128 lines
3.8 KiB
Python
128 lines
3.8 KiB
Python
"""Package management related tools."""
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import re
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from . import utils
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class Package:
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"""Base classe."""
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def __init__(self, dist_name):
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"""Constructor."""
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self.dist_name = dist_name
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def preconfigure(self, name, question, qtype, answer):
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"""Empty method."""
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pass
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def prepare_system(self):
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pass
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def restore_system(self):
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pass
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class DEBPackage(Package):
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"""DEB based operations."""
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FORMAT = "deb"
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def __init__(self, dist_name):
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super().__init__(dist_name)
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self.index_updated = False
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self.policy_file = "/usr/sbin/policy-rc.d"
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def enable_backports(self, codename):
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code, output = utils.exec_cmd(f"grep {codename}-backports /etc/apt/sources.list")
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if code:
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with open(f"/etc/apt/sources.list.d/backports.list", "w") as fp:
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fp.write(f"deb http://deb.debian.org/debian {codename}-backports main\n")
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def prepare_system(self):
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"""Make sure services don't start at installation."""
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with open(self.policy_file, "w") as fp:
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fp.write("exit 101\n")
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utils.exec_cmd("chmod +x {}".format(self.policy_file))
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def restore_system(self):
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utils.exec_cmd("rm -f {}".format(self.policy_file))
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def update(self):
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"""Update local cache."""
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if self.index_updated:
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return
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utils.exec_cmd("apt-get -o Dpkg::Progress-Fancy=0 update --quiet")
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self.index_updated = True
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def preconfigure(self, name, question, qtype, answer):
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"""Pre-configure a package before installation."""
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line = "{0} {0}/{1} {2} {3}".format(name, question, qtype, answer)
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utils.exec_cmd("echo '{}' | debconf-set-selections".format(line))
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def install(self, name):
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"""Install a package."""
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self.update()
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utils.exec_cmd("apt-get -o Dpkg::Progress-Fancy=0 install --quiet --assume-yes -o DPkg::options::=--force-confold {}".format(name))
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def install_many(self, names):
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"""Install many packages."""
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self.update()
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return utils.exec_cmd("apt-get -o Dpkg::Progress-Fancy=0 install --quiet --assume-yes -o DPkg::options::=--force-confold {}".format(
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" ".join(names)))
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def get_installed_version(self, name):
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"""Get installed package version."""
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code, output = utils.exec_cmd(
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"dpkg -s {} | grep Version".format(name))
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match = re.match(r"Version: (\d:)?(.+)-\d", output.decode())
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if match:
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return match.group(2)
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return None
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class RPMPackage(Package):
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"""RPM based operations."""
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FORMAT = "rpm"
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def __init__(self, dist_name):
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"""Initialize backend."""
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super(RPMPackage, self).__init__(dist_name)
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if "centos" in dist_name:
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self.install("epel-release")
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def install(self, name):
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"""Install a package."""
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utils.exec_cmd("yum install -y --quiet {}".format(name))
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def install_many(self, names):
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"""Install many packages."""
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return utils.exec_cmd("yum install -y --quiet {}".format(" ".join(names)))
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def get_installed_version(self, name):
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"""Get installed package version."""
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code, output = utils.exec_cmd(
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"rpm -qi {} | grep Version".format(name))
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match = re.match(r"Version\s+: (.+)", output.decode())
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if match:
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return match.group(1)
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return None
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def get_backend():
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"""Return the appropriate package backend."""
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distname = utils.dist_name()
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backend = None
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if distname in ["debian", "debian gnu/linux", "ubuntu", "linuxmint"]:
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backend = DEBPackage
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elif "centos" in distname:
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backend = RPMPackage
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else:
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raise NotImplementedError(
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"Sorry, this distribution is not supported yet.")
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return backend(distname)
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backend = get_backend()
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