mirror of
https://github.com/chubin/cheat.sh.git
synced 2026-06-20 21:26:44 +02:00
Igor Chubin
726 lines
23 KiB
Python
726 lines
23 KiB
Python
"""
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Main cheat.sh wrapper.
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Gets answer from the getters, add syntax highlighting or html markup and returns it.
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At the moment, it contains the getters that should be moved out to a separate file.
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"""
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from gevent.monkey import patch_all
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from gevent.subprocess import Popen, PIPE
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patch_all()
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# pylint: disable=wrong-import-position,wrong-import-order
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import sys
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import os
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import glob
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import re
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import random
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import string
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import collections
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import colored
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import redis
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from fuzzywuzzy import process, fuzz
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from pygments import highlight as pygments_highlight
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from pygments.formatters import Terminal256Formatter # pylint: disable=no-name-in-module
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from pygments.styles import get_all_styles
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MYDIR = os.path.abspath(os.path.dirname(os.path.dirname('__file__')))
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sys.path.append("%s/lib/" % MYDIR)
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from globals import error, ANSI2HTML, \
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PATH_TLDR_PAGES, PATH_CHEAT_PAGES, \
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PATH_CHEAT_SHEETS, PATH_CHEAT_SHEETS_SPOOL
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from buttons import TWITTER_BUTTON, GITHUB_BUTTON, GITHUB_BUTTON_FOOTER
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from adapter_learnxiny import get_learnxiny, get_learnxiny_list, is_valid_learnxy
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from languages_data import LEXER, LANGUAGE_ALIAS
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import beautifier
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# pylint: disable=wrong-import-position,wrong-import-order
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COLOR_STYLES = sorted(list(get_all_styles()))
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# globals
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INTERNAL_TOPICS = [
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":list",
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":firstpage",
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':post',
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':bash_completion',
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':help',
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':styles',
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':styles-demo',
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':emacs',
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':emacs-ivy',
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':fish',
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':bash',
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':zsh'
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]
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REDIS = redis.StrictRedis(host='localhost', port=6379, db=0)
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MAX_SEARCH_LEN = 20
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def _update_tldr_topics():
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answer = []
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for topic in glob.glob(PATH_TLDR_PAGES):
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_, filename = os.path.split(topic)
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if filename.endswith('.md'):
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answer.append(filename[:-3])
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return answer
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TLDR_TOPICS = _update_tldr_topics()
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def _update_cheat_topics():
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answer = []
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for topic in glob.glob(PATH_CHEAT_PAGES):
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_, filename = os.path.split(topic)
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answer.append(filename)
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return answer
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CHEAT_TOPICS = _update_cheat_topics()
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def _update_cheat_sheets_topics():
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answer = []
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answer_dirs = []
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for topic in glob.glob(PATH_CHEAT_SHEETS + "*/*"):
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dirname, filename = os.path.split(topic)
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dirname = os.path.basename(dirname)
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if dirname.startswith('_'):
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dirname = dirname[1:]
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answer.append("%s/%s" % (dirname, filename))
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for topic in glob.glob(PATH_CHEAT_SHEETS + "*"):
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_, filename = os.path.split(topic)
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if os.path.isdir(topic):
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if filename.startswith('_'):
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filename = filename[1:]
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answer_dirs.append(filename+'/')
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else:
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answer.append(filename)
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return answer, answer_dirs
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CHEAT_SHEETS_TOPICS, CHEAT_SHEETS_DIRS = _update_cheat_sheets_topics()
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ANSI_ESCAPE = re.compile(r'(\x9B|\x1B\[)[0-?]*[ -\/]*[@-~]')
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def remove_ansi(sometext):
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"""
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Remove ANSI sequences from `sometext` and convert it into plaintext.
