Re: [PATCH] common_lib: Adding software_manager.py

[Lucas Meneghel Rodrigues <lmr@redhat.com>]

On Mon, 2010-11-29 at 00:44 -0200, Lucas Meneghel Rodrigues wrote:
> This patch adds a software management abstraction layer
> on top of popular distro package management abstraction
> layers. Frequently we want to install a given distro
> provided software package, but there's no single interface
> to do so.
> 
> The software manager API tries to expose conveniently the
> main package operations performed during software testing:
> 
> install() - Install a package or list of packages
> remove() - Remove a package or list of packages
> list_all() - List all packages installed
> list_files() - List all files installed by a given package
> add_repo() - Add a software repository
> remove_repo() - Remove a software repository

I forgot to mention

provides() - Return a list of packages that provide '/path/to/file'
install_what_provides() - Install package that provides '/path/to/file'

> 
> So test writers don't have to care whether it is yum or
> apt-get managing the system software. A rudimentary
> command line interface for the API is provided, so
> people can try out the methods.
> 
> The ideas of use inside autotest are:
>  * Replace all client.bin.package usage
>  * Usage with build_externals.py to install packages
>  * Provide a job.software_manager() attribute so people
>    can manipulate software install easily inside control
>    files and tests
> 
> The idea/very early draft came out more than 18 months
> ago back in IBM (Ramon and Higor helped to write the
> base methods), but only now I really sat to finish it
> and sent it to the mailing list, to break the inertia :)
> 
> Tested/developed under the following systems:
>  * Fedora 13 (Yum backend)
>  * Ubuntu 10.04 (Apt backend)
>  * OpenSUSE 11.3 (Zypper backend)
> 
> Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
> Signed-off-by: Higor Vieira Alves <halves@br.ibm.com>
> Signed-off-by: Ramon de Carvalho Valle <rcvalle@br.ibm.com>
> ---
>  client/common_lib/software_manager.py |  788 +++++++++++++++++++++++++++++++++
>  1 files changed, 788 insertions(+), 0 deletions(-)
>  create mode 100755 client/common_lib/software_manager.py
> 
> diff --git a/client/common_lib/software_manager.py b/client/common_lib/software_manager.py
> new file mode 100755
> index 0000000..f67f667
> --- /dev/null
> +++ b/client/common_lib/software_manager.py
> @@ -0,0 +1,788 @@
> +#!/usr/bin/python
> +"""
> +Software package management library.
> +
> +This is an abstraction layer on top of the existing distributions high level
> +package managers. It supports package operations useful for testing purposes,
> +and multiple high level package managers (here called backends). If you want
> +to make this lib to support your particular package manager/distro, please
> +implement the given backend class.
> +
> +@author: Higor Vieira Alves (halves@br.ibm.com)
> +@author: Lucas Meneghel Rodrigues (lmr@redhat.com)
> +@author: Ramon de Carvalho Valle (rcvalle@br.ibm.com)
> +
> +@copyright: IBM 2008-2009
> +@copyright: Red Hat 2009-2010
> +"""
> +import os, re, logging, ConfigParser, optparse, random, string
> +try:
> +    import yum
> +except:
> +    pass
> +import common
> +from autotest_lib.client.bin import os_dep, utils
> +from autotest_lib.client.common_lib import error
> +from autotest_lib.client.common_lib import logging_config, logging_manager
> +
> +
> +def generate_random_string(length):
> +    """
> +    Return a random string using alphanumeric characters.
> +
> +    @length: Length of the string that will be generated.
> +    """
> +    r = random.SystemRandom()
> +    str = ""
> +    chars = string.letters + string.digits
> +    while length > 0:
> +        str += r.choice(chars)
> +        length -= 1
> +    return str
> +
> +
> +class SoftwareManagerLoggingConfig(logging_config.LoggingConfig):
> +    """
> +    Used with the sole purpose of providing convenient logging setup
> +    for the KVM test auxiliary programs.
> +    """
> +    def configure_logging(self, results_dir=None, verbose=False):
> +        super(SoftwareManagerLoggingConfig, self).configure_logging(
> +                                                            use_console=True,
> +                                                            verbose=verbose)
> +
> +
> +class SystemInspector(object):
> +    """
> +    System inspector class.
