lib: fix style issues after eslint update

With an indentation style of two spaces, it is not possible to indent
multiline variable declarations by four spaces. Instead, the var keyword
is used on every new line.
Use const instead of var where applicable for changed lines.

PR-URL: nodejs#2286
Reviewed-By: Roman Reiss <me@silverwind.io>

lib/_debugger.js

@@ -25,8 +25,8 @@ exports.start = function(argv, stdin, stdout) {
   stdin = stdin || process.stdin;
   stdout = stdout || process.stdout;
 
-  var args = ['--debug-brk'].concat(argv),
-      interface_ = new Interface(stdin, stdout, args);
+  const args = ['--debug-brk'].concat(argv);
+  const interface_ = new Interface(stdin, stdout, args);
 
   stdin.resume();
 
@@ -197,8 +197,8 @@ Client.prototype._removeScript = function(desc) {
 
 
 Client.prototype._onResponse = function(res) {
-  var cb,
-      index = -1;
+  var cb;
+  var index = -1;
 
   this._reqCallbacks.some(function(fn, i) {
     if (fn.request_seq == res.body.request_seq) {
@@ -295,11 +295,11 @@ Client.prototype.reqLookup = function(refs, cb) {
 };
 
 Client.prototype.reqScopes = function(cb) {
-  var self = this,
-      req = {
-        command: 'scopes',
-        arguments: {}
-      };
+  const self = this;
+  const req = {
+    command: 'scopes',
+    arguments: {}
+  };
 
   cb = cb || function() {};
   this.req(req, function(err, res) {
@@ -525,8 +525,8 @@ Client.prototype.mirrorObject = function(handle, depth, cb) {
         return;
       }
 
-      var mirror,
-          waiting = 1;
+      var mirror;
+      var waiting = 1;
 
       if (handle.className == 'Array') {
         mirror = [];
@@ -676,8 +676,8 @@ var helpMessage = 'Commands: ' + commands.map(function(group) {
 function SourceUnderline(sourceText, position, repl) {
   if (!sourceText) return '';
 
-  var head = sourceText.slice(0, position),
-      tail = sourceText.slice(position);
+  const head = sourceText.slice(0, position);
+  var tail = sourceText.slice(position);
 
   // Colourize char if stdout supports colours
   if (repl.useColors) {
@@ -697,8 +697,8 @@ function SourceInfo(body) {
 
   if (body.script) {
     if (body.script.name) {
-      var name = body.script.name,
-          dir = path.resolve() + '/';
+      var name = body.script.name;
+      const dir = path.resolve() + '/';
 
       // Change path to relative, if possible
       if (name.indexOf(dir) === 0) {
@@ -969,8 +969,8 @@ Interface.prototype.controlEval = function(code, context, filename, callback) {
 Interface.prototype.debugEval = function(code, context, filename, callback) {
   if (!this.requireConnection()) return;
 
-  var self = this,
-      client = this.client;
+  const self = this;
+  const client = this.client;
 
   // Repl asked for scope variables
   if (code === '.scope') {
@@ -1004,9 +1004,9 @@ Interface.prototype.debugEval = function(code, context, filename, callback) {
 // Adds spaces and prefix to number
 // maxN is a maximum number we should have space for
 function leftPad(n, prefix, maxN) {
-  var s = n.toString(),
-      nchars = Math.max(2, String(maxN).length) + 1,
-      nspaces = nchars - s.length - 1;
+  const s = n.toString();
+  const nchars = Math.max(2, String(maxN).length) + 1;
+  const nspaces = nchars - s.length - 1;
 
   for (var i = 0; i < nspaces; i++) {
     prefix += ' ';
@@ -1078,10 +1078,10 @@ Interface.prototype.list = function(delta) {
 
   delta || (delta = 5);
 
-  var self = this,
-      client = this.client,
-      from = client.currentSourceLine - delta + 1,
-      to = client.currentSourceLine + delta + 1;
+  const self = this;
+  const client = this.client;
+  const from = client.currentSourceLine - delta + 1;
+  const to = client.currentSourceLine + delta + 1;
 
   self.pause();
   client.reqSource(from, to, function(err, res) {
@@ -1096,12 +1096,12 @@ Interface.prototype.list = function(delta) {
       var lineno = res.fromLine + i + 1;
       if (lineno < from || lineno > to) continue;
 
-      var current = lineno == 1 + client.currentSourceLine,
-          breakpoint = client.breakpoints.some(function(bp) {
-            return (bp.scriptReq === client.currentScript ||
-                    bp.script === client.currentScript) &&
-                    bp.line == lineno;
-          });
+      const current = lineno == 1 + client.currentSourceLine;
+      const breakpoint = client.breakpoints.some(function(bp) {
+        return (bp.scriptReq === client.currentScript ||
+                bp.script === client.currentScript) &&
+                bp.line == lineno;
+      });
 
       if (lineno == 1) {
         // The first line needs to have the module wrapper filtered out of
@@ -1139,8 +1139,8 @@ Interface.prototype.list = function(delta) {
 Interface.prototype.backtrace = function() {
   if (!this.requireConnection()) return;
 
