feat: switch to Yarn + Yarn workspaces

Author: sghoweri

Diff for: .gitignore

@@ -12,3 +12,4 @@ packages/*/public
 !packages/core/test/patterns/testDependencyGraph.json
 lerna-debug.log
 packages/edition-node-gulp/dependencyGraph.json
+packages/uikit-workshop/dist

Diff for: .travis.yml

@@ -4,19 +4,21 @@ addons:
   chrome: stable
 
 before_install:
-  - phantomjs --version
+  # version lifted from `.nvmrc`
+  - nvm install
+  - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.19.0
+  - export PATH="$HOME/.yarn/bin:$PATH"
 
 before_script:
-  - npm install -g [email protected]
-  - npm run setup
-  - lerna add @pattern-lab/engine-mustache --scope=@pattern-lab/core
-  - lerna add @pattern-lab/engine-handlebars --scope=@pattern-lab/core
-  - lerna add @pattern-lab/engine-underscore --scope=@pattern-lab/core
-  - lerna add @pattern-lab/engine-liquid --scope=@pattern-lab/core
-  - lerna add @pattern-lab/engine-twig --scope=@pattern-lab/core
-  - lerna add @pattern-lab/engine-react --scope=@pattern-lab/core
+  - yarn run setup
+  - npx lerna add @pattern-lab/engine-mustache --scope=@pattern-lab/core
+  - npx lerna add @pattern-lab/engine-handlebars --scope=@pattern-lab/core
+  - npx lerna add @pattern-lab/engine-underscore --scope=@pattern-lab/core
+  - npx lerna add @pattern-lab/engine-liquid --scope=@pattern-lab/core
+  - npx lerna add @pattern-lab/engine-twig --scope=@pattern-lab/core
+  - npx lerna add @pattern-lab/engine-react --scope=@pattern-lab/core
 
-script: travis_wait npm run test
+script: travis_wait yarn run test
 
 branches:
   only:

Diff for: lerna.json

@@ -1,28 +1,38 @@
 {
   "lerna": "3.11.0",
+  "version": "0.0.0",
   "packages": [
     "packages/*"
   ],
-  "version": "independent",
   "command": {
     "init": {
       "exact": true
     },
-    "bootstrap": {
-      "hoist": [
-        "tap",
-        "eslin*",
-        "husky",
-        "prettier",
-        "pretty-quick",
-        "babel-eslint"
-      ]
-    },
     "publish": {
-      "allowBranch": "master"
+      "allowBranch": [
+        "master",
+        "dev"
+      ],
+      "conventionalCommits": true,
+      "gitReset": true,
+      "includeMergedTags": true,
+      "noCommitHooks": true,
+      "verifyAccess": true
+    },
+    "changed": {
+      "includeMergedTags": true
     }
   },
+  "ignoreChanges": [
+    "**/__fixtures__/**",
+    "**/__tests__/**",
+    "**/*.md",
+    "**/__snapshots__/**"
+  ],
+  "npmClient": "yarn",
   "npmClientArgs": [
+    "--ignore-optional",
     "--registry=https://registry.npmjs.org/"
-  ]
+  ],
+  "useWorkspaces": true
 }

Diff for: package.json

@@ -1,4 +1,14 @@
 {
+  "workspaces": {
+    "packages": [
+      "packages/*"
+    ],
+    "nohoist": [
+      "@pattern-lab/engine-*",
+      "**/@pattern-lab/engine-*",
+      "**/@pattern-lab/uikit-workshop"
+    ]
+  },
   "dependencies": {
     "@babel/plugin-proposal-decorators": "^7.4.4",
     "@babel/plugin-syntax-jsx": "^7.2.0",
@@ -8,8 +18,8 @@
     "eslint-config-prettier": "^6.0.0",
     "eslint-plugin-import": "^2.18.2",
     "eslint-plugin-prettier": "^3.1.0",
-    "lerna": "3.11.0",
     "prettier": "^1.14.3",
+    "lerna": "3.17.0",
     "pretty-quick": "^1.11.1",
     "auto": "^7.8.0"
   },