I got really tired of the monotony that I go through daily to put a
new build on my USB drive. The attached script is my moderately
robust solution to the problem, and I thought that others might care
to take it for a spin as well. Here's the usage (you can also view
usage with -h or --help):
Usage:
sugar-update.oy [-lLsv] [-b build] [directory]
Description:
This script will download an autoinstallation image (.img and .crc) to
the specified [directory]. Any images already present within this
directory will be deleted before the download begins. If no directory is
specified, the current working directory will be used.
Options:
-b Specify a build number; defaults to latest development build
-l Print the associated change log
-L Print the change log without performing a download
-s Download the latest stable build; overrides the -b option
-v Verbose
Common Example:
sugar-update.py -vl /Volumes/MyFlashDrive/boot/
Feel free to add functionality and/or robustness. I may add support
for downloading a firmware update in the future, but it wasn't on my
requirements list for today. I hope others find it useful, even if it
is soon outdated by some fancy built-in auto-update jazz.
- Eben
"""
sugar-update.py
Created by Eben Eliason on 2007-08-28.
Please feel free to modify, extend, and redistribute this script
"""
import sys
import os
import getopt
import re
import urllib2
#define help output ---------------------------------------------------------
def usage():
print '\nUsage: sugar-update.py [-lLsv] [-b build] [directory]\n'
print 'Description:\n'
print '\tThis script will download an autoinstallation image (.img and .crc files) into the specified'
print '\t[directory]. Any images already present within the this directory will be deleted before the'
print '\tdownload begins. If no directory is specified, the current working directory will be used.\n'
print 'Options:\n'
print '\t -b\tNUM\tSpecify a build number; defaults to latest development build\n'
print '\t -l\t\tPrint the associated change log\n'
print '\t -L\t\tPrint the change log for the specified build without performing a download\n'
print '\t -s\t\tDownload the latest stable build; overrides the -b option\n'
print '\t -v\t\tVerbose\n'
#check for valid arguments
try:
opts,arg = getopt.getopt(sys.argv[1:], "vslLb:")
except:
usage()
sys.exit(2)
#global constants -----------------------------------------------------------
LATEST = "latest"
STABLE = "LATEST-STABLE-BUILD"
build = ""
build_path = LATEST
boot_path = os.getcwd() + '/'
verbose = False;
log = False
log_only = False
if len(arg) > 0:
boot_path = arg[0].rstrip('/') + '/'
#interpret arguments --------------------------------------------------------
for o, a in opts:
if o == '-b':
if build_path != STABLE:
build = a
build_path = 'build' + build
elif o == '-s':
build = ""
build_path = STABLE
elif o == '-l':
log = True
elif o == '-L':
log = True
log_only = True
elif o == '-v':
verbose = True
elif o == '-h' or 0 == '--help':
usage()
exit(0)
base_path = "http://olpc.download.redhat.com/olpc/streams/development/"; + build_path + "/devel_jffs2/"
#determine latest stable or development build number ------------------------
if build == "":
try:
url_file = urllib2.urlopen(base_path)
for line in url_file:
build,n = re.subn(r'.*os(\d+)\.img.*\n', r'\1', line)
if n > 0:
break
url_file.close()
except:
if build_path == LATEST:
sys.exit('Error: Could not locate latest development build')
else:
sys.exit('Error: Could not locate latest stable build')
crc_filename = "os" + build + ".crc"
img_filename = "os" + build + ".img"
#print the change log -------------------------------------------------------
if log:
try:
url_file = urllib2.urlopen(base_path + "ChangeLog")
print '\n--------------------------------------------------------------------------------'
for line in url_file:
print line.rstrip('\n')
print '--------------------------------------------------------------------------------\n'
url_file.close()
except urllib2.HTTPError, e:
print '\n--------------------------------------------------------------------------------'
print "No change log available for build " + build
print '--------------------------------------------------------------------------------\n'
if log_only:
sys.exit(0)
#remove images from boot directory ------------------------------------------
if verbose:
print "Removing images from " + boot_path
try:
for f in os.listdir(boot_path):
if re.match(r'^os\d+\.', f):
print "\tremoving " + f + "..."
os.remove(boot_path + f)
except:
sys.exit('Error: could not locate ' + boot_path)
if verbose:
if build_path == LATEST:
print "Downloading latest development build (" + build + ")"
elif build_path == STABLE:
print "Downloading latest stable build (" + build + ")"
else:
print "Downloading build " + build
#download the CRC file ------------------------------------------------------
if verbose:
print "\tdownloading " + crc_filename + "..."
try:
url_file = urllib2.urlopen(base_path + crc_filename)
crc_file = open(boot_path + crc_filename, 'wb')
for line in url_file:
crc_file.write(line)
url_file.close()
crc_file.close()
except urllib2.HTTPError, e:
sys.exit('Error: Could not download crc file (' + str(e.code) + ')')
except:
sys.exit('Error: Could not write ' + boot_path + crc_filename)
#download the IMG file ------------------------------------------------------
if verbose:
print "\tdownloading " + img_filename + "..."
try:
url_file = urllib2.urlopen(base_path + img_filename)
img_file = open(boot_path + img_filename, 'wb')
for line in url_file:
img_file.write(line)
url_file.close()
img_file.close()
except urllib2.HTTPError, e:
sys.exit('Error: Could not download img file (' + str(e.code) + ')')
except:
sys.exit('Error: Could not write ' + boot_path + img_filename)
if verbose:
print 'Autoinstallation build ' + build + ' completed.\n'
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