nils-plan-issue 1.0.0

CLI crate for nils-plan-issue in the nils-cli workspace.
Documentation 
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use std::io::{self, Write};

use clap::CommandFactory;
use clap_complete::{Shell, generate};

use crate::BinaryFlavor;
use crate::cli::Cli;
use crate::commands::completion::CompletionShell;

pub fn run(binary: BinaryFlavor, shell: CompletionShell) -> i32 {
    let mut command = Cli::command().name(binary.binary_name());
    let bin_name = binary.binary_name();

    match shell {
        CompletionShell::Bash => print_completion(Shell::Bash, &mut command, bin_name),
        CompletionShell::Zsh => print_completion(Shell::Zsh, &mut command, bin_name),
    }

    0
}

fn print_completion(generator: Shell, command: &mut clap::Command, bin_name: &str) {
    if matches!(generator, Shell::Bash) {
        let mut output = Vec::new();
        generate(generator, command, bin_name, &mut output);
        let normalized = normalize_bash_completion(
            String::from_utf8(output).expect("bash completion should be valid UTF-8"),
        );
        io::stdout()
            .write_all(normalized.as_bytes())
            .expect("failed to write bash completion");
        return;
    }

    generate(generator, command, bin_name, &mut io::stdout());
}

fn normalize_bash_completion(script: String) -> String {
    script.replace("__subcmd__", "__")
}