> +
> +    This may grow up to include more complete reports of operating system and
> +    machine properties.
> +    """
> +    def __init__(self):
> +        """
> +        Probe system, and save information for future reference.
> +        """
> +        self.distro = utils.get_os_vendor()
> +        self.high_level_pms = ['apt-get', 'yum', 'zypper']
> +
> +
> +    def get_package_management(self):
> +        """
> +        Determine the supported package management systems present on the
> +        system. If more than one package management system installed, try
> +        to find the best supported system.
> +        """
> +        list_supported = []
> +        for high_level_pm in self.high_level_pms:
> +            try:
> +                os_dep.command(high_level_pm)
> +                list_supported.append(high_level_pm)
> +            except:
> +                pass
> +
> +        pm_supported = None
> +        if len(list_supported) == 0:
> +            pm_supported = None
> +        if len(list_supported) == 1:
> +            pm_supported = list_supported[0]
> +        elif len(list_supported) > 1:
> +            if 'apt-get' in list_supported and self.distro in ['Debian', 'Ubuntu']:
> +                pm_supported = 'apt-get'
> +            elif 'yum' in list_supported and self.distro == 'Fedora':
> +                pm_supported = 'yum'
> +            else:
> +                pm_supported = list_supported[0]
> +
> +        logging.debug('Package Manager backend: %s' % pm_supported)
> +        return pm_supported
> +
> +
> +class SoftwareManager(object):
> +    """
> +    Package management abstraction layer.
> +
> +    It supports a set of common package operations for testing purposes, and it
> +    uses the concept of a backend, a helper class that implements the set of
> +    operations of a given package management tool.
> +    """
> +    def __init__(self):
> +        """
> +        Class constructor.
> +
> +        Determines the best supported package management system for the given
> +        operating system running and initializes the appropriate backend.
> +        """
> +        inspector = SystemInspector()
> +        backend_type = inspector.get_package_management()
> +        if backend_type == 'yum':
> +            self.backend = YumBackend()
> +        elif backend_type == 'zypper':
> +            self.backend = ZypperBackend()
> +        elif backend_type == 'apt-get':
> +            self.backend = AptBackend()
> +        else:
> +            raise NotImplementedError('Unimplemented package management '
> +                                      'system: %s.' % backend_type)
> +
> +
> +    def check_installed(self, name, version=None, arch=None):
> +        """
> +        Check whether a package is installed on this system.
> +
> +        @param name: Package name.
> +        @param version: Package version.
> +        @param arch: Package architecture.
> +        """
> +        return self.backend.check_installed(name, version, arch)
> +
> +
> +    def list_all(self):
> +        """
> +        List all installed packages.
> +        """
> +        return self.backend.list_all()
> +
> +
> +    def list_files(self, name):
> +        """
> +        Get a list of all files installed by package [name].
> +
> +        @param name: Package name.
> +        """
> +        return self.backend.list_files(name)
> +
> +
> +    def install(self, name):
> +        """
> +        Install package [name].
> +
> +        @param name: Package name.
> +        """
> +        return self.backend.install(name)
> +
> +
> +    def remove(self, name):
> +        """
> +        Remove package [name].
> +
> +        @param name: Package name.
> +        """
> +        return self.backend.remove(name)
> +
> +
> +    def add_repo(self, url):
> +        """
> +        Add package repo described by [url].
> +
> +        @param name: URL of the package repo.
> +        """
> +        return self.backend.add_repo(url)
> +
> +
> +    def remove_repo(self, url):
> +        """
> +        Remove package repo described by [url].
> +
> +        @param url: URL of the package repo.
> +        """
> +        return self.backend.remove_repo(url)
> +
> +
> +    def upgrade(self):
> +        """
> +        Upgrade all packages available.
> +        """
> +        return self.backend.upgrade()
> +
> +
> +    def provides(self, file):
> +        """
> +        Returns a list of packages that provides a given capability to the
> +        system (be it a binary, a library).
> +
> +        @param file: Path to the file.
> +        """
> +        return self.backend.provides(file)
> +
> +
> +    def install_what_provides(self, file):
> +        """
> +        Installs package that provides [file].
> +
> +        @param file: Path to file.
