Add "--json-output" option to "platformio list", "platformio serialports list" and "platformio lib list" cmds // Resolve #42

docs/userguide/cmd_list.rst

@@ -10,7 +10,7 @@ Usage
 
 .. code-block:: bash
 
-    platformio list
+    platformio list [OPTIONS]
 
 
 Description
@@ -18,6 +18,13 @@ Description
 
 List installed :ref:`Platforms <platforms>`
 
+Options
+~~~~~~~
+
+.. option::
+    --json-output
+
+Return the output in `JSON <http://en.wikipedia.org/wiki/JSON>`_ format
 
 Examples
 --------

docs/userguide/cmd_serialports.rst

@@ -13,7 +13,7 @@ Usage
 
 .. code-block:: bash
 
-    platformio serialports list
+    platformio serialports list [OPTIONS]
 
 
 Description
@@ -21,6 +21,14 @@ Description
 
 List available `Serial Ports <http://en.wikipedia.org/wiki/Serial_port>`_
 
+Options
+~~~~~~~
+
+.. option::
+    --json-output
+
+Return the output in `JSON <http://en.wikipedia.org/wiki/JSON>`_ format
+
 
 Examples
 ~~~~~~~~

docs/userguide/lib/cmd_list.rst

@@ -10,7 +10,7 @@ Usage
 
 .. code-block:: bash
 
-    platformio lib list
+    platformio lib list [OPTIONS]
 
 
 Description
@@ -18,6 +18,13 @@ Description
 
 List installed libraries
 
+Options
+~~~~~~~
+
+.. option::
+    --json-output
+
+Return the output in `JSON <http://en.wikipedia.org/wiki/JSON>`_ format
 
 Examples
 --------