root / kamaki / cli / command_tree / __init__.py @ 45606fd9
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1 | e3f01d64 | Stavros Sachtouris | # Copyright 2012-2013 GRNET S.A. All rights reserved.
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2 | 00af4193 | Stavros Sachtouris | #
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3 | 00af4193 | Stavros Sachtouris | # Redistribution and use in source and binary forms, with or
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4 | 00af4193 | Stavros Sachtouris | # without modification, are permitted provided that the following
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5 | 00af4193 | Stavros Sachtouris | # conditions are met:
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6 | 00af4193 | Stavros Sachtouris | #
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7 | 00af4193 | Stavros Sachtouris | # 1. Redistributions of source code must retain the above
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8 | fd5db045 | Stavros Sachtouris | # copyright notice, this list of conditions and the following
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9 | fd5db045 | Stavros Sachtouris | # disclaimer.
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10 | 00af4193 | Stavros Sachtouris | #
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11 | 00af4193 | Stavros Sachtouris | # 2. Redistributions in binary form must reproduce the above
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12 | fd5db045 | Stavros Sachtouris | # copyright notice, this list of conditions and the following
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13 | fd5db045 | Stavros Sachtouris | # disclaimer in the documentation and/or other materials
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14 | fd5db045 | Stavros Sachtouris | # provided with the distribution.
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15 | 00af4193 | Stavros Sachtouris | #
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16 | 00af4193 | Stavros Sachtouris | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 00af4193 | Stavros Sachtouris | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 00af4193 | Stavros Sachtouris | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 00af4193 | Stavros Sachtouris | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 00af4193 | Stavros Sachtouris | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 00af4193 | Stavros Sachtouris | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 00af4193 | Stavros Sachtouris | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 00af4193 | Stavros Sachtouris | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 00af4193 | Stavros Sachtouris | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 00af4193 | Stavros Sachtouris | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 00af4193 | Stavros Sachtouris | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 00af4193 | Stavros Sachtouris | # POSSIBILITY OF SUCH DAMAGE.
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28 | 00af4193 | Stavros Sachtouris | #
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29 | 00af4193 | Stavros Sachtouris | # The views and conclusions contained in the software and
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30 | 00af4193 | Stavros Sachtouris | # documentation are those of the authors and should not be
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31 | 00af4193 | Stavros Sachtouris | # interpreted as representing official policies, either expressed
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32 | 00af4193 | Stavros Sachtouris | # or implied, of GRNET S.A.
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33 | 00af4193 | Stavros Sachtouris | |
34 | fd5db045 | Stavros Sachtouris | |
35 | 00af4193 | Stavros Sachtouris | class Command(object): |
36 | fd5db045 | Stavros Sachtouris | """Store a command and the next-level (2 levels)"""
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37 | fd5db045 | Stavros Sachtouris | _name = None
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38 | fd5db045 | Stavros Sachtouris | path = None
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39 | fd5db045 | Stavros Sachtouris | cmd_class = None
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40 | fd5db045 | Stavros Sachtouris | subcommands = {} |
41 | fd5db045 | Stavros Sachtouris | help = ' '
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42 | fd5db045 | Stavros Sachtouris | |
43 | fd5db045 | Stavros Sachtouris | def __init__(self, path, help=' ', subcommands={}, cmd_class=None): |
44 | 2fde8651 | Stavros Sachtouris | assert path, 'Cannot initialize a command without a command path' |
45 | fd5db045 | Stavros Sachtouris | self.path = path
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46 | 2fde8651 | Stavros Sachtouris | self.help = help or '' |
47 | 2fde8651 | Stavros Sachtouris | self.subcommands = dict(subcommands) if subcommands else {} |
48 | 2fde8651 | Stavros Sachtouris | self.cmd_class = cmd_class or None |
49 | fd5db045 | Stavros Sachtouris | |
50 | fd5db045 | Stavros Sachtouris | @property
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51 | fd5db045 | Stavros Sachtouris | def name(self): |
52 | 2fde8651 | Stavros Sachtouris | if not self._name: |
53 | fd5db045 | Stavros Sachtouris | self._name = self.path.split('_')[-1] |
54 | fd5db045 | Stavros Sachtouris | return str(self._name) |
55 | fd5db045 | Stavros Sachtouris | |
56 | fd5db045 | Stavros Sachtouris | def add_subcmd(self, subcmd): |
57 | fd5db045 | Stavros Sachtouris | if subcmd.path == '%s_%s' % (self.path, subcmd.name): |
58 | fd5db045 | Stavros Sachtouris | self.subcommands[subcmd.name] = subcmd
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59 | fd5db045 | Stavros Sachtouris | return True |
60 | fd5db045 | Stavros Sachtouris | return False |
61 | fd5db045 | Stavros Sachtouris | |
62 | fd5db045 | Stavros Sachtouris | def get_subcmd(self, name): |
63 | fd5db045 | Stavros Sachtouris | try:
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64 | fd5db045 | Stavros Sachtouris | return self.subcommands[name] |
65 | fd5db045 | Stavros Sachtouris | except KeyError: |
66 | fd5db045 | Stavros Sachtouris | return None |
67 | fd5db045 | Stavros Sachtouris | |
68 | fd5db045 | Stavros Sachtouris | def contains(self, name): |
69 | fd5db045 | Stavros Sachtouris | """Check if a name is a direct child of self"""