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"""
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return ANSI_ESCAPE.sub('', sometext)
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def html_wrapper(data):
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"""
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Convert ANSI text `data` to HTML
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"""
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proc = Popen(
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["bash", ANSI2HTML, "--palette=solarized", "--bg=dark"],
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stdin=PIPE, stdout=PIPE, stderr=PIPE)
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data = data.encode('utf-8')
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stdout, stderr = proc.communicate(data)
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if proc.returncode != 0:
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error(stdout + stderr)
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return stdout.decode('utf-8')
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#
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#
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#
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CACHED_TOPICS_LIST = [[]]
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def get_topics_list(skip_dirs=False, skip_internal=False):
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"""
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List of topics returned on /:list
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"""
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if CACHED_TOPICS_LIST[0] != []:
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return CACHED_TOPICS_LIST[0]
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answer = CHEAT_TOPICS + TLDR_TOPICS + CHEAT_SHEETS_TOPICS
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answer = sorted(set(answer))
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# doing it in this strange way to save the order of the topics
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for topic in get_learnxiny_list():
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if topic not in answer:
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answer.append(topic)
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if not skip_dirs:
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answer += CHEAT_SHEETS_DIRS
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if not skip_internal:
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answer += INTERNAL_TOPICS
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CACHED_TOPICS_LIST[0] = answer
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return answer
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def _get_topics_dirs():
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return set([x.split('/', 1)[0] for x in get_topics_list() if '/' in x])
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def _get_stat():
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stat = collections.Counter([
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get_topic_type(topic) for topic in get_topics_list()
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])
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answer = ""
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for key, val in stat.items():
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answer += "%s %s\n" % (key, val)
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return answer
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#
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#
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#
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def get_topic_type(topic): # pylint: disable=too-many-locals,too-many-branches,too-many-statements
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"""
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Return topic type for `topic` or "unknown" if topic can't be determined.
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"""
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result = ''
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if topic == "":
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result = "search"
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elif topic.startswith(":"):
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result = "internal"
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elif '/' in topic:
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topic_type, topic_name = topic.split('/', 1)
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if '+' in topic_name:
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result = 'question'
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else:
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if topic_type in _get_topics_dirs() and topic_name in [':list']:
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result = "internal"
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elif is_valid_learnxy(topic):
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result = 'learnxiny'
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else:
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result = 'question'
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elif topic in CHEAT_SHEETS_TOPICS:
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result = "cheat.sheets"
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elif topic.rstrip('/') in CHEAT_SHEETS_DIRS and topic.endswith('/'):
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result = "cheat.sheets dir"
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elif topic in CHEAT_TOPICS:
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result = "cheat"
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elif topic in TLDR_TOPICS:
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result = "tldr"
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elif '+' in topic:
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result = "question"
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else:
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result = 'unknown'
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print topic, " ", result
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return result
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#
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# Various cheat sheets getters
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#
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#
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#def registered_answer_getter(func):
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# REGISTERED_ANSWER_GETTERS.append(funct)
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# return cls
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def _get_internal(topic):
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if '/' in topic:
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topic_type, topic_name = topic.split('/', 1)
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if topic_name == ":list":
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topic_list = [x[len(topic_type)+1:]
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for x in get_topics_list()
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if x.startswith(topic_type + "/")]
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return "\n".join(topic_list)+"\n"
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if topic == ":list":
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return "\n".join(x for x in get_topics_list()) + "\n"
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if topic == ':styles':
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return "\n".join(COLOR_STYLES) + "\n"
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if topic == ":stat":
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return _get_stat()+"\n"
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if topic in INTERNAL_TOPICS:
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return open(os.path.join(MYDIR, "share", topic[1:]+".txt"), "r").read()
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return ""
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def _get_tldr(topic):
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cmd = ["tldr", topic]
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proc = Popen(cmd, stdout=PIPE, stderr=PIPE)
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answer = proc.communicate()[0]
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fixed_answer = []
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for line in answer.splitlines():
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line = line[2:]
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if line.startswith('-'):
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line = '# '+line[2:]
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elif line == "":
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pass
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elif not line.startswith(' '):
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line = "# "+line
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fixed_answer.append(line)
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answer = "\n".join(fixed_answer) + "\n"
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return answer.decode('utf-8')
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def _get_cheat(topic):
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cmd = ["cheat", topic]
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proc = Popen(cmd, stdout=PIPE, stderr=PIPE)
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answer = proc.communicate()[0].decode('utf-8')
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return answer
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def _get_cheat_sheets(topic):
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"""
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Get the cheat sheet topic from the own repository (cheat.sheets).
