feat(compartment-mapper): json support in bundler

Author: naugtur

packages/compartment-mapper/src/bundle-json.js

@@ -0,0 +1,18 @@
+export default {
+  runtime: '',
+  getBundlerKit({ index, record: { sourceText } }) {
+    return {
+      getFunctor: () => `\
+// === functors[${index}] ===
+${sourceText},
+`,
+      getCells: () => `\
+    { default: cell('default') }, 
+`,
+      getReexportsWiring: () => '',
+      getFunctorCall: () => `\
+  cells[${index}].default.set(functors[${index}]);
+`,
+    };
+  },
+};

packages/compartment-mapper/src/bundle.js

@@ -26,6 +26,7 @@ import { parseLocatedJson } from './json.js';
 
 import mjsSupport from './bundle-mjs.js';
 import cjsSupport from './bundle-cjs.js';
+import jsonSupport from './bundle-json.js';
 
 const textEncoder = new TextEncoder();
 
@@ -130,6 +131,7 @@ const sortedModules = (
 const implementationPerParser = {
   'pre-mjs-json': mjsSupport,
   'pre-cjs-json': cjsSupport,
+  json: jsonSupport,
 };
 
 function getRuntime(parser) {
@@ -141,13 +143,7 @@ function getRuntime(parser) {
 function getBundlerKitForModule(module) {
   const parser = module.parser;
   if (!implementationPerParser[parser]) {
-    const warning = `/*unknown parser:${parser}*/`;
-    // each item is a function to avoid creating more in-memory copies of the source text etc.
-    return {
-      getFunctor: () => `(()=>{${warning}})`,
-      getCells: `{${warning}}`,
-      getFunctorCall: warning,
-    };
+    throw Error(`unknown parser:${parser}`);
   }
   const getBundlerKit = implementationPerParser[parser].getBundlerKit;
   return getBundlerKit(module);

packages/compartment-mapper/src/parse-json.js

@@ -35,6 +35,7 @@ export const parseJson = async (
       imports,
       exports: freeze(['default']),
       execute: freeze(execute),
+      sourceText: source,
     }),
   };
 };

packages/compartment-mapper/test/fixtures-0/node_modules/bundle/main.js

@@ -49,8 +49,11 @@ const expectedLog = [
     fromMjs: 'foo',
     zzz: 1,
   },
+  'bundle',
 ];
 
+// If you're looking at this test hoping to modify it to see bundling results,
+// run `yarn dev:livebundle` instead
 test('bundles work', async t => {
   const bundle = await makeBundle(read, fixture);
   const log = [];