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70 | fd5db045 | Stavros Sachtouris | return name in self.subcommands |
71 | fd5db045 | Stavros Sachtouris | |
72 | fd5db045 | Stavros Sachtouris | @property
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73 | fd5db045 | Stavros Sachtouris | def is_command(self): |
74 | eb46e9a1 | Stavros Sachtouris | return len(self.subcommands) == 0 if self.cmd_class else False |
75 | fd5db045 | Stavros Sachtouris | |
76 | fd5db045 | Stavros Sachtouris | @property
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77 | fd5db045 | Stavros Sachtouris | def parent_path(self): |
78 | eb46e9a1 | Stavros Sachtouris | try:
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79 | 9a22e094 | Stavros Sachtouris | return self.path[:self.path.rindex('_')] |
80 | eb46e9a1 | Stavros Sachtouris | except ValueError: |
81 | eb46e9a1 | Stavros Sachtouris | return '' |
82 | fd5db045 | Stavros Sachtouris | |
83 | fd5db045 | Stavros Sachtouris | def parse_out(self, args): |
84 | 9a22e094 | Stavros Sachtouris | """Find the deepest subcommand matching a series of terms
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85 | 9a22e094 | Stavros Sachtouris | but stop the first time a term doesn't match
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86 | 9a22e094 | Stavros Sachtouris |
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87 | 9a22e094 | Stavros Sachtouris | :param args: (list) terms to match commands against
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88 | 9a22e094 | Stavros Sachtouris |
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89 | 9a22e094 | Stavros Sachtouris | :returns: (parsed out command, the rest of the arguments)
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90 | 9a22e094 | Stavros Sachtouris |
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91 | 9a22e094 | Stavros Sachtouris | :raises TypeError: if args is not inalterable
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92 | 9a22e094 | Stavros Sachtouris | """
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93 | fd5db045 | Stavros Sachtouris | cmd = self
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94 | fd5db045 | Stavros Sachtouris | index = 0
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95 | fd5db045 | Stavros Sachtouris | for term in args: |
96 | fd5db045 | Stavros Sachtouris | try:
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97 | fd5db045 | Stavros Sachtouris | cmd = cmd.subcommands[term] |
98 | fd5db045 | Stavros Sachtouris | except KeyError: |
99 | fd5db045 | Stavros Sachtouris | break
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100 | fd5db045 | Stavros Sachtouris | index += 1
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101 | fd5db045 | Stavros Sachtouris | return cmd, args[index:]
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102 | fd5db045 | Stavros Sachtouris | |
103 | fd5db045 | Stavros Sachtouris | def pretty_print(self, recursive=False): |
104 | d252a7a8 | Stavros Sachtouris | print('%s\t\t(Name: %s is_cmd: %s help: %s)' % (
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105 | d252a7a8 | Stavros Sachtouris | self.path, self.name, self.is_command, self.help)) |
106 | eb46e9a1 | Stavros Sachtouris | for cmd in self.subcommands.values(): |
107 | fd5db045 | Stavros Sachtouris | cmd.pretty_print(recursive) |
108 | fd5db045 | Stavros Sachtouris | |
109 | 00af4193 | Stavros Sachtouris | |
110 | d9325478 | Stavros Sachtouris | class CommandTree(object): |
111 | d9325478 | Stavros Sachtouris | |
112 | fd5db045 | Stavros Sachtouris | def __init__(self, name, description=''): |
113 | fd5db045 | Stavros Sachtouris | self.name = name
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114 | fd5db045 | Stavros Sachtouris | self.description = description
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115 | d252a7a8 | Stavros Sachtouris | self.groups = dict() |
116 | d252a7a8 | Stavros Sachtouris | self._all_commands = dict() |
117 | fd5db045 | Stavros Sachtouris | |
118 | 320aac17 | Stavros Sachtouris | def exclude(self, groups_to_exclude=[]): |
119 | 320aac17 | Stavros Sachtouris | for group in groups_to_exclude: |
120 | 320aac17 | Stavros Sachtouris | self.groups.pop(group, None) |
121 | 320aac17 | Stavros Sachtouris | |
122 | fd5db045 | Stavros Sachtouris | def add_command(self, command_path, description=None, cmd_class=None): |
123 | fd5db045 | Stavros Sachtouris | terms = command_path.split('_')
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124 | fd5db045 | Stavros Sachtouris | try:
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125 | fd5db045 | Stavros Sachtouris | cmd = self.groups[terms[0]] |
126 | fd5db045 | Stavros Sachtouris | except KeyError: |
127 | fd5db045 | Stavros Sachtouris | cmd = Command(terms[0])
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128 | fd5db045 | Stavros Sachtouris | self.groups[terms[0]] = cmd |
129 | fd5db045 | Stavros Sachtouris | self._all_commands[terms[0]] = cmd |
130 | fd5db045 | Stavros Sachtouris | path = terms[0]
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131 | fd5db045 | Stavros Sachtouris | for term in terms[1:]: |
132 | fd5db045 | Stavros Sachtouris | path += '_' + term
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133 | fd5db045 | Stavros Sachtouris | try:
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134 | fd5db045 | Stavros Sachtouris | cmd = cmd.subcommands[term] |
135 | fd5db045 | Stavros Sachtouris | except KeyError: |
136 | fd5db045 | Stavros Sachtouris | new_cmd = Command(path) |
137 | fd5db045 | Stavros Sachtouris | self._all_commands[path] = new_cmd
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138 | fd5db045 | Stavros Sachtouris | cmd.add_subcmd(new_cmd) |
139 | fd5db045 | Stavros Sachtouris | cmd = new_cmd |
140 | d252a7a8 | Stavros Sachtouris | cmd.cmd_class = cmd_class or None |
141 | d252a7a8 | Stavros Sachtouris | cmd.help = description or None |
142 | fd5db045 | Stavros Sachtouris | |
143 | fce93ff6 | Stavros Sachtouris | def find_best_match(self, terms): |
144 | fce93ff6 | Stavros Sachtouris | """Find a command that best matches a given list of terms
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145 | fce93ff6 | Stavros Sachtouris |
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146 | d252a7a8 | Stavros Sachtouris | :param terms: (list of str) match against paths in cmd_tree, e.g.
