Update xo

Closes GH-102.

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-- '0.11'
+- '4.0'
 - '5.0'
 - '6.0'
 after_success: bash <(curl -s https://codecov.io/bash)

package.json

@@ -29,7 +29,7 @@
     "trim": "0.0.1",
     "unist-builder": "^1.0.2",
     "unist-util-remove-position": "^1.1.0",
-    "xo": "^0.16.0"
+    "xo": "^0.17.0"
   },
   "scripts": {
     "prepublish": "lerna bootstrap",
@@ -54,6 +54,7 @@
   "xo": {
     "space": true,
     "rules": {
+      "import/no-dynamic-require": "off",
       "guard-for-in": "off",
       "no-eq-null": "off",
       "eqeqeq": "off"

packages/remark-lint/lib/rules/blockquote-indentation.js

@@ -79,7 +79,7 @@ function blockquoteIndentation(ast, file, preferred) {
     var diff;
     var word;
 
-    if (position.generated(node) || !node.children.length) {
+    if (position.generated(node) || node.children.length === 0) {
       return;
     }
 

packages/remark-lint/lib/rules/emphasis-marker.js

@@ -67,8 +67,8 @@ module.exports = emphasisMarker;
 /* Map of valid markers. */
 var MARKERS = {
   '*': true,
-  '_': true,
-  'null': true
+  _: true,
+  null: true
 };
 
 /**

packages/remark-lint/lib/rules/fenced-code-flag.js

@@ -109,7 +109,7 @@ function fencedCodeFlag(ast, file, preferred) {
     }
 
     if (node.lang) {
-      if (flags.length && flags.indexOf(node.lang) === -1) {
+      if (flags.length !== 0 && flags.indexOf(node.lang) === -1) {
         file.message('Invalid code-language flag', node);
       }
     } else if (/^ {0,3}([~`])\1{2,}/.test(value) && !allowEmpty) {

packages/remark-lint/lib/rules/fenced-code-marker.js

@@ -70,7 +70,7 @@ module.exports = fencedCodeMarker;
 var MARKERS = {
   '`': true,
   '~': true,
-  'null': true
+  null: true
 };
 
 /**

packages/remark-lint/lib/rules/link-title-style.js

@@ -80,7 +80,7 @@ var MARKERS = {
   '"': true,
   '\'': true,
   ')': true,
-  'null': true
+  null: true
 };
 
 /**

packages/remark-lint/lib/rules/list-item-indent.js

@@ -83,8 +83,8 @@ var start = position.start;
 /* Styles. */
 var STYLES = {
   'tab-size': true,
-  'mixed': true,
-  'space': true
+  mixed: true,
+  space: true
 };
 
 /**

packages/remark-lint/lib/rules/no-blockquote-without-caret.js

@@ -49,7 +49,7 @@ function noBlockquoteWithoutCaret(ast, file) {
     var start = position.start(node).line;
     var indent = node.position && node.position.indent;
 
-    if (position.generated(node) || !indent || !indent.length) {
+    if (position.generated(node) || !indent || indent.length === 0) {
       return;
     }
 

packages/remark-lint/lib/rules/ordered-list-marker-style.js

@@ -64,7 +64,7 @@ var start = position.start;
 var STYLES = {
   ')': true,
   '.': true,
-  'null': true
+  null: true
 };
 
 /**

packages/remark-lint/lib/rules/strong-marker.js

@@ -54,8 +54,8 @@ module.exports = strongMarker;
 /* Map of valid markers. */
 var MARKERS = {
   '*': true,
-  '_': true,
-  'null': true
+  _: true,
+  null: true
 };
 
 /**

packages/remark-lint/lib/rules/unordered-list-marker-style.js

@@ -59,7 +59,7 @@ var STYLES = {
   '-': true,
   '*': true,
   '+': true,
-  'null': true
+  null: true
 };
 
 /**

script/build-docs.js

@@ -63,7 +63,7 @@ var markdown = remark().use(toc);
           u('text', ' is ')
         ];
 
-        if (fixture.output.length) {
+        if (fixture.output.length !== 0) {
           sentence.push(
             u('strong', [u('text', 'not')]),
             u('text', ' ')
@@ -87,7 +87,7 @@ var markdown = remark().use(toc);
           );
         }
 
-        if (fixture.output.length) {
+        if (fixture.output.length !== 0) {
           children.push(
             u('code', {lang: 'text'}, fixture.output.join('\n'))
           );

script/build-presets.js

@@ -17,14 +17,8 @@ var chalk = require('chalk');
 var remark = require('remark');
 var decamelize = require('decamelize-keys');
 var remote = require('../package.json').repository;
-var rules = require('./util/rules');
 
 var root = path.join(process.cwd(), 'packages');
-var core = path.join(root, 'remark-lint');
-
-rules = rules(core).map(function (fp) {
-  return path.basename(fp, path.extname(fp));
-});
 
 /* Generate. */
 fs