first commit

node_modules/acorn-dynamic-import/src/index.js

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+/* eslint-disable no-underscore-dangle */
+import { tokTypes as tt } from 'acorn';
+
+export const DynamicImportKey = 'Import';
+
+// NOTE: This allows `yield import()` to parse correctly.
+tt._import.startsExpr = true;
+
+function parseDynamicImport() {
+  const node = this.startNode();
+  this.next();
+  if (this.type !== tt.parenL) {
+    this.unexpected();
+  }
+  return this.finishNode(node, DynamicImportKey);
+}
+
+function parenAfter() {
+  return /^(\s|\/\/.*|\/\*[^]*?\*\/)*\(/.test(this.input.slice(this.pos));
+}
+
+export default function dynamicImport(Parser) {
+  return class extends Parser {
+    parseStatement(context, topLevel, exports) {
+      if (this.type === tt._import && parenAfter.call(this)) {
+        return this.parseExpressionStatement(this.startNode(), this.parseExpression());
+      }
+      return super.parseStatement(context, topLevel, exports);
+    }
+
+    parseExprAtom(refDestructuringErrors) {
+      if (this.type === tt._import) {
+        return parseDynamicImport.call(this);
+      }
+      return super.parseExprAtom(refDestructuringErrors);
+    }
+  };
+}

node_modules/acorn-dynamic-import/src/walk.js

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+import { DynamicImportKey } from './index';
+
+export default function inject(injectableWalk) {
+  return Object.assign({}, injectableWalk, {
+    base: Object.assign({}, injectableWalk.base, {
+      [DynamicImportKey]() {},
+    }),
+  });
+}