-  var self = this,
-      client = this.client;
+  const self = this;
+  const client = this.client;
 
   self.pause();
   client.fullTrace(function(err, bt) {
@@ -1153,8 +1153,8 @@ Interface.prototype.backtrace = function() {
     if (bt.totalFrames == 0) {
       self.print('(empty stack)');
     } else {
-      var trace = [],
-          firstFrameNative = bt.frames[0].script.isNative;
+      const trace = [];
+      const firstFrameNative = bt.frames[0].script.isNative;
 
       for (var i = 0; i < bt.frames.length; i++) {
         var frame = bt.frames[i];
@@ -1183,9 +1183,9 @@ Interface.prototype.backtrace = function() {
 Interface.prototype.scripts = function() {
   if (!this.requireConnection()) return;
 
-  var client = this.client,
-      displayNatives = arguments[0] || false,
-      scripts = [];
+  const client = this.client;
+  const displayNatives = arguments[0] || false;
+  const scripts = [];
 
   this.pause();
   for (var id in client.scripts) {
@@ -1323,9 +1323,9 @@ Interface.prototype.setBreakpoint = function(script, line,
                                              condition, silent) {
   if (!this.requireConnection()) return;
 
-  var self = this,
-      scriptId,
-      ambiguous;
+  const self = this;
+  var scriptId;
+  var ambiguous;
 
   // setBreakpoint() should insert breakpoint on current line
   if (script === undefined) {
@@ -1429,10 +1429,10 @@ Interface.prototype.setBreakpoint = function(script, line,
 Interface.prototype.clearBreakpoint = function(script, line) {
   if (!this.requireConnection()) return;
 
-  var ambiguous,
-      breakpoint,
-      scriptId,
-      index;
+  var ambiguous;
+  var breakpoint;
+  var scriptId;
+  var index;
 
   this.client.breakpoints.some(function(bp, i) {
     if (bp.scriptId === script ||
@@ -1474,10 +1474,8 @@ Interface.prototype.clearBreakpoint = function(script, line) {
     return this.error('Breakpoint not found on line ' + line);
   }
 
-  var self = this,
-      req = {
-        breakpoint: breakpoint
-      };
+  var self = this;
+  const req = {breakpoint};
 
   self.pause();
   self.client.clearBreakpoint(req, function(err, res) {
@@ -1513,8 +1511,8 @@ Interface.prototype.breakpoints = function() {
 Interface.prototype.pause_ = function() {
   if (!this.requireConnection()) return;
 
-  var self = this,
-      cmd = 'process._debugPause();';
+  const self = this;
+  const cmd = 'process._debugPause();';
 
   this.pause();
   this.client.reqFrameEval(cmd, NO_FRAME, function(err, res) {
@@ -1621,11 +1619,11 @@ Interface.prototype.killChild = function() {
 
 // Spawns child process (and restores breakpoints)
 Interface.prototype.trySpawn = function(cb) {
-  var self = this,
-      breakpoints = this.breakpoints || [],
-      port = exports.port,
-      host = '127.0.0.1',
-      childArgs = this.args;
+  const self = this;
+  const breakpoints = this.breakpoints || [];
+  var port = exports.port;
+  var host = '127.0.0.1';
+  var childArgs = this.args;
 
   this.killChild();
   assert(!this.child);
@@ -1676,8 +1674,8 @@ Interface.prototype.trySpawn = function(cb) {
 
   this.pause();
 
-  var client = self.client = new Client(),
-      connectionAttempts = 0;
+  const client = self.client = new Client();
+  var connectionAttempts = 0;
 
   client.once('ready', function() {
     self.stdout.write(' ok\n');

lib/_http_server.js

@@ -64,7 +64,7 @@ const STATUS_CODES = exports.STATUS_CODES = {
   426 : 'Upgrade Required',           // RFC 2817
   428 : 'Precondition Required',      // RFC 6585
   429 : 'Too Many Requests',          // RFC 6585
-  431 : 'Request Header Fields Too Large',// RFC 6585
+  431 : 'Request Header Fields Too Large', // RFC 6585
   500 : 'Internal Server Error',
   501 : 'Not Implemented',
   502 : 'Bad Gateway',

lib/_tls_legacy.js

@@ -224,9 +224,9 @@ CryptoStream.prototype._write = function write(data, encoding, cb) {
 
