Migrate from path.exists to fs.exists

Compatibility is kept for path.exists. Versions of node that have
made the change will use fs.exists, while older versions will fall
back to path.exists. The same goes for path.existsSync.

examples/blocks.coffee

@@ -8,7 +8,7 @@ get '/hello', ->
 # Append.
 append = (location, data) ->
   path = new Pathname location
-  throw new Error("Location does not exist") unless path.exists()
+  throw new Error("Location does not exist") unless fs.exists()
 
   File.open path, 'a', (file) ->
     file.console.log YAML.dump data
@@ -31,7 +31,7 @@ File.open = (path, mode, block) ->
 # Write.
 write = (location, data) ->
   path = new Pathname location
-  raise "Location does not exist" unless path.exists()
+  raise "Location does not exist" unless fs.exists()
 
   File.open path, 'w', (file) ->
     return false if Digest.MD5.hexdigest(file.read()) is data.hash()

lib/coffee-script/cake.js

@@ -1,6 +1,6 @@
 // Generated by CoffeeScript 1.3.3
 (function() {
-  var CoffeeScript, cakefileDirectory, fatalError, fs, helpers, missingTask, oparse, options, optparse, path, printTasks, switches, tasks;
+  var CoffeeScript, cakefileDirectory, existsSync, fatalError, fs, helpers, missingTask, oparse, options, optparse, path, printTasks, switches, tasks;
 
   fs = require('fs');
 
@@ -12,6 +12,8 @@
 
   CoffeeScript = require('./coffee-script');
 
+  existsSync = fs.existsSync || path.existsSync;
+
   tasks = {};
 
   options = {};
@@ -98,7 +100,7 @@
 
   cakefileDirectory = function(dir) {
     var parent;
-    if (path.existsSync(path.join(dir, 'Cakefile'))) {
+    if (existsSync(path.join(dir, 'Cakefile'))) {
       return dir;
     }
     parent = path.normalize(path.join(dir, '..'));

lib/coffee-script/command.js

@@ -1,6 +1,6 @@
 // Generated by CoffeeScript 1.3.3
 (function() {
-  var BANNER, CoffeeScript, EventEmitter, SWITCHES, compileJoin, compileOptions, compilePath, compileScript, compileStdio, exec, forkNode, fs, helpers, hidden, joinTimeout, lint, loadRequires, notSources, optionParser, optparse, opts, outputPath, parseOptions, path, printLine, printTokens, printWarn, removeSource, sourceCode, sources, spawn, timeLog, unwatchDir, usage, version, wait, watch, watchDir, watchers, writeJs, _ref;
+  var BANNER, CoffeeScript, EventEmitter, SWITCHES, compileJoin, compileOptions, compilePath, compileScript, compileStdio, exec, exists, forkNode, fs, helpers, hidden, joinTimeout, lint, loadRequires, notSources, optionParser, optparse, opts, outputPath, parseOptions, path, printLine, printTokens, printWarn, removeSource, sourceCode, sources, spawn, timeLog, unwatchDir, usage, version, wait, watch, watchDir, watchers, writeJs, _ref;
 
   fs = require('fs');
 
@@ -16,6 +16,8 @@
 
   EventEmitter = require('events').EventEmitter;
 
+  exists = fs.exists || path.exists;
+
   helpers.extend(CoffeeScript, new EventEmitter);
 
   printLine = function(line) {
@@ -372,8 +374,8 @@
     sourceCode.splice(index, 1);
     if (removeJs && !opts.join) {
       jsPath = outputPath(source, base);
-      return path.exists(jsPath, function(exists) {
-        if (exists) {
+      return exists(jsPath, function(itExists) {
+        if (itExists) {
           return fs.unlink(jsPath, function(err) {
             if (err && err.code !== 'ENOENT') {
               throw err;
@@ -410,8 +412,8 @@
         }
       });
     };
-    return path.exists(jsDir, function(exists) {
-      if (exists) {
+    return exists(jsDir, function(itExists) {
+      if (itExists) {
         return compile();
       } else {
         return exec("mkdir -p " + jsDir, compile);

src/cake.coffee

@@ -13,6 +13,8 @@ helpers      = require './helpers'
 optparse     = require './optparse'
 CoffeeScript = require './coffee-script'
 
+existsSync   = fs.existsSync or path.existsSync
+
 # Keep track of the list of defined tasks, the accepted options, and so on.
 tasks     = {}
 options   = {}
@@ -79,7 +81,7 @@ missingTask = (task) -> fatalError "No such task: #{task}"
 # When `cake` is invoked, search in the current and all parent directories
 # to find the relevant Cakefile.
 cakefileDirectory = (dir) ->
-  return dir if path.existsSync path.join dir, 'Cakefile'
+  return dir if existsSync path.join dir, 'Cakefile'
   parent = path.normalize path.join dir, '..'
   return cakefileDirectory parent unless parent is dir
   throw new Error "Cakefile not found in #{process.cwd()}"

src/command.coffee

@@ -13,6 +13,8 @@ CoffeeScript   = require './coffee-script'
 {spawn, exec}  = require 'child_process'
 {EventEmitter} = require 'events'
 
+exists         = fs.exists or path.exists
+
 # Allow CoffeeScript to emit Node.js events.
 helpers.extend CoffeeScript, new EventEmitter
 
@@ -247,8 +249,8 @@ removeSource = (source, base, removeJs) ->
   sourceCode.splice index, 1
   if removeJs and not opts.join
     jsPath = outputPath source, base
-    path.exists jsPath, (exists) ->
-      if exists
+    exists jsPath, (itExists) ->
+      if itExists
         fs.unlink jsPath, (err) ->
           throw err if err and err.code isnt 'ENOENT'
           timeLog "removed #{source}"
@@ -274,8 +276,8 @@ writeJs = (source, js, base) ->
         printLine err.message
       else if opts.compile and opts.watch
         timeLog "compiled #{source}"
-  path.exists jsDir, (exists) ->
-    if exists then compile() else exec "mkdir -p #{jsDir}", compile
+  exists jsDir, (itExists) ->
+    if itExists then compile() else exec "mkdir -p #{jsDir}", compile
 
 # Convenience for cleaner setTimeouts.
 wait = (milliseconds, func) -> setTimeout func, milliseconds