root / kamaki / cli / __init__.py @ f3e94e06
History | View | Annotate | Download (11.4 kB)
1 |
#!/usr/bin/env python
|
---|---|
2 |
|
3 |
# Copyright 2011-2012 GRNET S.A. All rights reserved.
|
4 |
#
|
5 |
# Redistribution and use in source and binary forms, with or
|
6 |
# without modification, are permitted provided that the following
|
7 |
# conditions are met:
|
8 |
#
|
9 |
# 1. Redistributions of source code must retain the above
|
10 |
# copyright notice, this list of conditions and the following
|
11 |
# disclaimer.
|
12 |
#
|
13 |
# 2. Redistributions in binary form must reproduce the above
|
14 |
# copyright notice, this list of conditions and the following
|
15 |
# disclaimer in the documentation and/or other materials
|
16 |
# provided with the distribution.
|
17 |
#
|
18 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
19 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
20 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
21 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
22 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
23 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
24 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
25 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
26 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
27 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
28 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
29 |
# POSSIBILITY OF SUCH DAMAGE.
|
30 |
#
|
31 |
# The views and conclusions contained in the software and
|
32 |
# documentation are those of the authors and should not be
|
33 |
# interpreted as representing official policies, either expressed
|
34 |
# or implied, of GRNET S.A.
|
35 |
|
36 |
from __future__ import print_function |
37 |
|
38 |
import gevent.monkey |
39 |
#Monkey-patch everything for gevent early on
|
40 |
gevent.monkey.patch_all() |
41 |
|
42 |
import logging |
43 |
|
44 |
from inspect import getargspec |
45 |
from argparse import ArgumentParser, ArgumentError |
46 |
from os.path import basename |
47 |
from sys import exit, stdout, stderr, argv |
48 |
|
49 |
try:
|
50 |
from collections import OrderedDict |
51 |
except ImportError: |
52 |
from ordereddict import OrderedDict |
53 |
|
54 |
#from kamaki import clients
|
55 |
from .errors import CLIError, CLISyntaxError, CLICmdIncompleteError, CLICmdSpecError |
56 |
from .config import Config #TO BE REMOVED |
57 |
from .utils import bold, magenta, red, yellow, print_list, print_dict |
58 |
from .command_tree import CommandTree |
59 |
from argument import _arguments, parse_known_args |
60 |
|
61 |
cmd_spec_locations = [ |
62 |
'kamaki.cli.commands',
|
63 |
'kamaki.commands',
|
64 |
'kamaki.cli',
|
65 |
'kamaki',
|
66 |
'']
|
67 |
_commands = CommandTree(name='kamaki', description='A command line tool for poking clouds') |
68 |
|
69 |
#If empty, all commands are loaded, if not empty, only commands in this list
|
70 |
#e.g. [store, lele, list, lolo] is good to load store_list but not list_store
|
71 |
#First arg should always refer to a group
|
72 |
candidate_command_terms = [] |
73 |
allow_no_commands = False
|
74 |
allow_all_commands = False
|
75 |
allow_subclass_signatures = False
|
76 |
|
77 |
def _allow_class_in_cmd_tree(cls): |
78 |
global allow_all_commands
|
79 |
if allow_all_commands:
|
80 |
return True |
81 |
global allow_no_commands
|
82 |
if allow_no_commands:
|
83 |
return False |
84 |
|
85 |
term_list = cls.__name__.split('_')
|
86 |
global candidate_command_terms
|
87 |
index = 0
|
88 |
for term in candidate_command_terms: |
89 |
try:
|
90 |
index += 1 if term_list[index] == term else 0 |
91 |
except IndexError: #Whole term list matched! |
92 |
return True |
93 |
if allow_subclass_signatures:
|
94 |
if index == len(candidate_command_terms) and len(term_list) > index: |
95 |
try: #is subterm already in _commands? |
96 |
_commands.get_command('_'.join(term_list[:index+1])) |
97 |
except KeyError: #No, so it must be placed there |
98 |
return True |
99 |
return False |
100 |
|
101 |
return True if index == len(term_list) else False |
102 |
|
