simit 0.17.7

Semver-aware git commit helper for Rust projects
Documentation 
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use std::fs::File;
use std::io::{BufReader, Read};
use std::path::Path;

use anyhow::{Context, Result};
use sha2::{Digest, Sha256};

pub fn sha256_of_file(path: &Path) -> Result<String> {
    let file = File::open(path).with_context(|| format!("opening {}", path.display()))?;
    let mut reader = BufReader::with_capacity(64 * 1024, file);
    let mut hasher = Sha256::new();
    let mut buffer = [0_u8; 64 * 1024];

    loop {
        let read = reader
            .read(&mut buffer)
            .with_context(|| format!("reading {}", path.display()))?;
        if read == 0 {
            break;
        }
        hasher.update(&buffer[..read]);
    }

    Ok(hex::encode(hasher.finalize()))
}