feat: lazy transpiling of seeder-/data-source-files

README.MD

@@ -49,18 +49,19 @@ The following commands are available in the terminal:
 - `typeorm-extension db:drop` to drop the database
 - `typeorm-extension seed` seed the database
 
-Alternatively, the full command path can be set in the package.json file to run it e.g. with ts-node.
-
 ```
 "scripts": {
   ...
-  "db:create": "ts-node ./node_modules/typeorm-extension/dist/cli/index.js db:create",
-  "db:drop": "ts-node ./node_modules/typeorm-extension/dist/cli/index.js db:drop",
-  "seed": "ts-node ./node_modules/typeorm-extension/dist/cli/index.js seed"
+  "db:create": "typeorm-extension db:create",
+  "db:drop": "typeorm-extension db:drop",
+  "seed": "typeorm-extension seed"
   ...
 }
 ```
 
+Ts-node is no longer needed due to the fact that TypeScript files are transpiled on the file as needed.
+The same applies to files from another module system (CJS / ESM) 🧙‍.
+
 > Read the [Seeding Configuration](#configuration) section to find out how to specify the path,
 > for the seeder- & factory-location.
 

package.json

@@ -20,7 +20,7 @@
         "build": "rm -rf ./dist && tsc",
         "build:watch": "npm run build -- --watch",
         "commit": "npx git-cz",
-        "test": "cross-env NODE_ENV=test jest --config ./test/jest.config.js",
+        "test": "jest --config ./test/jest.config.js",
         "test:coverage": "cross-env NODE_ENV=test jest --config ./test/jest.config.js --coverage",
         "lint": "eslint --ext .js,.vue,.ts ./src",
         "lint:fix": "npm run lint -- --fix",
@@ -48,7 +48,7 @@
     "license": "MIT",
     "dependencies": {
         "@faker-js/faker": "^7.6.0",
-        "locter": "^0.7.0",
+        "locter": "^1.0.3",
         "rapiq": "^0.6.3",
         "reflect-metadata": "^0.1.13",
         "yargs": "^17.6.2"

src/data-source/find/module.ts

@@ -1,6 +1,6 @@
 import {
-    loadScriptFileSync,
-    locateFile,
+    load,
+    locate,
     removeFileNameExtension,
 } from 'locter';
 import path from 'path';
@@ -77,13 +77,13 @@ export async function findDataSource(
     }
 
     for (let i = 0; i < fileNames.length; i++) {
-        const info = await locateFile(`${fileNames[i]}.{cjs,js,mjs,ts}`, {
+        const info = await locate(`${fileNames[i]}.{cjs,js,mjs,ts}`, {
             path: paths,
             ignore: ['**/*.d.ts'],
         });
 
         if (info) {
-            const fileExports = loadScriptFileSync(info);
+            const fileExports = await load(info);
             if (InstanceChecker.isDataSource(fileExports)) {
                 return fileExports;
             }

src/seeder/module.ts

@@ -1,8 +1,6 @@
 import { DataSource, DataSourceOptions } from 'typeorm';
-import {
-    loadScriptFileExportSync,
-    loadScriptFileSync,
-} from 'locter';
+import { load } from 'locter';
+import { hasOwnProperty } from '../utils';
 import { SeederConstructor, SeederOptions } from './type';
 import { resolveFilePaths, resolveFilePatterns, setDefaultSeederOptions } from './utils';
 import { modifyDataSourceOptionForRuntimeEnvironment, setDataSource } from '../data-source';
@@ -35,7 +33,7 @@ async function prepareSeeder(
             factoryFiles = resolveFilePaths(factoryFiles);
 
             for (let i = 0; i < factoryFiles.length; i++) {
-                loadScriptFileSync(factoryFiles[i]);
+                await load(factoryFiles[i]);
             }
         }
 
@@ -71,9 +69,13 @@ async function prepareSeeder(
             seedFiles = resolveFilePaths(seedFiles);
 
             for (let i = 0; i < seedFiles.length; i++) {
-                const fileExport = loadScriptFileExportSync(seedFiles[i]);
+                let fileExport = await load(seedFiles[i]);
+                if (hasOwnProperty(fileExport, 'default')) {
+                    fileExport = fileExport.default;
+                }
+
                 if (fileExport) {
-                    const item = fileExport.value as SeederConstructor;
+                    const item = fileExport as SeederConstructor;
 
                     if (!options.seedName || options.seedName === item.name) {
                         items.push(item);
@@ -99,6 +101,10 @@ export async function runSeeder(
     seeder: SeederConstructor,
     options?: SeederOptions,
 ) : Promise<unknown> {
+    if (hasOwnProperty(seeder, 'default')) {
+        seeder = seeder.default as SeederConstructor;
+    }
+
     options = options || {};
     options.seeds = [seeder];
     options.factoriesLoad = options.factoriesLoad ?? true;

src/seeder/utils/file-path.ts

@@ -1,12 +1,12 @@
 /* istanbul ignore next */
 import path from 'path';
-import { locateFiles } from 'locter';
+import { locateMany } from 'locter';
 
 export async function resolveFilePatterns(
     filesPattern: string[],
     root?: string,
 ) : Promise<string[]> {
-    return locateFiles(
+    return locateMany(
         filesPattern,
         {
             ...(root ? { path: root } : {}),