feat: add json schema for package.json with custom ngPackage property (#173)

See review discussions in #169

Author: dherges

README.md

@@ -65,8 +65,10 @@ Configuration is picked up from the cli `-p` parameter, then from the default lo
 
 To configure with `package.json`, put your ng-package configuration 
 in the `ngPackage` field:
+
 ```json
 {
+  "$schema": "./node_modules/ng-packagr/package.schema.json",
   "ngPackage": {
     "lib": {
       "entryFile": "public_api.ts"
@@ -75,6 +77,8 @@ in the `ngPackage` field:
 }
 ```
 
+Note: the JSON `$schema` reference enables JSON editing support (autocompletion) for the custom `ngPackage` property in an IDE like [VSCode](https://github.com/Microsoft/vscode).
+
 #### More Examples
 
 Nikolas LeBlanc has written a story on medium.com on [Building an Angular 4 Component Library with the Angular CLI and ng-packagr](https://medium.com/@ngl817/building-an-angular-4-component-library-with-the-angular-cli-and-ng-packagr-53b2ade0701e)

integration/samples/core/ng-package.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "../../../src/lib/ng-package.schema.json",
+  "$schema": "../../../src/ng-package.schema.json",
   "lib": {
     "entryFile": "public_api.ts",
     "externals": {

integration/samples/custom/ng-package.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "../../../src/lib/ng-package.schema.json",
+  "$schema": "../../../src/ng-package.schema.json",
   "lib": {
     "entryFile": "src/public_api.ts"
   }

integration/samples/externals/ng-package.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "../../../src/lib/ng-package.schema.json",
+  "$schema": "../../../src/ng-package.schema.json",
   "lib": {
     "entryFile": "public_api.ts"
   }

integration/samples/material/ng-package.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "../../../src/lib/ng-package.schema.json",
+  "$schema": "../../../src/ng-package.schema.json",
   "lib": {
     "entryFile": "public_api.ts"
   }

integration/samples/package-json/package.json

@@ -1,4 +1,5 @@
 {
+  "$schema": "../../../src/package.schema.json",
   "name": "@sample/package-json",
   "description": "A sample library with configuration in package.json",
   "version": "1.0.0-pre.0",
@@ -9,7 +10,6 @@
     "@angular/common": "^4.1.2"
   },
   "ngPackage": {
-    "$schema": "../../../src/lib/ng-package.schema.json",
     "lib": {
       "entryFile": "public_api.ts"
     }

integration/samples/typings/ng-package.json

@@ -1,3 +1,3 @@
 {
-  "$schema": "../../../src/lib/ng-package.schema.json"
+  "$schema": "../../../src/ng-package.schema.json"
 }

src/package.schema.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "http://json-schema.org/schema",
+  "allOf": [
+    { "$ref": "http://json.schemastore.org/package" },
+    {
+      "properties": {
+        "ngPackage": { "$ref": "./ng-package.schema.json" }
+      },
+      "required": []
+    }
+  ]
+}