def dpkg_query(info, regex):
"""
Get the given information concerning all package matching the given regex.
"""
return system.get_output_cmd(["/usr/bin/dpkg-query",
"--show",
"--showformat", info,
regex])
def get_distrib():
"""
Find out wich distribution is currently running this script.
"""
operating_system = system.get_output_cmd(["/bin/uname",
"--operating-system"])
if re.search("GNU/Linux", operating_system):
if os.path.exists("/etc/debian_version"):
return "debian"
elif os.path.exists("/etc/redhat-release"):
return "redhat"
else:
raise ValueError("cannot find the current distribution")
else:
raise ValueError("cannot find the current operating system")
def query_version(package):
""" Get the version of the given package """
distribution = get_distrib() # Choose the appropriate package query tool
if distribution == "debian":
cmd = ["/usr/bin/apt-cache", "show", package]
elif distribution == "redhat":
cmd = ["/usr/bin/yum", "--quiet", "info", package]
else:
raise ValueError("cannot find the current distribution")
output = system.get_output_cmd(cmd) # Retrieve package informations
pattern = re.compile("Version[ \t]*:[ \t]+(?P<version>[0-9.]+)")
m = pattern.search(output) # Extract package version
if m:
return m.group("version")
else:
raise ValueError("cannot find OpenNMS version")
return None
def is_installed(package):
""" Get the status of the given package """
#return dpkg_query("${Status}", package)
distribution = get_distrib()
if distribution == "debian":
cmd = ["/usr/bin/dpkg-query", "--show", "--showformat", "${Status}",
package]
elif distribution == "redhat":
cmd = ["/bin/rpm", "--query", package]
else:
raise ValueError("cannot find the current distribution")
output = system.get_output_cmd(cmd)
if distribution == "debian":
return output == "install ok installed"
elif distribution == "redhat":
if re.match("package \w+ is not installed", package):
return False
else:
return True
