[PATCH] Allow changing the base repo.

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To change the base repo, set it up in ksdata.method and then call
payload.updateBaseRepo. If you want errors in setting up the base
repo to raise an exception instead of falling back to the default
configuration found in /etc/yum.repos.d/, pass fallback=False.

Additional improvements to media/repo handling:
- Make setup and updateMethod (almost?) completely non-interactive.
- Clear out package and group lists when disabling or removing a repo.
- Use repo-specific mount directories for NFS addon repos.
- For NFS base repo, mount the NFS share on ISO_DIR in case it ends
  up being nfsiso. If it doesn't, make a symlink at INSTALL_TREE that
  points to ISO_DIR.
- Remove fallback-to-optical-media for addons since that makes no sense.
- Don't check for an NFS mirrorlist URL since that's not possible.
---
 pyanaconda/constants.py            |    5 +-
 pyanaconda/image.py                |    2 -
 pyanaconda/packaging/__init__.py   |  112 +++++++------
 pyanaconda/packaging/yumpayload.py |  307 ++++++++++++++++++++++++++----------
 4 files changed, 295 insertions(+), 131 deletions(-)

diff --git a/pyanaconda/constants.py b/pyanaconda/constants.py
index efbfddd..6757a87 100644
--- a/pyanaconda/constants.py
+++ b/pyanaconda/constants.py
@@ -71,6 +71,7 @@ TRANSLATIONS_UPDATE_DIR="/tmp/updates/po"
 
 ANACONDA_CLEANUP = "anaconda-cleanup"
 ROOT_PATH = "/mnt/sysimage"
-ISO_DIR = "/mnt/install/isodir"
-INSTALL_TREE = "/mnt/install/source"
+MOUNT_DIR = "/mnt/install"
+ISO_DIR = MOUNT_DIR + "/isodir"
+INSTALL_TREE = MOUNT_DIR + "/source"
 BASE_REPO_NAME = "Installation Repo"
diff --git a/pyanaconda/image.py b/pyanaconda/image.py
index 7bfdb52..8c7597b 100644
--- a/pyanaconda/image.py
+++ b/pyanaconda/image.py
@@ -153,8 +153,6 @@ def mountImageDirectory(method, storage):
                     raise exn
 
 def mountImage(isodir, tree, messageWindow):
-    if os.path.ismount(tree):
-        raise SystemError, "trying to mount already-mounted iso image!"
     while True:
         image = findFirstIsoImage(isodir, messageWindow)
         if image is None:
diff --git a/pyanaconda/packaging/__init__.py b/pyanaconda/packaging/__init__.py
index 2f7d59a..89737c6 100644
--- a/pyanaconda/packaging/__init__.py
+++ b/pyanaconda/packaging/__init__.py
@@ -96,6 +96,30 @@ class PayloadInstallError(PayloadError):
     pass
 
 
+def get_mount_device(mountpoint):
+    import re
+    mounts = open("/proc/mounts").readlines()
+    mount_device = None
+    for mount in mounts:
+        try:
+            (device, path, rest) = mount.split(None, 2)
+        except ValueError:
+            continue
+
+        if path == mountpoint:
+            mount_device = device
+            break
+
+    if mount_device and re.match(r'/dev/loop\d+$', mount_device):
+        from pyanaconda.storage.devicelibs import loop
+        loop_name = os.path.basename(mount_device)
+        mount_device = loop.get_backing_file(loop_name)
+        log.debug("found backing file %s for loop device %s" % (mount_device,
+                                                                loop_name))
+
+    log.debug("%s is mounted on %s" % (mount_device, mountpoint))
+    return mount_device
+
 class Payload(object):
     """ Payload is an abstract class for OS install delivery methods. """
     def __init__(self, data):
@@ -113,6 +137,15 @@ class Payload(object):
         """Return a list of repo identifiers, not objects themselves."""
         raise NotImplementedError()
 
