changelog 0.3.4

Changelog generator
Documentation 
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#![cfg_attr(feature = "nightly", deny(missing_docs))]
#![cfg_attr(feature = "nightly", feature(external_doc))]
#![cfg_attr(feature = "nightly", doc(include = "../README.md"))]
#![cfg_attr(test, deny(warnings))]

use changelog::Cli;
use exitfailure::ExitFailure;
use structopt::StructOpt;

fn main() -> Result<(), ExitFailure> {
  human_panic::setup_panic!();
  let args = Cli::from_args();
  args.log(env!("CARGO_PKG_NAME"))?;
  let path = args.path();

  let repo_url = changelog::read_repo(&path)?;
  let (tag, commits) = changelog::all_commits(&path)?;
  let mut msg = changelog::format(&tag, &commits, &repo_url);

  let diff = changelog::full_diff(&path)?;
  msg.push_str(&changelog::stats(&diff)?);

  match args.file() {
    Some(outfile) => changelog::prepend_file(outfile, &msg)?,
    None => print!("{}", msg),
  }

  Ok(())
}