4 messages in org.freebsd.freebsd-questionsRe: python script to backup installed...| From | Sent On | Attachments |
|---|---|---|
| Adam Vande More | Feb 11, 2010 8:14 am | |
| Giorgos Keramidas | Feb 11, 2010 11:30 am | |
| Adam Vande More | Feb 11, 2010 6:34 pm | |
| Giorgos Keramidas | Feb 11, 2010 7:30 pm |
| Subject: | Re: python script to backup installed packages | |
|---|---|---|
| From: | Giorgos Keramidas (kera...@ceid.upatras.gr) | |
| Date: | Feb 11, 2010 11:30:56 am | |
| List: | org.freebsd.freebsd-questions | |
On Thu, 11 Feb 2010 10:15:12 -0600, Adam Vande More <amva...@gmail.com>
wrote:
Sometimes you have need to backup installed packages. I realize most port management tools do this automatically, but if you're on a system with a lot of packages installed and one port management tool fails and you use another to fix it, /usr/ports/packages can become jumbled.
Anyways, I've written a simple python script which will create a fresh snapshot of all installed packages. These are convenient for backups or installing on a new system.
For anyone interested:
from subprocess import Popen, PIPE import os s = Popen('pkg_info -a | grep : | grep Information',shell=True,stdout=PIPE).communicate()[0]
pkg_location = '/data/packages'
packages = [] for line in s.split('\n'): info = line.replace('Information for ', '').replace(':','') packages.append(info)
os.chdir(pkg_location)
for package in packages: s = Popen('pkg_create -b ' + package,shell=True,stdout=PIPE).communicate()[0]
Nice script!
My own version was initially written in sh(1) to avoid having a Python dependency. Then I rewrote it in Python too. FWIW, you can probably save a few replace() calls and avoid the need for a full array of all the packages by yielding the package names:
from subprocess import PIPE, Popen as popen
def listpackages():
for l in iter(popen("pkg_info", shell=True,
stdout=PIPE).stdout.readline, ""):
yield l.split()[0]
for p in listpackages(): dostuff(p)
My own version groks an os.environ['EXTRA_PKG_CREATE_ARGS'] option too and inserts the extra options before the ["-b", "package"] arguments of pkg_create, so that I can run the script for example with:
env EXTRA_PKG_CREATE_ARGS='-Rvn' ./savepkg.py
This way package dependencies are saved too (-R option), the output of the `pkg_create -b' command is slightly more verbose, and saving the same package multiple times doesn't overwrite existing packages of the same version (-n option).
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