Make plugin remove drupal library require statements

Author: christophersmith262

lib/DrupalLibrariesPlugin.js

@@ -2,7 +2,8 @@ const path = require('path'),
   YAML = require('yaml'),
   DrupalLibraryEntryGenerator = require('./DrupalLibraryEntryGenerator'),
   DrupalLibraryFile = require('./DrupalLibraryFile'),
-  DrupalLibraryMetadata = require('./DrupalLibraryMetadata')
+  DrupalLibraryMetadata = require('./DrupalLibraryMetadata'),
+  DrupalLibraryModule = require('./DrupalLibraryModule')
 
 /**
  * A webpack plugin for generating drupal libraries files.
@@ -49,7 +50,21 @@ class DrupalLibrariesPlugin {
    *   The webpack compiler.
    */
   apply(compiler) {
-    compiler.hooks.done.tapPromise('DrupalLibrariesPlugin ', async stats => {
+    // Prevents drupal library dependencies from being included.
+    compiler.hooks.normalModuleFactory.tap('DrupalLibrariesPlugin', cmf => {
+      cmf.hooks.factory.tap("DrupalLibrariesPlugin", factory => (data, callback) => {
+        const result = this.opts.requirePattern.exec(data.request)
+        if (result) {
+          callback(null, new DrupalLibraryModule(result[1]))
+        }
+        else {
+          factory(data, callback)
+        }
+      })
+    })
+
+    // Analyzes the final chunks to determine library dependencies.
+    compiler.hooks.done.tapPromise('DrupalLibrariesPlugin', async stats => {
       this.metadata = await this._generateLibraryMetadata(stats.compilation)
       this.result = await this._generateLibraries(this.metadata)
       this.files = await Promise.resolve(this.opts.path(this.result, this.metadata))

lib/DrupalLibraryModule.js

@@ -0,0 +1,38 @@
+const Module = require('webpack').Module,
+  RawSource = require('webpack-sources').RawSource
+
+/**
+ * A webpack module representing a Drupal library dependency.
+ */
+class DrupalLibraryModule extends Module {
+
+  constructor(name) {
+    super("", null)
+
+    this.name = name
+  }
+
+  identifier() {
+    return "drupal " + this.name
+  }
+
+  readableIdentifier() {
+    return "drupal " + this.name
+  }
+
+  needRebuild() {
+    false
+  }
+
+  build(options, compilation, resolver, fs, callback) {
+    this.build = true
+    this.buildMeta = {}
+    this.buildInfo = {}
+    callback()
+  }
+
+  source(dependencyTemplates) {
+    return new RawSource('')
+  }
+
+}