view rust/rhg/src/commands/debugrequirements.rs @ 49640:37bc3edef76f

rhg: upgrade `clap` dependency

This one is the worst one to upgrade since v2 -> v4 broke a ton of API,
which thankfully seems saner now.

Contrary to what was done in the `hg-core/src/examples/nodemap` rewrite,
we're not switching from the "builder" pattern to the "derive" pattern,
since that would imply a much larger diff. It can be done incrementally.

use crate::error::CommandError;

pub const HELP_TEXT: &str = "
Print the current repo requirements.
";

pub fn args() -> clap::Command {
    clap::command!("debugrequirements").about(HELP_TEXT)
}

pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {
    let repo = invocation.repo?;
    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');
    }
    invocation.ui.write_stdout(output.as_bytes())?;
    Ok(())
}