Merge branch 'master' into ThewBear-20366

.eslintignore

@@ -0,0 +1,25 @@
+
+**/coverage/**
+**/node_modules/**
+bin/
+packages/*/dist/**
+packages/*/lib/**
+packages/*/scripts/**
+**/dist/*
+**/__testfixtures__/**
+**/__tests__/fixtures/**
+peril
+docs
+plop-templates
+starters
+www
+benchmarks
+e2e-tests
+examples
+integration-tests
+**/*.d.ts
+
+packages/*/*.js
+packages/gatsby-plugin-preload-fonts/prepare/*.js
+packages/gatsby-image/withIEPolyfill/index.js
+packages/gatsby/cache-dir/commonjs/**/*

.eslintrc.js

@@ -0,0 +1,142 @@
+const TSEslint = require("@typescript-eslint/eslint-plugin")
+
+module.exports = {
+  parser: "babel-eslint",
+  extends: [
+    "google",
+    "eslint:recommended",
+    "plugin:flowtype/recommended",
+    "plugin:react/recommended",
+    "prettier",
+    "prettier/flowtype",
+    "prettier/react",
+  ],
+  plugins: ["flowtype", "prettier", "react", "filenames"],
+  parserOptions: {
+    ecmaVersion: 2016,
+    sourceType: "module",
+    ecmaFeatures: {
+      jsx: true,
+    },
+  },
+  env: {
+    browser: true,
+    es6: true,
+    node: true,
+    jest: true,
+  },
+  globals: {
+    before: true,
+    after: true,
+    spyOn: true,
+    __PATH_PREFIX__: true,
+    __BASE_PATH__: true,
+    __ASSET_PREFIX__: true,
+  },
+  rules: {
+    "arrow-body-style": [
+      "error",
+      "as-needed",
+      { requireReturnForObjectLiteral: true },
+    ],
+    "no-unused-expressions": [
+      "error",
+      {
+        allowTaggedTemplates: true,
+      },
+    ],
+    "consistent-return": ["error"],
+    "filenames/match-regex": ["error", "^[a-z-\\d\\.]+$", true],
+    "no-console": "off",
+    "no-inner-declarations": "off",
+    "prettier/prettier": "error",
+    quotes: ["error", "backtick"],
+    "react/display-name": "off",
+    "react/jsx-key": "warn",
+    "react/no-unescaped-entities": "off",
+    "react/prop-types": "off",
+    "require-jsdoc": "off",
+    "valid-jsdoc": "off",
+  },
+  overrides: [
+    {
+      files: [
+        "packages/**/gatsby-browser.js",
+        "packages/gatsby/cache-dir/**/*",
+      ],
+      env: {
+        browser: true,
+      },
+      globals: {
+        ___loader: false,
+        ___emitter: false,
+      },
+    },
+    {
+      files: ["**/cypress/integration/**/*", "**/cypress/support/**/*"],
+      globals: {
+        cy: false,
+        Cypress: false,
+      },
+    },
+    {
+      files: ["*.ts", "*.tsx"],
+      parser: "@typescript-eslint/parser",
+      plugins: ["@typescript-eslint/eslint-plugin"],
+      rules: {
+        ...TSEslint.configs.recommended.rules,
+        // This rule ensures that typescript types do not have semicolons
+        // at the end of their lines, since our prettier setup is to have no semicolons
+        // e.g.,
+        // interface Foo {
+        // -  baz: string;
+        // +  baz: string
+        // }
+        "@typescript-eslint/member-delimiter-style": [
+          "error",
+          {
+            multiline: {
+              delimiter: "none",
+            },
+          },
+        ],
+        // This ensures all interfaces are named with an I as a prefix
+        // e.g.,
+        // interface IFoo {}
+        "@typescript-eslint/interface-name-prefix": [
+          "error",
+          { prefixWithI: "always" },
+        ],
+        "@typescript-eslint/no-empty-function": "off",
+        // This ensures that we always type the return type of functions
+        // a high level focus of our TS setup is typing fn inputs and outputs.
+        "@typescript-eslint/explicit-function-return-type": "error",
+        // This forces us to use interfaces over types aliases for object defintions.
+        // Type is still useful for opaque types
+        // e.g.,
+        // type UUID = string
+        "@typescript-eslint/consistent-type-definitions": [
+          "error",
+          "interface",
+        ],
+
+        // Allows us to write unions like `type Foo = "baz" | "bar"`
+        // otherwise eslint will want to switch the strings to backticks,
+        // which then crashes the ts compiler
+        quotes: "off",
+        "@typescript-eslint/quotes": [
+          2,
+          "backtick",
+          {
+            avoidEscape: true,
+          },
+        ],
+      },
+    },
+  ],
+  settings: {
+    react: {
+      version: "16.4.2",
+    },
+  },
+}

.github/ISSUE_TEMPLATE/bug_report.md

@@ -3,8 +3,6 @@ name: Bug Report 🐞
 about: Something isn't working as expected? Here is the right place to report.
 ---
 
-<!-- Gatsby OSS team is on holiday, expect a delayed response -->
-
 <!--
   Please fill out each section below, otherwise, your issue will be closed. This info allows Gatsby maintainers to diagnose (and fix!) your issue as quickly as possible.
 

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,11 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Gatsby Documentation
+    url: https://www.gatsbyjs.org/docs/
+    about: Check out the Gatsby documentation for answers to common questions
+  - name: Gatsby Discord
+    url: http://gatsby.dev/discord
+    about: Ask questions, get help and discuss new things you're building with the Gatsby community
+  - name: AskGatsbyJS Twitter
+    url: https://twitter.com/AskGatsbyJS
+    about: The official Twitter account to ask questions and get help with Gatsby

.github/ISSUE_TEMPLATE/documentation.md

@@ -3,8 +3,6 @@ name: Documentation 📝
 about: Suggest better docs coverage for a particular tool or process.
 ---
 
-<!-- Gatsby OSS team is on holiday, expect a delayed response -->
-
 <!--
   To make it easier for us to help you, please include as much useful information as possible.
 

.github/ISSUE_TEMPLATE/feature_request.md

@@ -3,8 +3,6 @@ name: Feature Request 💡
 about: Suggest a new idea for the project.
 ---
 
-<!-- Gatsby OSS team is on holiday, expect a delayed response -->
-
 <!--
   Please fill out each section below, otherwise, your issue will be closed.
 

.github/ISSUE_TEMPLATE/new_translation.md

@@ -3,8 +3,6 @@ name: New Translation Request 🌐
 about: Suggest a new language translation of the repo.
 ---
 
-<!-- Gatsby OSS team is on holiday, expect a delayed response -->
-
 <!--
   Please fill out the YAML form below, otherwise, your issue will be closed.
 

.github/ISSUE_TEMPLATE/question.md

@@ -3,8 +3,6 @@ name: Question 🤔
 about: Usage question or discussion about Gatsby.
 ---
 
-<!-- Gatsby OSS team is on holiday, expect a delayed response -->
-
 <!--
   To make it easier for us to help you, please include as much useful information as possible.
 

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,3 @@
-<!-- Gatsby OSS team is on holiday, expect a delayed response -->
-
 <!--
   Have any questions? Check out the contributing docs at https://gatsby.dev/contribute, or
   ask in this Pull Request and a Gatsby maintainer will be happy to help :)

.gitignore

@@ -52,6 +52,7 @@ node_modules/
 
 # misc
 .serverless/
+.eslintcache
 
 # lock files
 yarn.lock