+    def getRepo(self, repo_id):
+        repo = None
+        for r in self.data.repo.dataList():
+            if r.name == repo_id:
+                repo = r
+                break
+
+        return repo
+
     def addRepo(self, newrepo):
         """Add the repo given by the pykickstart Repo object newrepo to the
            system.  The repo will be automatically enabled and its metadata
@@ -237,7 +270,7 @@ class Payload(object):
         if not url:
             return None
 
-        log.debug("retrieving treeinfo from %s (proxies: %s ; sslverify: %s"
+        log.debug("retrieving treeinfo from %s (proxies: %s ; sslverify: %s)"
                     % (url, proxies, sslverify))
 
         ugopts = {"ssl_verify_peer": sslverify,
@@ -292,15 +325,21 @@ class Payload(object):
         log.info("setting up device %s and mounting on %s" % (device.name,
                                                               mountpoint))
         if os.path.ismount(mountpoint):
-            log.debug("%s already has something mounted on it" % mountpoint)
-            return
+            mdev = get_mount_device(mountpoint)
+            log.warning("%s is already mounted on %s" % (mdev, mountpoint))
+            if mdev == device.path:
+                return
+            else:
+                log.info("mounting on top of it")
 
         try:
             device.setup()
             device.format.setup(mountpoint=mountpoint)
         except StorageError as e:
+            log.error("mount failed: %s" % e)
             exn = PayloadSetupError(str(e))
             if errorHandler.cb(exn) == ERROR_RAISE:
+                device.teardown(recursive=True)
                 raise exn
 
     def _setupNFS(self, mountpoint, server, path, options):
@@ -316,11 +355,11 @@ class Payload(object):
         try:
             isys.mount(url, mountpoint, options=options)
         except SystemError as e:
+            log.error("mount failed: %s" % e)
             exn = PayloadSetupError(str(e))
             if errorHandler.cb(exn) == ERROR_RAISE:
                 raise exn
 
-
     ###
     ### METHODS FOR INSTALLING THE PAYLOAD
     ###
@@ -391,24 +430,18 @@ class PackagePayload(Payload):
     """ A PackagePayload installs a set of packages onto the target system. """
     pass
 
-def show_groups():
-    ksdata = makeVersion()
-    obj = YumPayload(ksdata)
-    obj.setup()
-
-    repo = ksdata.RepoData(name="anaconda", baseurl="http://cannonball/install/rawhide/os/";)
-    obj.addRepo(repo)
+def show_groups(payload):
+    #repo = ksdata.RepoData(name="anaconda", baseurl="http://cannonball/install/rawhide/os/";)
+    #obj.addRepo(repo)
 
     desktops = []
     addons = []
 
-    for grp in obj.groups:
-        if not desktops and not addons:
-            print dir(grp)
+    for grp in payload.groups:
         if grp.endswith("-desktop"):
-            desktops.append(obj.description(grp))
+            desktops.append(payload.description(grp))
         elif not grp.endswith("-support"):
-            addons.append(obj.description(grp))
+            addons.append(payload.description(grp))
 
     import pprint
 
@@ -417,8 +450,7 @@ def show_groups():
     print "==== ADDONS ===="
     pprint.pprint(addons)
 
-    print obj.groups
-
+    print payload.groups
 
 def print_txmbrs(payload, f=None):
     if f is None:
@@ -437,7 +469,6 @@ def write_txmbrs(payload, filename):
     print_txmbrs(payload, f)
     f.close()
 
-
 ###
 ### MAIN
 ###
@@ -447,53 +478,38 @@ if __name__ == "__main__":
     import pyanaconda.storage as _storage
     import pyanaconda.platform as _platform
     from pykickstart.version import makeVersion
+    from pyanaconda.packaging.yumpayload import YumPayload
 
     # set some things specially since we're just testing
     flags.testing = True
-    global ROOT_PATH
-    ROOT_PATH = "/tmp/test-root"
 
     # set up ksdata
     ksdata = makeVersion()
-    ksdata.method.method = "url"
-    ksdata.method.url = "http://husky/install/f17/os/"; 
+
+    #ksdata.method.method = "url"
+    #ksdata.method.url = "http://husky/install/f17/os/";
     #ksdata.method.url = "http://dl.fedoraproject.org/pub/fedora/linux/development/17/x86_64/os/";
 
