print-summary

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Print a textual representation of the summary file
#
# Copyright 2015 Colin Walters <walters@verbum.org>
# Licensed under the new-BSD license (http://www.opensource.org/licenses/bsd-license.php)

from __future__ import print_function

import gi
gi.require_version('OSTree', '1.0')
from gi.repository import GLib, Gio, OSTree
import argparse, os, sys, requests

def fatal(msg):
    print >>sys.stderr, msg
    sys.exit(1)

parser = argparse.ArgumentParser(prog="print-summary")
parser.add_argument("path", help="Summary path as file",
                    action='store')
args = parser.parse_args()

if args.path.startswith("http://") or args.path.startswith("https://"):
    r = requests.get(args.path)
    if r.status_code != requests.codes.ok:
        print(r.headers)
        print(r.text)
        fatal("Couldn't fetch summary file")
    bytedata = GLib.Bytes.new(r.content)
else:
    with open(args.path) as f:
        bytedata = GLib.Bytes.new(f.read())
typestr = GLib.VariantType.new('(a(s(taya{sv}))a{sv})')
d = GLib.Variant.new_from_bytes(typestr, bytedata, False)

refs, other = d

for refname, refdata in refs:
    size=refdata[0]
    csumarray=refdata[1]
    if len(csumarray) != 32:
        print("warning: invalid csum for ref {}", refname)
        continue
    csum = ''.join(['%x' % v for v in csumarray])
    print("{} → {} (size={})".format(refname, csum, size))

deltas = other.get('ostree.static-deltas', {})
for (deltaname, csum) in deltas.iteritems():
    print("delta: {}".format(deltaname))