#!/usr/bin/python -t

##CJS I changed the "my.logger.info" statement near line 241 to make it 
## easier to determine what is a issue via simple grep statements
## repoclosure.py is part of yum-utils on SLF 5.
# 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.
# seth vidal 2005 (c) etc etc


#Read in the metadata of a series of repositories and check all the
#   dependencies in all packages for resolution. Print out the list of
#   packages with unresolved dependencies

import sys
import os

import logging
import yum
import yum.Errors
from yum.misc import getCacheDir
from optparse import OptionParser
import rpmUtils.arch
from yum.constants import *
from yum.packageSack import ListPackageSack

def parseArgs():
    usage = """
    Read in the metadata of a series of repositories and check all the   
    dependencies in all packages for resolution. Print out the list of
    packages with unresolved dependencies
    
    %s [-c <config file>] [-a <arch>] [-r <repoid>] [-r <repoid2>]
    """ % sys.argv[0]
    parser = OptionParser(usage=usage)
    parser.add_option("-c", "--config", default='/etc/yum.conf',
        help='config file to use (defaults to /etc/yum.conf)')
    parser.add_option("-a", "--arch", default=[], action='append',
        help='check packages of the given archs, can be specified multiple ' +
             'times (default: current arch)')
    parser.add_option("-b", "--builddeps", default=False, action="store_true",
        help='check build dependencies only (needs source repos enabled)')
    parser.add_option("-r", "--repoid", default=[], action='append',
        help="specify repo ids to query, can be specified multiple times (default is all enabled)")
    parser.add_option("-t", "--tempcache", default=False, action="store_true", 
        help="Use a temp dir for storing/accessing yum-cache")
    parser.add_option("-q", "--quiet", default=0, action="store_true", 
                      help="quiet (no output to stderr)")
    parser.add_option("-n", "--newest", default=0, action="store_true",
                      help="check only the newest packages in the repos")
    parser.add_option("--repofrompath", action="append",
                      help="specify repoid & paths of additional repositories - unique repoid and complete path required, can be specified multiple times. Example. --repofrompath=myrepo,/path/to/repo")
    (opts, args) = parser.parse_args()
    return (opts, args)

class RepoClosure(yum.YumBase):
    def __init__(self, arch = [], config = "/etc/yum.conf", builddeps = False):
        yum.YumBase.__init__(self)
        self.logger = logging.getLogger("yum.verbose.repoclosure")
        self.arch = arch
        self.builddeps = builddeps
        self.doConfigSetup(fn = config,init_plugins=False)
        if hasattr(self.repos, 'sqlite'):
            self.repos.sqlite = False
            self.repos._selectSackType()
    
    def evrTupletoVer(self,tuple):
        """convert and evr tuple to a version string, return None if nothing
        to convert"""
    
        e, v,r = tuple

        if v is None:
            return None
    
        val = ''
        if e is not None:
            val = '%s:%s' % (e, v)
    
        if r is not None:
            val = '%s-%s' % (val, r)
    
        return val
    
    def readMetadata(self):
        self.doRepoSetup()
        archs = []
        if not self.arch:
            archs.extend(rpmUtils.arch.getArchList())
        else:
            for arch in self.arch:
                archs.extend(rpmUtils.arch.getArchList(arch))
        # print "archs is: %s" % (archs)
        if self.builddeps and 'src' not in archs:
            archs.append('src')
        self.doSackSetup(archs)
        for repo in self.repos.listEnabled():
            self.repos.populateSack(which=[repo.id], mdtype='filelists')

    def getBrokenDeps(self, newest=False):
        unresolved = {}
        resolved = {}
        if newest:
            pkgs = self.pkgSack.returnNewestByNameArch()
        else:
            pkgs = self.pkgSack

        mypkgSack = ListPackageSack(pkgs)
        pkgtuplist = mypkgSack.simplePkgList()
        
        if self.builddeps:
            pkgs = filter(lambda x: x.arch == 'src', pkgs)

        for pkg in pkgs:
            for (req, flags, (reqe, reqv, reqr)) in pkg.returnPrco('requires'):
                if req.startswith('rpmlib'): continue # ignore rpmlib deps
            