> +        """
> +        provides = self.provides(file)
> +        if provides is not None:
> +            self.install(provides)
> +        else:
> +            logging.warning('No package seems to provide %s', file)
> +
> +
> +class RpmBackend(object):
> +    """
> +    This class implements operations executed with the rpm package manager.
> +
> +    rpm is a lower level package manager, used by higher level managers such
> +    as yum and zypper.
> +    """
> +    def __init__(self):
> +        self.lowlevel_base_cmd = os_dep.command('rpm')
> +
> +
> +    def _check_installed_version(self, name, version):
> +        """
> +        Helper for the check_installed public method.
> +
> +        @param name: Package name.
> +        @param version: Package version.
> +        """
> +        cmd = (self.lowlevel_base_cmd + ' -q --qf %{VERSION} ' + name +
> +               ' 2> /dev/null')
> +        inst_version = utils.system_output(cmd)
> +
> +        if inst_version >= version:
> +            return True
> +        else:
> +            return False
> +
> +
> +    def check_installed(self, name, version=None, arch=None):
> +        """
> +        Check if package [name] is installed.
> +
> +        @param name: Package name.
> +        @param version: Package version.
> +        @param arch: Package architecture.
> +        """
> +        if arch:
> +            cmd = (self.lowlevel_base_cmd + ' -q --qf %{ARCH} ' + name +
> +                   ' 2> /dev/null')
> +            inst_archs = utils.system_output(cmd)
> +            inst_archs = inst_archs.split('\n')
> +
> +            for inst_arch in inst_archs:
> +                if inst_arch == arch:
> +                    return self._check_installed_version(name, version)
> +            return False
> +
> +        elif version:
> +            return self._check_installed_version(name, version)
> +        else:
> +            cmd = 'rpm -q ' + name + ' 2> /dev/null'
> +            return (os.system(cmd) == 0)
> +
> +
> +    def list_all(self):
> +        """
> +        List all installed packages.
> +        """
> +        installed_packages = utils.system_output('rpm -qa').splitlines()
> +        return installed_packages
> +
> +
> +    def list_files(self, name):
> +        """
> +        List files installed on the system by package [name].
> +
> +        @param name: Package name.
> +        """
> +        path = os.path.abspath(name)
> +        if os.path.isfile(path):
> +            option = '-qlp'
> +            name = path
> +        else:
> +            option = '-ql'
> +
> +        l_cmd = 'rpm' + ' ' + option + ' ' + name + ' 2> /dev/null'
> +
> +        try:
> +            result = utils.system_output(l_cmd)
> +            list_files = result.split('\n')
> +            return list_files
> +        except error.CmdError:
> +            return []
> +
> +
> +class DpkgBackend(object):
> +    """
> +    This class implements operations executed with the dpkg package manager.
> +
> +    dpkg is a lower level package manager, used by higher level managers such
> +    as apt and aptitude.
> +    """
> +    def __init__(self):
> +        self.lowlevel_base_cmd = os_dep.command('dpkg')
> +
> +
> +    def check_installed(self, name):
> +        if os.path.isfile(name):
> +            n_cmd = (self.lowlevel_base_cmd + ' -f ' + name +
> +                     ' Package 2>/dev/null')
> +            name = utils.system_output(n_cmd)
> +        i_cmd = self.lowlevel_base_cmd + ' -s ' + name + ' 2>/dev/null'
> +        # Checking if package is installed
> +        package_status = utils.system_output(i_cmd, ignore_status=True)
> +        not_inst_pattern = re.compile('not-installed', re.IGNORECASE)
> +        dpkg_not_installed = re.search(not_inst_pattern, package_status)
> +        if dpkg_not_installed:
> +            return False
> +        return True
> +
> +
> +    def list_all(self):
> +        """
> +        List all packages available in the system.
> +        """
> +        installed_packages = []
> +        raw_list = utils.system_output('dpkg -l').splitlines()[5:]
> +        for line in raw_list:
> +            parts = line.split()
> +            if parts[0] == "ii":  # only grab "installed" packages
> +                installed_packages.append("%s-%s" % (parts[1], parts[2]))
> +
> +
> +    def list_files(self, package):
> +        """
> +        List files installed by package [package].
> +
> +        @param package: Package name.
> +        @return: List of paths installed by package.
