make some arguments to graph create_embed optional

lib/api/graph.js

@@ -48,10 +48,10 @@ function snapshot(query, from, to, eventQuery, callback){
  *comment: create an embed graph of a metric query
  *params:
  *  graph_json: The request array to pass create in the embed
- *  timeframe: (1_hour, 4_hours, 1_day, 2_days, and 1_week)
- *  size: (small, medium, large, xlarge)
- *  legend: yes or no
- *  title: The title of the embed
+ *  timeframe: optional, one of ("1_hour", "4_hours", "1_day", "2_days", and "1_week")
+ *  size: optional, one of ("small", "medium", "large", "xlarge")
+ *  legend: optional, "yes" or "no"
+ *  title: optional, the title of the embed
  *  callback: function(err, res)
  *example: |
  *  ```javascript
@@ -103,7 +103,8 @@ module.exports = {
     createEmbed: createEmbed,
     getUsage: function(){
         return [
-            "  dogapi graph snapshot <query> <from> <to> [--events <event-query>]"
+          "  dogapi graph snapshot <query> <from> <to> [--events <event-query>]",
+          "  dogapi graph create_embed <graph_json> [--timeframe <timeframe>] [--size <size>] [--legend <legend>] [--title <title>]"
         ];
     },
     getHelp: function(){
@@ -111,14 +112,13 @@ module.exports = {
             "Graph:",
             "  Subcommands:",
             "    snapshot <query> <from> <to> --events <event-query>     |     take a snapshot of a graph",
-            "    create_embed --graph_json <graph_json> --timeframe <timeframe> --size <size> --legend <legend> --title <title>     |     create a new graph embed",
+            "    create_embed <graph_json> --timeframe <timeframe> --size <size> --legend <legend> --title <title>     |     create a new graph embed",
             "  Options:",
-            "    --events <event-query>                     a query for event bands to add to the snapshot",
-            "    --graph_json <graph_json> <required>       The json object to send to the DataDog",
-            "    --timeframe  <timeframe> <required>        The timeframe for the embed (1_hour, 4_hours, 1_day, 2_days, and 1_week)",
-            "    --size <size> <required>                   The size of the graph to create (small, medium, large, xlarge)",
-            "    --legend <legend> <required>               Whether or not to have a legend (yes, no)",
-            "    --title <title> <required>                 The title of the embed to create"
+            "    --events <event-query>          a query for event bands to add to the snapshot",
+            "    --timeframe  <timeframe>        The timeframe for the embed (1_hour, 4_hours, 1_day, 2_days, and 1_week)",
+            "    --size <size>                   The size of the graph to create (small, medium, large, xlarge)",
+            "    --legend <legend>               Whether or not to have a legend (yes, no)",
+            "    --title <title>                 The title of the embed to create"
 
         ];
     },
@@ -129,8 +129,8 @@ module.exports = {
             var to = parseInt(args._[6]);
             var eventQuery = args["events"];
             snapshot(query, from, to, eventQuery, callback);
-        } else if (subcommand === "create_embed") {
-            var graph_json = json.parse(args["graph_json"]);
+        } else if (args._.length > 4 && subcommand === "create_embed") {
+            var graph_json = json.parse(args._[4]);
             var timeframe = args["timeframe"];
             var size = args["size"];
             var legend = args["legend"];