From 02228ceb2110a1bc2c484ff1a715dd664740efe2 Mon Sep 17 00:00:00 2001
From: Clark Boylan <clark.boylan@gmail.com>
Date: Tue, 28 Mar 2017 10:59:47 -0700
Subject: [PATCH] Lazy import pkg_resources

pkg_resources is costly to import so don't import it until we actually
need it.

Change-Id: I2152b6b3fd47597b5af032e74a840e2f5b89c383
---
 pbr/version.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pbr/version.py b/pbr/version.py
index e7752675..474faf16 100644
--- a/pbr/version.py
+++ b/pbr/version.py
@@ -22,8 +22,6 @@ import itertools
 import operator
 import sys
 
-import pkg_resources
-
 
 def _is_int(string):
     try:
@@ -435,6 +433,9 @@ class VersionInfo(object):
         record associated with the package, and if there is no such record
         falls back to the logic sdist would use.
         """
+        # Lazy import because pkg_resources is costly to import so defer until
+        # we absolutely need it.
+        import pkg_resources
         try:
             requirement = pkg_resources.Requirement.parse(self.package)
             provider = pkg_resources.get_provider(requirement)