jj/cli/examples/custom-global-flag/main.rs
Yuya Nishihara 7a3e72415c cli: send status messages to stderr, specify stdout/stderr explicitly
Many of &mut UI can be changed to immutable borrows, but I'm not gonna
update them in this patch.
2023-10-11 19:24:01 +09:00

36 lines
1.1 KiB
Rust

// Copyright 2023 The Jujutsu Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::io::Write as _;
use jj_cli::cli_util::{CliRunner, CommandError};
use jj_cli::ui::Ui;
#[derive(clap::Args, Clone, Debug)]
struct CustomGlobalArgs {
/// Show a greeting before each command
#[arg(long, global = true)]
greet: bool,
}
fn process_before(ui: &mut Ui, custom_global_args: CustomGlobalArgs) -> Result<(), CommandError> {
if custom_global_args.greet {
writeln!(ui.stdout(), "Hello!")?;
}
Ok(())
}
fn main() -> std::process::ExitCode {
CliRunner::init().add_global_args(process_before).run()
}