root / kamaki / cli / history.py @ 38a79780
History | View | Annotate | Download (3.1 kB)
1 |
#!/usr/bin/env python
|
---|---|
2 |
|
3 |
# Copyright 2012-2013 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 |
import codecs |
37 |
|
38 |
|
39 |
class History(object): |
40 |
def __init__(self, filepath, token=None): |
41 |
self.filepath = filepath
|
42 |
self.token = token
|
43 |
|
44 |
@classmethod
|
45 |
def _match(self, line, match_terms): |
46 |
if match_terms is None: |
47 |
return True |
48 |
for term in match_terms.split(): |
49 |
if term not in line: |
50 |
return False |
51 |
return True |
52 |
|
53 |
def get(self, match_terms=None, limit=0): |
54 |
limit = int(limit or 0) |
55 |
with codecs.open(self.filepath, mode='r', encoding='utf-8') as f: |
56 |
result = [u'%s. \t%s' % (
|
57 |
i + 1, line) for i, line in enumerate(f.readlines()) |
58 |
if self._match(line, match_terms)] |
59 |
return result[- limit:]
|
60 |
|
61 |
def add(self, line): |
62 |
line = line.replace(self.token, '...') if self.token else line |
63 |
with open(self.filepath, 'a+') as f: |
64 |
f.write(line + '\n')
|
65 |
|
66 |
def clean(self): |
67 |
with open(self.filepath, 'w'): |
68 |
pass
|
69 |
|
70 |
def retrieve(self, cmd_id): |
71 |
"""
|
72 |
:param cmd_id: (int) the id of the command to retrieve can be positive
|
73 |
or negative, zero values are ignored
|
74 |
|
75 |
:returns: (str) the stored command record without the id
|
76 |
"""
|
77 |
cmd_id = int(cmd_id)
|
78 |
if not cmd_id: |
79 |
return None |
80 |
with open(self.filepath) as f: |
81 |
try:
|
82 |
cmd_list = f.readlines()[:-1] # exclude current command |
83 |
return cmd_list[cmd_id - (1 if cmd_id > 0 else 0)] |
84 |
except IndexError: |
85 |
return None |