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#!/usr/bin/env nix-shell
#!nix-shell -i python3 -p python3
import os
import re
import json
import urllib.request
from distutils.version import LooseVersion
UPSTREAM_INFO_FILE = os.path.join(
os.path.dirname(os.path.abspath(__file__)),
"upstream-info.json"
)
def fetch_latest_version():
url = "http://download.virtualbox.org/virtualbox/LATEST.TXT"
return urllib.request.urlopen(url).read().strip().decode()
def load_upstream_info():
try:
with open(UPSTREAM_INFO_FILE, 'r') as fp:
return json.load(fp)
except FileNotFoundError:
return {'version': "0"}
def save_upstream_info(contents):
remark = "Generated using update.py from the same directory."
contents['__NOTE'] = remark
data = json.dumps(contents, indent=2, sort_keys=True)
with open(UPSTREAM_INFO_FILE, 'w') as fp:
fp.write(data + "\n")
def fetch_file_table(version):
url = "http://download.virtualbox.org/virtualbox/{}/SHA256SUMS"
url = url.format(version)
result = {}
for line in urllib.request.urlopen(url):
sha, name = line.rstrip().split()
result[name.lstrip(b'*').decode()] = sha.decode()
return result
def update_to_version(version):
extpack_start = 'Oracle_VM_VirtualBox_Extension_Pack-'
version_re = version.replace('.', '\\.')
attribute_map = {
'extpack': r'^' + extpack_start + r'[^-]+-[^.]+.vbox-extpack$',
'extpackRev': r'^' + extpack_start + r'[^-]+-([^.]+).vbox-extpack$',
'main': r'^VirtualBox-' + version_re + r'.tar.bz2$',
'guest': r'^VBoxGuestAdditions_' + version_re + r'.iso$',
}
table = fetch_file_table(version)
new_attrs = {'version': version}
for attr, searchexpr in attribute_map.items():
result = [re.search(searchexpr, key) for key in table.keys()]
filtered = filter(lambda m: m is not None, result)
found = [m.groups()[0] if len(m.groups()) > 0 else table[m.group(0)]
for m in filtered if m is not None]
if len(found) == 0:
msg = "No package found for attribute {}".format(attr)
raise AssertionError(msg)
elif len(found) != 1:
msg = "More than one package found for attribute {}: ".format(attr)
msg += ', '.join(found)
raise AssertionError(msg)
else:
new_attrs[attr] = found[0]
return new_attrs
info = load_upstream_info()
latest = fetch_latest_version()
if LooseVersion(info['version']) < LooseVersion(latest):
print("Updating to version {}...".format(latest), end="", flush=True)
new_attrs = update_to_version(latest)
save_upstream_info(new_attrs)
print(" done.")
else:
print("Version {} is already the latest one.".format(info['version']))
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