solana/src/bin/genesis.rs

//! A command-line executable for generating the chain's genesis block.

extern crate atty;
extern crate serde_json;
extern crate solana;

use atty::{is, Stream};
use solana::entry_writer::EntryWriter;
use solana::mint::Mint;
use std::error;
use std::io::{stdin, stdout, Read};
use std::process::exit;

fn main() -> Result<(), Box<error::Error>> {
    if is(Stream::Stdin) {
        eprintln!("nothing found on stdin, expected a json file");
        exit(1);
    }

    let mut buffer = String::new();
    let num_bytes = stdin().read_to_string(&mut buffer)?;
    if num_bytes == 0 {
        eprintln!("empty file on stdin, expected a json file");
        exit(1);
    }

    let mint: Mint = serde_json::from_str(&buffer)?;
    let mut writer = stdout();
    EntryWriter::write_entries(&mut writer, mint.create_entries())?;
    Ok(())
}