> +        """
> +        if os.path.isfile(package):
> +            l_cmd = self.lowlevel_base_cmd + ' -c ' + package
> +        else:
> +            l_cmd = self.lowlevel_base_cmd + ' -l ' + package
> +        return utils.system_output(l_cmd).split('\n')
> +
> +
> +class YumBackend(RpmBackend):
> +    """
> +    Implements the yum backend for software manager.
> +
> +    Set of operations for the yum package manager, commonly found on Yellow Dog
> +    Linux and Red Hat based distributions, such as Fedora and Red Hat
> +    Enterprise Linux.
> +    """
> +    def __init__(self):
> +        """
> +        Initializes the base command and the yum package repository.
> +        """
> +        super(YumBackend, self).__init__()
> +        executable = os_dep.command('yum')
> +        base_arguments = '-y'
> +        self.base_command = executable + ' ' + base_arguments
> +        self.repo_file_path = '/etc/yum.repos.d/autotest.repo'
> +        self.cfgparser = ConfigParser.ConfigParser()
> +        self.cfgparser.read(self.repo_file_path)
> +        y_cmd = executable + ' --version | head -1'
> +        self.yum_version = utils.system_output(y_cmd, ignore_status=True)
> +        logging.debug('Yum backend initialized')
> +        logging.debug('Yum version: %s' % self.yum_version)
> +        self.yum_base = yum.YumBase()
> +
> +
> +    def _cleanup(self):
> +        """
> +        Clean up the yum cache so new package information can be downloaded.
> +        """
> +        utils.system("yum clean all")
> +
> +
> +    def install(self, name):
> +        """
> +        Installs package [name]. Handles local installs.
> +        """
> +        if os.path.isfile(name):
> +            name = os.path.abspath(name)
> +            command = 'localinstall'
> +        else:
> +            command = 'install'
> +
> +        i_cmd = self.base_command + ' ' + command + ' ' + name
> +
> +        try:
> +            utils.system(i_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def remove(self, name):
> +        """
> +        Removes package [name].
> +
> +        @param name: Package name (eg. 'ipython').
> +        """
> +        r_cmd = self.base_command + ' ' + 'erase' + ' ' + name
> +        try:
> +            utils.system(r_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def add_repo(self, url):
> +        """
> +        Adds package repository located on [url].
> +
> +        @param url: Universal Resource Locator of the repository.
> +        """
> +        # Check if we URL is already set
> +        for section in self.cfgparser.sections():
> +            for option, value in self.cfgparser.items(section):
> +                if option == 'url' and value == url:
> +                    return True
> +
> +        # Didn't find it, let's set it up
> +        while True:
> +            section_name = 'software_manager' + '_' + generate_random_string(4)
> +            if not self.cfgparser.has_section(section_name):
> +                break
> +        self.cfgparser.add_section(section_name)
> +        self.cfgparser.set(section_name, 'name',
> +                           'Repository added by the autotest software manager.')
> +        self.cfgparser.set(section_name, 'url', url)
> +        self.cfgparser.set(section_name, 'enabled', 1)
> +        self.cfgparser.set(section_name, 'gpgcheck', 0)
> +        self.cfgparser.write(self.repo_file_path)
> +
> +
> +    def remove_repo(self, url):
> +        """
> +        Removes package repository located on [url].
> +
> +        @param url: Universal Resource Locator of the repository.
> +        """
> +        for section in self.cfgparser.sections():
> +            for option, value in self.cfgparser.items(section):
> +                if option == 'url' and value == url:
> +                    self.cfgparser.remove_section(section)
> +                    self.cfgparser.write(self.repo_file_path)
> +
> +
> +    def upgrade(self):
> +        """
> +        Upgrade all available packages.
> +        """
> +        r_cmd = self.base_command + ' ' + 'update'
> +        try:
> +            utils.system(r_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def provides(self, name):
> +        """
> +        Returns a list of packages that provides a given capability.
> +
> +        @param name: Capability name (eg, 'foo').
> +        """
> +        d_provides = self.yum_base.searchPackageProvides(args=[name])
> +        provides_list = [key for key in d_provides]
> +        if provides_list:
> +            logging.info("Package %s provides %s", provides_list[0], name)
> +            return str(provides_list[0])
> +        else:
> +            return None
> +
> +
> +class ZypperBackend(RpmBackend):
> +    """
> +    Implements the zypper backend for software manager.
