clap-complete-command

Reduces boilerplate for adding a completion command to Clap

Examples

Derive

```rust use clap::{IntoApp, Parser, Subcommand};

[derive(Parser)]

struct Cli { #[clap(subcommand)] command: Commands, }

[derive(Subcommand)]

enum Commands { /// Generate shell completions Completion { /// The shell to generate the completions for #[clap(argenum)] shell: clapcomplete_command::Shell, }, }

fn main() { let cli = Cli::parse();

match cli.command {
    // e.g. `$ cli completion bash`
    Commands::Completion { shell } => {
        shell.generate(
            &mut Cli::command(),
            env!("CARGO_PKG_NAME"),
            &mut std::io::stdout(),
        );
    }
}

} ```

Builder

```rs use clap::{Arg, Command};

fn buildcli() -> Command<'static> { Command::new(env!("CARGOPKGNAME")).arg( Arg::new("completion") .help("Generate shell completions") .possiblevalues(clapcompletecommand::Shell::possible_values()), ) }

fn main() { let matches = buildcli().getmatches();

// e.g. `$ cli bash`
if let Ok(shell) = matches.value_of_t::<clap_complete_command::Shell>("completion") {
    let mut command = build_cli();
    shell.generate(&mut command, env!("CARGO_PKG_NAME"), &mut std::io::stdout());
}

} ```

Supported shells

The supported shells can be seen in clap_complete_command::Shell.