I'm checking out this code provided by python_apt
but it appears to be a bit outdated:
https://github.com/jolicloud/python-apt/blob/master/doc/examples/inst.py
All I'm attempting to do here is follow the progress of the commit()
method; currently when we call commit()
and pass in fprogress
and iprogress
, I can see on the console that all packages in the pkg_list
are downloaded correctly, the problem appears to come after this.
Program continues execution and it doesn't trigger dpkg_status_change()
as I believe it should?
I have no way of knowing if the installation of multiple packages was a success?
import apt
from apt.progress.base import InstallProgress
class InstallStatusUpdate(InstallProgress):
def conffile(self, current, new):
print "conffile prompt: %s %s" % (current, new)
def processing(self, pkg, stage):
print "Processing ", pkg, " stage: ", stage
def error(self, pkg, errormsg):
print "Package ", pkg, " error: ", errormsg
def finish_update(self):
print "Installation is complete"
def status_change(self, pkg, percent, status):
print "Package: ", pkg, " at ", percent, " -> ", status
def dpkg_status_change(self, pkg, status):
print "Package ", pkg, ", Status: ", status
def install_updates(self, pkg_list):
fprogress = apt.progress.TextFetchProgress()
iprogress = InstallStatusUpdate()
cache_tmp = apt.Cache()
cache_tmp.update()
cache_tmp.open(None)
for pkg in pkg_list:
try:
self.pkgname = cache_tmp[pkg.name]
if self.pkgname.is_installed and self.pkgname.is_upgradable:
self.pkgname.mark_upgrade()
else:
self.pkgname.mark_install()
except Exception as e:
print e.message
result = self.pkgname.commit(fprogress, iprogress)
#Maybe i'm doing something wrong here but result always = None...
Apparently working with python_apt
commit()
is a pain, I ended up using subprocess
to wait for everything to finish (like it should be) and parse the output at the end to verify that the package was indeed upgraded.
In _apt_update()
i check to make sure the system is online before attempting a apt-get update
, then proceed with he installation of the package passed in to _apt_install().
def _apt_update(self):
import urllib2
try:
response = urllib2.urlopen('http://74.125.113.99', timeout=1)
#We have internet access
subprocess.Popen(['apt-get', 'update'])
return True
except urllib2.URLError as err: pass
return False
def _apt_install(self, pkg, update=True):
upgraded = 0
if update == True:
self._apt_update()
proc = subprocess.Popen(['apt-get', 'install', pkg, "-y"], stdout=subprocess.PIPE)
for line in proc.stdout:
if "upgraded" in line and "newly installed" in line and "to remove" in line:
values = line.split(",")
for pos in values:
key, value = pos.split(" ")
if value == "upgraded":
upgraded = int(key)
break
print "Upgraded OK (", upgraded, ")"
if upgraded > 0:
return True
else:
return False
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