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- # Progress.py - progress reporting classes
- #
- # Copyright (c) 2005 Canonical
- #
- # Author: Michael Vogt <michael.vogt@ubuntu.com>
- #
- # 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 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
- """progress reporting classes.
-
- This module provides classes for progress reporting. They can be used with
- e.g., for reporting progress on the cache opening process, the cache update
- progress, or the package install progress.
- """
-
- import errno
- import fcntl
- import os
- import re
- import select
- import sys
-
- import apt_pkg
-
-
- __all__ = ('CdromProgress', 'DpkgInstallProgress', 'DumbInstallProgress',
- 'FetchProgress', 'InstallProgress', 'OpProgress', 'OpTextProgress',
- 'TextFetchProgress')
-
-
- class OpProgress(object):
- """Abstract class to implement reporting on cache opening.
-
- Subclass this class to implement simple Operation progress reporting.
- """
-
- def __init__(self):
- self.op = None
- self.subOp = None
-
- def update(self, percent):
- """Called periodically to update the user interface."""
-
- def done(self):
- """Called once an operation has been completed."""
-
-
- class OpTextProgress(OpProgress):
- """A simple text based cache open reporting class."""
-
- def __init__(self):
- OpProgress.__init__(self)
-
- def update(self, percent):
- """Called periodically to update the user interface."""
- sys.stdout.write("\r%s: %.2i " % (self.subOp, percent))
- sys.stdout.flush()
-
- def done(self):
- """Called once an operation has been completed."""
- sys.stdout.write("\r%s: Done\n" % self.op)
-
-
- class FetchProgress(object):
- """Report the download/fetching progress.
-
- Subclass this class to implement fetch progress reporting
- """
-
- # download status constants
- dlDone = 0
- dlQueued = 1
- dlFailed = 2
- dlHit = 3
- dlIgnored = 4
- dlStatusStr = {dlDone: "Done",
- dlQueued: "Queued",
- dlFailed: "Failed",
- dlHit: "Hit",
- dlIgnored: "Ignored"}
-
- def __init__(self):
- self.eta = 0.0
- self.percent = 0.0
- # Make checking easier
- self.currentBytes = 0
- self.currentItems = 0
- self.totalBytes = 0
- self.totalItems = 0
- self.currentCPS = 0
-
- def start(self):
- """Called when the fetching starts."""
-
- def stop(self):
- """Called when all files have been fetched."""
-
- def updateStatus(self, uri, descr, shortDescr, status):
- """Called when the status of an item changes.
-
- This happens eg. when the downloads fails or is completed.
- """
-
- def pulse(self):
- """Called periodically to update the user interface.
-
- Return True to continue or False to cancel.
- """
- self.percent = (((self.currentBytes + self.currentItems) * 100.0) /
- float(self.totalBytes + self.totalItems))
- if self.currentCPS > 0:
- self.eta = ((self.totalBytes - self.currentBytes) /
- float(self.currentCPS))
- return True
-
- def mediaChange(self, medium, drive):
- """react to media change events."""
-
-
- class TextFetchProgress(FetchProgress):
- """ Ready to use progress object for terminal windows """
-
- def __init__(self):
- FetchProgress.__init__(self)
- self.items = {}
-
- def updateStatus(self, uri, descr, shortDescr, status):
- """Called when the status of an item changes.
-
- This happens eg. when the downloads fails or is completed.
- """
- if status != self.dlQueued:
- print "\r%s %s" % (self.dlStatusStr[status], descr)
- self.items[uri] = status
-
- def pulse(self):
- """Called periodically to update the user interface.
-
- Return True to continue or False to cancel.
- """
- FetchProgress.pulse(self)
- if self.currentCPS > 0:
- s = "[%2.f%%] %sB/s %s" % (self.percent,
- apt_pkg.SizeToStr(int(self.currentCPS)),
- apt_pkg.TimeToStr(int(self.eta)))
- else:
- s = "%2.f%% [Working]" % (self.percent)
- print "\r%s" % (s),
- sys.stdout.flush()
- return True
-
- def stop(self):
- """Called when all files have been fetched."""
- print "\rDone downloading "
-
- def mediaChange(self, medium, drive):
- """react to media change events."""
- print ("Media change: please insert the disc labeled "
- "'%s' in the drive '%s' and press enter") % (medium, drive)
-
- return raw_input() not in ('c', 'C')
-
-
- class DumbInstallProgress(object):
- """Report the install progress.
-
- Subclass this class to implement install progress reporting.
- """
-
- def startUpdate(self):
- """Start update."""
-
- def run(self, pm):
- """Start installation."""
- return pm.DoInstall()
-
- def finishUpdate(self):
- """Called when update has finished."""
-
- def updateInterface(self):
- """Called periodically to update the user interface"""
-
-
- class InstallProgress(DumbInstallProgress):
- """An InstallProgress that is pretty useful.
