chore: Upgrade to ES2015, add .eslint.json and semantic-release

BREAKING CHANGE: This module now only supports environments that support ES2015 (because of const declarations)

.drone.yml

@@ -0,0 +1,35 @@
+---
+kind: pipeline
+name: default
+
+clone:
+  depth: 50
+
+steps:
+- name: eslint
+  image: marcbachmann/eslint:7.14.0
+  when: {event: [push]}
+  depends_on: []
+  environment:
+    GH_TOKEN:
+      from_secret: gh_token
+
+- name: test
+  image: node:14-alpine
+  commands: ["npm run test:ci -s"]
+
+- name: release
+  image: livingdocs/semantic-release:v1.0.0
+  environment:
+    GH_TOKEN:
+      from_secret: gh_token
+    NPM_TOKEN:
+      from_secret: npm_token
+
+trigger:
+  event: [push]
+---
+kind: signature
+hmac: 832b1983208921f26d969ba1fe8ba79f584fb1e55a7a2572aa0742ee9188221a
+
+...

.eslintrc.json

@@ -0,0 +1,201 @@
+{
+  "parserOptions": {
+    // Node 14 already supports ES2020, Node 12 only supports ES2019
+    // https://node.green/#ES2020
+    "ecmaVersion": 2019,
+    "ecmaFeatures": {
+      "jsx": true
+    },
+    "sourceType": "module"
+  },
+
+  "env": {
+    "es6": true,
+    "node": true,
+    "mocha": true
+  },
+
+  "plugins": [],
+
+  "globals": {
+    "document": false,
+    "navigator": false,
+    "window": false,
+    "expect": true,
+    "test": true,
+    "sinon": true,
+    "angular": true
+  },
+
+  "rules": {
+    "accessor-pairs": 2,
+    "arrow-spacing": [2, {"before": true, "after": true}],
+    "block-spacing": [2, "always"],
+    "brace-style": [2, "1tbs", {"allowSingleLine": true}],
+    "camelcase": [2, {"properties": "never"}],
+    "comma-dangle": [2, "never"],
+    "comma-spacing": [2, {"before": false, "after": true}],
+    "comma-style": [2, "last"],
+    "computed-property-spacing": [2, "never"],
+    "constructor-super": 2,
+    "curly": [2, "multi-line"],
+    "dot-location": [2, "property"],
+    "eol-last": [2, "always"],
+    "eqeqeq": [2, "allow-null"],
+    "func-call-spacing": [2, "never"],
+    "callback-return": [1, ["callback", "cb", "done"]],
+    "handle-callback-err": [2, "^(err|error)$"],
+    "indent": [2, 2, {
+      "SwitchCase": 1,
+      "VariableDeclarator": 1,
+      "outerIIFEBody": 1,
+      "FunctionDeclaration": {
+        "parameters": 1,
+        "body": 1
+      },
+      "FunctionExpression": {
+        "parameters": 1,
+        "body": 1
+      }
+    }],
+    "key-spacing": [2, {"beforeColon": false, "afterColon": true}],
+    "keyword-spacing": [2, {"before": true, "after": true}],
+    "linebreak-style": [2, "unix"],
+    "max-len": ["error", {
+      "code": 100,
+      "ignoreRegExpLiterals": true,
+      "ignorePattern": "\\s+require\\(|\\s+require\\.resolve\\(|https?://|\\s+it\\(|\\s+describe\\("
+    }],
+    "new-cap": [2, {"newIsCap": true, "capIsNew": false}],
+    "new-parens": 2,
+    "newline-per-chained-call": [2, {"ignoreChainWithDepth": 4}],
+    "no-array-constructor": 2,
+    "no-caller": 2,
+    "no-class-assign": 2,
+    "no-cond-assign": 2,
+    "no-console": [1, {"allow": ["error"]}],
+    "no-const-assign": 2,
+    "no-constant-condition": [2, {"checkLoops": false}],
+    "no-control-regex": 2,
+    "no-debugger": 2,
+    "no-delete-var": 2,
+    "no-dupe-args": 2,
+    "no-dupe-class-members": 2,
+    "no-dupe-keys": 2,
+    "no-duplicate-case": 2,
+    "no-duplicate-imports": 2,
+    "no-empty-character-class": 2,
+    "no-empty-pattern": 2,
+    "no-eval": 2,
+    "no-ex-assign": 2,
+    "no-extend-native": 2,
+    "no-extra-bind": 2,
+    "no-extra-boolean-cast": 2,
+    "no-extra-parens": [2, "functions"],
+    "no-fallthrough": 2,
+    "no-floating-decimal": 2,
+    "no-func-assign": 2,
+    "no-global-assign": 2,
+    "no-implied-eval": 2,
+    "no-inner-declarations": [2, "functions"],
+    "no-invalid-regexp": 2,
+    "no-irregular-whitespace": 2,
+    "no-iterator": 2,
+    "no-label-var": 2,
+    "no-labels": [2, {"allowLoop": false, "allowSwitch": false}],
+    "no-lone-blocks": 2,
+    "no-lonely-if": 2,
+    "no-mixed-operators": [2, {
+      "groups": [
+        ["+", "-", "*", "/", "%", "**"],
+        ["&", "|", "^", "~", "<<", ">>", ">>>"],
+        ["==", "!=", "===", "!==", ">", ">=", "<", "<="],
+        ["&&", "||"],
+        ["in", "instanceof"]
+      ],
+      "allowSamePrecedence": false
+    }],
+    "no-mixed-spaces-and-tabs": 2,
+    "no-multi-spaces": 2,
+    "no-multi-str": 2,
+    "no-multiple-empty-lines": [2, {"max": 2}],
+    "no-native-reassign": 2,
+    "no-negated-in-lhs": 2,
+    "no-nested-ternary": 2,
+    "no-new": 2,
+    "no-new-func": 2,
+    "no-new-object": 2,
+    "no-new-require": 2,
+    "no-new-symbol": 2,
+    "no-new-wrappers": 2,
+    "no-obj-calls": 2,
+    "no-octal": 2,
+    "no-octal-escape": 2,
+    "no-path-concat": 2,
+    "no-proto": 2,
+    "no-redeclare": 2,
+    "no-regex-spaces": 2,
+    "no-return-assign": [2, "except-parens"],
+    "no-self-assign": 2,
+    "no-self-compare": 2,
+    "no-sequences": 2,
+    "no-shadow-restricted-names": 2,
+    "no-shadow": ["error", { "allow": [
+      "argv",
+      "callback",
+      "cb",
+      "done",
+      "err",
+      "params"
+    ] }],
+    "no-sparse-arrays": 2,
+    "no-tabs": 2,
+    "no-template-curly-in-string": 2,
+    "no-this-before-super": 2,
+    "no-throw-literal": 2,
+    "no-trailing-spaces": 2,
+    "no-undef": 2,
+    "no-undef-init": 2,
+    "no-unexpected-multiline": 2,
+    "no-unmodified-loop-condition": 2,
+    "no-unneeded-ternary": [2, {"defaultAssignment": false}],
+    "no-unreachable": 2,
+    "no-unsafe-finally": 2,
+    "no-unsafe-negation": 2,
+    "no-unused-vars": [2, {"vars": "all", "args": "none"}],
+    "no-useless-call": 2,
+    "no-useless-computed-key": 2,
+    "no-useless-constructor": 2,
+    "no-useless-escape": 2,
+    "no-useless-rename": 2,
+    "no-var": 2,
+    "no-whitespace-before-property": 2,
+    "no-with": 2,
+    "object-curly-spacing": [2, "never"],
+    "object-property-newline": [2, {"allowMultiplePropertiesPerLine": true}],
+    "one-var": [2, {"initialized": "never"}],
+    "operator-linebreak": [2, "after", {"overrides": {"?": "before", ":": "before"}}],
+    "padded-blocks": [0, "never"],
+    "prefer-template": 2,
+    "prefer-const": [2, {"destructuring": "any", "ignoreReadBeforeAssign": true}],
+    "quotes": [2, "single", {"avoidEscape": true, "allowTemplateLiterals": true}],
+    "rest-spread-spacing": [2, "never"],
+    "semi": [2, "never"],
+    "semi-spacing": [2, {"before": false, "after": true}],
+    "space-before-blocks": [2, "always"],
+    "space-before-function-paren": [2, "always"],
+    "space-in-parens": [2, "never"],
+    "space-infix-ops": 2,
+    "space-unary-ops": [2, {"words": true, "nonwords": false}],
+    "spaced-comment": [2, "always",
+      {"line": {"markers": ["*package", "!", ","]}, "block": {"balanced": true, "markers": ["*package", "!", ","], "exceptions": ["*"]}}
+    ],
+    "template-curly-spacing": [2, "never"],
+    "unicode-bom": [2, "never"],
+    "use-isnan": 2,
+    "valid-typeof": 2,
+    "wrap-iife": [2, "any", {"functionPrototypeMethods": true}],
+    "yield-star-spacing": [2, "both"],
+    "yoda": [2, "never"]
+  }
+}

