Minigrep

A simple command-line text search utility written in Rust. Search for patterns in files with support for case-sensitive and case-insensitive matching.

Features

• Case-sensitive search: Find exact matches of your query
• Case-insensitive search: Find matches regardless of letter casing
• Simple CLI: Easy-to-use command-line interface
• File reading: Efficiently reads and searches through file contents

Building

Make sure you have Rust installed, then:

cargo build --release

The compiled binary will be available at target/release/minigrep.

Usage

Basic search (case-sensitive)

cargo run -- <query> <file>

Example:

cargo run -- "safe" poem.txt

Case-insensitive search

Set the IGNORE_CASE environment variable to perform case-insensitive search:

IGNORE_CASE=1 cargo run -- <query> <file>

Example:

IGNORE_CASE=1 cargo run -- "rust" poem.txt

Project Structure

src/
├── main.rs    - Entry point, CLI argument parsing, and file I/O
└── lib.rs     - Core search functions and tests

Testing

Run the test suite:

cargo test

The project includes tests for:

• Case-sensitive search functionality
• Case-insensitive search functionality
• Correct filtering of matching lines

Example

Given a file poem.txt with content:

Rust:
safe, fast, productive.
Pick three.

Running:

cargo run -- "safe" poem.txt

Will output:

safe, fast, productive.

License

MIT