build.rs

// This file is part of Substrate.

// Copyright (C) 2017-2022 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

fn main() {
    #[cfg(feature = "cli")]
    cli::main();
}

#[cfg(feature = "cli")]
mod cli {
    include!("src/cli.rs");

    use clap::{CommandFactory, ValueEnum};
    use clap_complete::{generate_to, Shell};
    use std::{env, fs, path::Path};
    use substrate_build_script_utils::{generate_cargo_keys, rerun_if_git_head_changed};

    pub fn main() {
        build_shell_completion();
        generate_cargo_keys();

        rerun_if_git_head_changed();
    }

    /// Build shell completion scripts for all known shells
    fn build_shell_completion() {
        for shell in Shell::value_variants() {
            build_completion(shell);
        }
    }

    /// Build the shell auto-completion for a given Shell
    fn build_completion(shell: &Shell) {
        let outdir = match env::var_os("OUT_DIR") {
            None => return,
            Some(dir) => dir,
        };
        let path = Path::new(&outdir)
            .parent()
            .unwrap()
            .parent()
            .unwrap()
            .parent()
            .unwrap()
            .join("completion-scripts");

        fs::create_dir(&path).ok();

        let _ = generate_to(*shell, &mut Cli::command(), "joystream-node", &path);
    }
}