1 files changed, 63 insertions, 0 deletions
diff --git a/powerline/lint/inspect.py b/powerline/lint/inspect.py
new file mode 100644
index 0000000..15bb610
--- /dev/null
+++ b/powerline/lint/inspect.py
@@ -0,0 +1,63 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+from inspect import ArgSpec, getargspec
+
+from powerline.segments import Segment
+
+
+def getconfigargspec(obj):
+	if hasattr(obj, 'powerline_origin'):
+		obj = obj.powerline_origin
+	else:
+		obj = obj
+
+	args = []
+	defaults = []
+
+	if isinstance(obj, Segment):
+		additional_args = obj.additional_args()
+		argspecobjs = obj.argspecobjs()
+		get_omitted_args = obj.omitted_args
+	else:
+		additional_args = ()
+		argspecobjs = ((None, obj),)
+		get_omitted_args = lambda *args: ()
+
+	for arg in additional_args:
+		args.append(arg[0])
+		if len(arg) > 1:
+			defaults.append(arg[1])
+
+	requires_segment_info = hasattr(obj, 'powerline_requires_segment_info')
+	requires_filesystem_watcher = hasattr(obj, 'powerline_requires_filesystem_watcher')
+
+	for name, method in argspecobjs:
+		argspec = getargspec(method)
+		omitted_args = get_omitted_args(name, method)
+		largs = len(argspec.args)
+		for i, arg in enumerate(reversed(argspec.args)):
+			if (
+				largs - (i + 1) in omitted_args
+				or arg in omitted_args
+				or arg == 'pl'
+				or arg == 'self'
+				or (arg == 'create_watcher' and requires_filesystem_watcher)
+				or (arg == 'segment_info' and requires_segment_info)
+			):
+				continue
+			if argspec.defaults and len(argspec.defaults) > i:
+				if arg in args:
+					idx = args.index(arg)
+					if len(args) - idx > len(defaults):
+						args.pop(idx)
+					else:
+						continue
+				default = argspec.defaults[-(i + 1)]
+				defaults.append(default)
+				args.append(arg)
+			else:
+				if arg not in args:
+					args.insert(0, arg)
+
+	return ArgSpec(args=args, varargs=None, keywords=None, defaults=tuple(defaults))