Build: Update dependencies

* Update dependencies.
* Switch from JSHint to ESLint.

Closes #81.

Author: mgol

.eslintrc.json

@@ -0,0 +1,20 @@
+{
+  "root": true,
+
+  "extends": "jquery",
+
+  "reportUnusedDisableDirectives": true,
+
+  "parserOptions": {
+    "ecmaVersion": 2018
+  },
+
+  "env": {
+    "es6": true,
+    "node": true
+  },
+
+  "rules": {
+    "strict": ["error", "global"]
+  }
+}

.jshintrc

@@ -1,20 +1,22 @@
-module.exports = function( grunt ) {
+"use strict";
 
-grunt.loadNpmTasks( "grunt-contrib-jshint" );
+module.exports = function( grunt ) {
 
-grunt.initConfig({
+grunt.initConfig( {
 	watch: {
 		files: "<config:lint.files>",
 		tasks: "default"
 	},
-	jshint: {
+	eslint: {
 		options: {
 			jshintrc: true
 		},
-		files: [ "Gruntfile.js", "tasks/**/*.js" ]
+		files: [ "*.js", "lib/**/*.js", "tasks/**/*.js" ]
 	}
-});
+} );
+
+grunt.loadNpmTasks( "grunt-eslint" );
 
-grunt.registerTask( "default", "jshint" );
+grunt.registerTask( "default", "eslint" );
 
 };

.npmrc

@@ -1,9 +1,11 @@
-var syntaxHighlight = require( "./lib/highlight" );
+"use strict";
+
+const syntaxHighlight = require( "./lib/highlight" );
 
 exports.syntaxHighlight = syntaxHighlight;
 
 exports.postPreprocessors = {
-	_default: function( post, fileName, callback ) {
+	_default( post, _fileName, callback ) {
 		callback( null, post );
 	}
 };

Gruntfile.js

@@ -1,20 +1,22 @@
-var fs = require( "fs" ),
-	hljs = require( "highlight.js" ),
-	cheerio = require( "cheerio" ),
-	he = require( "he" ),
-	grunt = require( "grunt" ),
-	lineNumberTemplate = fs.readFileSync( __dirname + "/lineNumberTemplate.jst", "utf-8" );
+"use strict";
+
+const fs = require( "fs" );
+const hljs = require( "highlight.js" );
+const cheerio = require( "cheerio" );
+const he = require( "he" );
+const grunt = require( "grunt" );
+const lineNumberTemplate = fs.readFileSync( __dirname + "/lineNumberTemplate.jst", "utf-8" );
 
 // When parsing the class attribute, make sure a class matches an actually
 // highlightable language, instead of being presentational (e.g. 'example')
 function getLanguageFromClass( str ) {
-	var classes = (str || "").split( " " ),
+	var classes = ( str || "" ).split( " " ),
 		i = 0,
 		length = classes.length;
 
 	for ( ; i < length; i++ ) {
-		if ( hljs.LANGUAGES[ classes[ i ].replace( /^lang-/, "" ) ] ) {
-			return classes[i].replace( /^lang-/, "" );
+		if ( hljs.getLanguage( classes[ i ].replace( /^lang-/, "" ) ) ) {
+			return classes[ i ].replace( /^lang-/, "" );
 		}
 	}
 
@@ -27,34 +29,34 @@ function outdent( string ) {
 		minTabs = Infinity,
 		rLeadingTabs = /^\t+/;
 
-	string.split( "\n" ).forEach(function( line, i, arr ) {
+	string.split( "\n" ).forEach( function( line, i, arr ) {
 
 		// Don't include first or last line if it's nothing but whitespace
-		if ( (i === 0 || i === arr.length - 1) && !line.trim().length ) {
+		if ( ( i === 0 || i === arr.length - 1 ) && !line.trim().length ) {
 			return;
 		}
 
 		// For empty lines inside the snippet, push a space so the line renders properly
 		if ( !line.trim().length ) {
-			adjustedLines.push(" ");
+			adjustedLines.push( " " );
 			return;
 		}
 
