Source Code for Module zeroinstall.injector.writer

 1  """ 
 2  Save per-interface and per-feed 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 import support 
12  from zeroinstall.support import basedir 
13   
14  from zeroinstall.injector import model 
15  from zeroinstall.injector.namespaces import config_site, config_prog, XMLNS_IFACE 
16   
17 -def _atomic_save(doc, parent, uri): 
18          """@type parent: str 
19          @type uri: str""" 
20          import tempfile 
21          tmp_fd, tmp_name = tempfile.mkstemp(dir = parent) 
22          try: 
23                  tmp_file = os.fdopen(tmp_fd, 'w') 
24                  doc.writexml(tmp_file, addindent = " ", newl = '\n') 
25                  tmp_file.close() 
26                  path = os.path.join(parent, model._pretty_escape(uri)) 
27                  support.portable_rename(tmp_name, path) 
28          except: 
29                  os.unlink(tmp_name) 
30                  raise 
31   
32 -def save_feed(feed): 
33          """Save information about a feed. Currently, this is the last_checked time and any user-set stability ratings. 
34          @type feed: L{zeroinstall.injector.model.ZeroInstallFeed} 
35          @since: 0.49""" 
36          feeds = basedir.save_config_path(config_site, config_prog, 'feeds') 
37   
38          impl = minidom.getDOMImplementation() 
39          doc = impl.createDocument(XMLNS_IFACE, 'feed-preferences', None) 
40          root = doc.documentElement 
41          root.setAttributeNS(XMLNS_NAMESPACE, 'xmlns', XMLNS_IFACE) 
42   
43          if feed.last_checked: 
44                  root.setAttribute('last-checked', str(feed.last_checked)) 
45   
46          impls = list(feed.implementations.values()) 
47          impls.sort() 
48          for impl in impls: 
49                  if impl.user_stability: 
50                          node = doc.createElementNS(XMLNS_IFACE, 'implementation') 
51                          root.appendChild(node) 
52                          node.setAttribute('user-stability', str(impl.user_stability)) 
53                          node.setAttribute('id', impl.id) 
54   
55          _atomic_save(doc, feeds, feed.url) 
56   
57 -def save_interface(interface): 
58          """@type interface: L{zeroinstall.injector.model.Interface}""" 
59          user_overrides = basedir.save_config_path(config_site, config_prog, 'interfaces') 
60   
61          impl = minidom.getDOMImplementation() 
62          doc = impl.createDocument(XMLNS_IFACE, 'interface-preferences', None) 
63   
64          root = doc.documentElement 
65          root.setAttributeNS(XMLNS_NAMESPACE, 'xmlns', XMLNS_IFACE) 
66          root.setAttribute('uri', interface.uri) 
67   
68          if interface.stability_policy: 
69                  root.setAttribute('stability-policy', str(interface.stability_policy)) 
70   
71          for feed in interface.extra_feeds: 
72                  if feed.user_override: 
73                          elem = doc.createElementNS(XMLNS_IFACE, 'feed') 
74                          root.appendChild(elem) 
75                          elem.setAttribute('src', feed.uri) 
76                          if feed.arch: 
77                                  elem.setAttribute('arch', feed.arch) 
78                          if feed.site_package: 
79                                  elem.setAttribute('is-site-package', 'True') 
80   
81          _atomic_save(doc, user_overrides, interface.uri) 
82