From d8180efc4b020d61b026c2fd04233b1396b09dd8 Mon Sep 17 00:00:00 2001
From: Raymond Feng <enjoyjava@gmail.com>
Date: Tue, 25 Sep 2018 20:27:41 -0700
Subject: [PATCH] feat(boot): bind content of package.json to app context

---
 packages/boot/src/mixins/boot.mixin.ts        |  7 +++++++
 .../controller.booter.acceptance.ts           | 12 ++++++++++++
 packages/boot/test/fixtures/package.json      | 19 +++++++++++++++++++
 packages/core/src/application.ts              | 15 +++++++++++++++
 packages/core/src/keys.ts                     |  9 ++++++++-
 5 files changed, 61 insertions(+), 1 deletion(-)
 create mode 100644 packages/boot/test/fixtures/package.json

diff --git a/packages/boot/src/mixins/boot.mixin.ts b/packages/boot/src/mixins/boot.mixin.ts
index 0ce2171442b2..f36f1900235a 100644
--- a/packages/boot/src/mixins/boot.mixin.ts
+++ b/packages/boot/src/mixins/boot.mixin.ts
@@ -8,6 +8,8 @@ import {Booter, BootOptions, Bootable} from '../interfaces';
 import {BootComponent} from '../boot.component';
 import {Bootstrapper} from '../bootstrapper';
 import {BootBindings} from '../keys';
+import {CoreBindings} from '@loopback/core';
+import * as path from 'path';
 
 // Binding is re-exported as Binding / Booter types are needed when consuming
 // BootMixin and this allows a user to import them from the same package (UX!)
@@ -53,6 +55,11 @@ export function BootMixin<T extends Constructor<any>>(superClass: T) {
       this.bind(BootBindings.BOOT_OPTIONS).toDynamicValue(
         () => this.bootOptions,
       );
+
+      this.bind(CoreBindings.APPLICATION_PACKAGE_JSON).toDynamicValue(() => {
+        const pkgFile = path.resolve(this.projectRoot, 'package.json');
+        return require(pkgFile);
+      });
     }
 
     /**
diff --git a/packages/boot/test/acceptance/controller.booter.acceptance.ts b/packages/boot/test/acceptance/controller.booter.acceptance.ts
index 05508dc1bd4c..3b4970e755bd 100644
--- a/packages/boot/test/acceptance/controller.booter.acceptance.ts
+++ b/packages/boot/test/acceptance/controller.booter.acceptance.ts
@@ -7,9 +7,11 @@ import {
   createRestAppClient,
   givenHttpServerConfig,
   TestSandbox,
+  expect,
 } from '@loopback/testlab';
 import {resolve} from 'path';
 import {BooterApp} from '../fixtures/application';
+import {CoreBindings} from '@loopback/core';
 
 describe('controller booter acceptance tests', () => {
   let app: BooterApp;
@@ -21,6 +23,15 @@ describe('controller booter acceptance tests', () => {
 
   afterEach(stopApp);
 
+  it('binds package.json', async () => {
+    const pkg = await app.get(CoreBindings.APPLICATION_PACKAGE_JSON);
+    expect(pkg).containEql({
+      name: 'boot-test-app',
+      version: '1.0.0',
+      description: 'boot-test-app',
+    });
+  });
+
   it('binds controllers using ControllerDefaults and REST endpoints work', async () => {
     await app.boot();
     await app.start();
@@ -33,6 +44,7 @@ describe('controller booter acceptance tests', () => {
   });
 
   async function getApp() {
+    await sandbox.copyFile(resolve(__dirname, '../fixtures/package.json'));
     await sandbox.copyFile(resolve(__dirname, '../fixtures/application.js'));
     await sandbox.copyFile(
       resolve(__dirname, '../fixtures/multiple.artifact.js'),
diff --git a/packages/boot/test/fixtures/package.json b/packages/boot/test/fixtures/package.json
new file mode 100644
index 000000000000..e827db359b36
--- /dev/null
+++ b/packages/boot/test/fixtures/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "boot-test-app",
+  "version": "1.0.0",
+  "description": "boot-test-app",
+  "keywords": [
+    "loopback-application",
+    "loopback"
+  ],
+  "engines": {
+    "node": ">=8.9"
+  },
+  "scripts": {
+  },
+  "repository": {
+    "type": "git"
+  },
+  "author": "",
+  "license": ""
+}
diff --git a/packages/core/src/application.ts b/packages/core/src/application.ts
index a94596ae36bf..9e0ad9b0ba54 100644
--- a/packages/core/src/application.ts
+++ b/packages/core/src/application.ts
@@ -192,6 +192,10 @@ export class Application extends Context {
     const instance = this.getSync<Component>(componentKey);
     mountComponent(this, instance);
   }
+
+  public packageJson(pkg: PackageJson) {
+    this.bind(CoreBindings.APPLICATION_PACKAGE_JSON).to(pkg);
+  }
 }
 
 /**
@@ -207,3 +211,14 @@ export interface ApplicationConfig {
 
 // tslint:disable-next-line:no-any
 export type ControllerClass = Constructor<any>;
+
+/**
+ * Type description for `package.json`
+ */
+export interface PackageJson {
+  name: string;
+  version: string;
+  description: string;
+  // tslint:disable-next-line:no-any
+  [name: string]: any;
+}
diff --git a/packages/core/src/keys.ts b/packages/core/src/keys.ts
index 3050150bdefe..4e3a92bc5d37 100644
--- a/packages/core/src/keys.ts
+++ b/packages/core/src/keys.ts
@@ -4,7 +4,7 @@
 // License text available at https://opensource.org/licenses/MIT
 
 import {BindingKey} from '@loopback/context';
-import {Application, ControllerClass} from './application';
+import {Application, ControllerClass, PackageJson} from './application';
 
 /**
  * Namespace for core binding keys
@@ -25,6 +25,13 @@ export namespace CoreBindings {
     'application.config',
   );
 
+  /**
+   * Binding key for the content of `package.json`
+   */
+  export const APPLICATION_PACKAGE_JSON = BindingKey.create<PackageJson>(
+    'application.package-json',
+  );
+
   // server
   /**
    * Binding key for servers