use crate::error::CommandError;

use crate::ui::Ui;

use clap::ArgMatches;

use hg::config::Config;

use hg::repo::Repo;

pub const HELP_TEXT: &str = "

Print the current repo requirements.

";

pub fn args() -> clap::App<'static, 'static> {

    clap::SubCommand::with_name("debugrequirements").about(HELP_TEXT)

}

pub fn run(

    ui: &Ui,

    config: &Config,

    _args: &ArgMatches,

) -> Result<(), CommandError> {

    let mut output = String::new();

    let mut requirements: Vec<_> = repo.requirements().iter().collect();

    requirements.sort();

    for req in requirements {

        output.push_str(req);

        output.push('\n');

    }

    ui.write_stdout(output.as_bytes())?;

    Ok(())

}