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It's possible that topic directory starts with omited underscore
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"""
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filename = PATH_CHEAT_SHEETS + "%s" % topic
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if not os.path.exists(filename):
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filename = PATH_CHEAT_SHEETS + "_%s" % topic
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return open(filename, "r").read().decode('utf-8')
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def _get_cheat_sheets_dir(topic):
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answer = []
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for f_name in glob.glob(PATH_CHEAT_SHEETS + "%s/*" % topic.rstrip('/')):
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answer.append(os.path.basename(f_name))
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topics = sorted(answer)
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return "\n".join(topics) + "\n"
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def _get_answer_for_question(topic):
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"""
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Find answer for the `topic` question.
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"""
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topic = " ".join(topic.replace('+', ' ').strip().split())
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cmd = ["/home/igor/cheat.sh/bin/get-answer-for-question", topic]
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proc = Popen(cmd, stdout=PIPE, stderr=PIPE)
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answer = proc.communicate()[0].decode('utf-8')
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return answer
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def _get_unknown(topic):
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topics_list = get_topics_list()
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if topic.startswith(':'):
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topics_list = [x for x in topics_list if x.startswith(':')]
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else:
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topics_list = [x for x in topics_list if not x.startswith(':')]
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possible_topics = process.extract(topic, topics_list, scorer=fuzz.ratio)[:3]
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possible_topics_text = "\n".join([(" * %s %s" % x) for x in possible_topics])
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return """
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Unknown topic.
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Do you mean one of these topics may be?
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%s
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""" % possible_topics_text
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# pylint: disable=bad-whitespace
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#
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# topic_type, function_getter
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# should be replaced with a decorator
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TOPIC_GETTERS = (
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("cheat.sheets", _get_cheat_sheets),
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("cheat.sheets dir", _get_cheat_sheets_dir),
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("tldr", _get_tldr),
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("internal", _get_internal),
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("cheat", _get_cheat),
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("learnxiny", get_learnxiny),
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("question", _get_answer_for_question),
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("unknown", _get_unknown),
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)
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# pylint: enable=bad-whitespace
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def get_answer(topic, keyword, options="", request_options=None): # pylint: disable=too-many-locals,too-many-branches,too-many-statements
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"""
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Find cheat sheet for the topic.
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If `keyword` is None or rempty, return the whole answer.
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Otherwise cut the paragraphs containing keywords.
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Args:
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topic (str): the name of the topic of the cheat sheet
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keyword (str): the name of the keywords to search in the cheat sheets
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Returns:
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string: the cheat sheet
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"""
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def _join_paragraphs(paragraphs):
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answer = "\n".join(paragraphs)
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return answer
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def _split_paragraphs(text):
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answer = []
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paragraph = ""
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for line in text.splitlines():
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if line == "":
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answer.append(paragraph)
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paragraph = ""
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else:
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paragraph += line+"\n"
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answer.append(paragraph)
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return answer
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def _paragraph_contains(paragraph, keyword, insensitive=False, word_boundaries=True):
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"""
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Check if `paragraph` contains `keyword`.
