zeroinstall/injector/writer.py

   1 """
   2 Save per-interface configuration information.
   3 """
   4
   5 # Copyright (C) 2009, Thomas Leonard
   6 # See the README file for details, or visit http://0install.net.
   7
   8 from zeroinstall import _
   9 import os
  10 from xml.dom import minidom, XMLNS_NAMESPACE
  11
  12 from zeroinstall.support import basedir
  13
  14 from zeroinstall.injector.model import escape
  15 from zeroinstall.injector.namespaces import config_site, config_prog, XMLNS_IFACE
  16 from zeroinstall.injector.iface_cache import iface_cache
  17
  18 def _add_impl(parent, impl):
  19         if impl.user_stability:
  20                 doc = parent.ownerDocument
  21                 node = doc.createElementNS(XMLNS_IFACE, 'implementation')
  22                 parent.appendChild(node)
  23                 node.setAttribute('user-stability', str(impl.user_stability))
  24                 node.setAttribute('id', impl.id)
  25
  26 def save_feed(feed):
  27         # This is wrong. Feed and interface settings should be saved in separate files.
  28         save_interface(iface_cache.get_interface(feed.url))
  29
  30 def save_interface(interface):
  31         user_overrides = basedir.save_config_path(config_site, config_prog, 'user_overrides')
  32
  33         feed = iface_cache.get_feed(interface.uri)
  34
  35         impl = minidom.getDOMImplementation()
  36         doc = impl.createDocument(XMLNS_IFACE, 'interface-preferences', None)
  37
  38         root = doc.documentElement
  39         root.setAttributeNS(XMLNS_NAMESPACE, 'xmlns', XMLNS_IFACE)
  40         root.setAttribute('uri', interface.uri)
  41
  42         if interface.stability_policy:
  43                 root.setAttribute('stability-policy', str(interface.stability_policy))
  44
  45         if feed is not None:
  46                 if feed.last_checked:
  47                         root.setAttribute('last-checked', str(feed.last_checked))
  48
  49                 impls = feed.implementations.values()
  50                 impls.sort()
  51                 for impl in impls:
  52                         _add_impl(root, impl)
  53
  54                 for feed in interface.extra_feeds:
  55                         if feed.user_override:
  56                                 elem = doc.createElementNS(XMLNS_IFACE, 'feed')
  57                                 root.appendChild(elem)
  58                                 elem.setAttribute('src', feed.uri)
  59                                 if feed.arch:
  60                                         elem.setAttribute('arch', feed.arch)
  61
  62         import tempfile
  63         tmp_fd, tmp_name = tempfile.mkstemp(dir = user_overrides)
  64         try:
  65                 tmp_file = os.fdopen(tmp_fd, 'w')
  66                 doc.writexml(tmp_file, addindent = " ", newl = '\n')
  67                 tmp_file.close()
  68                 path = os.path.join(user_overrides, escape(interface.uri))
  69                 os.rename(tmp_name, path)
  70         except:
  71                 os.unlink(tmp_name)
  72                 raise