Updated credentials storage so there is a .._cred.... file per flow.

Allows swapping flows more easily without having to re-enter credentials.
Thus also added *_cred* to .gitignore

red/storage/localfilesystem.js

@@ -1,5 +1,5 @@
 /**
- * Copyright 2013 IBM Corp.
+ * Copyright 2013, 2014 IBM Corp.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,7 +28,7 @@ var settings;
 var flowsFile;
 var flowsFullPath;
 var credentialsFile;
-
+var oldCredentialsFile;
 var userDir;
 var libDir;
 var libFlowsDir;
@@ -56,7 +56,6 @@ function listFiles(dir) {
 
 function getFileMeta(root,path) {
     var fn = fspath.join(root,path);
-    
     var fd = fs.openSync(fn,"r");
     var size = fs.fstatSync(fd).size;
     var meta = {};
@@ -84,6 +83,7 @@ function getFileMeta(root,path) {
     fs.closeSync(fd);
     return meta;
 }
+
 function getFileBody(root,path) {
     var body = "";
     var fn = fspath.join(root,path);
@@ -130,9 +130,9 @@ function writeFile(root,path,meta,body,res) {
     }
     mkdirp(fspath.dirname(fn), function (err) {
         fs.writeFile(fn,headers+body,function(err) {
-                //TODO: handle error
-                res.writeHead(204, {'Content-Type': 'text/plain'});
-                res.end();
+            //TODO: handle error
+            res.writeHead(204, {'Content-Type': 'text/plain'});
+            res.end();
         });
     });
 }
@@ -141,7 +141,7 @@ var localfilesystem = {
     init: function(_settings) {
         settings = _settings;
         userDir = settings.userDir || process.env.NODE_RED_HOME;
-        
+
         if (settings.flowFile) {
             flowsFile = settings.flowFile;
             flowsFullPath = flowsFile;
@@ -149,13 +149,16 @@ var localfilesystem = {
             flowsFile = 'flows_'+require('os').hostname()+'.json';
             flowsFullPath = fspath.join(userDir,flowsFile);
         }
-        credentialsFile = fspath.join(userDir,"credentials.json");
-        
+        var fsext = fspath.extname(flowsFile);
+        credentialsFile = fspath.join(userDir,fspath.basename(flowsFile,fsext)+"_cred"+fsext);
+        oldCredentialsFile = fspath.join(userDir,"credentials.json");
+
         libDir = fspath.join(userDir,"lib");
         libFlowsDir = fspath.join(libDir,"flows");
 
         return promiseDir(libFlowsDir);
     },
+
     getFlows: function() {
         var defer = when.defer();
         fs.exists(flowsFullPath, function(exists) {
@@ -171,10 +174,11 @@ var localfilesystem = {
         });
         return defer.promise;
     },
+
     saveFlows: function(flows) {
         return nodeFn.call(fs.writeFile, flowsFullPath, JSON.stringify(flows));
     },
-    
+
     getCredentials: function() {
         var defer = when.defer();
         fs.exists(credentialsFile, function(exists) {
@@ -183,23 +187,30 @@ var localfilesystem = {
                     return JSON.parse(data)
                 }));
             } else {
-                defer.resolve({});
+                fs.exists(oldCredentialsFile, function(exists) {
+                    if (exists) {
+                        defer.resolve(nodeFn.call(fs.readFile, oldCredentialsFile, 'utf8').then(function(data) {
+                            return JSON.parse(data)
+                        }));
+                    } else {
+                        defer.resolve({});
+                    }
+                });
             }
         });
         return defer.promise;
     },
-    
+
     saveCredentials: function(credentials) {
         return nodeFn.call(fs.writeFile, credentialsFile, JSON.stringify(credentials))
     },
-    
+
     getAllFlows: function() {
         return listFiles(libFlowsDir);
     },
-    
+
     getFlow: function(fn) {
         var defer = when.defer();
-        
         var file = fspath.join(libFlowsDir,fn+".json");
         fs.exists(file, function(exists) {
             if (exists) {
@@ -208,24 +219,22 @@ var localfilesystem = {
                 defer.reject();
             }
         });
-        
         return defer.promise;
     },
-    
+
     saveFlow: function(fn,data) {
         var file = fspath.join(libFlowsDir,fn+".json");
         return promiseDir(fspath.dirname(file)).then(function () {
             return nodeFn.call(fs.writeFile, file, data);
         });
     },
-    
+
     getLibraryEntry: function(type,path) {
         var root = fspath.join(libDir,type);
         var rootPath = fspath.join(libDir,type,path);
         return promiseDir(root).then(function () {
             return nodeFn.call(fs.lstat, rootPath).then(function(stats) {
                 if (stats.isFile()) return getFileBody(root,path);
-
                 if (path.substr(-1) == '/') {
                     path = path.substr(0,path.length-1);
                 }
@@ -245,21 +254,19 @@ var localfilesystem = {
                                 files.push(meta);
                             }
                         }
-                            
                     });
                     return dirs.concat(files);
                 });
             });
         });
     },
+
     saveLibraryEntry: function(type,path,meta,body) {
         var fn = fspath.join(libDir, type, path);
-
         var headers = "";
         for (var i in meta) {
             headers += "// "+i+": "+meta[i]+"\n";
         }
-
         return promiseDir(fspath.dirname(fn)).then(function () {
             nodeFn.call(fs.writeFile, fn, headers+body);
         });