Source Code for Module zeroinstall.cmd.man

 1  """ 
 2  The B{0install man} command-line interface. 
 3  """ 
 4   
 5  # Copyright (C) 2012, Thomas Leonard 
 6  # See the README file for details, or visit http://0install.net. 
 7   
 8  from __future__ import print_function 
 9   
10  import sys, os 
11   
12  from zeroinstall import support, logger 
13   
14  syntax = "NAME" 
15   
16 -def add_options(parser): 
17          pass 
18   
19 -def handle(config, options, args): 
20          if len(args) != 1 or not _0install_man(config, args[0]): 
21                  logger.debug("Not a 0install alias or app-script, so passing through to system man command: %r", args) 
22                  os.execlp('man', 'man', *args) 
23   
24 -def _0install_man(config, command): 
25          """@type command: str""" 
26          from zeroinstall import apps, alias, helpers 
27   
28          path = support.find_in_path(command) 
29          if not path: 
30                  return None 
31   
32          try: 
33                  with open(path, 'rt') as stream: 
34                          app_info = apps.parse_script_header(stream) 
35                          if app_info: 
36                                  app = config.app_mgr.lookup_app(app_info.name) 
37                                  sels = app.get_selections() 
38                                  main = None 
39                          else: 
40                                  alias_info = alias.parse_script_header(stream) 
41                                  if alias_info is None: 
42                                          return None 
43                                  sels = helpers.ensure_cached(alias_info.uri, alias_info.command, config = config) 
44                                  if not sels: 
45                                          # Cancelled by user 
46                                          sys.exit(1) 
47                                  main = alias_info.main 
48          except IOError as e: 
49                  logger.info("Error reading %s, falling back to `man %s`", path, command) 
50                  os.execlp('man', 'man', command) 
51                  sys.exit(1) 
52   
53          helpers.exec_man(config.stores, sels, main, fallback_name = command) 
54          assert 0 
55   
56 -def complete(completion, args, cword): 
57          """@type completion: L{zeroinstall.cmd._Completion} 
58          @type args: [str] 
59          @type cword: int""" 
60          if len(args) != 1: return 
61          completion.expand_apps() 
62