> +
> +    Set of operations for the zypper package manager, found on SUSE Linux.
> +    """
> +    def __init__(self):
> +        """
> +        Initializes the base command and the yum package repository.
> +        """
> +        super(ZypperBackend, self).__init__()
> +        self.base_command = os_dep.command('zypper') + ' -n'
> +        z_cmd = self.base_command + ' --version'
> +        self.zypper_version = utils.system_output(z_cmd, ignore_status=True)
> +        logging.debug('Zypper backend initialized')
> +        logging.debug('Zypper version: %s' % self.zypper_version)
> +
> +
> +    def install(self, name):
> +        """
> +        Installs package [name]. Handles local installs.
> +
> +        @param name: Package Name.
> +        """
> +        path = os.path.abspath(name)
> +        i_cmd = self.base_command + ' install -l ' + name
> +        try:
> +            utils.system(i_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def add_repo(self, url):
> +        """
> +        Adds repository [url].
> +
> +        @param url: URL for the package repository.
> +        """
> +        ar_cmd = self.base_command + ' addrepo ' + url
> +        try:
> +            utils.system(ar_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def remove_repo(self, url):
> +        """
> +        Removes repository [url].
> +
> +        @param url: URL for the package repository.
> +        """
> +        rr_cmd = self.base_command + ' removerepo ' + url
> +        try:
> +            utils.system(rr_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def remove(self, name):
> +        """
> +        Removes package [name].
> +        """
> +        r_cmd = self.base_command + ' ' + 'erase' + ' ' + name
> +
> +        try:
> +            utils.system(r_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def upgrade(self):
> +        """
> +        Upgrades all packages of the system.
> +        """
> +        u_cmd = self.base_command + ' update -l'
> +
> +        try:
> +            utils.system(u_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def provides(self, name):
> +        """
> +        Searches for what provides a given file.
> +
> +        @param name: File path.
> +        """
> +        p_cmd = self.base_command + ' what-provides ' + name
> +        list_provides = []
> +        try:
> +            p_output = utils.system_output(p_cmd).split('\n')[4:]
> +            for line in p_output:
> +                line = [a.strip() for a in line.split('|')]
> +                try:
> +                    state, pname, type, version, arch, repository = line
> +                    if pname not in list_provides:
> +                        list_provides.append(pname)
> +                except IndexError:
> +                    pass
> +            if len(list_provides) > 1:
> +                logging.warning('More than one package found, '
> +                                'opting by the first queue result')
> +            if list_provides:
> +                logging.info("Package %s provides %s", list_provides[0], name)
> +                return list_provides[0]
> +            return None
> +        except:
> +            return None
> +
> +
> +class AptBackend(DpkgBackend):
> +    """
> +    Implements the apt backend for software manager.
> +
> +    Set of operations for the apt package manager, commonly found on Debian and
> +    Debian based distributions, such as Ubuntu Linux.
> +    """
> +    def __init__(self):
> +        """
> +        Initializes the base command and the debian package repository.
> +        """
> +        super(AptBackend, self).__init__()
> +        executable = os_dep.command('apt-get')
> +        self.base_command = executable + ' -y'
> +        self.repo_file_path = '/etc/apt/sources.list.d/autotest'
> +        self.apt_version = utils.system_output('apt-get -v | head -1',
> +                                               ignore_status=True)
> +        logging.debug('Apt backend initialized')
> +        logging.debug('apt version: %s' % self.apt_version)
> +
> +
> +    def install(self, name):
> +        """
> +        Installs package [name].
> +
> +        @param name: Package name.
> +        """
> +        command = 'install'
> +        i_cmd = self.base_command + ' ' + command + ' ' + name
> +
> +        try:
> +            utils.system(i_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def remove(self, name):
> +        """
> +        Remove package [name].
> +
> +        @param name: Package name.
> +        """
> +        command = 'remove'
> +        flag = '--purge'
> +        r_cmd = self.base_command + ' ' + command + ' ' + flag + ' ' + name
> +
> +        try:
> +            utils.system(r_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def add_repo(self, repo):
> +        """
> +        Add an apt repository.
