Add utility function to check whether an executable is available in
the PATH env variable.
---
src/virtBootstrap/utils.py | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/src/virtBootstrap/utils.py b/src/virtBootstrap/utils.py
index 84d1629..ea84ed3 100644
--- a/src/virtBootstrap/utils.py
+++ b/src/virtBootstrap/utils.py
@@ -646,3 +646,16 @@ def mapping_uid_gid(dest, uid_map, gid_map):
balance_uid_gid_maps(uid_map, gid_map)
for uid, gid in zip(uid_map, gid_map):
map_id(dest, uid, gid)
+
+
+def is_installed(program):
+ """
+ Try to find executable listed in the PATH env variable.
+
+ Returns the complete filename or None if not found.
+ """
+ for path in os.environ["PATH"].split(os.pathsep):
+ exec_file = os.path.join(path, program)
+ if os.path.isfile(exec_file) and os.access(exec_file, os.X_OK):
+ return exec_file
+ return None
--
2.13.6
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