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yummain.py

#!/usr/bin/python -t
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Copyright 2005 Duke University

"""
Entrance point for the yum command line interface.
"""

import os
import os.path
import sys
import logging
import time
import errno

from yum import Errors
from yum import plugins
from yum import logginglevels
from yum import _
from yum.i18n import utf8_width, exception2msg
import yum.misc
import cli
from utils import suppress_keyboard_interrupt_message

def main(args):
    """Run the yum program from a command line interface."""

yum.misc.setup_locale(override_time=True)

def exUserCancel():
        logger.critical(_('\n\nExiting on user cancel'))
        if unlock(): return 200
        return 1

def exIOError(e):
        if e.errno == 32:
            logger.critical(_('\n\nExiting on Broken Pipe'))
        else:
            logger.critical(_('\n\n%s') % exception2msg(e))
        if unlock(): return 200
        return 1

def exPluginExit(e):
        '''Called when a plugin raises PluginYumExit.

Log the plugin's exit message if one was supplied.
        ''' # ' xemacs hack
        exitmsg = exception2msg(e)
        if exitmsg:
            logger.warn('\n\n%s', exitmsg)
        if unlock(): return 200
        return 1

def exFatal(e):
        logger.critical('\n\n%s', exception2msg(e.value))
        if unlock(): return 200
        return 1

def exRepoError(e):
        # For RepoErrors ... help out by forcing new repodata next time.
        # XXX: clean only the repo that has failed?
        try:
            base.cleanExpireCache()
        except Errors.YumBaseError:
            # Let's not confuse the user further (they don't even know we tried
            # the clean).
            pass

msg = _("""\
 One of the configured repositories failed (%(repo)s),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

1. Contact the upstream for the repository and get them to fix the problem.

2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

3. Run the command with the repository temporarily disabled
            yum --disablerepo=%(repoid)s ...

4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

yum-config-manager --disable %(repoid)s
        or
            subscription-manager repos --disable=%(repoid)s

5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

yum-config-manager --save --setopt=%(repoid)s.skip_if_unavailable=true
""")

repoui = _('Unknown')
        repoid = _('<repoid>')
        if hasattr(e, 'repo'):
            repoid = e.repo.id
            repoui = e.repo.name

msg = msg % {'repoid' : repoid, 'repo' : repoui}

logger.critical('\n\n%s\n%s', msg, exception2msg(e))

if unlock(): return 200
        return 1

def unlock():
        try:
            base.closeRpmDB()
            base.doUnlock()
        except Errors.LockError, e:
            return 200
        return 0

def rpmdb_warn_checks():
        try:
            probs = base._rpmdb_warn_checks(out=verbose_logger.info, warn=False)
        except Errors.YumBaseError, e:
            # This is mainly for PackageSackError from rpmdb.
            verbose_logger.info(_(" Yum checks failed: %s"), exception2msg(e))
            probs = []
        if not probs:
            verbose_logger.info(_(" You could try running: rpm -Va --nofiles --nodigest"))

logger = logging.getLogger("yum.main")
    verbose_logger = logging.getLogger("yum.verbose.main")

# Try to open the current directory to see if we have 
    # read and execute access. If not, chdir to /
    try:
        f = open(".")
    except IOError, e:
        if e.errno == errno.EACCES:
            logger.critical(_('No read/execute access in current directory, moving to /'))
            os.chdir("/")
    else:
        f.close()
    try:
        os.getcwd()
    except OSError, e:
        if e.errno == errno.ENOENT:
            logger.critical(_('No getcwd() access in current directory, moving to /'))
            os.chdir("/")

# our core object for the cli
    base = cli.YumBaseCli()

# do our cli parsing and config file setup
    # also sanity check the things being passed on the cli
    try:
        base.getOptionsConfig(args)
    except plugins.PluginYumExit, e:
        return exPluginExit(e)
    except Errors.YumBaseError, e:
        return exFatal(e)
    except (OSError, IOError), e:
        return exIOError(e)

try:
        base.waitForLock()
    except Errors.YumBaseError, e:
        return exFatal(e)

try:
        result, resultmsgs = base.doCommands()
    except plugins.PluginYumExit, e:
        return exPluginExit(e)
    except Errors.RepoError, e:
        return exRepoError(e)
    except Errors.YumBaseError, e:
        result = 1
        resultmsgs = [exception2msg(e)]
    except KeyboardInterrupt:
        return exUserCancel()
    except IOError, e:
        return exIOError(e)

