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https://github.com/cloud-hypervisor/cloud-hypervisor.git
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0310c5726f
cloud-hypervisor, ch-remote, vhost-user-block and vhost-user-net all need at least one argument to do anything useful, so printing command help is helpful when they are run without arguments or a subcommand. Use clap::Command::arg_required_else_help(true) to do this. Signed-off-by: Chris Webb <chris@arachsys.com>
36 lines
1.1 KiB
Rust
36 lines
1.1 KiB
Rust
// Copyright 2019 Red Hat, Inc. All Rights Reserved.
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//
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// Portions Copyright 2019 Intel Corporation. All Rights Reserved.
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//
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// Portions Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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//
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// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
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//
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// SPDX-License-Identifier: (Apache-2.0 AND BSD-3-Clause)
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extern crate vhost_user_block;
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use clap::{Arg, Command};
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use vhost_user_block::start_block_backend;
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fn main() {
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env_logger::init();
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let cmd_arguments = Command::new("vhost-user-blk backend")
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.version(env!("CARGO_PKG_VERSION"))
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.author(env!("CARGO_PKG_AUTHORS"))
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.about("Launch a vhost-user-blk backend.")
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.arg_required_else_help(true)
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.arg(
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Arg::new("block-backend")
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.long("block-backend")
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.help(vhost_user_block::SYNTAX)
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.num_args(1)
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.required(true),
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)
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.get_matches();
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let backend_command = cmd_arguments.get_one::<String>("block-backend").unwrap();
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start_block_backend(backend_command);
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}
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