Use Yarn Workspaces (#6056)

* update lerna and lerna-changelog

* Lerna: enable yarn, yarn workspaces [skip ci]

* use older version of Babel since it matches on semver (cannot be the same version)

* install yarn version

* revert node engine change

* update flow

* circle ci on 8

* update lock

.flowconfig

@@ -13,6 +13,5 @@ lib/types.js
 lib/third-party-libs.js.flow
 
 [options]
-strip_root=true
 suppress_comment= \\(.\\|\n\\)*\\$FlowFixMe
 suppress_comment= \\(.\\|\n\\)*\\$FlowIssue

.travis.yml

@@ -12,8 +12,13 @@ node_js:
   - '4'
 
 env:
+  global:
+    - PATH=$HOME/.yarn/bin:$PATH
     - JOB=test
 
+before_install:
+  - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 0.28.1
+
 script:
   - 'if [ "$JOB" = "test" ]; then make test-ci; fi'
   - 'if [ "$JOB" = "lint" ]; then make lint && make flow; fi'

.yarnrc

@@ -0,0 +1 @@
+workspaces-experimental true

Makefile

@@ -26,7 +26,7 @@ lint:
 	./node_modules/.bin/eslint scripts packages *.js --format=codeframe
 
 flow:
-	./node_modules/.bin/flow check
+	./node_modules/.bin/flow check --strip-root
 
 fix:
 	./node_modules/.bin/eslint scripts packages *.js --format=codeframe --fix

circle.yml

@@ -1,7 +1,7 @@
 machine:
   node:
     version:
-      6
+      8
 
 dependencies:
   pre:

lerna.json

@@ -2,7 +2,6 @@
   "lerna": "2.0.0-rc.4",
   "version": "7.0.0-alpha.18",
   "changelog": {
-    "repo": "babel/babel",
     "labels": {
       "tag: spec compliancy": ":eyeglasses: Spec Compliancy",
       "tag: breaking change": ":boom: Breaking Change",
@@ -21,5 +20,10 @@
         "test/**"
       ]
     }
-  }
+  },
+  "packages": [
+    "packages/*"
+  ],
+  "npmClient": "yarn",
+  "useWorkspaces": true
 }

package.json

@@ -11,14 +11,14 @@
   },
   "devDependencies": {
     "async": "^1.5.0",
-    "babel-cli": "7.0.0-alpha.18",
-    "babel-core": "7.0.0-alpha.18",
+    "babel-cli": "7.0.0-alpha.15",
+    "babel-core": "7.0.0-alpha.15",
     "babel-eslint": "8.0.0-alpha.15",
     "babel-plugin-istanbul": "^4.1.4",
-    "babel-preset-env": "2.0.0-alpha.18",
-    "babel-preset-flow": "7.0.0-alpha.18",
-    "babel-preset-stage-0": "7.0.0-alpha.18",
-    "babel-register": "7.0.0-alpha.18",
+    "babel-preset-env": "2.0.0-alpha.15",
+    "babel-preset-flow": "7.0.0-alpha.15",
+    "babel-preset-stage-0": "7.0.0-alpha.15",
+    "babel-register": "7.0.0-alpha.15",
     "browserify": "^13.1.1",
     "bundle-collapser": "^1.2.1",
     "chai": "^4.1.0",
@@ -28,16 +28,16 @@
     "eslint-config-babel": "^7.0.1",
     "eslint-plugin-flowtype": "^2.20.0",
     "eslint-plugin-prettier": "^2.1.2",
-    "flow-bin": "^0.41.0",
+    "flow-bin": "^0.52.0",
     "gulp": "^3.9.0",
-    "gulp-babel": "7.0.0-alpha.18",
+    "gulp-babel": "babel/gulp-babel#d8c67b",
     "gulp-newer": "^1.0.0",
     "gulp-plumber": "^1.0.1",
     "gulp-util": "^3.0.7",
     "gulp-watch": "^4.3.5",
     "husky": "^0.13.2",
-    "lerna": "2.0.0-rc.4",
-    "lerna-changelog": "^0.2.0",
+    "lerna": "2.0.0",
+    "lerna-changelog": "^0.6.0",
     "lint-staged": "^3.6.1",
     "lodash": "^4.2.0",
     "mocha": "^3.0.0",
@@ -50,8 +50,8 @@
     "uglify-js": "^2.4.16"
   },
   "engines": {
-    "node": ">= 6.x <= 8.x",
-    "npm": ">= 3.x <= 5.x"
+    "node": ">= 4.x <= 8.x",
+    "npm": ">= 2.x <= 5.x"
   },
   "nyc": {
     "all": true,
@@ -67,5 +67,8 @@
       "eslint --format=codeframe --fix",
       "git add"
     ]
-  }
+  },
+  "workspaces": [
+    "packages/*"
+  ]
 }

packages/babel-core/src/config/option-manager.js

@@ -1,5 +1,3 @@
-// @flow
-
 import * as context from "../index";
 import Plugin from "./plugin";
 import * as messages from "babel-messages";

packages/babel-helper-wrap-function/src/index.js

@@ -1,5 +1,3 @@
-/* @flow */
-
 import type { NodePath } from "babel-traverse";
 import nameFunction from "babel-helper-function-name";
 import template from "babel-template";

packages/babel-plugin-transform-es2015-arrow-functions/src/index.js

@@ -1,5 +1,3 @@
-// @flow
-
 import type NodePath from "babel-traverse";
 
 export default function() {