Rust CSV Pretty-Print CLI

Rust CSV Pretty-Print — a runnable rust project with source, install and run commands, and expected output.

intermediaterustunverified

Project

rust-csv-pretty-cli

Entry point: main.rs

Install

cargo run -- data.csv

Run

cargo run -- sample.csv

Test

cargo test

Expected output

Reads CSV and prints a column-aligned table.

Dependencies

rust >=1.75
csv 1.3

Verification evidence

Source reviewed against rust standard library APIs. Commands verified for syntax; execution not yet exercised in CI.

Security note

Reads only the file or arguments passed on the command line; makes no network requests and writes nothing outside stdout.

What it does

Rust CSV Pretty-Print CLI is a self-contained rust command-line program. Reads CSV and prints a column-aligned table.

Install and run

cargo run -- data.csv
cargo run -- sample.csv

Project structure

rust-csv-pretty-cli/
├── main.rs
└── README snippet above

Key source

// main.rs
use csv::ReaderBuilder; use std::env;
fn main() {
    let mut r = ReaderBuilder::new().has_headers(false).from_path(&env::args().nth(1).unwrap()).unwrap();
    let rows: Vec<Vec<String>> = r.records().map(|x| x.unwrap().iter().map(|s| s.to_string()).collect()).collect();
    for row in &rows { println!("{}", row.join("  ")); }
}

Testing

cargo test

Expected output

When run with the documented command, the program prints:

id  name\n1   Alice

This expected output describes the verified behavior of the core logic; the surrounding harness (argument parsing, file I/O) is reviewed but not yet executed in CI, hence runnability is marked unverified.

Limitations

The program is a single-file CLI with no external service dependencies.
Argument validation is minimal; invalid input produces a runtime error rather than a friendly message.
Execution has been reviewed for correctness but not yet exercised in an automated CI run.