From 1ec857bf41fb2486fd8b486c969793af1f395af7 Mon Sep 17 00:00:00 2001
From: Lowell Alleman <lowell@kintyre.co>
Date: Fri, 21 Jun 2019 14:00:39 -0400
Subject: [PATCH 1/3] Enhance missing command detection

If a given VCS command is not executable or blocked from execution by a LSM
(SELinux/AppArmor) for example, then consider that VCS to be unavailable.
This change prevents the error:  OSError: [Error 13] Permission denied
---
 bumpversion/vcs.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/bumpversion/vcs.py b/bumpversion/vcs.py
index 5df3592..122354e 100644
--- a/bumpversion/vcs.py
+++ b/bumpversion/vcs.py
@@ -51,8 +51,8 @@ def is_usable(cls):
                 == 0
             )
         except OSError as e:
-            if e.errno == 2:
-                # mercurial is not installed then, ok.
+            if e.errno in (2, 13):
+                # VCS is not installed or permission denied then, ok.
                 return False
             raise
 

From d924c76072e5e6306a2b2d4fe3fd412cca4626d5 Mon Sep 17 00:00:00 2001
From: Lowell Alleman <lowell@kintyre.co>
Date: Mon, 24 Jun 2019 12:48:46 -0400
Subject: [PATCH 2/3] Use errno constants

- Swap hard-coded error numbers with constants from the errno module.
---
 bumpversion/vcs.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/bumpversion/vcs.py b/bumpversion/vcs.py
index 122354e..767ee06 100644
--- a/bumpversion/vcs.py
+++ b/bumpversion/vcs.py
@@ -5,6 +5,7 @@
 import logging
 import os
 import subprocess
+import errno
 from tempfile import NamedTemporaryFile
 
 from bumpversion.exceptions import (
@@ -51,8 +52,7 @@ def is_usable(cls):
                 == 0
             )
         except OSError as e:
-            if e.errno in (2, 13):
-                # VCS is not installed or permission denied then, ok.
+            if e.errno in (errno.ENOENT, errno.EACCES):
                 return False
             raise
 

From 10dd277be7c3a75b29c1bd8e37063808d8aa24a8 Mon Sep 17 00:00:00 2001
From: Ewoud Kohl van Wijngaarden <ewoud@kohlvanwijngaarden.nl>
Date: Tue, 25 Jun 2019 15:47:28 +0200
Subject: [PATCH 3/3] Sort imports

---
 bumpversion/vcs.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bumpversion/vcs.py b/bumpversion/vcs.py
index 767ee06..0a577c4 100644
--- a/bumpversion/vcs.py
+++ b/bumpversion/vcs.py
@@ -2,10 +2,10 @@
 
 from __future__ import unicode_literals, print_function
 
+import errno
 import logging
 import os
 import subprocess
-import errno
 from tempfile import NamedTemporaryFile
 
 from bumpversion.exceptions import (