 		// Count how many leading tabs there are and update the global minimum
 		var match = line.match( rLeadingTabs ),
-			tabs = match ? match[0].length : 0;
+			tabs = match ? match[ 0 ].length : 0;
 		minTabs = Math.min( minTabs, tabs );
 
 		adjustedLines.push( line );
-	});
+	} );
 
 	if ( minTabs !== Infinity ) {
 
 		// Outdent the lines as much as possible
 		rOutdent = new RegExp( "^\t{" + minTabs + "}" );
-		adjustedLines = adjustedLines.map(function( line ) {
+		adjustedLines = adjustedLines.map( function( line ) {
 			return line.replace( rOutdent, "" );
-		});
+		} );
 	}
 
 	return adjustedLines.join( "\n" );
@@ -63,25 +65,25 @@ function outdent( string ) {
 function syntaxHighlight( html ) {
 	var $ = cheerio.load( html );
 
-	$( "pre > code" ).each(function() {
+	$( "pre > code" ).each( function() {
 		var $t = $( this ),
 			code = he.decode( outdent( $t.html() ) ),
 			lang = $t.attr( "data-lang" ) ||
 				getLanguageFromClass( $t.attr( "class" ) ) ||
-				(code.trim().charAt( 0 ) === "<" ? "xml" : "") ||
+				( code.trim().charAt( 0 ) === "<" ? "xml" : "" ) ||
 				"javascript",
 			linenumAttr = $t.attr( "data-linenum" ),
 			linenum = parseInt( linenumAttr, 10 ) || 1,
-			gutter = linenumAttr === "false" ? false : true,
-			highlighted = hljs.highlight( lang, code ),
-			fixed = hljs.fixMarkup( highlighted.value, "  " );
+			gutter = linenumAttr !== "false",
+			highlighted = hljs.highlight( code, { language: lang } ),
+			fixed = highlighted.value.replace( /\t/g, "  " );
 
 		// Handle multi-line comments (#32)
 		fixed = fixed.replace(
-			/<span class="comment">\/\*([^<]+)\*\/<\/span>/g,
-			function( full, comment ) {
-				return "<span class=\"comment\">/*" +
-					comment.split( "\n" ).join( "</span>\n<span class=\"comment\">" ) +
+			/<span class="hljs-comment">\/\*([^<]+)\*\/<\/span>/g,
+			function( _full, comment ) {
+				return "<span class=\"hljs-comment\">/*" +
+					comment.split( "\n" ).join( "</span>\n<span class=\"hljs-comment\">" ) +
 					"*/</span>";
 			}
 		);
@@ -93,8 +95,8 @@ function syntaxHighlight( html ) {
 				gutter: gutter,
 				lang: lang
 			}
-		}));
-	});
+		} ) );
+	} );
 
 	return $.html();
 }

index.js

@@ -1,16 +1,16 @@
-var fs = require( "fs" ),
-	async = require( "async" ),
-	marked = require( "marked" );
+"use strict";
+
+const fs = require( "fs" );
+const async = require( "async" );
+const marked = require( "marked" );
 
 function htmlEscape( text ) {
 	return text
 
 		// Supports keeping markup in source file, but drop from inline sample
 		.replace(
 			/<!-- @placeholder-start\((.+)\) -->[\s\S]+@placeholder-end -->/g,
-			function( match, input ) {
-				return "<!-- " + input + " -->";
-			}
+			( _match, input ) => "<!-- " + input + " -->"
 		)
 		.replace( /&/g, "&amp;" )
 		.replace( /</g, "&lt;" )
@@ -28,7 +28,7 @@ function parseMarkdown( src, options ) {
 		return marked.parser( tokens );
 	}
 
-	tokens.forEach(function( item ) {
+	tokens.forEach( function( item ) {
 		if ( item.type !== "heading" ) {
 			return;
 		}
@@ -53,10 +53,10 @@ function parseMarkdown( src, options ) {
 			"</a> " + parsedText + "</h" + item.depth + ">";
 
 		if ( options.generateToc ) {
-			toc += new Array( (item.depth - 1) * 2 + 1 ).join( " " ) + "* " +
+			toc += new Array( ( item.depth - 1 ) * 2 + 1 ).join( " " ) + "* " +
 				"[" + item.tocText + "](#" + item.tocId + ")\n";
 		}
-	});
+	} );
 
 	if ( options.generateToc ) {
 		tokens = marked.lexer( toc ).concat( tokens );
@@ -85,7 +85,7 @@ function eachFile( files, stepFn, complete ) {
 		}
 
 		complete( null, count );
-	});
+	} );
 }
 
 exports.htmlEscape = htmlEscape;