-    # set up storage
+    # set up storage and platform
     platform = _platform.getPlatform()
     storage = _storage.Storage(data=ksdata, platform=platform)
     storage.reset()
 
-    from pyanaconda.packaging.yumpayload import YumPayload
-
     # set up the payload
     payload = YumPayload(ksdata)
     payload.setup(storage)
 
-    payload.install_log = sys.stdout
     for repo in payload._yum.repos.repos.values():
         print repo.name, repo.enabled
 
-    #for gid in payload.groups:
-    #    payload.deselectGroup(gid)
-
-    payload.selectGroup("core")
-    payload.selectGroup("base")
-
-    payload.checkSoftwareSelection()
-    write_txmbrs(payload, "/tmp/tx.1")
-
-    payload.selectGroup("development-tools")
-    payload.selectGroup("development-libs")
-    payload.checkSoftwareSelection()
-    write_txmbrs(payload, "/tmp/tx.2")
-
-    payload.deselectGroup("development-tools")
-    payload.deselectGroup("development-libs")
-    payload.selectPackage("vim-enhanced")
-    payload.checkSoftwareSelection()
-    write_txmbrs(payload, "/tmp/tx.3")
+    ksdata.method.method = "url"
+    #ksdata.method.url = "http://husky/install/f17/os/";
+    ksdata.method.url = "http://dl.fedoraproject.org/pub/fedora/linux/development/17/x86_64/os/";
 
-    #payload.install()
-    payload.postInstall()
+    # now switch the base repo to what we set ksdata.method to just above
+    payload.updateBaseRepo(storage)
+    for repo in payload._yum.repos.repos.values():
+        print repo.name, repo.enabled
 
+    # list all of the groups
+    show_groups(payload)
diff --git a/pyanaconda/packaging/yumpayload.py b/pyanaconda/packaging/yumpayload.py
index 03085e3..42e52fa 100644
--- a/pyanaconda/packaging/yumpayload.py
+++ b/pyanaconda/packaging/yumpayload.py
@@ -23,11 +23,9 @@
 
 """
     TODO
-        - error handling!!!
         - document all methods
         - YumPayload
             - preupgrade
-            - clean up use of flags.testing
             - write test cases
             - more logging in key methods
             - rpm macros
@@ -63,6 +61,7 @@ from pyanaconda.constants import *
 from pyanaconda.flags import flags
 
 from pyanaconda import iutil
+from pyanaconda import isys
 from pyanaconda.network import hasActiveNetDev
 
 from pyanaconda.image import opticalInstallMedia
@@ -78,19 +77,50 @@ log = logging.getLogger("anaconda")
 from pyanaconda.errors import *
 #from pyanaconda.progress import progress
 
+default_repos = [productName.lower(), "rawhide"]
+
 class YumPayload(PackagePayload):
-    """ A YumPayload installs packages onto the target system using yum. """
+    """ A YumPayload installs packages onto the target system using yum.
+
+        User-defined (aka: addon) repos exist both in ksdata and in yum. They
+        are the only repos in ksdata.repo. The repos we find in the yum config
+        only exist in yum. Lastly, the base repo exists in yum and in
+        ksdata.method.
+    """
     def __init__(self, data):
         if rpm is None or yum is None:
             raise PayloadError("unsupported payload type")
 
         PackagePayload.__init__(self, data)
 
-        self._groups = []
-        self._packages = []
-
         self.install_device = None
         self.proxy = None                           # global proxy
+        self._cache_dir = "/var/cache/yum"
+        self._yum = None
+
+        self.reset()
+
+    def reset(self):
+        if self._yum:
+            self._yum.close()
+            del self._yum
+
+        if os.path.ismount(INSTALL_TREE) and not flags.testing:
+            isys.umount(INSTALL_TREE)
+
+        if os.path.islink(INSTALL_TREE):
+            os.unlink(INSTALL_TREE)
+
+        if os.path.ismount(ISO_DIR) and not flags.testing:
+            isys.umount(INSTALL_TREE)
+
+        if self.install_device:
+            self.install_device.teardown(recursive=True)
+
+        self.install_device = None
+
+        self._groups = []
+        self._packages = []
 
         self._yum = yum.YumBase()
 
