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
|
# Copyright (C) 2012 Aldo Cortesi
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os, traceback
class ScriptError(Exception):
pass
class Script:
"""
The instantiator should do something along this vein:
s = Script(path, master)
s.load()
s.run("start")
"""
def __init__(self, path, ctx):
self.path, self.ctx = path, ctx
self.ns = None
def load(self):
"""
Loads a module.
Raises ScriptError on failure, with argument equal to an error
message that may be a formatted traceback.
"""
path = os.path.expanduser(self.path)
if not os.path.exists(path):
raise ScriptError("No such file: %s"%self.path)
if not os.path.isfile(path):
raise ScriptError("Not a file: %s"%self.path)
ns = {}
try:
execfile(path, ns, ns)
except Exception, v:
raise ScriptError(traceback.format_exc(v))
self.ns = ns
def run(self, name, *args, **kwargs):
"""
Runs a plugin method.
Returns:
(True, retval) on success.
(False, None) on nonexistent method.
(False, (exc, traceback string)) if there was an exception.
"""
f = self.ns.get(name)
if f:
try:
return (True, f(self.ctx, *args, **kwargs))
except Exception, v:
return (False, (v, traceback.format_exc(v)))
else:
return (False, None)
|
