1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import argparse
import inspect
import traceback
import autopage.argparse
from . import command
class HelpExit(SystemExit):
"""Special exception type to trigger quick exit from the application
We subclass from SystemExit to preserve API compatibility for
anything that used to catch SystemExit, but use a different class
so that cliff's Application can tell the difference between
something trying to hard-exit and help saying it's done.
"""
class HelpAction(argparse.Action):
"""Provide a custom action so the -h and --help options
to the main app will print a list of the commands.
The commands are determined by checking the CommandManager
instance, passed in as the "default" value for the action.
"""
def __call__(self, parser, namespace, values, option_string=None):
app = self.default
pager = autopage.argparse.help_pager(app.stdout)
color = pager.to_terminal()
autopage.argparse.use_color_for_parser(parser, color)
with pager as out:
parser.print_help(out)
title_hl = ('\033[4m', '\033[0m') if color else ('', '')
out.write('\n%sCommands%s:\n' % title_hl)
dists_by_module = command._get_distributions_by_modules()
def dist_for_obj(obj):
name = inspect.getmodule(obj).__name__.partition('.')[0]
return dists_by_module.get(name)
app_dist = dist_for_obj(app)
command_manager = app.command_manager
for name, ep in sorted(command_manager):
try:
factory = ep.load()
except Exception:
out.write('Could not load %r\n' % ep)
if namespace.debug:
traceback.print_exc(file=out)
continue
try:
kwargs = {}
fact_args = inspect.getfullargspec(factory.__init__).args
if 'cmd_name' in fact_args:
kwargs['cmd_name'] = name
cmd = factory(app, None, **kwargs)
if cmd.deprecated:
continue
except Exception as err:
out.write('Could not instantiate %r: %s\n' % (ep, err))
if namespace.debug:
traceback.print_exc(file=out)
continue
one_liner = cmd.get_description().split('\n')[0].rstrip('.')
dist_name = dist_for_obj(factory)
if dist_name and dist_name != app_dist:
dist_info = ' (' + dist_name + ')'
if color:
dist_info = '\033[90m%s\033[39m' % dist_info
else:
dist_info = ''
if color:
name = '\033[36m%s\033[39m' % name
out.write(' %-13s %s%s\n' % (name, one_liner, dist_info))
raise HelpExit()
class HelpCommand(command.Command):
"""print detailed help for another command
"""
def get_parser(self, prog_name):
parser = super(HelpCommand, self).get_parser(prog_name)
parser.add_argument('cmd',
nargs='*',
help='name of the command',
)
return parser
def take_action(self, parsed_args):
if parsed_args.cmd:
try:
the_cmd = self.app.command_manager.find_command(
parsed_args.cmd,
)
cmd_factory, cmd_name, search_args = the_cmd
except ValueError:
# Did not find an exact match
cmd = parsed_args.cmd[0]
fuzzy_matches = [k[0] for k in self.app.command_manager
if k[0].startswith(cmd)
]
if not fuzzy_matches:
raise
self.app.stdout.write('Command "%s" matches:\n' % cmd)
for fm in sorted(fuzzy_matches):
self.app.stdout.write(' %s\n' % fm)
return
self.app_args.cmd = search_args
kwargs = {}
if 'cmd_name' in inspect.getfullargspec(cmd_factory.__init__).args:
kwargs['cmd_name'] = cmd_name
cmd = cmd_factory(self.app, self.app_args, **kwargs)
full_name = (cmd_name
if self.app.interactive_mode
else ' '.join([self.app.NAME, cmd_name])
)
cmd_parser = cmd.get_parser(full_name)
pager = autopage.argparse.help_pager(self.app.stdout)
with pager as out:
autopage.argparse.use_color_for_parser(cmd_parser,
pager.to_terminal())
cmd_parser.print_help(out)
else:
action = HelpAction(None, None, default=self.app)
action(self.app.parser, self.app.options, None, None)
return 0
|