zeroinstall/0launch-gui/compile.py

   1 # Copyright (C) 2008, Thomas Leonard
   2 # See the README file for details, or visit http://0install.net.
   3
   4 import os, popen2
   5 import gobject
   6 import dialog
   7 from logging import info
   8
   9 from zeroinstall.injector import reader, iface_cache, model
  10 from zeroinstall.injector.policy import Policy
  11
  12 XMLNS_0COMPILE = 'http://zero-install.sourceforge.net/2006/namespaces/0compile'
  13
  14 class Command:
  15         def __init__(self):
  16                 self.child = None
  17                 self.error = ""
  18
  19         def run(self, command, success):
  20                 assert self.child is None
  21                 self.success = success
  22                 self.child = popen2.Popen4(command)
  23                 self.child.tochild.close()
  24                 gobject.io_add_watch(self.child.fromchild, gobject.IO_IN | gobject.IO_HUP, self.got_data)
  25
  26         def got_data(self, src, cond):
  27                 data = os.read(src.fileno(), 100)
  28                 if data:
  29                         self.error += data
  30                         return True
  31                 else:
  32                         status = self.child.wait()
  33                         self.child = None
  34
  35                         if os.WIFEXITED(status) and os.WEXITSTATUS(status) == 0:
  36                                 self.success()
  37                         else:
  38                                 if os.WIFEXITED(status):
  39                                         status = os.WEXITSTATUS(status)
  40                                         if status == 1 and not self.error:
  41                                                 return False # Cancelled
  42                                         dialog.alert(None, "Command failed with exit code %d:\n%s\n" %
  43                                                 (status, self.error))
  44                                 else:
  45                                         dialog.alert(None, "Command failed:\n%s\n" % self.error)
  46                         return False
  47
  48 def compile(policy, interface):
  49         def add_feed():
  50                 # A new local feed may have been registered, so update the interface from the cache
  51                 info("0compile command completed successfully. Reloading interface details.")
  52                 reader.update_from_cache(interface)
  53                 policy.recalculate()
  54
  55         def build():
  56                 # Get the chosen versions
  57                 src_policy = Policy(interface.uri, src = True)
  58                 src_policy.freshness = 0
  59
  60                 src_policy.recalculate()
  61                 if not src_policy.ready:
  62                         raise Exception('Internal error: required source components not found!')
  63
  64                 root_iface = iface_cache.iface_cache.get_interface(src_policy.root)
  65                 impl = src_policy.implementation[root_iface]
  66                 min_version = impl.metadata.get(XMLNS_0COMPILE + ' min-version', None)
  67                 if not min_version: min_version = '0.4'
  68                 # Check the syntax is valid and the version is high enough
  69                 if model.parse_version(min_version) < model.parse_version('0.4'):
  70                         min_version = '0.4'
  71
  72                 # Do the whole build-and-register-feed
  73                 c = Command()
  74                 c.run(("0launch",
  75                         '--not-before=' + min_version,
  76                         "http://0install.net/2006/interfaces/0compile.xml",
  77                         'gui',
  78                         '--no-prompt',
  79                         interface.uri), add_feed)
  80
  81         # Prompt user to choose source version
  82         c = Command()
  83         c.run(['0launch', '--gui', '--source', '--download-only', interface.uri], build)