# Act on the command/shell result
    if result == 0:
        # Normal exit 
        for msg in resultmsgs:
            verbose_logger.log(logginglevels.INFO_2, '%s', msg)
        if unlock(): return 200
        return base.exit_code
    elif result == 1:
        # Fatal error
        for msg in resultmsgs:
            logger.critical(_('Error: %s'), msg)
        if unlock(): return 200
        return 1
    elif result == 2:
        # Continue on
        pass
    elif result == 100:
        if unlock(): return 200
        return 100
    else:
        logger.critical(_('Unknown Error(s): Exit Code: %d:'), result)
        for msg in resultmsgs:
            logger.critical(msg)
        if unlock(): return 200
        return 3

# Mainly for ostree, but might be useful for others.
    if base.conf.usr_w_check:
        usrinstpath = base.conf.installroot + "/usr"
        usrinstpath = usrinstpath.replace('//', '/')
        if (os.path.exists(usrinstpath) and
            not os.access(usrinstpath, os.W_OK)):
            logger.critical(_('No write access to %s directory') % usrinstpath)
            logger.critical(_('  Maybe this is an ostree image?'))
            logger.critical(_('  To disable you can use --setopt=usr_w_check=false'))
            if unlock(): return 200
            return 1
            
    # Depsolve stage
    verbose_logger.log(logginglevels.INFO_2, _('Resolving Dependencies'))

try:
        (result, resultmsgs) = base.buildTransaction() 
    except plugins.PluginYumExit, e:
        return exPluginExit(e)
    except Errors.RepoError, e:
        return exRepoError(e)
    except Errors.YumBaseError, e:
        result = 1
        resultmsgs = [exception2msg(e)]
    except KeyboardInterrupt:
        return exUserCancel()
    except IOError, e:
        return exIOError(e)
   
    # Act on the depsolve result
    if result == 0:
        # Normal exit
        if unlock(): return 200
        return base.exit_code
    elif result == 1:
        # Fatal error
        for prefix, msg in base.pretty_output_restring(resultmsgs):
            logger.critical(prefix, msg)
        if base._depsolving_failed:
            if not base.conf.skip_broken:
                verbose_logger.info(_(" You could try using --skip-broken to work around the problem"))
            rpmdb_warn_checks()
        if unlock(): return 200
        return 1
    elif result == 2:
        # Continue on
        pass
    else:
        logger.critical(_('Unknown Error(s): Exit Code: %d:'), result)
        for msg in resultmsgs:
            logger.critical(msg)
        if unlock(): return 200
        return 3

verbose_logger.log(logginglevels.INFO_2, _('\nDependencies Resolved'))

# Run the transaction
    try:
        return_code = base.doTransaction()
    except plugins.PluginYumExit, e:
        return exPluginExit(e)
    except Errors.RepoError, e:
        return exRepoError(e)
    except Errors.YumBaseError, e:
        return exFatal(e)
    except KeyboardInterrupt:
        return exUserCancel()
    except IOError, e:
        return exIOError(e)

# rpm ts.check() failed.
    if type(return_code) == type((0,)) and len(return_code) == 2:
        (result, resultmsgs) = return_code
        for msg in resultmsgs:
            logger.critical("%s", msg)
        rpmdb_warn_checks()
        return_code = result
        if base._ts_save_file:
            verbose_logger.info(_("Your transaction was saved, rerun it with:\n yum load-transaction %s") % base._ts_save_file)
    elif return_code < 0:
        return_code = 1 # Means the pre-transaction checks failed...
        #  This includes:
        # . No packages.
        # . Hitting N at the prompt.
        # . GPG check failures.
        if base._ts_save_file:
            verbose_logger.info(_("Your transaction was saved, rerun it with:\n yum load-transaction %s") % base._ts_save_file)
    else:
        verbose_logger.log(logginglevels.INFO_2, _('Complete!'))

if unlock(): return 200
    return return_code or base.exit_code

def hotshot(func, *args, **kwargs):
    """Profile the given function using the hotshot profiler.