 
 CryptoStream.prototype._writePending = function writePending() {
-  var data = this._pending,
-      encoding = this._pendingEncoding,
-      cb = this._pendingCallback;
+  const data = this._pending;
+  const encoding = this._pendingEncoding;
+  const cb = this._pendingCallback;
 
   this._pending = null;
   this._pendingEncoding = '';
@@ -252,9 +252,9 @@ CryptoStream.prototype._read = function read(size) {
     out = this.pair.ssl.encOut;
   }
 
-  var bytesRead = 0,
-      start = this._buffer.offset,
-      last = start;
+  var bytesRead = 0;
+  const start = this._buffer.offset;
+  var last = start;
   do {
     assert(last === this._buffer.offset);
     var read = this._buffer.use(this.pair.ssl, out, size - bytesRead);
@@ -604,8 +604,8 @@ function onhandshakedone() {
 
 
 function onclienthello(hello) {
-  var self = this,
-      once = false;
+  const self = this;
+  var once = false;
 
   this._resumingSession = true;
   function callback(err, session) {

lib/_tls_wrap.js

@@ -397,8 +397,8 @@ TLSSocket.prototype._init = function(socket, wrap) {
 
   // For clients, we will always have either a given ca list or be using
   // default one
-  var requestCert = !!options.requestCert || !options.isServer,
-      rejectUnauthorized = !!options.rejectUnauthorized;
+  const requestCert = !!options.requestCert || !options.isServer;
+  const rejectUnauthorized = !!options.rejectUnauthorized;
 
   this._requestCert = requestCert;
   this._rejectUnauthorized = rejectUnauthorized;
@@ -494,8 +494,8 @@ TLSSocket.prototype._init = function(socket, wrap) {
 };
 
 TLSSocket.prototype.renegotiate = function(options, callback) {
-  var requestCert = this._requestCert,
-      rejectUnauthorized = this._rejectUnauthorized;
+  var requestCert = this._requestCert;
+  var rejectUnauthorized = this._rejectUnauthorized;
 
   if (this.destroyed)
     return;
@@ -966,9 +966,9 @@ exports.connect = function(/* [port, host], options, cb */) {
   var hostname = options.servername ||
                  options.host ||
                  (options.socket && options.socket._host) ||
-                 'localhost',
-      NPN = {},
-      context = tls.createSecureContext(options);
+                 'localhost';
+  const NPN = {};
+  const context = tls.createSecureContext(options);
   tls.convertNPNProtocols(options.NPNProtocols, NPN);
 
   var socket = new TLSSocket(options.socket, {

lib/assert.js

@@ -198,18 +198,18 @@ function objEquiv(a, b, strict) {
     return a === b;
   if (strict && Object.getPrototypeOf(a) !== Object.getPrototypeOf(b))
     return false;
-  var aIsArgs = isArguments(a),
-      bIsArgs = isArguments(b);
+  const aIsArgs = isArguments(a);
+  const bIsArgs = isArguments(b);
   if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
     return false;
   if (aIsArgs) {
     a = pSlice.call(a);
     b = pSlice.call(b);
     return _deepEqual(a, b, strict);
   }
-  var ka = Object.keys(a),
-      kb = Object.keys(b),
-      key, i;
+  const ka = Object.keys(a);
+  const kb = Object.keys(b);
+  var key, i;
   // having the same number of owned properties (keys incorporates
   // hasOwnProperty)
   if (ka.length !== kb.length)

lib/fs.js

@@ -552,8 +552,8 @@ fs.openSync = function(path, flags, mode) {
 fs.read = function(fd, buffer, offset, length, position, callback) {
   if (!(buffer instanceof Buffer)) {
     // legacy string interface (fd, length, position, encoding, callback)
-    var cb = arguments[4],
-        encoding = arguments[3];
+    const cb = arguments[4];
+    const encoding = arguments[3];
 
     assertEncoding(encoding);
 
@@ -1388,9 +1388,9 @@ fs.realpathSync = function realpathSync(p, cache) {
     return cache[p];
   }
 
-  var original = p,
-      seenLinks = {},
-      knownHard = {};
+  const original = p;
+  const seenLinks = {};
+  const knownHard = {};
 
   // current character position in p
   var pos;
@@ -1490,9 +1490,9 @@ fs.realpath = function realpath(p, cache, cb) {
     return process.nextTick(cb.bind(null, null, cache[p]));
   }
 
-  var original = p,
-      seenLinks = {},
-      knownHard = {};
+  const original = p;
+  const seenLinks = {};
+  const knownHard = {};
 
   // current character position in p
   var pos;
@@ -1941,9 +1941,9 @@ util.inherits(SyncWriteStream, Stream);
 
 // Export
 Object.defineProperty(fs, 'SyncWriteStream', {
-    configurable: true,
-    writable: true,
-    value: SyncWriteStream
+  configurable: true,
+  writable: true,
+  value: SyncWriteStream
 });
 
 SyncWriteStream.prototype.write = function(data, arg1, arg2) {