103 |
def command(): |
104 |
"""Class decorator that registers a class as a CLI command"""
|
105 |
|
106 |
def decorator(cls): |
107 |
"""Any class with name of the form cmd1_cmd2_cmd3_... is accepted"""
|
108 |
|
109 |
if not _allow_class_in_cmd_tree(cls): |
110 |
return cls
|
111 |
|
112 |
cls.description, sep, cls.long_description = cls.__doc__.partition('\n')
|
113 |
|
114 |
# Generate a syntax string based on main's arguments
|
115 |
spec = getargspec(cls.main.im_func) |
116 |
args = spec.args[1:]
|
117 |
n = len(args) - len(spec.defaults or ()) |
118 |
required = ' '.join('<%s>' % x.replace('____', '[:').replace('___', ':').replace('__',']').\ |
119 |
replace('_', ' ') for x in args[:n]) |
120 |
optional = ' '.join('[%s]' % x.replace('____', '[:').replace('___', ':').replace('__', ']').\ |
121 |
replace('_', ' ') for x in args[n:]) |
122 |
cls.syntax = ' '.join(x for x in [required, optional] if x) |
123 |
if spec.varargs:
|
124 |
cls.syntax += ' <%s ...>' % spec.varargs
|
125 |
|
126 |
#store each term, one by one, first
|
127 |
_commands.add_command(cls.__name__, cls.description, cls) |
128 |
return cls
|
129 |
return decorator
|
130 |
|
131 |
def _update_parser(parser, arguments): |
132 |
for name, argument in arguments.items(): |
133 |
try:
|
134 |
argument.update_parser(parser, name) |
135 |
except ArgumentError:
|
136 |
pass
|
137 |
|
138 |
def _init_parser(exe): |
139 |
parser = ArgumentParser(add_help=False)
|
140 |
parser.prog='%s <cmd_group> [<cmd_subbroup> ...] <cmd>'%exe
|
141 |
_update_parser(parser, _arguments) |
142 |
return parser
|
143 |
|
144 |
def _print_error_message(cli_err, verbose=False): |
145 |
errmsg = unicode(cli_err) + (' (%s)'%cli_err.status if cli_err.status else ' ') |
146 |
if cli_err.importance == 1: |
147 |
errmsg = magenta(errmsg) |
148 |
elif cli_err.importance == 2: |
149 |
errmsg = yellow(errmsg) |
150 |
elif cli_err.importance > 2: |
151 |
errmsg = red(errmsg) |
152 |
stdout.write(errmsg) |
153 |
if verbose and cli_err.details is not None and len(cli_err.details) > 0: |
154 |
print(': %s'%cli_err.details)
|
155 |
else:
|
156 |
print() |
157 |
|
158 |
def get_command_group(unparsed): |
159 |
groups = _arguments['config'].get_groups()
|
160 |
for grp_candidate in unparsed: |
161 |
if grp_candidate in groups: |
162 |
unparsed.remove(grp_candidate) |
163 |
return grp_candidate
|
164 |
return None |
165 |
|
166 |
def load_command(group, unparsed, reload_package=False): |
167 |
global candidate_command_terms
|
168 |
candidate_command_terms = [group] + unparsed |
169 |
pkg = load_group_package(group, reload_package) |
170 |
|
171 |
#From all possible parsed commands, chose the first match in user string
|
172 |
final_cmd = _commands.get_command(group) |
173 |
for term in unparsed: |
174 |
cmd = final_cmd.get_subcmd(term) |
175 |
if cmd is not None: |
176 |
final_cmd = cmd |
177 |
unparsed.remove(cmd.name) |
178 |
return final_cmd
|
179 |
|
180 |
def shallow_load(): |
181 |
"""Load only group names and descriptions"""
|
182 |
global allow_no_commands
|
183 |
allow_no_commands = True#load only descriptions |
184 |
for grp in _arguments['config'].get_groups(): |
185 |
load_group_package(grp) |
186 |
allow_no_commands = False
|
187 |
|
188 |
def load_group_package(group, reload_package=False): |
189 |
spec_pkg = _arguments['config'].value.get(group, 'cli') |
190 |
for location in cmd_spec_locations: |
191 |
location += spec_pkg if location == '' else ('.'+spec_pkg) |
192 |
try:
|
193 |
package = __import__(location, fromlist=['API_DESCRIPTION']) |
194 |
except ImportError: |
195 |
continue
|
196 |
if reload_package:
|
197 |
reload(package)
|
198 |
for grp, descr in package.API_DESCRIPTION.items(): |
199 |
_commands.add_command(grp, descr) |
200 |
return package
|
201 |
raise CLICmdSpecError(details='Cmd Spec Package %s load failed'%spec_pkg) |
202 |
|
203 |
def print_commands(prefix=None, full_depth=False): |
204 |
cmd_list = _commands.get_groups() if prefix is None else _commands.get_subcommands(prefix) |
205 |
cmds = {} |
206 |
for subcmd in cmd_list: |
207 |
if subcmd.sublen() > 0: |
