Set up basic Circle CI configuration (cruise-automation#2)

With linting and testing for now. Tightened the linter a bit to not even
allow warnings, and fixed the one warning that we had.

.circleci/config.yml

@@ -0,0 +1,37 @@
+# See https://circleci.com/docs/2.0/language-javascript/
+version: 2
+jobs:
+  build:
+    docker:
+      - image: circleci/node:11-browsers
+
+    steps:
+      - checkout
+
+      - restore_cache:
+          keys:
+          - global-deps-{{ checksum "package-lock.json" }}
+          - global-deps-
+
+      - restore_cache:
+          keys:
+          - regl-worldview-deps-{{ checksum "package-lock.json" }}
+          - regl-worldview-deps-
+
+      - run: npm run bootstrap
+
+      - save_cache:
+          paths: ["node_modules"]
+          key: global-deps-{{ checksum "package-lock.json" }}
+
+      - save_cache:
+          paths: ["packages/regl-worldview/node_modules"]
+          key: regl-worldview-deps-{{ checksum "packages/regl-worldview/package-lock.json" }}
+
+      - run:
+          name: "npm run lint"
+          command: npm run lint
+
+      - run:
+          name: "npm test"
+          command: npm test

package.json

@@ -67,7 +67,7 @@
     "bootstrap": "npm install && lerna exec npm install",
     "build": "lerna run build",
     "clean": "lerna run clean",
-    "lint": "eslint packages",
+    "lint": "eslint packages --max-warnings=0",
     "lint:fix": "eslint packages --fix",
     "test": "lerna run test",
     "link": "lerna link --force-local",

packages/regl-worldview/src/utils/eulerFromQuaternion.js

@@ -15,8 +15,8 @@ const scratch = [0, 0, 0, 0, 0, 0, 0, 0, 0];
 export default function eulerFromQuaternion(out: number[], q: Vec4): Vec3 {
   const m = mat3.fromQuat(scratch, q);
   const m11 = m[0], m12 = m[3], m13 = m[6]; // prettier-ignore
-  const m21 = m[1], m22 = m[4], m23 = m[7]; // prettier-ignore
-  const m31 = m[2], m32 = m[5], m33 = m[8]; // prettier-ignore
+  const             m22 = m[4], m23 = m[7]; // prettier-ignore
+  const             m32 = m[5], m33 = m[8]; // prettier-ignore
 
   out[1] = Math.asin(m13 < -1 ? -1 : m13 > 1 ? 1 : m13);
   if (Math.abs(m13) < 0.99999) {