@@ -98,12 +128,12 @@ class YumPayload(PackagePayload):
 
         # Set some configuration parameters that don't get set through a config
         # file.  yum will know what to do with these.
-        # XXX We have to try to set releasever before we trigger a read of the
-        #     repo config files. We do that from setup before adding any repos.
         self._yum.preconf.enabled_plugins = ["blacklist", "whiteout"]
         self._yum.preconf.fn = "/tmp/anaconda-yum.conf"
         self._yum.preconf.root = ROOT_PATH
-        self._cache_dir = "/var/cache/yum"
+        # set this now to the best default we've got ; we'll update it if/when
+        # we get a base repo set up
+        self._yum.preconf.releasever = self._getReleaseVersion(None)
 
     def setup(self, storage, proxy=None):
         buf = """
@@ -128,16 +158,7 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
         fd.close()
 
         self.proxy = proxy
-        self._configureMethod(storage)
-        self._configureRepos(storage)
-        if flags.testing:
-            self._yum.setCacheDir()
-
-        # go ahead and get metadata for all enabled repos now
-        for repoid in self.repos:
-            repo = self._yum.repos.getRepo(repoid)
-            if repo.enabled:
-                self._getRepoMetadata(repo)
+        self.updateBaseRepo(storage)
 
     ###
     ### METHODS FOR WORKING WITH REPOSITORIES
@@ -147,8 +168,12 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
         return self._yum.repos.repos.keys()
 
     @property
+    def addOns(self):
+        return [r.name for r in self.data.repo.dataList()]
+
+    @property
     def baseRepo(self):
-        repo_names = [BASE_REPO_NAME, productName.lower(), "rawhide"]
+        repo_names = [BASE_REPO_NAME] + default_repos
         base_repo_name = None
         for repo_name in repo_names:
             if repo_name in self.repos and \
@@ -168,36 +193,112 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
 
         return False
 
-    def _configureRepos(self, storage):
-        """ Configure the initial repository set. """
-        log.info("configuring repos")
-        # FIXME: driverdisk support
+    def _resetMethod(self):
+        self.data.method.method = ""
+        self.data.method.url = None
+        self.data.method.server = None
+        self.data.method.dir = None
+        self.data.method.partition = None
+        self.data.method.biospart = None
+        self.data.method.noverifyssl = False
+        self.data.method.proxy = ""
+        self.data.method.opts = None
+
+    def updateBaseRepo(self, storage, fallback=True):
+        """ Update the base repo based on self.data.method.
+
+            - Tear down any previous base repo devices, symlinks, &c.
+            - Reset the YumBase instance.
+            - Try to convert the new method to a base repo.
+            - If that fails, we'll use whatever repos yum finds in the config.
+            - Set up addon repos.
+            - Filter out repos that don't make sense to have around.
+            - Get metadata for all enabled repos, disabling those for which the
+              retrieval fails.
+        """
+        log.info("updating base repo")
 
-        # add/enable the repos anaconda knows about
-        # identify repos based on ksdata.
-        for repo in self.data.repo.dataList():
-            self._configureKSRepo(storage, repo)
+        # start with a fresh YumBase instance
+        self.reset()
+
+        # see if we can get a usable base repo from self.data.method
+        try:
+            self._configureBaseRepo(storage)
+        except PayloadError as e:
+            log.error("failed to set up base repo: %s" % e)
+            if not fallback:
+                # XXX this leaves the configuration exactly as specified in the
+                #     on-disk yum configuration
+                raise
 
