[PATCH 1/3] Add is_installed method

[Jiri Prochazka]

This method is used for detecting if program is present in $PATH

Signed-off-by: Jiri Prochazka <jprochaz(a)redhat.com&gt;
---
 lnst/Common/Utils.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lnst/Common/Utils.py b/lnst/Common/Utils.py
index c283b99..d198b6f 100644
--- a/lnst/Common/Utils.py
+++ b/lnst/Common/Utils.py
@@ -263,3 +263,16 @@ def std_deviation(values):
         s1 += val
         s2 += val**2
     return (math.sqrt(len(values)*s2 - s1**2))/len(values)
+
+def is_installed(program):
+    """
+    Returns True if program is detected by which, False otherwise
+    """
+    cmd = "which %s" % program
+    process = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE,
+                               stderr=subprocess.PIPE)
+    output = process.communicate()[0]
+    if process.returncode == 0:
+        return True
+    else:
+        return False
-- 
2.4.3