Add server config, move plugin file

server/actions/serveFile.js

@@ -7,7 +7,7 @@ const IndexPage = require("../components/IndexPage");
 const renderPage = require("../utils/renderPage");
 const getMetadata = require("../utils/getMetadata");
 const getFileContentType = require("../utils/getFileContentType");
-const unpkgRewrite = require("../utils/unpkgRewriteBabelPlugin");
+const unpkgRewrite = require("../plugins/unpkgRewrite");
 const getEntries = require("../utils/getEntries");
 
 /**

server/config.js

@@ -0,0 +1,6 @@
+exports.port = parseInt(process.env.PORT, 10) || 5000;
+
+exports.origin =
+  process.env.NODE_ENV === "production" || process.env.NODE_ENV === "test"
+    ? "https://unpkg.com"
+    : `http://localhost:${exports.port}`;

server/plugins/__tests__/.eslintrc

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

server/plugins/__tests__/unpkgRewrite-test.js

@@ -1,5 +1,5 @@
 const babel = require("babel-core");
-const unpkgRewrite = require("../unpkgRewriteBabelPlugin");
+const unpkgRewrite = require("../unpkgRewrite");
 
 const testCases = [
   {

server/plugins/unpkgRewrite.js

@@ -1,9 +1,11 @@
 const URL = require("whatwg-url");
 const warning = require("warning");
 
+const config = require("../config");
+
 const bareIdentifierFormat = /^((?:@[^\/]+\/)?[^\/]+)(\/.*)?$/;
 
-function unpkgRewriteBabelPlugin(dependencies = {}) {
+function unpkgRewrite(dependencies = {}) {
   return {
     inherits: require("babel-plugin-syntax-export-extensions"),
 
@@ -34,11 +36,13 @@ function unpkgRewriteBabelPlugin(dependencies = {}) {
 
           const version = dependencies[packageName] || "latest";
 
-          path.node.source.value = `https://unpkg.com/${packageName}@${version}${file}?module`;
+          path.node.source.value = `${
+            config.origin
+          }/${packageName}@${version}${file}?module`;
         }
       }
     }
   };
 }
 
-module.exports = unpkgRewriteBabelPlugin;
+module.exports = unpkgRewrite;