Merge pull request #7 from Updater/tcrescenzi/allow-deps-too

feat(includeDependencies): add option to also externalize all dependencies

Author: trescenzi

README.md

@@ -2,6 +2,7 @@
 
 # Rollup Plugin Peer Deps External
 Automatically externalize `peerDependencies` in a `rollup` bundle.
+Also optionally externalize `dependencies` in a `rollup` bundle.
 
 ## Motivation
 When bundling a library using [`rollup`](https://github.com/rollup/rollup), we generally want to keep from including  [`peerDependencies`](https://nodejs.org/en/blog/npm/peer-dependencies/) since they are expected to be  provided by the consumer of the library. By excluding these dependencies, we keep bundle size down and avoid bundling duplicate dependencies.
@@ -47,3 +48,20 @@ export default {
   ],
 }
 ```
+
+### includeDependencies
+Sometimes it's necessary to include a package as a direct dependency instead of a peer dependency. This can happen if your package has a very specific requirement on the dependency and cannot accecpt another version. In this case set `includeDependencies` to `true` and all of your packages dependencies will also be included as externals
+
+```javascript
+// Add to plugins array in rollup.config.js
+import peerDepsExternal from 'rollup-plugin-peer-deps-external';
+
+export default {
+  plugins: [
+    // Preferably set as first plugin.
+    peerDepsExternal({
+      includeDependencies: true,
+    }),
+  ],
+}
+```

src/get-deps.js

@@ -0,0 +1,10 @@
+const { resolve } = require('path');
+
+export default function getDeps(path = resolve(process.cwd(), 'package.json'), type = 'peerDependencies') {
+  try {
+    const pkg = require(path);
+    return Object.keys(pkg[type]);
+  } catch (err) {
+    return [];
+  }
+}

src/get-peer-deps.js

@@ -1,17 +1,19 @@
 import { either, pipe } from 'ramda';
 import externalToFn from './external-to-fn';
 import getModulesMatcher from './get-modules-matcher';
-import getPeerDeps from './get-peer-deps';
+import getDeps from './get-deps';
 
-export default function PeerDepsExternalPlugin({packageJsonPath} = {}) {
+export default function PeerDepsExternalPlugin({packageJsonPath, includeDependencies} = {}) {
   return {
     name: 'peer-deps-external',
     options: opts => {
       opts.external = either(
         // Retain existing `external` config
         externalToFn(opts.external),
         // Add `peerDependencies` to `external` config
-        getModulesMatcher(getPeerDeps(packageJsonPath))
+        getModulesMatcher(
+          getDeps(packageJsonPath, 'peerDependencies')
+          .concat(includeDependencies ? getDeps(packageJsonPath, 'dependencies') : []))
       );
 
       return opts;