-        # remove/disable repos that don't make sense during system install.
-        # If a method was given, disable any repos that aren't in ksdata.
+            self._resetMethod()
+
+        if BASE_REPO_NAME not in self._yum.repos.repos.keys():
+            log.info("using default repos from local yum configuration")
+
+        # set up addon repos
+        # FIXME: driverdisk support
+        for repo in self.data.repo.dataList():
+            try:
+                self.configureAddOnRepo(repo)
+            except NoNetworkError as e:
+                log.error("repo %s needs an active network connection"
+                          % repo.name)
+                self.removeRepo(repo.name)
+            except PayloadError as e:
+                log.error("repo %s setup failed: %s" % (repo.name, e))
+                self.removeRepo(repo.name)
+
+        # now disable and/or remove any repos that don't make sense
         for repo in self._yum.repos.repos.values():
+            """ Rules for which repos to enable/disable/remove
+
+                - always remove
+                    - source, debuginfo
+                - remove if isFinal
+                    - rawhide, development
+                - remove any repo when not isFinal and repo not enabled
+                - if a base repo is defined, disable any repo not defined by
+                  the user that is not the base repo
+
+            """
+            if repo.id in self.addOns:
+                continue
+
             if "-source" in repo.id or "-debuginfo" in repo.id:
-                log.info("excluding source or debug repo %s" % repo.id)
-                self.removeRepo(repo.id)
+                self._removeYumRepo(repo.id)
             elif isFinal and ("rawhide" in repo.id or "development" in repo.id):
-                log.info("excluding devel repo %s for non-devel anaconda" % repo.id)
-                self.removeRepo(repo.id)
+                self._removeYumRepo(repo.id)
             elif not isFinal and not repo.enabled:
-                log.info("excluding disabled repo %s for prerelease" % repo.id)
-                self.removeRepo(repo.id)
+                self._removeYumRepo(repo.id)
             elif self.data.method.method and \
                  repo.id != BASE_REPO_NAME and \
                  repo.id not in [r.name for r in self.data.repo.dataList()]:
-                log.info("disabling repo %s" % repo.id)
+                # if a method/repo was given, disable all default repos
                 self.disableRepo(repo.id)
 
-    def _configureMethod(self, storage):
-        """ Configure the base repo. """
+        # now go through and get metadata for all enabled repos
+        for repo_id in self.repos:
+            repo = self._yum.repos.getRepo(repo_id)
+            if repo.enabled:
+                try:
+                    self._getRepoMetadata(repo)
+                except PayloadError as e:
+                    log.error("failed to grab repo metadata for %s: %s"
+                              % (repo_id, e))
+                    self.disableRepo(repo_id)
+
+        self._applyYumSelections()
+
+    def _configureBaseRepo(self, storage):
+        """ Configure the base repo.
+
+            If self.data.method.method is set, failure to configure a base repo
+            should generate a PayloadError exception.
+
+            If self.data.method.method is unset, no exception should be raised
+            and no repo should be configured.
+        """
         log.info("configuring base repo")
         # set up the main repo specified by method=, repo=, or ks method
         # XXX FIXME: does this need to handle whatever was set up by dracut?
@@ -225,9 +326,8 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
 
             image = findFirstIsoImage(path)
             if not image:
-                exn = PayloadSetupError("failed to find valid iso image")
-                if errorHandler.cb(exn) == ERROR_RAISE:
-                    raise exn
+                device.teardown(recursive=True)
+                raise PayloadSetupError("failed to find valid iso image")
 
             if path.endswith(".iso"):
                 path = os.path.dirname(path)
@@ -239,10 +339,9 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
             self.install_device = device
             url = "file://" + INSTALL_TREE
         elif method.method == "nfs":
-            # XXX what if we mount it on ISO_DIR and then create a symlink
-            #     if there are no isos instead of the remount?
-            self._setupNFS(INSTALL_TREE, method.server, method.dir,
-                           method.opts)
+            # Mount the NFS share on ISO_DIR. If it ends up not being nfsiso we
+            # will create a symlink at INSTALL_TREE pointing to ISO_DIR.
+            self._setupNFS(ISO_DIR, method.server, method.dir, method.opts)
 
