use crate::error::CommandError;

use clap::Arg;

use clap::ArgGroup;

use hg::operations::{debug_data, DebugDataKind};

use micro_timer::timed;

pub const HELP_TEXT: &str = "

Dump the contents of a data file revision

";

        .arg(

                .help("open changelog")

        )

        .arg(

                .help("open manifest")

        )

        .group(

                .args(&["changelog", "manifest"])

                .required(true),

        )

        .arg(

                .help("revision")

                .required(true)

                .value_name("REV"),

        )

        .about(HELP_TEXT)

}

#[timed]

pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {

    let args = invocation.subcommand_args;

    let rev = args

        .expect("rev should be a required argument");

    let repo = invocation.repo?;

    if repo.has_narrow() {

        return Err(CommandError::unsupported(

            "support for ellipsis nodes is missing and repo has narrow enabled",

        ));

    }

    let mut stdout = invocation.ui.stdout_buffer();

    stdout.write_all(&data)?;

    stdout.flush()?;

    Ok(())

}