refactor(@angular-devkit/schematics): provide schematic collection description to FileSystemEngineHost resolver

The `_resolveReferenceString` abstract method of the `FileSystemEngineHostBase` class now has a third parameter
that provides the collection description of the schematic currently being resolved. This allows the resolver to
use any fields/options present within the collection description to adjust the resolution of the schematic. The
`encapsulation` optional field is also added to the `FileSystemCollectionDescription` type which will in the future
allow control of the `@angular/cli` VM context wrapping on an individual schematic collection basis.

Author: clydin

goldens/public-api/angular_devkit/schematics/tools/index.md

@@ -59,6 +59,8 @@ export type FileSystemCollectionDesc = CollectionDescription<FileSystemCollectio
 
 // @public (undocumented)
 export interface FileSystemCollectionDescription {
+    // (undocumented)
+    readonly encapsulation?: boolean;
     // (undocumented)
     readonly name: string;
     // (undocumented)
@@ -121,7 +123,7 @@ export abstract class FileSystemEngineHostBase implements FileSystemEngineHost_2
     // (undocumented)
     protected abstract _resolveCollectionPath(name: string, requester?: string): string;
     // (undocumented)
-    protected abstract _resolveReferenceString(name: string, parentPath: string): {
+    protected abstract _resolveReferenceString(name: string, parentPath: string, collectionDescription: FileSystemCollectionDesc): {
         ref: RuleFactory<{}>;
         path: string;
     } | null;
@@ -183,7 +185,7 @@ export class NodeModulesEngineHost extends FileSystemEngineHostBase {
     // (undocumented)
     protected _resolveCollectionPath(name: string, requester?: string): string;
     // (undocumented)
-    protected _resolveReferenceString(refString: string, parentPath: string): {
+    protected _resolveReferenceString(refString: string, parentPath: string, collectionDescription?: FileSystemCollectionDesc): {
         ref: RuleFactory<{}>;
         path: string;
     } | null;

packages/angular_devkit/schematics/tools/description.ts

@@ -23,6 +23,7 @@ export interface FileSystemCollectionDescription {
   readonly path: string;
   readonly version?: string;
   readonly schematics: { [name: string]: FileSystemSchematicDesc };
+  readonly encapsulation?: boolean;
 }
 
 export interface FileSystemSchematicJsonDescription {
@@ -63,7 +64,8 @@ export declare type FileSystemSchematic = Schematic<
   FileSystemCollectionDescription,
   FileSystemSchematicDescription
 >;
-export declare type FileSystemCollectionDesc = CollectionDescription<FileSystemCollectionDescription>;
+export declare type FileSystemCollectionDesc =
+  CollectionDescription<FileSystemCollectionDescription>;
 export declare type FileSystemSchematicDesc = SchematicDescription<
   FileSystemCollectionDescription,
   FileSystemSchematicDescription

packages/angular_devkit/schematics/tools/file-system-engine-host-base.ts

@@ -102,6 +102,7 @@ export abstract class FileSystemEngineHostBase implements FileSystemEngineHost {
   protected abstract _resolveReferenceString(
     name: string,
     parentPath: string,
+    collectionDescription: FileSystemCollectionDesc,
   ): { ref: RuleFactory<{}>; path: string } | null;
   protected abstract _transformCollectionDescription(
     name: string,
@@ -234,7 +235,11 @@ export abstract class FileSystemEngineHostBase implements FileSystemEngineHost {
     if (!partialDesc.factory) {
       throw new SchematicMissingFactoryException(name);
     }
-    const resolvedRef = this._resolveReferenceString(partialDesc.factory, collectionPath);
+    const resolvedRef = this._resolveReferenceString(
+      partialDesc.factory,
+      collectionPath,
+      collection,
+    );
     if (!resolvedRef) {
       throw new FactoryCannotBeResolvedException(name);
     }

packages/angular_devkit/schematics/tools/node-module-engine-host.ts

@@ -98,7 +98,11 @@ export class NodeModulesEngineHost extends FileSystemEngineHostBase {
     return collectionPath;
   }
 
-  protected _resolveReferenceString(refString: string, parentPath: string) {
+  protected _resolveReferenceString(
+    refString: string,
+    parentPath: string,
+    collectionDescription?: FileSystemCollectionDesc,
+  ) {
     const ref = new ExportStringRef<RuleFactory<{}>>(refString, parentPath);
     if (!ref.ref) {
       return null;