deb2zero

   1 #!/usr/bin/env python
   2 # Copyright (C) 2008, Thomas Leonard
   3 # See the COPYING file for details, or visit http://0install.net.
   4
   5 import sys, time
   6 from optparse import OptionParser
   7 import tempfile, shutil, os
   8 from xml.dom import minidom
   9 import subprocess
  10
  11 manifest_algorithm = 'sha1new'
  12
  13 from zeroinstall.injector.namespaces import XMLNS_IFACE
  14
  15 deb_category_to_freedesktop = {
  16         'devel' : 'Development',
  17         'web' : 'Network',
  18         'graphics' : 'Graphics',
  19 }
  20
  21 valid_categories = [
  22         'AudioVideo',
  23         'Audio',
  24         'Video',
  25         'Development',
  26         'Education',
  27         'Game',
  28         'Graphics',
  29         'Network',
  30         'Office',
  31         'Settings',
  32         'System',
  33         'Utility',
  34 ]
  35
  36 parser = OptionParser('usage: %prog [options] http://.../package.deb\n'
  37                       'Create a Zero Install feed for a Debian package.')
  38 (options, args) = parser.parse_args()
  39
  40 if len(args) != 1:
  41         parser.print_help()
  42         sys.exit(1)
  43
  44 pkg_url = args[0]
  45 assert pkg_url.startswith('http:') or \
  46        pkg_url.startswith('https:') or \
  47        pkg_url.startswith('ftp:')
  48 deb_file = os.path.abspath(pkg_url.rsplit('/', 1)[1])
  49
  50 if not os.path.exists(deb_file):
  51         print >>sys.stderr, "File '%s' not found, so downloading from %s..." % (deb_file, pkg_url)
  52         subprocess.check_call(['wget', pkg_url])
  53
  54 def read_child(cmd):
  55         child = subprocess.Popen(cmd, stdout = subprocess.PIPE)
  56         output, unused = child.communicate()
  57         if child.returncode:
  58                 print >>sys.stderr, output
  59                 print >>sys.stderr, "%s: code = %d" % (' '.join(cmd), child.returncode)
  60                 sys.exit(1)
  61         return output
  62
  63 details = read_child(['dpkg-deb', '--info', deb_file])
  64
  65 description_and_summary = details.split('\n Description: ')[1].split('\n')
  66 summary = description_and_summary[0]
  67 description = ''
  68 for x in description_and_summary[1:]:
  69         if not x: continue
  70         assert x[0] == ' '
  71         x = x[1:]
  72         if x[0] != ' ':
  73                 break
  74         if x == ' .':
  75                 description += '\n'
  76         else:
  77                 description += x[1:].replace('.  ', '. ') + '\n'
  78 description = description.strip()
  79
  80 pkg_name = '(unknown)'
  81 pkg_version = None
  82 pkg_arch = None
  83 category = None
  84 for line in details.split('\n'):
  85         if not line: continue
  86         assert line.startswith(' ')
  87         line = line[1:]
  88         if ':' in line:
  89                 key, value = line.split(':', 1)
  90                 value = value.strip()
  91                 if key == 'Section':
  92                         category = deb_category_to_freedesktop.get(value)
  93                         if not category:
  94                                 print >>sys.stderr, "Warning: no mapping for Debian category '%s'" % value
  95                 elif key == 'Package':
  96                         pkg_name = value
  97                 elif key == 'Version':
  98                         pkg_version = value
  99                 elif key == 'Architecture':
 100                         if value == 'amd64':
 101                                 value = 'x86_64'
 102                         pkg_arch = 'Linux-' + value
 103
 104 template = '''<interface xmlns="http://zero-install.sourceforge.net/2004/injector/interface">
 105 </interface>'''
 106 doc = minidom.parseString(template)
 107 root = doc.documentElement
 108
 109 pkg_main = None
 110 tmp = tempfile.mkdtemp(prefix = 'deb2zero-')
 111 try:
 112         files = read_child(['dpkg-deb', '-X', deb_file, tmp])
 113
 114         for f in files.split('\n'):
 115                 if f.endswith('.desktop'):
 116                         full = os.path.join(tmp, f)
 117                         for line in file(full):
 118                                 if line.startswith('Categories'):
 119                                         for cat in line.split('=', 1)[1].split(';'):
 120                                                 cat = cat.strip()
 121                                                 if cat in valid_categories:
 122                                                         category = cat
 123                                                         break
 124                 elif f.startswith('./usr/bin'):
 125                         pkg_main = f[2:]
 126
 127         manifest = read_child(['0store', 'manifest', tmp, manifest_algorithm])
 128         digest = manifest.rsplit('\n', 2)[1]
 129         subprocess.check_call(['0store', 'add', digest, tmp])
 130 finally:
 131         shutil.rmtree(tmp)
 132
 133 def add_node(parent, element, text = None, before = '  ', after = '\n'):
 134         doc = parent.ownerDocument
 135         parent.appendChild(doc.createTextNode(before))
 136         new = doc.createElementNS(XMLNS_IFACE, element)
 137         parent.appendChild(new)
 138         if text:
 139                 new.appendChild(doc.createTextNode(text))
 140         parent.appendChild(doc.createTextNode(after))
 141         return new
 142
 143 add_node(root, 'name', pkg_name)
 144 add_node(root, 'summary', summary)
 145 add_node(root, 'description', description)
 146 if category:
 147         add_node(root, 'category', category)
 148 group = add_node(root, 'group', '')
 149 if pkg_arch:
 150         group.setAttribute('arch', pkg_arch)
 151 else:
 152         print >>sys.stderr, "No Architecture: field in .deb."
 153 impl = add_node(group, 'implementation', before = '\n    ', after = '\n  ')
 154 impl.setAttribute('id', digest)
 155 impl.setAttribute('version', pkg_version)
 156 impl.setAttribute('released', time.strftime('%Y-%m-%d'))
 157 if pkg_main:
 158         impl.setAttribute('main', pkg_main)
 159
 160 archive = add_node(impl, 'archive', before = '\n      ', after = '\n    ')
 161 archive.setAttribute('href', pkg_url)
 162 archive.setAttribute('size', str(os.path.getsize(deb_file)))
 163
 164 print "<?xml version='1.0'?>"
 165 root.writexml(sys.stdout)
 166 print