                ver = self.evrTupletoVer((reqe, reqv, reqr))
                if resolved.has_key((req,flags,ver)):
                    continue
                try:
                    resolve_sack = self.whatProvides(req, flags, ver)
                except yum.Errors.RepoError, e:
                    pass
            
                if len(resolve_sack) < 1:
                    if not unresolved.has_key(pkg):
                        unresolved[pkg] = []
                    unresolved[pkg].append((req, flags, ver))
                    continue
                    
                if newest:
                    resolved_by_newest = False
                    for po in resolve_sack:# look through and make sure all our answers are newest-only
                        if po.pkgtup in pkgtuplist:
                            resolved_by_newest = True
                            break

                    if resolved_by_newest:                    
                        resolved[(req,flags,ver)] = 1
                    else:
                        if not unresolved.has_key(pkg):
                            unresolved[pkg] = []
                        unresolved[pkg].append((req, flags, ver))                        
                        
        return unresolved
    

def main():
    (opts, cruft) = parseArgs()
    my = RepoClosure(arch = opts.arch, config = opts.config, builddeps = opts.builddeps)

    if opts.repofrompath:
        # setup the fake repos
        for repo in opts.repofrompath:
            repoid,repopath = tuple(repo.split(','))
            if repopath[0] == '/':
                baseurl = 'file://' + repopath
            else:
                baseurl = repopath
                
            repopath = os.path.normpath(repopath)
            newrepo = yum.yumRepo.YumRepository(repoid)
            newrepo.name = repopath
            newrepo.baseurl = baseurl
            newrepo.basecachedir = my.conf.cachedir
            newrepo.metadata_expire = 0
            newrepo.timestamp_check = False
            my.repos.add(newrepo)
            my.repos.enableRepo(newrepo.id)
            my.logger.info( "Added %s repo from %s" % (repoid,repopath))
    
    if opts.repoid:
        for repo in my.repos.repos.values():
            if repo.id not in opts.repoid:
                repo.disable()
            else:
                repo.enable()
                print "Repo %s enabled " % (repo.id)

    if os.geteuid() != 0 or opts.tempcache:
        cachedir = getCacheDir()
        my.logger.info( "cachedir is %s " % (cachedir))
        if cachedir is None:
            my.logger.error("Error: Could not make cachedir, exiting")
            sys.exit(50)
            
        my.repos.setCacheDir(cachedir)

    if not opts.quiet:
        my.logger.info('Reading in repository metadata - please wait....')

    try:
        my.readMetadata()
    except yum.Errors.RepoError, e:
        my.logger.info(e)
        my.logger.info('Some dependencies may not be complete for this repository')
        my.logger.info('Run as root to get all dependencies or use -t to enable a user temp cache')

    if not opts.quiet:
        my.logger.info('Checking Dependencies')

    baddeps = my.getBrokenDeps(opts.newest)
    if opts.newest:
        num = len(my.pkgSack.returnNewestByNameArch())
    else:
        num = len(my.pkgSack)
        
    repos = my.repos.listEnabled()

    if not opts.quiet:
        my.logger.info('Repos looked at: %s' % len(repos))
        for repo in repos:
            my.logger.info('   %s' % repo)
        my.logger.info('Num Packages in Repos: %s' % num)
    
    pkgs = baddeps.keys()
    
    def sortbyname(a,b):
        return cmp(a.__str__(),b.__str__())
    
    pkgs.sort(sortbyname)
    
    for pkg in pkgs:
#        my.logger.info('package: %s from %s\n  unresolved deps: ' % (pkg, pkg.repoid))
        for (n, f, v) in baddeps[pkg]:
            req = '%s' % n
            if f: 
                flag = LETTERFLAGS[f]
                req = '%s %s'% (req, flag)
            if v:
                req = '%s %s' % (req, v)
            
            my.logger.info('package ;%s; from %s unresolved deps;%s' % (pkg, pkg.repoid,req)) # not using : for delimiter because epoch uses it 3:name

if __name__ == "__main__":
    main()