bin/build-language-file.js

@@ -1,6 +1,6 @@
-var fs = require('fs')
-var path = require('path')
+const fs = require('fs')
+const path = require('path')
 
-var dir = path.resolve('data')
-var languages = fs.readdirSync(dir).map(function (p) { return p.split('.')[0] })
-console.log(JSON.stringify(languages))
+const dir = path.resolve('data')
+const languages = fs.readdirSync(dir).map(function (p) { return p.split('.')[0] })
+console.log(JSON.stringify(languages)) // eslint-disable-line no-console

browser.js

@@ -8,7 +8,7 @@ function compose (countries) {
     )
   }
 
-  var list = Object.keys(countries).map(function (code) {
+  const list = Object.keys(countries).map(function (code) {
     return {code: code, label: countries[code]}
   })
 

node.js

@@ -1,15 +1,14 @@
 module.exports = compose
 
-var api = require('./browser')
+const api = require('./browser')
 
 function compose (lang) {
   try {
-    var countries = require('./data/' + lang)
+    const countries = require(`./data/${lang}`)
+    return api(countries)
   } catch (err) {
-    throw new Error('Language "' + lang + '" not found')
+    throw new Error(`Language "${lang}" not found`)
   }
-
-  return api(countries)
 }
 
 compose.languages = function () {