root / kamaki / cli / history.py @ edaf3ba6
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#!/usr/bin/env python
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# Copyright 2012-2013 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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import codecs |
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class History(object): |
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def __init__(self, filepath, token=None, max_lines=0): |
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self.filepath = filepath
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self.token = token
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self.max_lines = max_lines
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def __getitem__(self, cmd_id): |
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cmd_id = int(cmd_id)
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if not cmd_id: |
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return None |
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with open(self.filepath) as f: |
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try:
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cmd_list = f.readlines()[:-1] # exclude current command |
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return cmd_list[cmd_id - (1 if cmd_id > 0 else 0)] |
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except IndexError: |
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return None |
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@classmethod
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def _match(self, line, match_terms): |
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if match_terms is None: |
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return True |
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for term in match_terms.split(): |
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if term not in line: |
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return False |
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return True |
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def get(self, match_terms=None, limit=0): |
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limit = int(limit or 0) |
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with codecs.open(self.filepath, mode='r', encoding='utf-8') as f: |
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result = [u'%s. \t%s' % (
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i + 1, line) for i, line in enumerate(f.readlines()) |
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if self._match(line, match_terms)] |
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return result[- limit:]
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def add(self, line): |
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line = line.replace(self.token, '...') if self.token else line |
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with open(self.filepath, 'a+') as f: |
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f.write(line + '\n')
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def empty(self): |
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with open(self.filepath, 'w'): |
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pass
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def clean(self): |
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"""DEPRECATED in version 0.14"""
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return self.empty() |
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def retrieve(self, cmd_id): |
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"""DEPRECATED in version 0.14"""
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return self[cmd_id] |