-
- It supports the attributes 'percent' 'status' and callbacks for the dpkg
- errors and conffiles and status changes.
- """
-
- def __init__(self):
- DumbInstallProgress.__init__(self)
- self.selectTimeout = 0.1
- (read, write) = os.pipe()
- self.writefd = write
- self.statusfd = os.fdopen(read, "r")
- fcntl.fcntl(self.statusfd.fileno(), fcntl.F_SETFL, os.O_NONBLOCK)
- self.read = ""
- self.percent = 0.0
- self.status = ""
-
- def error(self, pkg, errormsg):
- """Called when a error is detected during the install."""
-
- def conffile(self, current, new):
- """Called when a conffile question from dpkg is detected."""
-
- def statusChange(self, pkg, percent, status):
- """Called when the status changed."""
-
- def updateInterface(self):
- """Called periodically to update the interface."""
- if self.statusfd is None:
- return
- try:
- while not self.read.endswith("\n"):
- self.read += os.read(self.statusfd.fileno(), 1)
- except OSError, (errno_, errstr):
- # resource temporarly unavailable is ignored
- if errno_ != errno.EAGAIN and errno_ != errno.EWOULDBLOCK:
- print errstr
- if not self.read.endswith("\n"):
- return
-
- s = self.read
- #print s
- try:
- (status, pkg, percent, status_str) = s.split(":", 3)
- except ValueError:
- # silently ignore lines that can't be parsed
- self.read = ""
- return
- #print "percent: %s %s" % (pkg, float(percent)/100.0)
- if status == "pmerror":
- self.error(pkg, status_str)
- elif status == "pmconffile":
- # we get a string like this:
- # 'current-conffile' 'new-conffile' useredited distedited
- match = re.match("\s*\'(.*)\'\s*\'(.*)\'.*", status_str)
- if match:
- self.conffile(match.group(1), match.group(2))
- elif status == "pmstatus":
- if float(percent) != self.percent or status_str != self.status:
- self.statusChange(pkg, float(percent),
- status_str.strip())
- self.percent = float(percent)
- self.status = status_str.strip()
- self.read = ""
-
- def fork(self):
- """Fork."""
- return os.fork()
-
- def waitChild(self):
- """Wait for child progress to exit."""
- while True:
- select.select([self.statusfd], [], [], self.selectTimeout)
- self.updateInterface()
- (pid, res) = os.waitpid(self.child_pid, os.WNOHANG)
- if pid == self.child_pid:
- break
- return res
-
- def run(self, pm):
- """Start installing."""
- pid = self.fork()
- if pid == 0:
- # child
- res = pm.DoInstall(self.writefd)
- os._exit(res)
- self.child_pid = pid
- res = self.waitChild()
- return os.WEXITSTATUS(res)
-
-
- class CdromProgress(object):
- """Report the cdrom add progress.
-
- Subclass this class to implement cdrom add progress reporting.
- """
-
- def __init__(self):
- pass
-
- def update(self, text, step):
- """Called periodically to update the user interface."""
-
- def askCdromName(self):
- """Called to ask for the name of the cdrom."""
-
- def changeCdrom(self):
- """Called to ask for the cdrom to be changed."""
-
-
- class DpkgInstallProgress(InstallProgress):
- """Progress handler for a local Debian package installation."""
-
- def run(self, debfile):
- """Start installing the given Debian package."""
- self.debfile = debfile
- self.debname = os.path.basename(debfile).split("_")[0]
- pid = self.fork()
- if pid == 0:
- # child
- res = os.system("/usr/bin/dpkg --status-fd %s -i %s" % \
- (self.writefd, self.debfile))
- os._exit(os.WEXITSTATUS(res))
- self.child_pid = pid
- res = self.waitChild()
- return res
-
- def updateInterface(self):
- """Process status messages from dpkg."""
- if self.statusfd is None:
- return
- while True:
- try:
- self.read += os.read(self.statusfd.fileno(), 1)
- except OSError, (errno_, errstr):
- # resource temporarly unavailable is ignored
- if errno_ != 11:
- print errstr
- break
- if not self.read.endswith("\n"):
- continue
-
- statusl = self.read.split(":")
- if len(statusl) < 3:
- print "got garbage from dpkg: '%s'" % self.read
- self.read = ""
- break
- status = statusl[2].strip()
- #print status
- if status == "error":
- self.error(self.debname, status)
- elif status == "conffile-prompt":
- # we get a string like this:
- # 'current-conffile' 'new-conffile' useredited distedited
- match = re.match("\s*\'(.*)\'\s*\'(.*)\'.*", statusl[3])
- if match:
- self.conffile(match.group(1), match.group(2))
- else:
- self.status = status
- self.read = ""
-