feat: added support for ESM config files

.babelrc

@@ -10,5 +10,13 @@
   ],
   "ignore": [
     "src/assets"
-  ]
+  ],
+  "overrides": [{
+    "test": "./src/helpers/import-helper.js",
+    "presets": [
+      ["@babel/env", {
+        "exclude": ["proposal-dynamic-import"],
+      }]
+    ],
+  }]
 }

package.json

@@ -38,6 +38,7 @@
     "pg": "latest",
     "pg-hstore": "latest",
     "prettier": "^2.4.1",
+    "semver": "^7.3.5",
     "sequelize": "^6.9.0",
     "sqlite3": "latest",
     "through2": "^4.0.2"

src/helpers/config-helper.js

@@ -5,6 +5,7 @@ import _ from 'lodash';
 import { promisify } from 'util';
 import helpers from './index';
 import getYArgs from '../core/yargs';
+import importHelper from './import-helper';
 
 const args = getYArgs().argv;
 
@@ -15,18 +16,19 @@ const api = {
   init() {
     return Promise.resolve()
       .then(() => {
-        let config;
-
         if (args.url) {
-          config = api.parseDbUrl(args.url);
+          return api.parseDbUrl(args.url);
         } else {
-          try {
-            config = require(api.getConfigFile());
-          } catch (e) {
-            api.error = e;
-          }
+          return importHelper.importModule(api.getConfigFile());
+        }
+      })
+      .then((module) => module.default)
+      .catch(() => {
+        try {
+          return require(api.getConfigFile());
+        } catch (e) {
+          api.error = e;
         }
-        return config;
       })
       .then((config) => {
         if (typeof config === 'object' || config === undefined) {

src/helpers/import-helper.js

@@ -0,0 +1,5 @@
+module.exports = {
+  importModule: function (module) {
+    return import(module);
+  },
+};

test/db/migrate.test.js

@@ -3,6 +3,7 @@ const expect = require('expect.js');
 const Support = require(__dirname + '/../support');
 const helpers = require(__dirname + '/../support/helpers');
 const gulp = require('gulp');
+const semver = require('semver');
 const _ = require('lodash');
 
 [
@@ -293,6 +294,54 @@ describe(Support.getTestDialectTeaser('db:migrate'), () => {
   });
 });
 
+describeOnlyForESM(Support.getTestDialectTeaser('db:migrate'), () => {
+  describe('with config.mjs', () => {
+    const prepare = function (callback) {
+      const config = helpers.getTestConfig();
+      const configContent = 'export default ' + JSON.stringify(config);
+      let result = '';
+
+      return gulp
+        .src(Support.resolveSupportPath('tmp'))
+        .pipe(helpers.clearDirectory())
+        .pipe(helpers.runCli('init'))
+        .pipe(helpers.removeFile('config/config.json'))
+        .pipe(helpers.copyMigration('createPerson.js'))
+        .pipe(helpers.overwriteFile(configContent, 'config/config.mjs'))
+        .pipe(helpers.runCli('db:migrate --config config/config.mjs'))
+        .on('error', (e) => {
+          callback(e);
+        })
+        .on('data', (data) => {
+          result += data.toString();
+        })
+        .on('end', () => {
+          callback(null, result);
+        });
+    };
+
+    it('creates a SequelizeMeta table', function (done) {
+      prepare(() => {
+        helpers.readTables(this.sequelize, (tables) => {
+          expect(tables).to.have.length(2);
+          expect(tables).to.contain('SequelizeMeta');
+          done();
+        });
+      });
+    });
+
+    it('creates the respective table', function (done) {
+      prepare(() => {
+        helpers.readTables(this.sequelize, (tables) => {
+          expect(tables).to.have.length(2);
+          expect(tables).to.contain('Person');
+          done();
+        });
+      });
+    });
+  });
+});
+
 describe(Support.getTestDialectTeaser('db:migrate'), () => {
   describe('with config.json and url option', () => {
     const prepare = function (callback) {
@@ -525,3 +574,11 @@ describe(Support.getTestDialectTeaser('db:migrate'), () => {
     });
   });
 });
+
+function describeOnlyForESM(title, fn) {
+  if (semver.satisfies(process.version, '^12.20.0 || ^14.13.1 || >=16.0.0')) {
+    describe(title, fn);
+  } else {
+    describe.skip(title, fn);
+  }
+}