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Several keywords can be joined together using ~
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For example: ~ssh~passphrase
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"""
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answer = True
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if '~' in keyword:
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keywords = keyword.split('~')
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else:
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keywords = [keyword]
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for kwrd in keywords:
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regex = re.escape(kwrd)
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if not word_boundaries:
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regex = r"\b%s\b" % kwrd
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if insensitive:
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answer = answer and bool(re.search(regex, paragraph, re.IGNORECASE))
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else:
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answer = answer and bool(re.search(regex, paragraph))
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return answer
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answer = None
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needs_beautification = False
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# checking if the answer is in the cache
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if topic != "":
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# temporary hack for "questions":
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# the topic name has to be prefixed with q:
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# so we can later delete them from redis
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# and we known that they need beautification
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if '/' in topic and '+' in topic:
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topic = "q:" + topic
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needs_beautification = True
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answer = REDIS.get(topic)
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if answer:
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answer = answer.decode('utf-8')
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# if answer was not found in the cache
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# try to find it in one of the repositories
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if not answer:
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topic_type = get_topic_type(topic)
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for topic_getter_type, topic_getter in TOPIC_GETTERS:
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if topic_type == topic_getter_type:
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answer = topic_getter(topic)
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break
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if not answer:
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answer = _get_unknown(topic)
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# saving answers in the cache
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if topic_type not in ["search", "internal", "unknown"]:
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REDIS.set(topic, answer)
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if needs_beautification:
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filetype = 'bash'
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if '/' in topic:
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filetype = topic.split('/', 1)[0]
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if filetype.startswith('q:'):
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filetype = filetype[2:]
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answer = beautifier.beautify(answer.encode('utf-8'), filetype, request_options)
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if not keyword:
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return answer
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#
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# shorten the answer, because keyword is specified
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#
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insensitive = 'i' in options
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word_boundaries = 'b' in options
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paragraphs = _split_paragraphs(answer)
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paragraphs = [p for p in paragraphs
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if _paragraph_contains(p, keyword,
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insensitive=insensitive,
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word_boundaries=word_boundaries)]
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if paragraphs == []:
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return ""
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answer = _join_paragraphs(paragraphs)
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return answer
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def find_answer_by_keyword(directory, keyword, options="", request_options=None):
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"""
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Search in the whole tree of all cheatsheets or in its subtree `directory`
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by `keyword`
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"""
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recursive = 'r' in options
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answer_paragraphs = []
