[*] Add basic babel toolchain

Summary:
Adds babel to K2
Creates a simple build script so it'll run on prod.

Test Plan: manual

Reviewers: jackie, halla, juan

Reviewed By: juan

Differential Revision: https://phab.nylas.com/D3527

.babelrc

@@ -0,0 +1,6 @@
+{
+  "presets": [
+    "electron"
+  ],
+  "sourceMaps": "inline"
+}

.gitignore

@@ -1,3 +1,5 @@
+n1_cloud_dist
+
 *.swp
 *~
 .DS_Store

Dockerfile

@@ -17,6 +17,9 @@ RUN npm install --production
 # to run this separately from npm postinstall due to permission issues.
 RUN node_modules/.bin/lerna bootstrap
 
+# This uses babel to compile any es6 to stock js for plain node
+RUN npm run build-n1-cloud
+
 # External services run on port 80. Expose it.
 EXPOSE 5100
 

package.json

@@ -4,6 +4,11 @@
   "description": "The local sync engine for Nylas N1",
   "main": "",
   "dependencies": {
+    "babel-cli": "6.18.0",
+    "babel-core": "6.20.0",
+    "babel-preset-electron": "^0.37.8",
+    "fs-extra": "1.0.0",
+    "glob": "7.1.1",
     "lerna": "2.0.0-beta.30",
     "pm2": "^1.1.3"
   },
@@ -19,6 +24,7 @@
   "scripts": {
     "start": "pm2 stop all; pm2 delete all; pm2 start ./pm2-dev.yml --no-daemon",
     "stop": "pm2 stop all; pm2 delete all",
+    "build-n1-cloud": "node scripts/build-n1-cloud.js",
     "restart": "pm2 restart all",
     "postinstall": "lerna bootstrap"
   },

pm2-dev.yml

@@ -1,5 +1,6 @@
 apps:
   - script   : packages/cloud-api/app.js
+    interpreter : node_modules/.bin/babel-node
     watch    : ["packages"]
     name     : api
     env      :
@@ -13,6 +14,7 @@ apps:
       HONEY_DATASET: 'n1-cloud-staging'
       HONEY_WRITE_KEY: 'XXXXXXXXXXXXX'
   - script   : packages/cloud-workers/app.js
+    interpreter : node_modules/.bin/babel-node
     watch    : ["packages"]
     name     : workers
     env      :

pm2-prod-api.yml

@@ -1,5 +1,5 @@
 apps:
-  - script   : packages/cloud-api/app.js
+  - script   : n1_cloud_dist/cloud-api/app.js
     name     : api
     instances: 0
     exec_mode: cluster

pm2-prod-workers.yml

@@ -1,5 +1,5 @@
 apps:
-  - script   : packages/cloud-workers/app.js
+  - script   : n1_cloud_dist/cloud-workers/app.js
     name     : workers
     instances: 0
     exec_mode: fork

scripts/build-n1-cloud.js

@@ -0,0 +1,51 @@
+const fs = require('fs-extra');
+const glob = require('glob');
+const path = require('path');
+const babel = require('babel-core');
+
+fs.removeSync("n1_cloud_dist")
+fs.copySync("packages/cloud-api", "n1_cloud_dist/cloud-api")
+fs.copySync("packages/cloud-workers", "n1_cloud_dist/cloud-workers")
+
+fs.copySync("packages/cloud-core", "n1_cloud_dist/cloud-core")
+fs.copySync("packages/isomorphic-core", "n1_cloud_dist/isomorphic-core")
+
+glob.sync("n1_cloud_dist/**/*.es6", {absolute: true}).forEach((es6Path) => {
+  if (/(node_modules|\.js$)/.test(es6Path)) return
+  const outPath = es6Path.replace(path.extname(es6Path), '.js');
+  console.log(`---> Compiling ${es6Path.slice(es6Path.indexOf("/n1_cloud_dist") + 15)}`)
+
+  const res = babel.transformFileSync(es6Path, {
+    presets: ["electron"],
+    sourceMaps: true,
+    sourceRoot: '/',
+    sourceMapTarget: path.relative("n1_cloud_dist/", outPath),
+    sourceFileName: path.relative("n1_cloud_dist/", es6Path),
+  });
+
+  fs.writeFileSync(outPath, `${res.code}\n//# sourceMappingURL=${path.basename(outPath)}.map\n`);
+  fs.writeFileSync(`${outPath}.map`, JSON.stringify(res.map));
+  fs.unlinkSync(es6Path);
+});
+
+// Lerna bootstrap creates symlinks. Unfortunately it creates absolute
+// path symlinks that reference the pre-copied, uncompiled files. This
+// does a direct copy for each of the leran bootstrap links to ensure we
+// don't encounter symlink path problems on prod
+//
+// Fix cloud-core symlinks
+fs.removeSync("n1_cloud_dist/cloud-core/node_modules/isomorphic-core")
+fs.copySync("n1_cloud_dist/isomorphic-core", "n1_cloud_dist/cloud-core/node_modules/isomorphic-core")
+
+// Fix cloud-api symlinks
+fs.removeSync("n1_cloud_dist/cloud-api/node_modules/isomorphic-core")
+fs.removeSync("n1_cloud_dist/cloud-api/node_modules/cloud-core")
+fs.copySync("n1_cloud_dist/isomorphic-core", "n1_cloud_dist/cloud-api/node_modules/isomorphic-core")
+fs.copySync("n1_cloud_dist/cloud-core", "n1_cloud_dist/cloud-api/node_modules/cloud-core")
+
+// Fix cloud-workers symlinks
+fs.removeSync("n1_cloud_dist/cloud-workers/node_modules/isomorphic-core")
+fs.removeSync("n1_cloud_dist/cloud-workers/node_modules/cloud-core")
+fs.copySync("n1_cloud_dist/isomorphic-core", "n1_cloud_dist/cloud-workers/node_modules/isomorphic-core")
+fs.copySync("n1_cloud_dist/cloud-core", "n1_cloud_dist/cloud-workers/node_modules/cloud-core")
+