2 A simple non-interactive policy.
4 This module provides a simple policy that will select, download and run a suitable set of
5 implementations. It is not interactive. This is the policy used when you run B{0launch -c}, and
6 is also the policy used to run the injector's GUI.
8 @deprecated: The interesting functionality has moved into the L{policy.Policy} base-class.
11 # Copyright (C) 2006, Thomas Leonard
12 # See the README file for details, or visit http://0install.net.
15 from logging
import debug
, info
, warn
17 from zeroinstall
.support
import tasks
18 from zeroinstall
.injector
import model
, policy
, run
19 from zeroinstall
.injector
.handler
import Handler
20 from zeroinstall
import NeedDownload
22 class AutoPolicy(policy
.Policy
):
23 __slots__
= ['download_only']
25 def __init__(self
, interface_uri
, download_only
= False, dry_run
= False, src
= False, handler
= None):
26 """@param handler: (new in 0.30) handler to use, or None to create a L{Handler}"""
27 handler
= handler
or Handler()
29 info("Note: dry_run is deprecated. Pass it to the handler instead!")
30 handler
.dry_run
= True
31 policy
.Policy
.__init
__(self
, interface_uri
, handler
, src
= src
)
32 self
.download_only
= download_only
34 def execute(self
, prog_args
, main
= None, wrapper
= None):
35 downloaded
= self
.download_uncached_implementations()
37 self
.handler
.wait_for_blocker(downloaded
)
38 if not self
.download_only
:
39 run
.execute(self
, prog_args
, dry_run
= self
.handler
.dry_run
, main
= main
, wrapper
= wrapper
)
41 info("Downloads done (download-only mode)")
43 def download_and_execute(self
, prog_args
, refresh
= False, main
= None):
44 refreshed
= self
.solve_with_downloads(refresh
)
46 errors
= self
.handler
.wait_for_blocker(refreshed
)
48 raise model
.SafeException("Errors during download: " + '\n'.join(errors
))
50 if not self
.solver
.ready
:
51 raise model
.SafeException("Can't find all required implementations:\n" +
52 '\n'.join(["- %s -> %s" % (iface
, self
.solver
.selections
[iface
])
53 for iface
in self
.solver
.selections
]))
54 self
.execute(prog_args
, main
= main
)