Rename server => modules

modules/plugins/__tests__/.eslintrc

@@ -0,0 +1,5 @@
+{
+  "env": {
+    "jest": true
+  }
+}

modules/plugins/__tests__/unpkgRewrite-test.js

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+const babel = require("babel-core");
+const unpkgRewrite = require("../unpkgRewrite");
+
+const testCases = [
+  {
+    before: "import React from 'react';",
+    after: "import React from 'https://unpkg.com/react@15.6.1?module';"
+  },
+  {
+    before: "import router from '@angular/router';",
+    after:
+      "import router from 'https://unpkg.com/@angular/router@4.3.5?module';"
+  },
+  {
+    before: "import map from 'lodash.map';",
+    after: "import map from 'https://unpkg.com/lodash.map@4.6.0?module';"
+  },
+  {
+    before: "import fs from 'pn/fs';",
+    after: "import fs from 'https://unpkg.com/pn@1.0.0/fs?module';"
+  },
+  {
+    before: "import cupcakes from './cupcakes';",
+    after: "import cupcakes from './cupcakes?module';"
+  },
+  {
+    before: "import shoelaces from '/shoelaces';",
+    after: "import shoelaces from '/shoelaces?module';"
+  },
+  {
+    before: "import something from '//something.com/whatevs';",
+    after: "import something from '//something.com/whatevs';"
+  },
+  {
+    before: "import something from 'http://something.com/whatevs';",
+    after: "import something from 'http://something.com/whatevs';"
+  },
+  {
+    before: "let ReactDOM = require('react-dom');",
+    after: "let ReactDOM = require('react-dom');"
+  },
+  {
+    before: "export React from 'react';",
+    after: "export React from 'https://unpkg.com/react@15.6.1?module';"
+  },
+  {
+    before: "export { Component } from 'react';",
+    after: "export { Component } from 'https://unpkg.com/react@15.6.1?module';"
+  },
+  {
+    before: "export * from 'react';",
+    after: "export * from 'https://unpkg.com/react@15.6.1?module';"
+  },
+  {
+    before: "export var message = 'hello';",
+    after: "export var message = 'hello';"
+  }
+];
+
+const dependencies = {
+  react: "15.6.1",
+  "@angular/router": "4.3.5",
+  "lodash.map": "4.6.0",
+  pn: "1.0.0"
+};
+
+describe("Rewriting imports/exports", () => {
+  testCases.forEach(testCase => {
+    it(`successfully rewrites "${testCase.before}"`, () => {
+      const result = babel.transform(testCase.before, {
+        plugins: [unpkgRewrite(dependencies)]
+      });
+
+      expect(result.code).toEqual(testCase.after);
+    });
+  });
+});

modules/plugins/unpkgRewrite.js

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+const URL = require("whatwg-url");
+const warning = require("warning");
+
+const origin = require("../serverConfig").origin;
+
+const bareIdentifierFormat = /^((?:@[^/]+\/)?[^/]+)(\/.*)?$/;
+
+function unpkgRewrite(dependencies = {}) {
+  return {
+    inherits: require("babel-plugin-syntax-export-extensions"),
+
+    visitor: {
+      "ImportDeclaration|ExportNamedDeclaration|ExportAllDeclaration"(path) {
+        if (!path.node.source) return; // probably a variable declaration
+
+        if (
+          URL.parseURL(path.node.source.value) != null ||
+          path.node.source.value.substr(0, 2) === "//"
+        )
+          return; // valid URL or URL w/o protocol, leave it alone
+
+        if ([".", "/"].indexOf(path.node.source.value.charAt(0)) >= 0) {
+          // local path
+          path.node.source.value = `${path.node.source.value}?module`;
+        } else {
+          // "bare" identifier
+          const match = bareIdentifierFormat.exec(path.node.source.value);
+          const packageName = match[1];
+          const file = match[2] || "";
+
+          warning(
+            dependencies[packageName],
+            'Missing version info for package "%s" in dependencies; falling back to "latest"',
+            packageName
+          );
+
+          const version = dependencies[packageName] || "latest";
+          const url = `${origin}/${packageName}@${version}${file}?module`;
+
+          path.node.source.value = url;
+        }
+      }
+    }
+  };
+}
+
+module.exports = unpkgRewrite;