map((directory) => {
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if (!directory) {
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// eslint-disable-next-line no-console
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console.warn(
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'Failed to resolve config file, knex cannot determine where to generate migrations'
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);
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}
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return path.resolve(process.cwd(), directory);
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});
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}
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}
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// Ensure that we have 2 places for each of the date segments.
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function padDate(segment) {
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segment = segment.toString();
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return segment[1] ? segment : `0${segment}`;
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}
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// Get a date object in the correct format, without requiring a full out library
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// like "moment.js".
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function yyyymmddhhmmss() {
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const d = new Date();
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return (
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d.getFullYear().toString() +
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padDate(d.getMonth() + 1) +
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padDate(d.getDate()) +
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padDate(d.getHours()) +
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padDate(d.getMinutes()) +
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padDate(d.getSeconds())
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);
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}
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module.exports = MigrationGenerator;
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