flow like the river

BACK_BACK/node_modules/parcel-bundler/lib/assets/KotlinAsset.js

@@ -0,0 +1,65 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));
+
+const Asset = require('../Asset');
+
+const localRequire = require('../utils/localRequire');
+
+const path = require('path');
+
+const fs = require('@parcel/fs');
+
+const os = require('os');
+
+class KotlinAsset extends Asset {
+  constructor(name, options) {
+    super(name, options);
+    this.type = 'js';
+  }
+
+  generate() {
+    var _this = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      // require kotlin
+      const kotlinCompiler = yield localRequire('@jetbrains/kotlinc-js-api', _this.name);
+      let id = Math.random().toString(36).slice(3);
+      let dir = path.join(os.tmpdir(), id);
+      let filename = path.join(dir, id + '.js');
+      yield fs.mkdirp(dir);
+      yield kotlinCompiler.compile({
+        output: filename,
+        sources: [_this.name],
+        moduleKind: 'commonjs',
+        noStdlib: false,
+        metaInfo: true,
+        sourceMaps: _this.options.sourceMaps
+      });
+      let source = yield fs.readFile(filename, 'utf8');
+      let sourceMap;
+
+      if (_this.options.sourceMaps) {
+        sourceMap = yield fs.readFile(filename + '.map', 'utf8');
+        sourceMap = JSON.parse(sourceMap);
+        sourceMap.sources = [_this.relativeName];
+        sourceMap.sourcesContent = [_this.contents]; // remove source map url
+
+        source = source.substring(0, source.lastIndexOf('//# sourceMappingURL'));
+      } // delete temp directory
+
+
+      yield fs.rimraf(dir);
+      return [{
+        type: 'js',
+        value: source,
+        sourceMap
+      }];
+    })();
+  }
+
+}
+
+module.exports = KotlinAsset;