feat(build): add eslint scripts and default configs

.eslintignore

@@ -0,0 +1,5 @@
+node_modules/
+dist/
+coverage/
+api-docs/
+/sandbox

.eslintrc.js

@@ -0,0 +1,3 @@
+module.exports = {
+  extends: ['./packages/eslint-config/eslintrc.js'],
+};

.travis.yml

@@ -27,7 +27,7 @@ matrix:
       env: TASK=code-lint
       # Running Code Linter -- Requires @loopback/build so it's bootstrapped
       script:
-        - lerna bootstrap --scope @loopback/build --scope @loopback/tslint-config
+        - lerna bootstrap --scope @loopback/build --scope @loopback/tslint-config --scope @loopback/eslint-config
         - npm run lint
     - node_js: "8"
       os: linux

CODEOWNERS

@@ -15,6 +15,7 @@ packages/http-server/* @hacksparrow @bajtos
 packages/cli/* @raymondfeng @bajtos
 packages/context/* @bajtos @raymondfeng
 packages/core/* @bajtos @raymondfeng
+packages/eslint-config/* @raymondfeng
 packages/metadata/* @raymondfeng
 packages/openapi-spec-builder/* @bajtos @raymondfeng
 packages/openapi-v3/* @bajtos @jannyHou

bin/check-package-locks.js

@@ -15,6 +15,7 @@ const fs = require('fs');
 const promisify = require('util').promisify;
 
 const readFile = promisify(fs.readFile);
+const exists = promisify(fs.exists);
 
 const Project = require('@lerna/project');
 
@@ -58,6 +59,8 @@ if (require.main === module) {
 }
 
 async function checkLockFile(lockFile) {
+  const found = await exists(lockFile);
+  if (!found) return [];
   const data = JSON.parse(await readFile(lockFile, 'utf-8'));
   return Object.keys(data.dependencies || []).filter(dep =>
     dep.startsWith('@loopback/'),

docs/site/MONOREPO.md

@@ -15,6 +15,7 @@ The [loopback-next](https://github.com/strongloop/loopback-next) repository uses
 | [context](https://github.com/strongloop/loopback-next/tree/master/packages/context)                                 | @loopback/context                     | Facilities to manage artifacts and their dependencies in your Node.js applications. The module exposes TypeScript/JavaScript APIs and decorators to register artifacts, declare dependencies, and resolve artifacts by keys. It also serves as an IoC container to support dependency injection. |
 | [core](https://github.com/strongloop/loopback-next/tree/master/packages/core)                                       | @loopback/core                        | Define and implement core constructs such as Application and Component                                                                                                                                                                                                                           |
 | [docs](https://github.com/strongloop/loopback-next/tree/master/docs)                                                | @loopback/docs                        | Documentation files rendered at [https://loopback.io](https://loopback.io)                                                                                                                                                                                                                       |
+| [eslint-config](https://github.com/strongloop/loopback-next/tree/master/packages/eslint-config)                     | @loopback/eslint-config               | ESLint configuration for LoopBack projects                                                                                                                                                                                                                                                       |
 | [example-express-composition](https://github.com/strongloop/loopback-next/tree/master/examples/express-composition) | @loopback/example-express-composition | A simple Express application that uses LoopBack 4 REST API                                                                                                                                                                                                                                       |
 | [example-greeter-extension](https://github.com/strongloop/loopback-next/tree/master/examples/greeter-extension)     | @loopback/example-greeter-extension   | An example showing how to implement the extension point/extension pattern using LoopBack 4                                                                                                                                                                                                       |
 | [example-hello-world](https://github.com/strongloop/loopback-next/tree/master/examples/hello-world)                 | @loopback/example-hello-world         | A simple hello-world application using LoopBack 4                                                                                                                                                                                                                                                |

greenkeeper.json

@@ -21,6 +21,7 @@
         "packages/cli/package.json",
         "packages/context/package.json",
         "packages/core/package.json",
+        "packages/eslint-config/package.json",
         "packages/http-caching-proxy/package.json",
         "packages/http-server/package.json",
         "packages/metadata/package.json",