pkgplan.py revision 289
#!/usr/bin/python
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
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#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
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#
# Copyright 2008 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
import errno
import itertools
import os
import pkg.manifest as manifest
import pkg.client.filelist as filelist
class PkgPlan(object):
"""A package plan takes two package FMRIs and an Image, and produces the
set of actions required to take the Image from the origin FMRI to the
destination FMRI.
If the destination FMRI is None, the package is removed.
"""
def __init__(self, image, progtrack):
self.origin_fmri = None
self.destination_fmri = None
self.origin_mfst = manifest.null
self.destination_mfst = manifest.null
self.image = image
self.progtrack = progtrack
self.actions = []
self.xfersize = -1
self.xferfiles = -1
self.origin_filters = []
self.destination_filters = []
def __str__(self):
s = "%s -> %s\n" % (self.origin_fmri, self.destination_fmri)
for src, dest in itertools.chain(*self.actions):
s += " %s -> %s\n" % (src, dest)
return s
def propose_destination(self, fmri, mfst):
self.destination_fmri = fmri
self.destination_mfst = mfst
if self.image.install_file_present(fmri):
raise RuntimeError, "already installed"
def propose_removal(self, fmri, mfst):
self.origin_fmri = fmri
self.origin_mfst = mfst
if not self.image.install_file_present(fmri):
raise RuntimeError, "not installed"
def get_actions(self):
raise NotImplementedError()
def get_nactions(self):
return len(self.actions[0]) + len(self.actions[1]) + \
len(self.actions[2])
def evaluate(self, filters = []):
"""Determine the actions required to transition the package."""
# if origin unset, determine if we're dealing with an previously
# installed version or if we're dealing with the null package
#
# XXX Perhaps make the pkgplan creator make this explicit, so we
# don't have to check?
f = None
if not self.origin_fmri:
f = self.image.older_version_installed(
self.destination_fmri)
if f:
self.origin_fmri = f
self.origin_mfst = self.image.get_manifest(f)
self.destination_filters = filters
# Try to load the filter used for the last install of the
# package.
self.origin_filters = []
if self.origin_fmri:
try:
f = file("%s/pkg/%s/filters" % \
(self.image.imgdir,
self.origin_fmri.get_dir_path()), "r")
except EnvironmentError, e:
if e.errno != errno.ENOENT:
raise
else:
self.origin_filters = [
(l.strip(), compile(
l.strip(), "<filter string>", "eval"))
for l in f.readlines()
]
self.destination_mfst.filter(self.destination_filters)
self.origin_mfst.filter(self.origin_filters)
# Assume that origin actions are unique, but make sure that
# destination ones are.
ddups = self.destination_mfst.duplicates()
if ddups:
raise RuntimeError, ["Duplicate actions", ddups]
self.actions = self.destination_mfst.difference(
self.origin_mfst)
# over the list of update actions, check for any that are the
# target of hardlink actions, and add the renewal of those hardlinks
# to the install set
link_actions = self.image.get_link_actions()
# iterate over copy since we're appending to list
for a in self.actions[1][:]:
if a[1].name == "file" and a[1].attrs["path"] in link_actions:
la = link_actions[a[1].attrs["path"]]
self.actions[1].extend([(a, a) for a in la])
def get_xferstats(self):
if self.xfersize != -1:
return (self.xferfiles, self.xfersize)
self.xfersize = 0
self.xferfiles = 0
for src, dest in itertools.chain(*self.actions):
if dest and dest.needsdata(src):
self.xfersize += \
int(dest.attrs.get("pkg.size", 0))
self.xferfiles += 1
return (self.xferfiles, self.xfersize)
def will_xfer(self):
nf, nb = self.get_xferstats()
if nf > 0:
return True
else:
return False
def get_xfername(self):
if self.destination_fmri:
return self.destination_fmri.get_name()
if self.origin_fmri:
return self.origin_fmri.get_name()
return None
def preexecute(self):
"""Perform actions required prior to installation or removal of a package.
