From 6e4eae372dca57041586cda5fdfe8294ebfe9f16 Mon Sep 17 00:00:00 2001
From: Conor Scott <conor.r.scott.88@gmail.com>
Date: Tue, 5 Feb 2019 10:46:47 +1030
Subject: [PATCH] [pylightning] add args list to getmanifest

[ Shamelessly stolen by Rusty, tweaked parameter name ]
---
 contrib/pylightning/lightning/plugin.py | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/contrib/pylightning/lightning/plugin.py b/contrib/pylightning/lightning/plugin.py
index 033f1cdfd..2b7a46558 100644
--- a/contrib/pylightning/lightning/plugin.py
+++ b/contrib/pylightning/lightning/plugin.py
@@ -306,9 +306,20 @@ class Plugin(object):
                 doc = "Undocumented RPC method from a plugin."
             doc = re.sub('\n+', ' ', doc)
 
+            argspec = inspect.getargspec(func)
+            args = argspec.args[1:]
+            defaults = argspec.defaults
+
+            # Make optional args be surrounded by square brackets
+            # list regular lightning-cli commands args
+            if defaults:
+                for idx in range(-len(defaults), 0):
+                    args[idx] = '[' + args[idx] + ']'
+
             methods.append({
                 'name': name,
-                'description': doc,
+                'usage': " ".join(args),
+                'description': doc
             })
 
         return {