:param func: the function to profile
    :return: the return code given by the hotshot profiler
    """
    import hotshot.stats
    fn = os.path.expanduser("~/yum.prof")
    prof = hotshot.Profile(fn)
    rc = prof.runcall(func, *args, **kwargs)
    prof.close()
    print_stats(hotshot.stats.load(fn))
    return rc

def cprof(func, *args, **kwargs):
    """Profile the given function using the cprof profiler.

:param func: the function to profile
    :return: the return code given by the cprof profiler
    """
    import cProfile, pstats
    fn = os.path.expanduser("~/yum.prof")
    prof = cProfile.Profile()
    rc = prof.runcall(func, *args, **kwargs)
    prof.dump_stats(fn)
    print_stats(pstats.Stats(fn))
    return rc

def print_stats(stats):
    """Print out information from a :class:`Stats` object.

:param stats: the :class:`Stats` object to print information from
    """
    stats.strip_dirs()
    stats.sort_stats('time', 'calls')
    stats.print_stats(20)
    stats.sort_stats('cumulative')
    stats.print_stats(40)

def user_main(args, exit_code=False):
    """Call one of the multiple main() functions based on environment variables.

:param args: command line arguments passed into yum
    :param exit_code: if *exit_code* is True, this function will exit
       python with its exit code when it has finished executing.
       Otherwise, it will return its exit code.
    :return: the exit code from yum execution
    """
    errcode = None
    if 'YUM_PROF' in os.environ:
        if os.environ['YUM_PROF'] == 'cprof':
            errcode = cprof(main, args)
        if os.environ['YUM_PROF'] == 'hotshot':
            errcode = hotshot(main, args)
    if 'YUM_PDB' in os.environ:
        import pdb
        pdb.run(main(args))

if errcode is None:
        errcode = main(args)
    if exit_code:
        sys.exit(errcode)
    return errcode

suppress_keyboard_interrupt_message()

if __name__ == "__main__":
    try:
        user_main(sys.argv[1:], exit_code=True)
    except KeyboardInterrupt, e:
        print >> sys.stderr, _("\n\nExiting on user cancel.")
        sys.exit(1)

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2020-11-13 01:34:58
..	dir	-	root/root	0755	2025-11-06 09:25:21
callback.py	text/x-python	9.15 KB	root/root	0755	2020-10-01 05:03:44
callback.pyc	application/octet-stream	6.72 KB	root/root	0644	2020-10-01 05:03:44
cli.py	text/x-python	107.07 KB	root/root	0755	2020-10-01 05:03:44
cli.pyc	application/octet-stream	75.6 KB	root/root	0644	2020-10-01 05:03:44
completion-helper.py	text/x-python	3.4 KB	root/root	0755	2020-10-01 05:03:44
output.py	text/x-python	136.49 KB	root/root	0755	2020-10-01 05:03:44
output.pyc	application/octet-stream	106.22 KB	root/root	0644	2020-10-01 05:03:44
shell.py	text/x-python	17.41 KB	root/root	0755	2020-10-01 05:03:44
shell.pyc	application/octet-stream	14.41 KB	root/root	0644	2020-10-01 05:03:44
utils.py	text/x-python	15.45 KB	root/root	0755	2020-10-01 05:03:44
utils.pyc	application/octet-stream	14.49 KB	root/root	0644	2020-10-01 05:03:44
yumcommands.py	text/x-python	185.06 KB	root/root	0755	2020-10-01 05:03:44
yumcommands.pyc	application/octet-stream	165.67 KB	root/root	0644	2020-10-01 05:03:44
yummain.py	text/x-python	12.33 KB	root/root	0755	2020-10-01 05:03:44
yummain.pyc	application/octet-stream	10.62 KB	root/root	0644	2020-10-01 05:03:44

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