Rust JSON Pretty-Print CLI

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

intermediaterustunverified

Project

rust-json-pretty-cli

Entry point: main.rs

Install

cargo run -- data.json

Run

cargo run -- sample.json

Test

cargo test

Expected output

Reads JSON, re-indents with two spaces, and prints it.

Dependencies

rust >=1.75
serde_json 1.0

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 JSON Pretty-Print CLI is a self-contained rust command-line program. Reads JSON, re-indents with two spaces, and prints it.

Install and run

cargo run -- data.json
cargo run -- sample.json

Project structure

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

Key source

// main.rs
use serde_json::{Value, from_str, to_string_pretty}; use std::fs;
fn main() {
    let s = fs::read_to_string(std::env::args().nth(1).unwrap()).unwrap();
    let v: Value = from_str(&s).unwrap();
    println!("{}", to_string_pretty(&v).unwrap());
}

Testing

cargo test

Expected output

When run with the documented command, the program prints:

{\n  "a": 1\n}

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.