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for topic in get_topics_list(skip_internal=True, skip_dirs=True):
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# skip the internal pages, don't show them in search
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if topic in INTERNAL_TOPICS:
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continue
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if not topic.startswith(directory):
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continue
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subtopic = topic[len(directory):]
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if not recursive and '/' in subtopic:
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continue
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answer = get_answer(topic, keyword, options=options, request_options=request_options)
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if answer:
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answer_paragraphs.append((topic, answer))
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if len(answer_paragraphs) > MAX_SEARCH_LEN:
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answer_paragraphs.append(("LIMITED", "LIMITED TO %s ANSWERS" % MAX_SEARCH_LEN))
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break
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return answer_paragraphs
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#
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#========================>8 cut here 8<===================================================
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#
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def save_cheatsheet(topic_name, cheatsheet):
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"""
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Save posted cheat sheet `cheatsheet` with `topic_name`
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in the spool directory
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"""
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nonce = ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(9))
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filename = topic_name.replace('/', '.') + "." + nonce
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filename = os.path.join(PATH_CHEAT_SHEETS_SPOOL, filename)
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open(filename, 'w').write(cheatsheet)
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#
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#
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#
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def _colorize_internal(topic, answer, html_needed):
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def _colorize_line(line):
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if line.startswith('T'):
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line = colored.fg("grey_62") + line + colored.attr('reset')
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line = re.sub(r"\{(.*?)\}", colored.fg("orange_3") + r"\1"+colored.fg('grey_35'), line)
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return line
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line = re.sub(r"\[(F.*?)\]",
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colored.bg("black") + colored.fg("cyan") + r"[\1]"+colored.attr('reset'),
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line)
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line = re.sub(r"\[(g.*?)\]",
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colored.bg("dark_gray") \
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+ colored.fg("grey_0") \
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+ r"[\1]"+colored.attr('reset'),
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line)
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line = re.sub(r"\{(.*?)\}",
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colored.fg("orange_3") + r"\1"+colored.attr('reset'),
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line)
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line = re.sub(r"<(.*?)>",
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colored.fg("cyan") + r"\1"+colored.attr('reset'),
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line)
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return line
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if topic in [':list', ':bash_completion']:
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return answer
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if topic == ':firstpage':
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lines = answer.splitlines()
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answer_lines = lines[:9]
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answer_lines.append(colored.fg('grey_35')+lines[9]+colored.attr('reset'))
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for line in lines[10:]:
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answer_lines.append(_colorize_line(line))
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if html_needed:
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answer_lines = answer_lines[:-2]
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answer = "\n".join(answer_lines) + "\n"
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return answer
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def _github_button(topic_type):
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repository = {
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"cheat.sheets" : 'chubin/cheat.sheets',
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"cheat.sheets dir" : 'chubin/cheat.sheets',
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"tldr" : 'tldr-pages/tldr',
|
|
"cheat" : 'chrisallenlane/cheat',
|
|
"learnxiny" : 'adambard/learnxinyminutes-docs',
|
