zeroinstall/injector/writer.py

   1 """
   2 Save per-interface configuration information.
   3 """
   4
   5 # Copyright (C) 2006, 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 import basedir
  12
  13 from model import *
  14
  15 from namespaces import config_site, config_prog, XMLNS_IFACE
  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_interface(interface):
  26         user_overrides = basedir.save_config_path(config_site, config_prog, 'user_overrides')
  27
  28         impl = minidom.getDOMImplementation()
  29         doc = impl.createDocument(XMLNS_IFACE, 'interface-preferences', None)
  30
  31         root = doc.documentElement
  32         root.setAttributeNS(XMLNS_NAMESPACE, 'xmlns', XMLNS_IFACE)
  33         root.setAttribute('uri', interface.uri)
  34
  35         if interface.stability_policy:
  36                 root.setAttribute('stability-policy', str(interface.stability_policy))
  37
  38         if interface.last_checked:
  39                 root.setAttribute('last-checked', str(interface.last_checked))
  40
  41         impls = interface.implementations.values()
  42         impls.sort()
  43         for impl in impls:
  44                 _add_impl(root, impl)
  45
  46         for feed in interface.extra_feeds:
  47                 if feed.user_override:
  48                         elem = doc.createElementNS(XMLNS_IFACE, 'feed')
  49                         root.appendChild(elem)
  50                         elem.setAttribute('src', feed.uri)
  51                         if feed.arch:
  52                                 elem.setAttribute('arch', feed.arch)
  53
  54         import tempfile
  55         tmp_fd, tmp_name = tempfile.mkstemp(dir = user_overrides)
  56         try:
  57                 doc.writexml(os.fdopen(tmp_fd, 'w'), addindent = " ", newl = '\n')
  58                 path = os.path.join(user_overrides, escape(interface.uri))
  59                 os.rename(tmp_name, path)
  60         except:
  61                 os.unlink(tmp_name)
  62                 raise