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147 | d252a7a8 | Stavros Sachtouris | ['aa', 'bb', 'cc'] matches aa_bb_cc
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148 | fce93ff6 | Stavros Sachtouris |
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149 | d252a7a8 | Stavros Sachtouris | :returns: (Command, list) the matching command, the remaining terms or
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150 | d252a7a8 | Stavros Sachtouris | None
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151 | fce93ff6 | Stavros Sachtouris | """
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152 | fce93ff6 | Stavros Sachtouris | path = [] |
153 | fce93ff6 | Stavros Sachtouris | for term in terms: |
154 | fce93ff6 | Stavros Sachtouris | check_path = path + [term] |
155 | fce93ff6 | Stavros Sachtouris | if '_'.join(check_path) not in self._all_commands: |
156 | fce93ff6 | Stavros Sachtouris | break
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157 | fce93ff6 | Stavros Sachtouris | path = check_path |
158 | fce93ff6 | Stavros Sachtouris | if path:
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159 | fce93ff6 | Stavros Sachtouris | return (self._all_commands['_'.join(path)], terms[len(path):]) |
160 | fce93ff6 | Stavros Sachtouris | return (None, terms) |
161 | fce93ff6 | Stavros Sachtouris | |
162 | 6514457a | Stavros Sachtouris | def add_tree(self, new_tree): |
163 | 6514457a | Stavros Sachtouris | tname = new_tree.name |
164 | 6514457a | Stavros Sachtouris | tdesc = new_tree.description |
165 | 6514457a | Stavros Sachtouris | self.groups.update(new_tree.groups)
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166 | 6514457a | Stavros Sachtouris | self._all_commands.update(new_tree._all_commands)
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167 | d252a7a8 | Stavros Sachtouris | try:
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168 | d252a7a8 | Stavros Sachtouris | self._all_commands[tname].help = tdesc
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169 | d252a7a8 | Stavros Sachtouris | except KeyError: |
170 | d252a7a8 | Stavros Sachtouris | self.add_command(tname, tdesc)
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171 | 6514457a | Stavros Sachtouris | |
172 | 0d249b3e | Stavros Sachtouris | def has_command(self, path): |
173 | 0d249b3e | Stavros Sachtouris | return path in self._all_commands |
174 | 0d249b3e | Stavros Sachtouris | |
175 | fd5db045 | Stavros Sachtouris | def get_command(self, path): |
176 | fd5db045 | Stavros Sachtouris | return self._all_commands[path] |
177 | fd5db045 | Stavros Sachtouris | |
178 | d252a7a8 | Stavros Sachtouris | def subnames(self, path=None): |
179 | de73876b | Stavros Sachtouris | if path in (None, ''): |
180 | d252a7a8 | Stavros Sachtouris | return self.groups.keys() |
181 | eb46e9a1 | Stavros Sachtouris | return self._all_commands[path].subcommands.keys() |
182 | fd5db045 | Stavros Sachtouris | |
183 | fd5db045 | Stavros Sachtouris | def get_subcommands(self, path=None): |
184 | eb46e9a1 | Stavros Sachtouris | return self._all_commands[path].subcommands.values() if ( |
185 | d252a7a8 | Stavros Sachtouris | path) else self.groups.values() |
186 | fd5db045 | Stavros Sachtouris | |
187 | fd5db045 | Stavros Sachtouris | def pretty_print(self, group=None): |
188 | fd5db045 | Stavros Sachtouris | if group is None: |
189 | fd5db045 | Stavros Sachtouris | for group in self.groups: |
190 | fd5db045 | Stavros Sachtouris | self.pretty_print(group)
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191 | fd5db045 | Stavros Sachtouris | else:
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192 | fd5db045 | Stavros Sachtouris | self.groups[group].pretty_print(recursive=True) |