root / kamaki / cli / command_tree.py @ de73876b
History | View | Annotate | Download (7.6 kB)
1 |
# Copyright 2012 GRNET S.A. All rights reserved.
|
---|---|
2 |
#
|
3 |
# Redistribution and use in source and binary forms, with or
|
4 |
# without modification, are permitted provided that the following
|
5 |
# conditions are met:
|
6 |
#
|
7 |
# 1. Redistributions of source code must retain the above
|
8 |
# copyright notice, this list of conditions and the following
|
9 |
# disclaimer.
|
10 |
#
|
11 |
# 2. Redistributions in binary form must reproduce the above
|
12 |
# copyright notice, this list of conditions and the following
|
13 |
# disclaimer in the documentation and/or other materials
|
14 |
# provided with the distribution.
|
15 |
#
|
16 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 |
# POSSIBILITY OF SUCH DAMAGE.
|
28 |
#
|
29 |
# The views and conclusions contained in the software and
|
30 |
# documentation are those of the authors and should not be
|
31 |
# interpreted as representing official policies, either expressed
|
32 |
# or implied, of GRNET S.A.
|
33 |
|
34 |
|
35 |
class Command(object): |
36 |
"""Store a command and the next-level (2 levels)"""
|
37 |
_name = None
|
38 |
path = None
|
39 |
cmd_class = None
|
40 |
subcommands = {} |
41 |
help = ' '
|
42 |
|
43 |
def __init__(self, path, help=' ', subcommands={}, cmd_class=None): |
44 |
self.path = path
|
45 |
self.help = help
|
46 |
self.subcommands = dict(subcommands) |
47 |
self.cmd_class = cmd_class
|
48 |
|
49 |
@property
|
50 |
def name(self): |
51 |
if self._name is None: |
52 |
self._name = self.path.split('_')[-1] |
53 |
return str(self._name) |
54 |
|
55 |
def add_subcmd(self, subcmd): |
56 |
if subcmd.path == '%s_%s' % (self.path, subcmd.name): |
57 |
self.subcommands[subcmd.name] = subcmd
|
58 |
return True |
59 |
return False |
60 |
|
61 |
def get_subcmd(self, name): |
62 |
try:
|
63 |
return self.subcommands[name] |
64 |
except KeyError: |
65 |
return None |
66 |
|
67 |
def contains(self, name): |
68 |
"""Check if a name is a direct child of self"""
|
69 |
return name in self.subcommands |
70 |
|
71 |
@property
|
72 |
def is_command(self): |
73 |
return self.cmd_class is not None |
74 |
|
75 |
@property
|
76 |
def has_description(self): |
77 |
return len(self.help.strip()) > 0 |
78 |
|
79 |
@property
|
80 |
def description(self): |
81 |
return self.help |
82 |
|
83 |
@property
|
84 |
def parent_path(self): |
85 |
parentpath, sep, name = self.path.rpartition('_') |
86 |
return parentpath
|
87 |
|
88 |
def set_class(self, cmd_class): |
89 |
self.cmd_class = cmd_class
|
90 |
|
91 |
def get_class(self): |
92 |
return self.cmd_class |
93 |
|
94 |
def has_subname(self, subname): |
95 |
return subname in self.subcommands |
96 |
|
97 |
def get_subnames(self): |
98 |
return self.subcommands.keys() |
99 |
|
100 |
def get_subcommands(self): |
101 |
return self.subcommands.values() |
102 |
|
103 |
def sublen(self): |
104 |
return len(self.subcommands) |
105 |
|
106 |
def parse_out(self, args): |
107 |
cmd = self
|
108 |
index = 0
|
109 |
for term in args: |
110 |
try:
|
111 |
cmd = cmd.subcommands[term] |
112 |
except KeyError: |
113 |
break
|
114 |
index += 1
|
115 |
return cmd, args[index:]
|
116 |
|
117 |
def pretty_print(self, recursive=False): |
118 |
print('Path: %s (Name: %s) is_cmd: %s\n\thelp: %s' % (
|
119 |
self.path,
|
120 |
self.name,
|
121 |
self.is_command,
|
122 |
self.help))
|
123 |
for cmd in self.get_subcommands(): |
124 |
cmd.pretty_print(recursive) |
125 |
|
126 |
|
127 |
class CommandTree(object): |
128 |
|
129 |
groups = {} |
130 |
_all_commands = {} |
131 |
name = None
|
132 |
description = None
|
133 |
|
134 |
def __init__(self, name, description=''): |
135 |
self.name = name
