Minigrep is a simple command-line search tool written in Rust, inspired by the classic grep utility. It allows users to search for lines containing a specified query string within a file. The tool supports both case-sensitive and case-insensitive searches, with the latter being controlled via an environment variable. Additionally, Minigrep adheres to proper command-line application practices by distinguishing between standard output and standard error, making it easier to handle and redirect outputs in terminal sessions.
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Running a Case-Sensitive Search:
cargo run -- <query> <file_path>
Example:
cargo run -- to poem.txt
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Running a Case-Insensitive Search: Set the
IGNORE_CASEenvironment variable before running the command.IGNORE_CASE=1 cargo run -- <query> <file_path>
Example:
IGNORE_CASE=1 cargo run -- to poem.txt
In PowerShell:
$Env:IGNORE_CASE=1; cargo run -- to poem.txt
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Redirecting Output to a File: You can redirect the standard output to a file while keeping error messages visible in the terminal.
cargo run -- <query> <file_path> > output.txt
This tool is a great way to practice Rust concepts such as handling command-line arguments, working with environment variables, performing file I/O, and managing errors effectively.
For detailed notes refer to the Notes section