Removes silt from .zsh_history file

trim_zsh_history.conf

#
brew\sinstall.*
brew\sinfo.*
brew\sprune.*
brew\sdoctor.*
brew\slink.*
brew\sunlink.*
brew\suntap\s
.*/Dropbox.*
which.*
ptr\s.*
ping.*
dig.*
rm\s.*
say\s.*
mpv\s.*
python3\scolortrans.py.*
.*/private/var/folders/zz/.*
# security\sadd-.*

trim_zsh_history.py

#!/usr/bin/env python3
#
# clean up zsh history
# takes .zsh_history file and removes lines according to set of regexes
#
import re
import os
import argparse
import shutil


def getArgs(argv=None):
    # Command line arguments.
    parser = argparse.ArgumentParser(description =
                        'Helps removing stilt from shell history',
                        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument('-p', '--pattern',
                        help='commandline regex pattern. If present --file is ignored')
    parser.add_argument('-f', '--file',
                        default='~/.config/trim_zsh_history.conf',
                        help='Location of config file containing patterns to remove')
    parser.add_argument('-o', '--overwrite', default=False,
                        action="store_true",
                        help='Overwrite hidden .zsh_history file in $HOME directory. Always creates hidden backup file.\
                        If not set result of operations is found in zsh_history_working_copy')
    parser.add_argument('-v', '--verbose', default=False,
                        action="store_true")
    return parser.parse_args(argv)


args = getArgs()
verbose = args.verbose
overwrite = args.overwrite
config_file = os.path.expanduser(args.file)
pattern = args.pattern

hist_line_start = '^:\s\d{10}:\d;'
hist_line_end = '$'
comment_pattern = re.compile('^#.*$')
# go to user $HOME folder
os.chdir(os.path.expanduser("~"))
# backup .zsh_history
shutil.copy('.zsh_history', '.zsh_history.bak')
# 1) flush working copy of zsh_history if exists
try:
    working_copy = open('zsh_history_working_copy', 'r')
    os.unlink('zsh_history_working_copy')   # touch zsh_history_working_copy first if it doesn't exist
    working_copy = open('zsh_history_working_copy', 'w')
except FileNotFoundError:
    working_copy = open('zsh_history_working_copy', 'w')
# 2) read config file (one regex per line) OR use commandline input
if pattern is None:
    with open(config_file, 'r') as cf:
      config_lines = cf.readlines()
else:
    config_lines = list()
    config_lines.append(pattern)
if verbose:
    for x in config_lines:
        print(x)
# 3) read zsh history and check matching patterns. if none write line to working copy
with open('.zsh_history', 'r', encoding='utf-8') as zsh_history:
    cntr = 0
    for hist_line in zsh_history.readlines():
        Match = False
        for config_line in config_lines:
            if re.match(comment_pattern, config_line):
                pass
            else:
                if verbose:
                    print(config_line)
                hist_line_pattern = r'' + hist_line_start + config_line + hist_line_end
                match = re.match(hist_line_pattern, hist_line)
                if match:
                    if verbose:
                        print(hist_line)
                    Match = True
                    cntr += 1
        if not Match:
            working_copy.write(hist_line)
    print('# ', cntr, ' lines removed from history')
# 4) clean up, overwrite .zsh_history
working_copy.close()

if overwrite:
    os.chdir(os.path.expanduser("~"))
    shutil.move('.zsh_history', '.zsh_history.bak')
    shutil.move('zsh_history_working_copy', '.zsh_history')
    print('\nTrimed history has been saved to ~/.zsh_history file.')
else:
    print('\nTrimed history has been saved to ~/zsh_history_working_copy.\nNo changes had been made to ~/.zsh_history.\nUse --overwrite option if you want to save changes to ~/.zsh_history')