             # check for ISO images in the newly mounted dir
             path = ISO_DIR
@@ -256,13 +355,19 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
             # it appears there are ISO images in the dir, so assume they want to
             # install from one of them
             if image:
-                isys.umount(INSTALL_TREE)
-                self._setupNFS(ISO_DIR, method.server, method.path,
-                               method.options)
-
                 # mount the ISO on a loop
                 image = os.path.normpath("%s/%s" % (ISO_DIR, image))
                 mountImage(image, INSTALL_TREE)
+            else:
+                # create a symlink at INSTALL_TREE that points to ISO_DIR
+                try:
+                    if os.path.exists(INSTALL_TREE):
+                        os.unlink(INSTALL_TREE)
+                    os.symlink(os.path.basename(ISO_DIR), INSTALL_TREE)
+                except OSError as e:
+                    log.error("failed to update %s symlink: %s"
+                              % (INSTALL_TREE, e))
+                    raise PayloadSetupError(str(e))
 
             url = "file://" + INSTALL_TREE
         elif method.method == "url":
@@ -270,33 +375,35 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
             sslverify = not (method.noverifyssl or flags.noverifyssl)
             proxy = method.proxy or self.proxy
         elif method.method == "cdrom" or not method.method:
+            # cdrom or no method specified -- check for media
             device = opticalInstallMedia(storage.devicetree)
             if device:
                 self.install_device = device
                 url = "file://" + INSTALL_TREE
                 if not method.method:
                     method.method = "cdrom"
-
-        self._yum.preconf.releasever = self._getReleaseVersion(url)
+            elif method.method == "cdrom":
+                raise PayloadSetupError("no usable optical media found")
 
         if method.method:
-            # FIXME: handle MetadataError
-            self._addYumRepo(BASE_REPO_NAME, url,
-                             proxy=proxy, sslverify=sslverify)
+            try:
+                self._addYumRepo(BASE_REPO_NAME, url,
+                                 proxy=proxy, sslverify=sslverify)
+            except MetadataError as e:
+                self._removeYumRepo(BASE_REPO_NAME)
+                raise
+            else:
+                self._yum.preconf.releasever = self._getReleaseVersion(url)
 
-    def _configureKSRepo(self, storage, repo):
+    def configureAddOnRepo(self, repo):
         """ Configure a single ksdata repo. """
-        url = getattr(repo, "baseurl", repo.mirrorlist)
-        if url.startswith("nfs:"):
-            # FIXME: create a directory other than INSTALL_TREE based on
-            #        the repo's id/name to avoid crashes if the base repo is NFS
+        url = repo.baseurl
+        if url and url.startswith("nfs:"):
             (opts, server, path) = iutil.parseNfsUrl(url)
-            self._setupNFS(INSTALL_TREE, server, path, opts)
-        else:
-            # check for media, fall back to default repo
-            device = opticalInstallMedia(storage.devicetree)
-            if device:
-                self.install_device = device
+            mountpoint = "%s/%s.nfs" % (MOUNT_DIR, repo.name)
+            self._setupNFS(mountpoint, server, path, opts)
+
+            url = "file://" + mountpoint
 
         if self._repoNeedsNetwork(repo) and not hasActiveNetDev():
             raise NoNetworkError
@@ -304,12 +411,35 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
         proxy = repo.proxy or self.proxy
         sslverify = not (flags.noverifyssl or repo.noverifyssl)
 
-        # this repo does not go into ksdata -- only yum
-        self.addYumRepo(repo.id, repo.baseurl, repo.mirrorlist, cost=repo.cost,
-                        exclude=repo.excludepkgs, includepkgs=repo.includepkgs,
-                        proxy=proxy, sslverify=sslverify)
+        # this repo is already in ksdata, so we only add it to yum here
+        self._addYumRepo(repo.name, url, repo.mirrorlist, cost=repo.cost,
+                         exclude=repo.excludepkgs, includepkgs=repo.includepkgs,
+                         proxy=proxy, sslverify=sslverify)
 
