feat: export registry (#3842)

* feat: registry first iteration

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* feat: improve webpack auto export loader

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* chore: remove `compat` API

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* chore: cleanup

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

---------

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

js-packages/webpack-config/tests/autoExportLoader.test.js

@@ -0,0 +1,54 @@
+/**
+ * @jest-environment node
+ */
+import compiler from './compiler.js';
+import 'regenerator-runtime/runtime';
+
+const compile = async (path, useFinalOutput = false) => {
+  const stats = await compiler(path);
+  return useFinalOutput
+    ? stats.finalOutput
+    : stats.toJson({
+        source: true,
+      }).modules[0].source;
+};
+
+test('A directory with index.js that exports multiple modules adds the directory as a module', async () => {
+  let output = await compile('src/common/bars/index.js', true);
+  expect(output).toContain("flarum.reg.add('flarum-framework', 'common/bars', bars)");
+
+  output = await compile('src/common/bars/Acme.js');
+  expect(output).toContain("flarum.reg.add('flarum-framework', 'common/bars/Acme', Acme)");
+
+  output = await compile('src/common/bars/Foo.js');
+  expect(output).toContain("flarum.reg.add('flarum-framework', 'common/bars/Foo', Foo)");
+});
+
+test('Simple default exports are added', async () => {
+  const output = await compile('src/common/Test.js');
+  expect(output).toContain("flarum.reg.add('flarum-framework', 'common/Test', Test)");
+});
+
+test('Named exports are added', async () => {
+  const output = await compile('src/common/foos/namedExports.js');
+  expect(output).toContain(
+    "flarum.reg.add('flarum-framework', 'common/foos/namedExports', { baz: baz,foo: foo,Bar: Bar,sasha: sasha,flarum: flarum,david: david, })"
+  );
+});
+
+test('Export as default from another module is added', async () => {
+  const output = await compile('src/common/foos/exportDefaultFrom.js', true);
+  expect(output).toContain("flarum.reg.add('flarum-framework', 'common/foos/exportDefaultFrom', potato");
+});
+
+test('Export from other modules is added', async () => {
+  const output = await compile('src/common/foos/exportFrom.js', true);
+  expect(output).toContain("flarum.reg.add('flarum-framework', 'common/foos/exportFrom', { potato: potato,franz: franz, }");
+});
+
+test('Export from with other named exports works', async () => {
+  const output = await compile('src/common/foos/exportFromWithNamedExports.js', true);
+  expect(output).toContain(
+    "flarum.reg.add('flarum-framework', 'common/foos/exportFromWithNamedExports', { potato: potato,franz: franz,baz: baz,foo: foo,Bar: Bar,sasha: sasha,forum: forum,david: david, }"
+  );
+});

js-packages/webpack-config/tests/compiler.js

@@ -0,0 +1,48 @@
+import path from 'path';
+import webpack from 'webpack';
+import { createFsFromVolume, Volume } from 'memfs';
+import * as fs from 'fs';
+
+export default (fixture, options = {}) => {
+  const compiler = webpack({
+    context: __dirname,
+    entry: `./${fixture}`,
+    output: {
+      path: path.resolve(__dirname),
+      filename: 'bundle.js',
+    },
+    module: {
+      rules: [
+        {
+          test: /\.js$/,
+          use: {
+            loader: path.resolve(__dirname, '../src/autoExportLoader.cjs'),
+            options: {
+              ...options,
+              composerPath: '../../composer.json',
+            },
+          },
+        },
+      ],
+    },
+    optimization: {
+      minimize: false,
+      minimizer: [],
+    },
+  });
+
+  compiler.outputFileSystem = createFsFromVolume(new Volume());
+  compiler.outputFileSystem.join = path.join.bind(path);
+
+  return new Promise((resolve, reject) => {
+    compiler.run((err, stats) => {
+      if (err) reject(err);
+      if (stats.hasErrors()) reject(stats.toJson().errors);
+
+      const outputFilepath = path.join(compiler.options.output.path, compiler.options.output.filename);
+      stats.finalOutput = compiler.outputFileSystem.readFileSync(outputFilepath, 'utf-8');
+
+      resolve(stats);
+    });
+  });
+};

js-packages/webpack-config/tests/src/common/Test.js

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+export default class Test {}

js-packages/webpack-config/tests/src/common/bars/Acme.js

@@ -0,0 +1 @@
+export default class Acme {}

js-packages/webpack-config/tests/src/common/bars/Foo.js

@@ -0,0 +1 @@
+export default class Foo {}

js-packages/webpack-config/tests/src/common/bars/index.js

@@ -0,0 +1,9 @@
+import Acme from './Acme.js';
+import Foo from './Foo.js';
+
+const bars = {
+  Acme,
+  Foo,
+};
+
+export default bars;

js-packages/webpack-config/tests/src/common/foos/exportDefaultFrom.js

@@ -0,0 +1 @@
+export { potato as default } from '../support/potato.js';

js-packages/webpack-config/tests/src/common/foos/exportFrom.js

@@ -0,0 +1 @@
+export { potato, franz } from '../support/potato.js';

js-packages/webpack-config/tests/src/common/foos/exportFromWithNamedExports.js

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+export { potato, franz } from '../support/potato.js';
+
+export function baz() {}
+
+export function foo() {}
+
+export class Bar {}
+
+const sasha = 'camel';
+
+export { sasha };
+
+const forum = 'Flarum';
+const david = 'david';
+
+export { forum, david };

js-packages/webpack-config/tests/src/common/foos/namedExports.js

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+export function baz() {}
+
+export function foo() {}
+
+export class Bar {}
+
+const sasha = 'camel';
+
+export { sasha };
+
+const flarum = 'Flarum';
+const david = 'david';
+
+export { flarum, david };

js-packages/webpack-config/tests/src/common/support/potato.js

@@ -0,0 +1,4 @@
+const potato = 'potato';
+const franz = 'franz';
+
+export { potato, franz };