From 6ea694f7d771010c8af3ce2a4802e374ad39fa25 Mon Sep 17 00:00:00 2001
From: KOLANICH <kolan_n@mail.ru>
Date: Tue, 5 Dec 2017 14:02:16 +0300
Subject: [PATCH] Added main module detection and command line construction,
 now should show the right name (instead of __main__.py) when called for
 modules

Co-Authored-By: Henry Fredrick Schreiner <henry.fredrick.schreiner@cern.ch>
---
 plumbum/cli/application.py | 10 ++++++++--
 plumbum/lib.py             |  9 +++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/plumbum/cli/application.py b/plumbum/cli/application.py
index cb5e1fad3..e170286bc 100644
--- a/plumbum/cli/application.py
+++ b/plumbum/cli/application.py
@@ -2,10 +2,11 @@
 import os
 import sys
 import functools
+import re
 from textwrap import TextWrapper
 from collections import defaultdict
 
-from plumbum.lib import six, getdoc
+from plumbum.lib import six, getdoc, get_main_module_frame
 from .terminal import get_terminal_size
 from .switches import (SwitchError, UnknownSwitch, MissingArgument,
                        WrongArgumentType, MissingMandatorySwitch,
@@ -68,6 +69,7 @@ def __repr__(self):
 # CLI Application base class
 #===================================================================================================
 
+main_module_ending_rx = re.compile("\.__main__$")
 
 class Application(object):
     """The base class for CLI applications; your "entry point" class should derive from it,
@@ -166,7 +168,11 @@ def __init__(self, executable):
         # Filter colors
 
         if self.PROGNAME is None:
-            self.PROGNAME = os.path.basename(executable)
+            spec = get_main_module_frame().f_globals.get("__spec__", None)
+            if spec:
+                self.PROGNAME = " ".join(("python -m", main_module_ending_rx.sub("", spec.name)))
+            else:
+                self.PROGNAME = os.path.basename(executable)
         elif isinstance(self.PROGNAME, colors._style):
             self.PROGNAME = self.PROGNAME | os.path.basename(executable)
         elif colors.filter(self.PROGNAME) == '':
diff --git a/plumbum/lib.py b/plumbum/lib.py
index b9404f24a..5ac15d8ca 100644
--- a/plumbum/lib.py
+++ b/plumbum/lib.py
@@ -161,3 +161,12 @@ def read_fd_decode_safely(fd, size=4096):
             if i == 3:
                 raise
             data += os.read(fd.fileno(), 1)
+
+def get_main_module_frame():
+    """
+    Gets the frame of the __main__ module (the one which is called with command line) of an app.
+    """
+    fr = sys._getframe(0)
+    while fr and fr.f_globals["__name__"] != "__main__":
+        fr = fr.f_back
+    return fr