Wrapper to simplify recursive grep with a pearl regex expression in the current working directory

rpgrep.py

#!/usr/bin/python

#
# Wrapper to simplify a recursive grep with a pearl compatible regular expression
#

# MIT License
# 
# Copyright (c) 2023 Nikolas Koesling <[email protected]>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

import argparse
import sys
import subprocess

__VERSION__ = "1.0.0"


def main():
    # parse args
    parser = argparse.ArgumentParser(
        description="Recursive grep with a pearl regular expression")
    parser.add_argument("--no-line-number", action="store_true", 
                        help="Do not prefix each line of output with the line number within its input file")
    parser.add_argument("-v", "--invert-match", action="store_true", 
                        help="select non-matching lines")
    parser.add_argument("-i", "--ignore-case", action="store_true",
                        help="Ignore case distinctions in patterns and input data")
    parser.add_argument("--no-color", action="store_true", help="disable colored output")
    parser.add_argument("--version", action="store_true", help="print version and exit")
    parser.add_argument("--no-follow-links", action="store_true", help="don'f follow symbolic links")
    parser.add_argument('pattern', type=str, help="search pattern (pearl compatible regex)") 
    parser.add_argument('path', type=str, help="search path (default: current working directory)", 
                        nargs='?', default=".")
    args = parser.parse_args()

    if args.version:
        print(f"rpgrep {__VERSION__}")
        exit(0)

    # create grep flags
    flags = f"-{'r' if args.no_follow_links else 'R'}P"
    if not args.no_line_number:
        flags += "n"
    if args.invert_match:
        flags += "v"
    if args.ignore_case:
        flags += "i"

    cmd = ["grep", flags]
    
    # colorize if output is a tty and no-color is not set
    if args.no_color:
        cmd.append("--color=never")
    elif sys.stdout.isatty():
        cmd.append("--color=always")
    else:
        cmd.append("--color=auto")

    cmd.append(args.pattern)
    cmd.append(args.path)
    
    # execute command
    x = subprocess.call(cmd)
    exit(x)


if __name__ == "__main__":
    main()