-        # TODO: enable addons
+        # TODO: enable addons via treeinfo
+
+    def _applyYumSelections(self):
+        """ Apply the selections in ksdata to yum.
+
+            This follows the same ordering/pattern as kickstart.py.
+        """
+        for package in self.data.packages.packageList:
+            self.selectPackage(package)
+
+        for group in self.data.packages.groupList:
+            if group.include == GROUP_DEFAULT:
+                default = True
+            elif group.include == GROUP_ALL:
+                default = True
+                optional = True
+
+            self.selectGroup(group.name, default=default, optional=optional)
+
+        for package in self.data.packages.excludedList:
+            self.deselectPackage(package)
+
+        for group in self.data.packages.excludedGroupList:
+            self.deselectGroup(group.name)
 
     def _getRepoMetadata(self, yumrepo):
         """ Retrieve repo metadata if we don't already have it. """
@@ -318,6 +448,7 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
         # And try to grab its metadata.  We do this here so it can be done
         # on a per-repo basis, so we can then get some finer grained error
         # handling and recovery.
+        log.debug("getting repo metadata for %s" % yumrepo.id)
         try:
             yumrepo.getPrimaryXML()
             yumrepo.getOtherXML()
@@ -328,6 +459,7 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
         # At the worst, it just means the groups won't be displayed in the UI
         # which isn't too bad, because you may be doing a kickstart install and
         # picking packages instead.
+        log.debug("getting group info for %s" % yumrepo.id)
         try:
             yumrepo.getGroups()
         except RepoMDError:
@@ -339,12 +471,6 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
         if name in self._yum.repos.repos:
             self._yum.repos.delete(name)
 
-        # Replace anything other than HTTP/FTP with file://
-        if baseurl and \
-           not baseurl.startswith("http:") and \
-           not baseurl.startswith("ftp:"):
-            baseurl = "file://" + INSTALL_TREE
-
         log.debug("adding yum repo %s with baseurl %s and mirrorlist %s"
                     % (name, baseurl, mirrorlist))
         # Then add it to yum's internal structures.
@@ -367,14 +493,34 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
         self._addYumRepo(newrepo)   # FIXME: handle MetadataError
         super(YumRepo, self).addRepo(newrepo)
 
+    def _removeYumRepo(self, repo_id):
+        if repo_id in self.repos:
+            self._yum.repos.delete(repo_id)
+
+            self._groups = []
+            self._packages = []
+
     def removeRepo(self, repo_id):
         """ Remove a repo as specified by id. """
         log.debug("removing repo %s" % repo_id)
-        if repo_id in self.repos:
-            self._yum.repos.delete(repo_id)
 
+        # if this is an NFS repo, we'll want to unmount the NFS mount after
+        # removing the repo
+        mountpoint = None
+        yum_repo = self._yum.repos.getRepo(repo_id)
+        ks_repo = self.getRepo(repo_id)
+        if yum_repo and ks_repo and ks_repo.baseurl.startswith("nfs:"):
+            mountpoint = yum_repo.baseurl[0][7:]    # strip leading "file://"
+
+        self._removeYumRepo(repo_id)
         super(YumPayload, self).removeRepo(repo_id)
 
+        if mountpoint and os.path.ismount(mountpoint):
+            try:
+                isys.umount(mountpoint)
+            except SystemError as e:
+                log.error("failed to unmount nfs repo %s: %s" % (mountpoint, e))
+
     def enableRepo(self, repo_id):
         """ Enable a repo as specified by id. """
         log.debug("enabling repo %s" % repo_id)
@@ -387,6 +533,9 @@ reposdir=/etc/yum.repos.d,/etc/anaconda.repos.d,/tmp/updates/anaconda.repos.d,/t
         if repo_id in self.repos:
             self._yum.repos.disableRepo(repo_id)
 
+            self._groups = []
+            self._packages = []
+
     ###
     ### METHODS FOR WORKING WITH GROUPS
     ###
-- 
1.7.9.3

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