Pattern Search Utility

Search through files and output lines matching a given pattern. Supports basic, extended, and Perl-compatible regular expressions.

Usage

grep-tool [options] <pattern> [file...]

Common Options

• -i: Case-insensitive search
• -r: Recursive directory search
• -n: Show line numbers
• -v: Invert match (show non-matching lines)
• -c: Count matches instead of showing lines

Examples

# Case-insensitive search
grep-tool -i "error" log.txt

# Recursive search
grep-tool -r "function" ./src

# Count matches
grep-tool -c "TODO" *.py