[rpms/fedpkg] 1.48-1: Backport: Fix argparse error in Python 3

[Chenxiong Qi <cqi@redhat.com>]

            A new commit has been pushed.

            Repo   : rpms/fedpkg
            Branch : 1.48-1
            Commit : 9c6511d602da36403b5b1374fa78802dc0a657ec
            Author : Chenxiong Qi <cqi@redhat.com>
            Date   : 2018-05-22T20:29:22+08:00
            Stats  : +46/-2 in 2 file(s)
            URL    : https://src.fedoraproject.org/rpms/fedpkg/c/9c6511d602da36403b5b1374fa78802dc0a657ec?branch=1.48-1

            Log:
            Backport: Fix argparse error in Python 3

Signed-off-by: Chenxiong Qi <cqi@redhat.com>

---
diff --git a/0001-Fix-argparse-error-in-Python-3.patch b/0001-Fix-argparse-error-in-Python-3.patch
new file mode 100644
index 0000000..8226cf1
--- /dev/null
+++ b/0001-Fix-argparse-error-in-Python-3.patch
@@ -0,0 +1,39 @@
+From 4ee70510c86469b2b1f910ad85844e7bce9b94a8 Mon Sep 17 00:00:00 2001
+From: Chenxiong Qi <cqi@redhat.com>
+Date: Mon, 21 May 2018 23:22:59 +0800
+Subject: [PATCH] Fix argparse error in Python 3
+
+argparse behaves differently in Python 2 and 3 when no options and
+arguments are passed to executable fedpkg. That causes no attribute
+named command is set to parsed namespace object in Python 3. Command
+line help message has to be output explicitly.
+
+Fixes #221
+
+Signed-off-by: Chenxiong Qi <cqi@redhat.com>
+---
+ fedpkg/__main__.py | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/fedpkg/__main__.py b/fedpkg/__main__.py
+index e12f255..c7ea14c 100644
+--- a/fedpkg/__main__.py
++++ b/fedpkg/__main__.py
+@@ -57,6 +57,14 @@ def main():
+     client.do_imports(site='fedpkg')
+     client.parse_cmdline()
+ 
++    # This is due to a difference argparse behavior to Python 2 version.
++    # In Python 3, argparse will proceed to here without reporting
++    # "too few arguments". Instead, client.args does not have attribute
++    # command.
++    if not hasattr(client.args, 'command'):
++        client.parser.print_help()
++        sys.exit(1)
++
+     if not client.args.path:
+         try:
+             client.args.path = pyrpkg.utils.getcwd()
+-- 
+2.14.3
+

diff --git a/fedpkg.spec b/fedpkg.spec
index f0ed754..166aad2 100644
--- a/fedpkg.spec
+++ b/fedpkg.spec
@@ -5,12 +5,13 @@
 
 Name:           fedpkg
 Version:        1.33
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Fedora utility for working with dist-git
 
 License:        GPLv2+
 URL:            https://pagure.io/fedpkg
 Source0:        https://pagure.io/releases/fedpkg/%{name}-%{version}.tar.bz2
+Patch0:         0001-Fix-argparse-error-in-Python-3.patch
 
 BuildArch:      noarch
 
@@ -102,6 +103,7 @@ Provides the fedpkg command for working with dist-git
 
 %prep
 %setup -q
+%patch0 -p1
 
 %build
 %py_build
@@ -147,8 +149,11 @@ nosetests
 
 
 %changelog
+* Tue May 22 2018 Chenxiong Qi <cqi@redhat.com> 1.33-3
+- Backport: Fix argparse error in Python 3
+
 * Mon May 21 2018 Chenxiong Qi <cqi@redhat.com> 1.33-2
-* Require python2-rpkg-1.54-2 as minimum version
+- Require python2-rpkg-1.54-2 as minimum version
 
 * Mon May 14 2018 Chenxiong Qi <cqi@redhat.com> - 1.33-1
 - Allow running tests against specified rpkg (cqi)