> +
> +        @param repo: Repository string. Example:
> +                'deb http://archive.ubuntu.com/ubuntu/ maverick universe'
> +        """
> +        repo_file = open(self.repo_file_path, 'a')
> +        repo_file_contents = repo_file.read()
> +        if repo not in repo_file_contents:
> +            repo_file.write(repo)
> +
> +
> +    def remove_repo(self, repo):
> +        """
> +        Remove an apt repository.
> +
> +        @param repo: Repository string. Example:
> +                'deb http://archive.ubuntu.com/ubuntu/ maverick universe'
> +        """
> +        repo_file = open(self.repo_file_path, 'r')
> +        new_file_contents = []
> +        for line in repo_file.readlines:
> +            if not line == repo:
> +                new_file_contents.append(line)
> +        repo_file.close()
> +        new_file_contents = "\n".join(new_file_contents)
> +        repo_file.open(self.repo_file_path, 'w')
> +        repo_file.write(new_file_contents)
> +        repo_file.close()
> +
> +
> +    def upgrade(self):
> +        """
> +        Upgrade all packages of the system with eventual new versions.
> +        """
> +        ud_command = 'update'
> +        ud_cmd = self.base_command + ' ' + ud_command
> +        try:
> +            utils.system(ud_cmd)
> +        except:
> +            logging.error("Apt package update failed")
> +        up_command = 'upgrade'
> +        up_cmd = self.base_command + ' ' + up_command
> +        try:
> +            utils.system(up_cmd)
> +            return True
> +        except:
> +            return False
> +
> +
> +    def provides(self, file):
> +        """
> +        Return a list of packages that provide [file].
> +
> +        @param file: File path.
> +        """
> +        if not self.check_installed('apt-file'):
> +            self.install('apt-file')
> +        command = os_dep.command('apt-file')
> +        cache_update_cmd = command + ' update'
> +        try:
> +            utils.system(cache_update_cmd, ignore_status=True)
> +        except:
> +            logging.error("Apt file cache update failed")
> +        fu_cmd = command + ' search ' + file
> +        try:
> +            provides = utils.system_output(fu_cmd).split('\n')
> +            list_provides = []
> +            for line in provides:
> +                if line:
> +                    try:
> +                        line = line.split(':')
> +                        package = line[0].strip()
> +                        path = line[1].strip()
> +                        if path == file and package not in list_provides:
> +                            list_provides.append(package)
> +                    except IndexError:
> +                        pass
> +            if len(list_provides) > 1:
> +                logging.warning('More than one package found, '
> +                                'opting by the first queue result')
> +            if list_provides:
> +                logging.info("Package %s provides %s", list_provides[0], file)
> +                return list_provides[0]
> +            return None
> +        except:
> +            return None
> +
> +
> +if __name__ == '__main__':
> +    parser = optparse.OptionParser(
> +    "usage: %prog [install|remove|list-all|list-files|add-repo|remove-repo|"
> +    "upgrade|what-provides|install-what-provides] arguments")
> +    parser.add_option('--verbose', dest="debug", action='store_true',
> +                      help='include debug messages in console output')
> +
> +    options, args = parser.parse_args()
> +    debug = options.debug
> +    logging_manager.configure_logging(SoftwareManagerLoggingConfig(),
> +                                      verbose=debug)
> +    software_manager = SoftwareManager()
> +    if args:
> +        action = args[0]
> +        args = " ".join(args[1:])
> +    else:
> +        action = 'show-help'
> +
> +    if action == 'install':
> +        software_manager.install(args)
> +    elif action == 'remove':
> +        software_manager.remove(args)
> +    if action == 'list-all':
> +        software_manager.list_all()
> +    elif action == 'list-files':
> +        software_manager.list_files(args)
> +    elif action == 'add-repo':
> +        software_manager.add_repo(args)
> +    elif action == 'remove-repo':
> +        software_manager.remove_repo(args)
> +    elif action == 'upgrade':
> +        software_manager.upgrade()
> +    elif action == 'what-provides':
> +        software_manager.provides(args)
> +    elif action == 'install-what-provides':
> +        software_manager.install_what_provides(args)
> +    elif action == 'show-help':
> +        parser.print_help()