|
"internal" : '',
|
|
"search" : '',
|
|
"unknown" : '',
|
|
}
|
|
|
|
full_name = repository.get(topic_type, '')
|
|
if not full_name:
|
|
return ''
|
|
|
|
short_name = full_name.split('/', 1)[1] # pylint: disable=unused-variable
|
|
|
|
button = (
|
|
"<!-- Place this tag where you want the button to render. -->"
|
|
'<a aria-label="Star %(full_name)s on GitHub"'
|
|
' data-count-aria-label="# stargazers on GitHub"'
|
|
' data-count-api="/repos/%(full_name)s#stargazers_count"'
|
|
' data-count-href="/%(full_name)s/stargazers"'
|
|
' data-icon="octicon-star"'
|
|
' href="https://github.com/%(full_name)s"'
|
|
' class="github-button">%(short_name)s</a>'
|
|
) % locals()
|
|
return button
|
|
|
|
#
|
|
|
|
def _rewrite_aliases(word):
|
|
if word == ':bash.completion':
|
|
return ':bash_completion'
|
|
return word
|
|
|
|
def _rewrite_section_name(query):
|
|
"""
|
|
"""
|
|
if '/' not in query:
|
|
return query
|
|
|
|
section_name, rest = query.split('/', 1)
|
|
section_name = LANGUAGE_ALIAS.get(section_name, section_name)
|
|
return "%s/%s" % (section_name, rest)
|
|
|
|
def cheat_wrapper(query, request_options=None, html=False): # pylint: disable=too-many-locals,too-many-branches,too-many-statements
|
|
"""
|
|
Giant megafunction that delivers cheat sheet for `query`.
|
|
If `html` is True, the answer is formated as HTML.
|
|
Additional request options specified in `request_options`.
|
|
|
|
This function is really really bad, and should be rewritten
|
|
as soon as possible.
|
|
"""
|
|
|
|
#
|
|
# at the moment, we just remove trailing slashes
|
|
# so queries python/ and python are equal
|
|
#
|
|
query = query.rstrip('/')
|
|
|
|
query = _rewrite_aliases(query)
|
|
query = _rewrite_section_name(query)
|
|
|
|
highlight = not bool(request_options and request_options.get('no-terminal'))
|
|
color_style = request_options.get('style', '')
|
|
if color_style not in COLOR_STYLES:
|
|
color_style = ''
|
|
|
|
keyword = None
|
|
if '~' in query:
|
|
topic = query
|
|
pos = topic.index('~')
|
|
keyword = topic[pos+1:]
|
|
topic = topic[:pos]
|
|
|
|
options = ""
|
|
if '/' in keyword:
|
|
options = keyword[::-1]
|
|
options = options[:options.index('/')]
|
|
keyword = keyword[:-len(options)-1]
|
|
|
|
answers = find_answer_by_keyword(
|
|
topic, keyword, options=options, request_options=request_options)
|
|
search_mode = True
|
|
else:
|
|
answers = [(query, get_answer(query, keyword, request_options=request_options))]
|
|
search_mode = False
|
|
|
|
|
|
found = True # if the page was found in the database
|
|
editable = False # can generated page be edited on github (only cheat.sheets pages can)
|
|
result = ""
|
|
for topic, answer in answers: # pylint: disable=too-many-nested-blocks
|
|
|
|
if topic == 'LIMITED':
|
|
result += colored.bg('dark_goldenrod') \
|
|
+ colored.fg('yellow_1') \
|
|
+ ' ' + answer + ' ' \
|
|
+ colored.attr('reset') + "\n"
|
|
break
|
|
|
|
if topic in [":list", ":bash_completion"]:
|
|
highlight = False
|
|
|
|
topic_type = get_topic_type(topic)
|
|
if topic_type == 'unknown':
|
|
found = False
|
|
|
|
if highlight:
|
|
#if topic_type.endswith(" dir"):
|
|
# pass
|
|
|
|
if topic_type == "internal":
|
|
answer = _colorize_internal(topic, answer, html)
|
|
else:
|
|
color_style = color_style or "native"
|
|
lexer = LEXER['bash']
|
|
for lexer_name, lexer_value in LEXER.items():
|
|
if topic.startswith('cpp'):
|
|
topic = 'c++' + topic[3:]
|
|
|
|
if topic.startswith("%s/" % lexer_name):
|
|
color_style = color_style or "monokai"
|
|
if lexer_name == 'php':
|
|
answer = "<?\n%s?>\n" % answer
|
|
lexer = lexer_value
|
|
break
|
|
|
|
formatter = Terminal256Formatter(style=color_style)
|
|
answer = pygments_highlight(answer, lexer(), formatter).lstrip('\n')
|
|
|
|
if topic_type == "cheat.sheets":
|
|
editable = True
|
|
|
|
if search_mode:
|
|
if highlight:
|
|
result += "\n%s%s %s %s%s\n" % (colored.bg('dark_gray'),
|
|
colored.attr("res_underlined"),
|
|
topic,
|
|
colored.attr("res_underlined"),
|
|
colored.attr('reset'))
|
|
else:
|
|
result += "\n[%s]\n" % topic
|
|
|
|
result += answer
|
|
|
|
if search_mode:
|
|
result = result[1:]
|
|
editable = False
|
|
repository_button = ''
|
|
else:
|
|
repository_button = _github_button(topic_type)
|
|
|
|
if html:
|
|
result = result + "\n$"
|
|
result = html_wrapper(result)
|
|
title = "<title>cheat.sh/%s</title>" % topic
|
|
# title += ('\n<link rel="stylesheet" href="/files/awesomplete.css" />script'
|
|
# ' src="/files/awesomplete.min.js" async></script>')
|
|
# submit button: thanks to http://stackoverflow.com/questions/477691/
|
|
submit_button = ('<input type="submit" style="position: absolute;'
|
|
' left: -9999px; width: 1px; height: 1px;" tabindex="-1" />')
|
|
topic_list = ('<datalist id="topics">%s</datalist>'
|
|
% ("\n".join("<option value='%s'></option>" % x for x in get_topics_list())))
|
|
|
|
curl_line = "<span class='pre'>$ curl cheat.sh/</span>"
|
|
if query == ':firstpage':
|
|
query = ""
|
|
form_html = ('<form action="/" method="GET"/>'
|
|
'%s%s'
|
|
'<input'
|
|
' type="text" value="%s" name="topic"'
|
|
' list="topics" autofocus autocomplete="off"/>'
|
|
'%s'
|
|
'</form>') \
|
|
% (submit_button, curl_line, query, topic_list)
|
|
|
|
edit_button = ''
|
|
if editable:
|
|
# It's possible that topic directory starts with omited underscore
|
|
if '/' in topic:
|
|
topic = '_' + topic
|
|
edit_page_link = 'https://github.com/chubin/cheat.sheets/edit/master/sheets/' + topic
|
|
edit_button = (
|
|
'<pre style="position:absolute;padding-left:40em;overflow:visible;height:0;">'
|
|
'[<a href="%s" style="color:cyan">edit</a>]'
|
|
'</pre>') % edit_page_link
|
|
result = re.sub("<pre>", edit_button + form_html + "<pre>", result)
|
|
result = re.sub("<head>", "<head>" + title, result)
|
|
if not request_options.get('quiet'):
|
|
result = result.replace('</body>',
|
|
TWITTER_BUTTON \
|
|
+ GITHUB_BUTTON \
|
|
+ repository_button \
|
|
+ GITHUB_BUTTON_FOOTER \
|
|
+ '</body>')
|
|
|
|
return result, found
|