From eb6da09ea370cf6c96003922191c09735cdb6e22 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Jun=C3=A1k?= <pjunak@localhost.localdomain>
Date: Thu, 13 Sep 2018 11:34:10 +0200
Subject: [PATCH] [mockbuild] create custom error message for dnf-utils not
 being installed

Created new exception for absent weak dependent package.
Added custom message for error caused by dnf utils not being installed.

bugzilla url:
https://bugzilla.redhat.com/show_bug.cgi?id=1626879
---
 mock/py/mockbuild/exception.py       |  1 +
 mock/py/mockbuild/package_manager.py | 18 +++++++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/mock/py/mockbuild/exception.py b/mock/py/mockbuild/exception.py
index dadf5c4da..6d5a62719 100644
--- a/mock/py/mockbuild/exception.py
+++ b/mock/py/mockbuild/exception.py
@@ -41,6 +41,7 @@ def __str__(self):
 # 70 = result dir could not be created
 # 80 = unshare of namespace failed
 # 110 = unbalanced call to state functions
+# 120 = weak dependent package not installed
 
 class BuildError(Error):
     "rpmbuild failed."
diff --git a/mock/py/mockbuild/package_manager.py b/mock/py/mockbuild/package_manager.py
index 7a58d6ea2..fc5810159 100644
--- a/mock/py/mockbuild/package_manager.py
+++ b/mock/py/mockbuild/package_manager.py
@@ -5,6 +5,7 @@
 import glob
 import os.path
 import shutil
+import sys
 from textwrap import dedent
 
 import distro
@@ -156,7 +157,22 @@ def update(self, *args, **kwargs):
     # pylint: disable=unused-argument
     @traceLog()
     def builddep(self, *args, **kwargs):
-        return self.execute('builddep', returnOutput=1, *args)
+        try:
+            result = self.execute('builddep', returnOutput=1, *args)
+        except (FileNotFoundError) as error:
+            er = str(error)
+            if "builddep" in er:
+                print(error)
+                print("""
+Error:      dnf-utils is not installed. Dnf-utils is needed to complete this action.
+            To install dnf-utils use one of the commands below:
+            $ dnf install dnf-utils
+            or
+            $ yum install dnf-utils""")
+                sys.exit(120)
+            else:
+                raise
+        return result
 
     @traceLog()
     def copy_gpg_keys(self):