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 import os
   9 from xml.dom import minidom, XMLNS_NAMESPACE
  10
  11 from zeroinstall.support import basedir
  12
  13 from zeroinstall.injector.model import escape
  14 from zeroinstall.injector.namespaces import config_site, config_prog, XMLNS_IFACE
  15 from zeroinstall.injector.iface_cache import iface_cache
  16
  17 def _add_impl(parent, impl):
  18         if impl.user_stability:
  19                 doc = parent.ownerDocument
  20                 node = doc.createElementNS(XMLNS_IFACE, 'implementation')
  21                 parent.appendChild(node)
  22                 node.setAttribute('user-stability', str(impl.user_stability))
  23                 node.setAttribute('id', impl.id)
  24
  25 def save_feed(feed):
  26         # This is wrong. Feed and interface settings should be saved in separate files.
  27         save_interface(iface_cache.get_interface(feed.url))
  28
  29 def save_interface(interface):
  30         user_overrides = basedir.save_config_path(config_site, config_prog, 'user_overrides')
  31
  32         impl = minidom.getDOMImplementation()
  33         doc = impl.createDocument(XMLNS_IFACE, 'interface-preferences', None)
  34
  35         root = doc.documentElement
  36         root.setAttributeNS(XMLNS_NAMESPACE, 'xmlns', XMLNS_IFACE)
  37         root.setAttribute('uri', interface.uri)
  38
  39         if interface.stability_policy:
  40                 root.setAttribute('stability-policy', str(interface.stability_policy))
  41
  42         if interface.last_checked:
  43                 root.setAttribute('last-checked', str(interface.last_checked))
  44
  45         impls = interface.implementations.values()
  46         impls.sort()
  47         for impl in impls:
  48                 _add_impl(root, impl)
  49
  50         for feed in interface.extra_feeds:
  51                 if feed.user_override:
  52                         elem = doc.createElementNS(XMLNS_IFACE, 'feed')
  53                         root.appendChild(elem)
  54                         elem.setAttribute('src', feed.uri)
  55                         if feed.arch:
  56                                 elem.setAttribute('arch', feed.arch)
  57
  58         import tempfile
  59         tmp_fd, tmp_name = tempfile.mkstemp(dir = user_overrides)
  60         try:
  61                 tmp_file = os.fdopen(tmp_fd, 'w')
  62                 doc.writexml(tmp_file, addindent = " ", newl = '\n')
  63                 tmp_file.close()
  64                 path = os.path.join(user_overrides, escape(interface.uri))
  65                 os.rename(tmp_name, path)
  66         except:
  67                 os.unlink(tmp_name)
  68                 raise