This method executes each action's preremove() or preinstall()
methods, as well as any package-wide steps that need to be taken
at such a time.
"""
flist = None
flist_supported = True
if flist_supported:
self.progtrack.download_start_pkg(self.get_xfername())
# retrieval step
if self.destination_fmri == None:
self.image.remove_install_file(self.origin_fmri)
try:
os.unlink("%s/pkg/%s/filters" % (
self.image.imgdir,
self.origin_fmri.get_dir_path()))
except EnvironmentError, e:
if e.errno != errno.ENOENT:
raise
for src, dest in itertools.chain(*self.actions):
if dest:
dest.preinstall(self, src)
else:
src.preremove(self)
if dest and dest.needsdata(src) and flist_supported:
if flist and flist.is_full():
try:
flist.get_files()
self.progtrack.download_add_progress(flist.get_nfiles(), flist.get_nbytes())
except filelist.FileListException:
flist_supported = False
flist = None
continue
flist = None
if flist is None:
flist = filelist.FileList(
self.image,
self.destination_fmri)
flist.add_action(dest)
# Get any remaining files
if flist:
try:
flist.get_files()
self.progtrack.download_add_progress(flist.get_nfiles(), flist.get_nbytes())
except filelist.FileListException:
pass
flist = None
if flist_supported:
self.progtrack.download_end_pkg()
def gen_install_actions(self):
for src, dest in self.actions[0]:
yield src, dest
def gen_removal_actions(self):
for src, dest in self.actions[2]:
yield src, dest
def gen_update_actions(self):
for src, dest in self.actions[1]:
yield src, dest
def execute_install(self, src, dest):
""" perform action for installation of package"""
try:
dest.install(self, src)
except Exception, e:
print "Action install failed for '%s' (%s):\n %s: %s" % \
(dest.attrs.get(dest.key_attr, id(dest)),
self.destination_fmri.get_pkg_stem(),
e.__class__.__name__, e)
raise
def execute_update(self, src, dest):
""" handle action updates"""
try:
dest.install(self, src)
except Exception, e:
print "Action upgrade failed for '%s' (%s):\n %s: %s" % \
(dest.attrs.get(dest.key_attr, id(dest)),
self.destination_fmri.get_pkg_stem(),
e.__class__.__name__, e)
raise
def execute_removal(self, src, dest):
""" handle action removals"""
try:
src.remove(self)
except Exception, e:
print "Action removal failed for '%s' (%s):\n %s: %s" % \
(src.attrs.get(src.key_attr, id(src)),
self.origin_fmri.get_pkg_stem(),
e.__class__.__name__, e)
raise
def postexecute(self):
"""Perform actions required after installation or removal of a package.
This method executes each action's postremove() or postinstall()
methods, as well as any package-wide steps that need to be taken
at such a time.
"""
# record that package states are consistent
for src, dest in itertools.chain(*self.actions):
if dest:
dest.postinstall(self, src)
else:
src.postremove(self)
# In the case of an upgrade, remove the installation turds from
# the origin's directory.
# XXX should this just go in preexecute?
if self.origin_fmri != None and self.destination_fmri != None:
self.image.remove_install_file(self.origin_fmri)
try:
os.unlink("%s/pkg/%s/filters" % (
self.image.imgdir,
self.origin_fmri.get_dir_path()))
except EnvironmentError, e:
if e.errno != errno.ENOENT:
raise
if self.destination_fmri != None:
self.image.add_install_file(self.destination_fmri)
# Save the filters we used to install the package, so
# they can be referenced later.
if self.destination_filters:
f = file("%s/pkg/%s/filters" % \
(self.image.imgdir,
self.destination_fmri.get_dir_path()), "w")
f.writelines([
myfilter + "\n"
for myfilter, code in self.destination_filters
])
f.close()