|
136 |
self.description = description
|
137 |
|
138 |
def add_command(self, command_path, description=None, cmd_class=None): |
139 |
terms = command_path.split('_')
|
140 |
try:
|
141 |
cmd = self.groups[terms[0]] |
142 |
except KeyError: |
143 |
cmd = Command(terms[0])
|
144 |
self.groups[terms[0]] = cmd |
145 |
self._all_commands[terms[0]] = cmd |
146 |
path = terms[0]
|
147 |
for term in terms[1:]: |
148 |
path += '_' + term
|
149 |
try:
|
150 |
cmd = cmd.subcommands[term] |
151 |
except KeyError: |
152 |
new_cmd = Command(path) |
153 |
self._all_commands[path] = new_cmd
|
154 |
cmd.add_subcmd(new_cmd) |
155 |
cmd = new_cmd |
156 |
if cmd_class is not None: |
157 |
cmd.set_class(cmd_class) |
158 |
if description is not None: |
159 |
cmd.help = description |
160 |
|
161 |
def find_best_match(self, terms): |
162 |
"""Find a command that best matches a given list of terms
|
163 |
|
164 |
:param terms: (list of str) match them against paths in cmd_tree
|
165 |
|
166 |
:returns: (Command, list) the matching command, the remaining terms
|
167 |
"""
|
168 |
path = [] |
169 |
for term in terms: |
170 |
check_path = path + [term] |
171 |
if '_'.join(check_path) not in self._all_commands: |
172 |
break
|
173 |
path = check_path |
174 |
if path:
|
175 |
return (self._all_commands['_'.join(path)], terms[len(path):]) |
176 |
return (None, terms) |
177 |
|
178 |
def add_tree(self, new_tree): |
179 |
tname = new_tree.name |
180 |
tdesc = new_tree.description |
181 |
self.groups.update(new_tree.groups)
|
182 |
self._all_commands.update(new_tree._all_commands)
|
183 |
self.set_description(tname, tdesc)
|
184 |
|
185 |
def has_command(self, path): |
186 |
return path in self._all_commands |
187 |
|
188 |
def get_command(self, path): |
189 |
return self._all_commands[path] |
190 |
|
191 |
def get_groups(self): |
192 |
return self.groups.values() |
193 |
|
194 |
def get_group_names(self): |
195 |
return self.groups.keys() |
196 |
|
197 |
def set_description(self, path, description): |
198 |
self._all_commands[path].help = description
|
199 |
|
200 |
def get_description(self, path): |
201 |
return self._all_commands[path].help |
202 |
|
203 |
def set_class(self, path, cmd_class): |
204 |
self._all_commands[path].set_class(cmd_class)
|
205 |
|
206 |
def get_class(self, path): |
207 |
return self._all_commands[path].get_class() |
208 |
|
209 |
def get_subnames(self, path=None): |
210 |
if path in (None, ''): |
211 |
return self.get_group_names() |
212 |
return self._all_commands[path].get_subnames() |
213 |
|
214 |
def get_subcommands(self, path=None): |
215 |
if path in (None, ''): |
216 |
return self.get_groups() |
217 |
return self._all_commands[path].get_subcommands() |
218 |
|
219 |
def get_parent(self, path): |
220 |
if '_' not in path: |
221 |
return None |
222 |
terms = path.split('_')
|
223 |
parent_path = '_'.join(terms[:-1]) |
224 |
return self._all_commands[parent_path] |
225 |
|
226 |
def get_closest_ancestor_command(self, path): |
227 |
path, sep, name = path.rpartition('_')
|
228 |
while len(path) > 0: |
229 |
cmd = self._all_commands[path]
|
230 |
if cmd.is_command:
|
231 |
return cmd
|
232 |
path, sep, name = path.rpartition('_')
|
233 |
return None |
234 |
|
235 |
if '_' not in path: |
236 |
return None |
237 |
terms = path.split()[:-1]
|
238 |
while len(terms) > 0: |
239 |
tmp_path = '_'.join(terms)
|
240 |
cmd = self._all_commands[tmp_path]
|
241 |
if cmd.is_command:
|
242 |
return cmd
|
243 |
terms = terms[:-1]
|
244 |
raise KeyError('No ancestor commands') |
245 |
|
246 |
def pretty_print(self, group=None): |
247 |
if group is None: |
248 |
for group in self.groups: |
249 |
self.pretty_print(group)
|
250 |
else:
|
251 |
self.groups[group].pretty_print(recursive=True) |