Source Code for Module turbogears.command.info

 1  """Commands for listing TurboGears default and extension packages info""" 
 2   
 3  try: 
 4      from email.parser import Parser 
 5  except ImportError: # Python < 2.5 
 6      from email.Parser import Parser 
 7   
 8  import pkg_resources 
 9   
10  entrypoints = { 
11      'tg-admin Commands' : 'turbogears.command', 
12      'Template Engines' : 'python.templating.engines', 
13      'Widget Packages' : 'turbogears.widgets', 
14      'TurboGears Extensions' : 'turbogears.extensions', 
15      'Identity Providers' : 'turbogears.identity.provider', 
16      'Visit Managers' : 'turbogears.visit.manager', 
17      'Toolbox Gadgets' : 'turbogears.toolboxcommand'} 
18   
19  parsestr = Parser().parsestr 
20   
21 -def retrieve_pkg_info(distribution): 
22      """Retrieve parsed package info from distribution.""" 
23      return parsestr(distribution.get_metadata('PKG-INFO')) 
24   
25   
26 -def retrieve_url(distribution): 
27      """Retrieve URL from distribution.""" 
28      try: 
29          info = retrieve_pkg_info(distribution) 
30      except Exception: 
31          url = None 
32      else: 
33          url = info['Home-page'] or info['Url']  or info['Download-Url'] 
34      return url 
35   
36   
37 -def add_link(distribution): 
38      """Add link to distribution.""" 
39      info = str(distribution) 
40      url = retrieve_url(distribution) 
41      if url: 
42          info = str(info).split(None, 1) 
43          info[0] = '<a href="%s">%s</a>' % (url, info[0]) 
44          info = ' '.join(info) 
45      return info 
46   
47   
48 -def retrieve_info(with_links=False): 
49      """Retrieve default and extension packages info.""" 
50      format = with_links and add_link or str 
51      # get default packages 
52      packages = [format(pkg) for pkg in pkg_resources.require('Turbogears')] 
53      # get extension packages 
54      plugins = {} 
55      for name, pointname in entrypoints.items(): 
56          plugins[name] = ['%s (%s)' % (entrypoint.name, format(entrypoint.dist)) 
57              for entrypoint in pkg_resources.iter_entry_points(pointname)] 
58      return packages, plugins 
59   
60   
61 -class InfoCommand: 
62      """Shows version info for debugging.""" 
63   
64      desc = "Show version info" 
65   
66 -    def __init__(self,*args, **kwargs): 
67          pass 
68   
69 -    def run(self): 
70          print """TurboGears Complete Version Information 
71   
72  TurboGears requires: 
73  """ 
74          packages, plugins = retrieve_info() 
75          seen_packages = set() 
76          for p in packages: 
77              if p not in seen_packages: 
78                  print '*', p 
79                  seen_packages.add(p) 
80          for name, pluginlist in plugins.items(): 
81              print '\n', name, '\n' 
82              for plugin in pluginlist: 
83                  print '*', plugin 
84