| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import re |
| |
| class Grep: |
| |
| def __init__(self): |
| pass |
| |
| def grep(self, string, phrase, before, after): |
| """ |
| Tries to find the last occurence of phrase in a given string. String should consist of lines, |
| separated by line separators. String trim is performed before search. |
| If occurence is found, grep () takes not more than 'before' lines above and 'after' lines below. |
| If phrase is not found, returns None. Search is not case sensitive, regexps are not supported. |
| """ |
| stripped_string = string.strip() |
| lines = stripped_string.splitlines(True) |
| first_occurence = None |
| for index in range(len(lines)): |
| line = lines[index] |
| if phrase.lower() in line.lower(): |
| first_occurence = index |
| break |
| if first_occurence is None: |
| return None |
| bound_a = before |
| if first_occurence < before: |
| bound_a = first_occurence |
| result = None |
| if (len(lines) - first_occurence) < after: |
| result = lines[first_occurence - bound_a :] |
| else: |
| result = lines[first_occurence - bound_a : first_occurence + after + 1] |
| return "".join(result).strip() |
| |
| |
| def tail(self, string, n): |
| """ |
| Copies last n lines from string to result. Also, string trim is performed. |
| """ |
| stripped_string = string.strip() |
| lines = stripped_string.splitlines(True) |
| if len(lines) <= n: |
| return stripped_string |
| else: |
| length = len(lines) |
| tailed = lines[length - n:] |
| return "".join(tailed) |
| |
| def filterMarkup(self, string): |
| """ |
| Filters given string from puppet colour markup done using escape codes like [0;36m |
| """ |
| if string is None: |
| result = None |
| else: |
| regexp = "\x1b" + r"\[[\d;]{1,4}m" |
| result = re.sub(regexp, '', string) |
| return result |