Merge pull request #136 from AbdealiJK/ajk/setup

setup.py: Don't fail if pip fails in cmake err msg

setup.py

@@ -468,15 +468,19 @@ class build(_build):
                         message = msg_pkgmanager.format('OSX', manager)
                         break
             elif sys.platform.startswith('linux'):
-                distname = None
                 try:
                     import distro
-                except ImportError:
+                except ImportError as err:
                     import pip
-                    pip_exit = pip.main(['install', 'distro'])
+                    pip_exit = pip.main(['install', '-q', 'distro'])
                     if pip_exit > 0:
-                        raise SystemExit('Pip was unable to install `distro`')
+                        log.debug("Unable to install `distro` to identify "
+                                  "the recommended command. Falling back "
+                                  "to default error message.")
+                        distro = err
+                    else:
                         import distro
+                if not isinstance(distro, ImportError):
                     distname = distro.id()
                     if distname in ('debian', 'ubuntu'):
                         message = msg_pkgmanager.format(