208 |
sublen_str = '( %s more terms ... )'%subcmd.sublen()
|
209 |
cmds[subcmd.name] = [subcmd.help, sublen_str] if subcmd.has_description else subcmd_str |
210 |
else:
|
211 |
cmds[subcmd.name] = subcmd.help |
212 |
if len(cmds) > 0: |
213 |
print('\nOptions:')
|
214 |
print_dict(cmds, ident=12)
|
215 |
if full_depth:
|
216 |
_commands.pretty_print() |
217 |
|
218 |
def setup_logging(silent=False, debug=False, verbose=False, include=False): |
219 |
"""handle logging for clients package"""
|
220 |
|
221 |
def add_handler(name, level, prefix=''): |
222 |
h = logging.StreamHandler() |
223 |
fmt = logging.Formatter(prefix + '%(message)s')
|
224 |
h.setFormatter(fmt) |
225 |
logger = logging.getLogger(name) |
226 |
logger.addHandler(h) |
227 |
logger.setLevel(level) |
228 |
|
229 |
if silent:
|
230 |
add_handler('', logging.CRITICAL)
|
231 |
elif debug:
|
232 |
add_handler('requests', logging.INFO, prefix='* ') |
233 |
add_handler('clients.send', logging.DEBUG, prefix='> ') |
234 |
add_handler('clients.recv', logging.DEBUG, prefix='< ') |
235 |
elif verbose:
|
236 |
add_handler('requests', logging.INFO, prefix='* ') |
237 |
add_handler('clients.send', logging.INFO, prefix='> ') |
238 |
add_handler('clients.recv', logging.INFO, prefix='< ') |
239 |
elif include:
|
240 |
add_handler('clients.recv', logging.INFO)
|
241 |
else:
|
242 |
add_handler('', logging.WARNING)
|
243 |
|
244 |
def one_command(): |
245 |
_debug = False
|
246 |
_help = False
|
247 |
_verbose = False
|
248 |
try:
|
249 |
|
250 |
exe = basename(argv[0])
|
251 |
parser = _init_parser(exe) |
252 |
parsed, unparsed = parse_known_args(parser) |
253 |
_history = _arguments['history']
|
254 |
if _history.value:
|
255 |
cmd_list = [term for term in argv if term not in _history.parsed_name] |
256 |
print_list(_history.get(' '.join(cmd_list)))
|
257 |
_arguments['history'].add(' '.join(argv)) |
258 |
exit(0) |
259 |
_arguments['history'].add(' '.join(argv)) |
260 |
_debug = _arguments['debug'].value
|
261 |
_help = _arguments['help'].value
|
262 |
_verbose = _arguments['verbose'].value
|
263 |
if _arguments['version'].value: |
264 |
exit(0) |
265 |
|
266 |
group = get_command_group(unparsed) |
267 |
if group is None: |
268 |
parser.print_help() |
269 |
shallow_load() |
270 |
print_commands(full_depth=_debug) |
271 |
exit(0) |
272 |
|
273 |
cmd = load_command(group, unparsed) |
274 |
if _help or not cmd.is_command: |
275 |
if cmd.has_description:
|
276 |
parser.description = cmd.help |
277 |
else:
|
278 |
try:
|
279 |
parser.description = _commands.get_closest_ancestor_command(cmd.path).help |
280 |
except KeyError: |
281 |
parser.description = ' '
|
282 |
parser.prog = '%s %s '%(exe, cmd.path.replace('_', ' ')) |
283 |
if cmd.is_command:
|
284 |
cli = cmd.get_class() |
285 |
parser.prog += cli.syntax |
286 |
_update_parser(parser, cli().arguments) |
287 |
else:
|
288 |
parser.prog += '[...]'
|
289 |
parser.print_help() |
290 |
|
291 |
#Shuuuut, we now have to load one more level just to see what is missing
|
292 |
global allow_subclass_signatures
|
293 |
allow_subclass_signatures = True
|
294 |
load_command(group, cmd.path.split('_')[1:], reload_package=True) |
295 |
|
296 |
print_commands(cmd.path, full_depth=_debug) |
297 |
exit(0) |
298 |
|
299 |
setup_logging(silent=_arguments['silent'].value, debug=_debug, verbose=_verbose,
|
300 |
include=_arguments['include'].value)
|
301 |
cli = cmd.get_class() |
302 |
executable = cli(_arguments) |
303 |
_update_parser(parser, executable.arguments) |
304 |
parser.prog = '%s %s %s'%(exe, cmd.path.replace('_', ' '), cli.syntax) |
305 |
parsed, new_unparsed = parse_known_args(parser) |
306 |
unparsed = [term for term in unparsed if term in new_unparsed] |
307 |
try:
|
308 |
ret = executable.main(*unparsed) |
309 |
exit(ret)
|
310 |
except TypeError as e: |
311 |
if e.args and e.args[0].startswith('main()'): |
312 |
parser.print_help() |
313 |
exit(1) |
314 |
else:
|
315 |
raise
|
316 |
except CLIError as err: |
317 |
if _debug:
|
318 |
raise
|
319 |
_print_error_message(err, verbose=_verbose) |
320 |
exit(1) |