support.py

   1 # Copyright (C) 2008, Thomas Leonard
   2 # See the COPYING file for details, or visit http://0install.net.
   3
   4 import sys, time
   5 from optparse import OptionParser
   6 import tempfile, shutil, os
   7 from xml.dom import minidom
   8 import subprocess
   9
  10 from zeroinstall.injector import model, qdom, distro
  11 from zeroinstall.injector.namespaces import XMLNS_IFACE
  12 from zeroinstall.support import basedir
  13
  14 config_site = '0install.net'
  15 config_prog = 'deb2zero'
  16
  17 def read_child(cmd):
  18         child = subprocess.Popen(cmd, stdout = subprocess.PIPE)
  19         output, unused = child.communicate()
  20         if child.returncode:
  21                 print >>sys.stderr, output
  22                 print >>sys.stderr, "%s: code = %d" % (' '.join(cmd), child.returncode)
  23                 sys.exit(1)
  24         return output
  25
  26 def add_node(parent, element, text = None, before = '  ', after = '\n'):
  27         doc = parent.ownerDocument
  28         parent.appendChild(doc.createTextNode(before))
  29         new = doc.createElementNS(XMLNS_IFACE, element)
  30         parent.appendChild(new)
  31         if text:
  32                 new.appendChild(doc.createTextNode(text))
  33         parent.appendChild(doc.createTextNode(after))
  34         return new
  35
  36 class DebMappings:
  37         def __init__(self):
  38                 self.last_base = 'http://0install.net/2008/3rd-party'   # For suggesting new URIs
  39                 self.deb_mappings = {}
  40                 mappings_file = basedir.load_first_config(config_site, config_prog, 'deb-mappings')
  41                 if mappings_file:
  42                         self.load(mappings_file)
  43                 else:
  44                         print >>sys.stderr, "Mappings file not found; dependencies will not be included."
  45
  46         def load(self, mappings_file):
  47                 for line in file(mappings_file):
  48                         if ':' in line:
  49                                 deb, zero = [x.strip() for x in line.split(':', 1)]
  50                                 if deb in self.deb_mappings:
  51                                         print "Mapping for %s given twice in %s!" % (deb, mappings_file)
  52                                 self.deb_mappings[deb] = zero
  53                                 self.last_base = zero.rsplit('/', 1)[0]
  54
  55         def process(self, s):
  56                 parts = [x.strip() for x in s.split('(', 1)]
  57                 if len(parts) == 2:
  58                         pkg, restrictions = parts
  59                 else:
  60                         pkg = parts[0]
  61                         restrictions = None
  62
  63                 if pkg not in self.deb_mappings:
  64                         print "Ignoring dependency on %s; not in mappings file" % pkg
  65                         return None
  66
  67                 r = model.InterfaceDependency(self.deb_mappings[pkg])
  68                 # TODO: version restrictions
  69                 return r
  70
  71         def lookup(self, pkg):
  72                 return self.deb_mappings.get(pkg, None)
  73
  74         def add_mapping(self, pkg, uri):
  75                 self.deb_mappings[pkg] = uri
  76                 config_dir = basedir.save_config_path(config_site, config_prog)
  77                 mappings_file = os.path.join(config_dir, 'deb-mappings')
  78                 stream = file(mappings_file, 'a')
  79                 stream.write("%s: %s\n" % (pkg, uri))
  80                 stream.close()
  81                 print "Wrote name mapping to %s" % mappings_file
  82
  83         def get_suggestion(self, pkg_name):
  84                 return "%s/%s.xml" % (self.last_base, pkg_name)