//WIP

wo/core/shellexec.py

@@ -37,6 +37,27 @@ class WOShellExec():
             Log.debug(self, str(e))
             raise CommandExecutionError
 
+    def cmd_exist(self, command):
+        """Check if a command exist with command -v"""
+        try:
+            Log.debug(self, "Testing command: {0}".format(command))
+            testing_command = ("command -v {0}".format(command))
+            with subprocess.Popen([testing_command], stdout=subprocess.PIPE,
+                                  stderr=subprocess.PIPE, shell=True) as proc:
+                (cmd_stdout_bytes, cmd_stderr_bytes) = proc.communicate()
+                (cmd_stdout, cmd_stderr) = (
+                    cmd_stdout_bytes.decode('utf-8', "replace"),
+                    cmd_stderr_bytes.decode('utf-8', "replace"))
+            Log.debug(self, "Command Output: {0}, \nCommand Error: {1}"
+                      .format(cmd_stdout, cmd_stderr))
+            return bool(proc.returncode == 0)
+        except OSError as e:
+            Log.debug(self, str(e))
+            raise CommandExecutionError
+        except Exception as e:
+            Log.debug(self, str(e))
+            raise CommandExecutionError
+
     def invoke_editor(self, filepath, errormsg=''):
         """
             Open files using sensible editor

wo/core/variables.py

@@ -163,6 +163,7 @@ class WOVar():
 
     wo_fail2ban = ["fail2ban"]
     wo_clamav = ["clamav", "clamav-freshclam"]
+    wo_ubuntu_backports = 'ppa:jonathonf/backports'
 
     # Redis repo details
     if wo_distro == 'ubuntu':