Merge in v5 code

scripts/build/transformers/plugin-class.ts

@@ -0,0 +1,64 @@
+import * as ts from 'typescript';
+import { convertValueToLiteral, getDecorator, getDecoratorArgs, getDecoratorName } from '../helpers';
+import { transformMembers } from './members';
+
+function transformClass(cls: any, ngcBuild?: boolean) {
+
+  console.time('~ transformClass: ' + cls.name.text);
+
+    const pluginStatics = [];
+    const dec: any = getDecorator(cls);
+
+    if (dec) {
+      const pluginDecoratorArgs = getDecoratorArgs(dec);
+
+      // add plugin decorator args as static properties of the plugin's class
+      for (let prop in pluginDecoratorArgs) {
+        pluginStatics.push(ts.createProperty(
+          undefined,
+          [ts.createToken(ts.SyntaxKind.StaticKeyword)],
+          ts.createIdentifier(prop),
+          undefined,
+          undefined,
+          convertValueToLiteral(pluginDecoratorArgs[prop])
+        ));
+      }
+    }
+
+    cls = ts.createClassDeclaration(
+      ngcBuild && cls.decorators && cls.decorators.length? cls.decorators.filter(d => getDecoratorName(d) === 'Injectable') : undefined, // remove Plugin and Injectable decorators
+      [ts.createToken(ts.SyntaxKind.ExportKeyword)],
+      cls.name,
+      cls.typeParameters,
+      cls.heritageClauses,
+      [
+        ...transformMembers(cls),
+        ...pluginStatics
+      ]
+    );
+
+    console.timeEnd('~ transformClass: ' + cls.name.text);
+    return cls;
+}
+
+function transformClasses(file: ts.SourceFile, ctx: ts.TransformationContext, ngcBuild?: boolean) {
+  // console.log('Transforming file: ' + file.fileName);
+  return ts.visitEachChild(file, node => {
+    if (node.kind !== ts.SyntaxKind.ClassDeclaration) {
+      return node;
+    }
+
+    return transformClass(node, ngcBuild);
+  }, ctx);
+}
+
+export function pluginClassTransformer(ngcBuild?: boolean): ts.TransformerFactory<ts.SourceFile> {
+  return (ctx: ts.TransformationContext) => {
+    return tsSourceFile => {
+      if (tsSourceFile.fileName.indexOf('src/plugins') > -1)
+        return transformClasses(tsSourceFile, ctx, ngcBuild);
+
+      return tsSourceFile;
+    }
+  };
+}