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 }
  19
  20 valid_categories = [
  21         'AudioVideo',
  22         'Audio',
  23         'Video',
  24         'Development',
  25         'Education',
  26         'Game',
  27         'Graphics',
  28         'Network',
  29         'Office',
  30         'Settings',
  31         'System',
  32         'Utility',
  33 ]
  34
  35 parser = OptionParser('usage: %prog [options] http://.../package.deb\n'
  36                       'Create a Zero Install feed for a Debian package.')
  37 (options, args) = parser.parse_args()
  38
  39 if len(args) != 1:
  40         parser.print_help()
  41         sys.exit(1)
  42
  43 pkg_url = args[0]
  44 assert pkg_url.startswith('http:') or \
  45        pkg_url.startswith('https:') or \
  46        pkg_url.startswith('ftp:')
  47 deb_file = os.path.abspath(pkg_url.rsplit('/', 1)[1])
  48
  49 if not os.path.exists(deb_file):
  50         print "File '%s' not found, so downloading from %s..." % (deb_file, pkg_url)
  51         subprocess.check_call(['wget', pkg_url])
  52
  53 def read_child(cmd):
  54         child = subprocess.Popen(cmd, stdout = subprocess.PIPE)
  55         output, unused = child.communicate()
  56         if child.returncode:
  57                 print >>sys.stderr, output
  58                 print >>sys.stderr, "%s: code = %d" % (' '.join(cmd), child.returncode)
  59                 sys.exit(1)
  60         return output
  61
  62 details = read_child(['dpkg-deb', '--info', deb_file])
  63
  64 description_and_summary = details.split('\n Description: ')[1].split('\n')
  65 summary = description_and_summary[0]
  66 description = ''
  67 for x in description_and_summary[1:]:
  68         if not x: continue
  69         assert x[0] == ' '
  70         x = x[1:]
  71         if x[0] != ' ':
  72                 break
  73         if x == ' .':
  74                 description += '\n'
  75         else:
  76                 description += x[1:].replace('.  ', '. ') + '\n'
  77 description = description.strip()
  78
  79 pkg_name = '(unknown)'
  80 pkg_version = None
  81 category = None
  82 for line in details.split('\n'):
  83         if not line: continue
  84         assert line.startswith(' ')
  85         line = line[1:]
  86         if ':' in line:
  87                 key, value = line.split(':', 1)
  88                 value = value.strip()
  89                 if key == 'Section':
  90                         category = deb_category_to_freedesktop.get(value)
  91                         if category:
  92                                 break
  93                         else:
  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
 100 template = '''<interface xmlns="http://zero-install.sourceforge.net/2004/injector/interface">
 101 </interface>'''
 102 doc = minidom.parseString(template)
 103 root = doc.documentElement
 104
 105 pkg_main = None
 106 tmp = tempfile.mkdtemp(prefix = 'deb2zero-')
 107 try:
 108         files = read_child(['dpkg-deb', '-X', deb_file, tmp])
 109
 110         for f in files.split('\n'):
 111                 if f.endswith('.desktop'):
 112                         full = os.path.join(tmp, f)
 113                         for line in file(full):
 114                                 if line.startswith('Categories'):
 115                                         for cat in line.split('=', 1)[1].split(';'):
 116                                                 cat = cat.strip()
 117                                                 if cat in valid_categories:
 118                                                         category = cat
 119                                                         break
 120                 elif f.startswith('./usr/bin'):
 121                         pkg_main = f[2:]
 122
 123         manifest = read_child(['0store', 'manifest', tmp, manifest_algorithm])
 124         digest = manifest.rsplit('\n', 2)[1]
 125 finally:
 126         shutil.rmtree(tmp)
 127
 128 def add_node(parent, element, text = None, before = '  ', after = '\n'):
 129         doc = parent.ownerDocument
 130         parent.appendChild(doc.createTextNode(before))
 131         new = doc.createElementNS(XMLNS_IFACE, element)
 132         parent.appendChild(new)
 133         if text:
 134                 new.appendChild(doc.createTextNode(text))
 135         parent.appendChild(doc.createTextNode(after))
 136         return new
 137
 138 add_node(root, 'name', pkg_name)
 139 add_node(root, 'summary', summary)
 140 add_node(root, 'description', description)
 141 if category:
 142         add_node(root, 'category', category)
 143 group = add_node(root, 'group', '')
 144 impl = add_node(group, 'implementation', before = '\n    ', after = '\n  ')
 145 impl.setAttribute('id', digest)
 146 impl.setAttribute('version', pkg_version)
 147 impl.setAttribute('released', time.strftime('%Y-%m-%d'))
 148 if pkg_main:
 149         impl.setAttribute('main', pkg_main)
 150
 151 archive = add_node(impl, 'archive', before = '\n      ', after = '\n    ')
 152 archive.setAttribute('href', pkg_url)
 153 archive.setAttribute('size', str(os.path.getsize(deb_file)))
 154
 155 print "<?xml version='1.0'?>"
 156 root.writexml(sys.stdout)
 157 print