feat: Add CircleCI config (#15)

* chore: Add circleci config file

* chore: update README with status badge

Added the a first test to the workflow: Linting

Closes #13

.circleci/config.yml

@@ -0,0 +1,59 @@
+executors:
+  node:
+    parameters:
+      image:
+        type: string
+        default: "lts"
+    docker:
+      - image: circleci/node:<< parameters.image >>
+        environment:
+          TERM: xterm
+
+aliases:
+  restore_cache: &restore_cache
+    restore_cache:
+      name: Restore Yarn Package Cache
+      keys:
+        - v{{ .Environment.versionCache }}-deps-{{ .Branch }}-{{ checksum "yarn.lock" }}-{{ checksum ".circleci/config.yml" }}
+
+  install_node_modules: &install_node_modules
+    run:
+      name: Install Yarn Packages
+      command: yarn install --frozen-lockfile --ignore-engines
+
+  save_cache: &save_cache
+    save_cache:
+      name: Save Yarn Package Cache
+      key: v{{ .Environment.versionCache }}-deps-{{ .Branch }}-{{ checksum "yarn.lock" }}-{{ checksum ".circleci/config.yml" }}
+      paths:
+        - /home/circleci/.cache
+
+  store_results: &store_results
+    store_test_results:
+      path: results
+
+  store_results_artifacts: &store_results_artifacts
+    store_artifacts:
+      path: results
+
+version: 2.1
+
+jobs:
+  lint:
+    executor: node
+    steps:
+      - checkout
+      - <<: *restore_cache
+      - <<: *install_node_modules
+      - <<: *save_cache
+      - run:
+          name: Run ESLint
+          command: yarn lint:ci
+      - <<: *store_results
+      - <<: *store_results_artifacts
+
+workflows:
+  version: 2
+  lint-test:
+    jobs:
+      - lint

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019 Lennart
+Copyright (c) 2019 LekoArts
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -11,6 +11,9 @@
   <a href="https://github.com/LekoArts/gatsby-themes/blob/master/LICENSE">
     <img src="https://img.shields.io/badge/license-MIT-blue.svg" alt="@lekoarts/gatsby-themes is released under the MIT license." />
   </a>
+  <a href="https://circleci.com/gh/LekoArts/gatsby-themes">
+    <img src="https://circleci.com/gh/LekoArts/gatsby-themes.svg?style=svg" alt="CircleCI Status" />
+  </a>
   <img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRs welcome!" />
   <a href="https://twitter.com/intent/follow?screen_name=lekoarts_de">
     <img src="https://img.shields.io/twitter/follow/lekoarts_de.svg?label=Follow%20@lekoarts_de" alt="Follow @lekoarts_de" />
@@ -49,4 +52,4 @@ If you want to receive monthly updates on my themes and all things related to Ga
 
 - [Gatsbyjs.org - Gatsby Themes](https://www.gatsbyjs.org/docs/themes/)
 - [Building a Theme](https://www.gatsbyjs.org/tutorial/building-a-theme)
-- [Free egghead.io "Gatsby Theme Authoring" course](https://egghead.io/courses/gatsby-theme-authoring)
+- [Free egghead.io "Gatsby Theme Authoring" course](https://egghead.io/courses/gatsby-theme-authoring)

package.json

@@ -14,6 +14,7 @@
     "tsc": "tsc",
     "lint": "eslint './themes/**/*' './examples/**/*'",
     "lint:fix": "yarn lint --fix",
+    "lint:ci": "yarn lint --format junit -o results/eslint/result.xml",
     "format": "prettier \"{examples,themes}/**/*.md\" --write",
     "format:mdx": "prettier --parser mdx \"{examples,themes}/**/*.mdx\" --write",
     "lerna": "lerna"