zeroinstall/0launch-gui/compile.py

   1 import os, popen2
   2 import gtk, gobject
   3 import dialog
   4 from logging import info
   5
   6 from zeroinstall.injector import reader, iface_cache, model
   7 from zeroinstall.injector.policy import Policy
   8
   9 XMLNS_0COMPILE = 'http://zero-install.sourceforge.net/2006/namespaces/0compile'
  10
  11 class Command:
  12         def __init__(self):
  13                 self.child = None
  14                 self.error = ""
  15
  16         def run(self, command, success):
  17                 assert self.child is None
  18                 self.success = success
  19                 self.child = popen2.Popen4(command)
  20                 self.child.tochild.close()
  21                 gobject.io_add_watch(self.child.fromchild, gobject.IO_IN | gobject.IO_HUP, self.got_data)
  22
  23         def got_data(self, src, cond):
  24                 data = os.read(src.fileno(), 100)
  25                 if data:
  26                         self.error += data
  27                         return True
  28                 else:
  29                         status = self.child.wait()
  30                         self.child = None
  31
  32                         if os.WIFEXITED(status) and os.WEXITSTATUS(status) == 0:
  33                                 self.success()
  34                         else:
  35                                 if os.WIFEXITED(status):
  36                                         status = os.WEXITSTATUS(status)
  37                                         if status == 1 and not self.error:
  38                                                 return False # Cancelled
  39                                         dialog.alert(None, "Command failed with exit code %d:\n%s\n" %
  40                                                 (status, self.error))
  41                                 else:
  42                                         dialog.alert(None, "Command failed:\n%s\n" % self.error)
  43                         return False
  44
  45 def compile(policy, interface):
  46         def add_feed():
  47                 # A new local feed may have been registered, so update the interface from the cache
  48                 info("0compile command completed successfully. Reloading interface details.")
  49                 reader.update_from_cache(interface)
  50                 policy.recalculate()
  51
  52         def build():
  53                 # Get the chosen versions
  54                 src_policy = Policy(interface.uri, src = True)
  55                 src_policy.freshness = 0
  56
  57                 src_policy.recalculate()
  58                 if not src_policy.ready:
  59                         raise Exception('Internal error: required source components not found!')
  60
  61                 root_iface = iface_cache.iface_cache.get_interface(src_policy.root)
  62                 impl = src_policy.implementation[root_iface]
  63                 min_version = impl.metadata.get(XMLNS_0COMPILE + ' min-version', None)
  64                 if not min_version: min_version = '0.4'
  65                 # Check the syntax is valid and the version is high enough
  66                 if model.parse_version(min_version) < model.parse_version('0.4'):
  67                         min_version = '0.4'
  68
  69                 # Do the whole build-and-register-feed
  70                 c = Command()
  71                 c.run(("0launch",
  72                         '--not-before=' + min_version,
  73                         "http://0install.net/2006/interfaces/0compile.xml",
  74                         'gui',
  75                         '--no-prompt',
  76                         interface.uri), add_feed)
  77
  78         # Prompt user to choose source version
  79         c = Command()
  80         c.run(['0launch', '--gui', '--source', '--download-only', interface.uri], build)