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#!/usr/bin/env python3
import argparse
import concurrent.futures
import logging
import os.path
import re
import sys
import zipfile
from typing import Any, Dict, List, Optional, Tuple
import epub_meta
logging.basicConfig(format='%(levelname)s:%(funcName)s:%(message)s',
level=logging.INFO)
log = logging.getLogger('epubgrep')
def get_chapter_title(mdata: List[Dict[str, Any]], fname: str) \
-> Optional[Tuple[str, int]]:
if mdata is not None:
found_list = [(x['title'], x['index'])
for x in mdata if x['src'] == fname]
if len(found_list) > 0:
chap_title = found_list[0][0].strip(' \t.0123456789')
return chap_title, found_list[0][1]
else:
return ('Unknown', 0)
def _colorize_found(dline: str, res: re.Match, col: bool) -> str:
out = ''
if col:
found_line = dline.replace(
res.group(1),
"\033[31;1m" + res.group(1) + "\033[31;0m")
out += '{}\n'.format(found_line)
else:
out += dline + '\n'
return out
def _multiline_search(inf, sought_RE, printed_booktitle, filename,
counting, w_counting, metadata, zif) -> Tuple[int, str]:
out = ""
count = 0
decoded_str = inf.read().decode(errors='replace')
res = sought_RE.search(decoded_str)
if res:
if not printed_booktitle:
out += '{}\n'.format(filename)
printed_booktitle = True
if counting or w_counting:
count += 1
else:
chap_info = get_chapter_title(metadata.toc,
zif.filename)
out += "{}. {}:\n\n".format(chap_info[1], chap_info[0])
out += '{}\n\n'.format(res.group(0))
return count, out
def _singleline_search(inf, sought_RE, out_title, filename, counting,
w_counting, printed_booktitle, metadata, zif, color,
count) -> Tuple[int, str]:
out = ""
count = 0
printed_title = False
for line in inf:
decoded_line = line.decode(errors='replace').strip()
res = sought_RE.search(decoded_line)
if res:
if not out_title:
out_title = '{}'.format(filename)
if counting or w_counting:
count += 1
else:
if not printed_booktitle:
out += out_title + '\n'
printed_booktitle = True
if not printed_title:
chap_info = get_chapter_title(metadata.toc,
zif.filename)
if chap_info is not None:
out += "{}. {}:\n\n".format(chap_info[1],
chap_info[0])
printed_title = True
if not (counting or w_counting):
out += _colorize_found(decoded_line, res, color)
return count, out
def _description_search(mdata: dict, sre: re.Pattern, fname: str,
col: bool) -> str:
out = ''
decoded_line = mdata['description']
if decoded_line is None:
return out
res = sre.search(decoded_line)
if res:
title = '{}'.format(fname)
out += title + '\n'
out += _colorize_found(decoded_line, res, col)
return out
def grep_book(filename: str, pattern: str, flags: int, desc: bool = False,
counting: bool = False, w_counting: bool = False,
color: bool = False) -> Optional[str]:
assert os.path.isfile(filename), "{} is not EPub file.".format(filename)
sought_RE = re.compile('(' + pattern + ')', flags)
count = 0
icount = 0
out_title = ''
out = ''
iout = ''
mline = flags & re.M == re.M
try:
metadata = epub_meta.get_epub_metadata(filename)
except (epub_meta.EPubException, KeyError, IndexError):
log.exception('Failed to open {}'.format(filename))
return None
book = zipfile.ZipFile(filename)
printed_booktitle = False
if desc:
return _description_search(metadata, sought_RE, filename, color)
for zif in book.infolist():
with book.open(zif) as inf:
if mline:
icount, iout = _multiline_search(inf, sought_RE,
printed_booktitle, filename,
counting, w_counting,
metadata, zif)
count += icount
out += iout
else:
icount, iout = _singleline_search(inf, sought_RE, out_title,
filename, counting,
w_counting,
printed_booktitle, metadata,
zif, color, count)
count += icount
out += iout
if count > 0:
if counting:
out += '{:02d}:{}'.format(count, out_title)
if w_counting:
size = metadata['file_size_in_bytes']
out += '{:05d}:{}'.format(int((count/size)*1e5), out_title)
return out
def main():
parser = argparse.ArgumentParser(description='Grep through EPub book')
parser.add_argument('pattern')
parser.add_argument('files', nargs='+')
parser.add_argument('-c', '--count',
action='store_true',
help="just counts of found patterns")
parser.add_argument('-C', '--weighted-count',
action='store_true',
help="counts of found patterns as a proportion of whole text")
parser.add_argument('-d', '--description',
action='store_true',
help="search just in descriptions")
parser.add_argument('-i', '--ignore-case',
action='store_true',
help="make search case insensitive")
parser.add_argument('-o', '--color', '--colour',
action='store_false',
help="Do NOT mark found patterns with color")
parser.add_argument('-m', '--multi-line',
action='store_true',
help="make search multi line")
args = parser.parse_args()
# log.debug('args = %s', args)
search_flags = 0
if args.ignore_case:
search_flags |= re.I
if args.multi_line:
search_flags |= re.M | re.S
with concurrent.futures.ProcessPoolExecutor() as executor:
fut_to_fname = {executor.submit(grep_book,
os.path.realpath(filename),
args.pattern, search_flags,
args.description,
args.count, args.weighted_count,
args.color):
filename for filename in args.files}
for future in concurrent.futures.as_completed(fut_to_fname):
try:
data = future.result()
if data:
data = data.rstrip()
if (data is not None) and len(data) > 0:
print(data)
except (BrokenPipeError, KeyboardInterrupt):
sys.exit()
if __name__ == '__main__':
main()
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