Cargo command to work with Nintendo 3DS project binaries.
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use clap::{Args, Parser, Subcommand};
#[derive(Parser, Debug)]
#[command(name = "cargo", bin_name = "cargo")]
pub enum Cargo {
#[command(name = "3ds")]
Input(Input),
}
#[derive(Args, Debug)]
#[command(version, about)]
pub struct Input {
#[command(subcommand)]
pub cmd: CargoCmd,
}
/// The cargo command to run. This command will be forwarded to the real
/// `cargo` with the appropriate arguments for a 3DS executable.
///
/// If another command is passed which is not recognized, it will be passed
/// through unmodified to `cargo` with RUSTFLAGS set for the 3DS.
#[derive(Subcommand, Debug)]
#[command(allow_external_subcommands = true)]
pub enum CargoCmd {
/// Builds an executable suitable to run on a 3DS (3dsx).
Build(CargoArgs),
/// Builds an executable and sends it to a device with `3dslink`.
Run(Run),
/// Builds a test executable and sends it to a device with `3dslink`.
///
/// This can be used with `--test` for integration tests, or `--lib` for
/// unit tests (which require a custom test runner).
Test(Test),
// NOTE: it seems docstring + name for external subcommands are not rendered
// in help, but we might as well set them here in case a future version of clap
// does include them in help text.
/// Run any other `cargo` command with RUSTFLAGS set for the 3DS.
#[command(external_subcommand, name = "COMMAND")]
Passthrough(Vec<String>),
}
#[derive(Args, Debug)]
pub struct CargoArgs {
/// Pass additional options through to the `cargo` command.
///
/// To pass flags that start with `-`, you must use `--` to separate `cargo 3ds`
/// options from cargo options. Any argument after `--` will be passed through
/// to cargo unmodified.
///
/// If one of the arguments is itself `--`, the args following that will be
/// considered as args to pass to the executable, rather than to `cargo`
/// (only works for the `run` or `test` commands). For example, if you want
/// to pass some args to the executable directly it might look like this:
///
/// > cargo 3ds run -- -- arg1 arg2
#[arg(trailing_var_arg = true)]
#[arg(allow_hyphen_values = true)]
#[arg(global = true)]
#[arg(name = "CARGO_ARGS")]
args: Vec<String>,
}
#[derive(Parser, Debug)]
pub struct Test {
/// If set, the built executable will not be sent to the device to run it.
#[arg(long)]
pub no_run: bool,
// The test command uses a superset of the same arguments as Run.
#[command(flatten)]
pub run_args: Run,
}
#[derive(Parser, Debug)]
pub struct Run {
/// Specify the IP address of the device to send the executable to.
///
/// Corresponds to 3dslink's `--address` arg, which defaults to automatically
/// finding the device.
#[arg(long, short = 'a')]
pub address: Option<std::net::Ipv4Addr>,
/// Set the 0th argument of the executable when running it. Corresponds to
/// 3dslink's `--argv0` argument.
#[arg(long, short = '0')]
pub argv0: Option<String>,
/// Start the 3dslink server after sending the executable. Corresponds to
/// 3dslink's `--server` argument.
#[arg(long, short = 's', default_value_t = false)]
pub server: bool,
/// Set the number of tries when connecting to the device to send the executable.
/// Corresponds to 3dslink's `--retries` argument.
// Can't use `short = 'r'` because that would conflict with cargo's `--release/-r`
#[arg(long)]
pub retries: Option<usize>,
// Passthrough cargo options.
#[command(flatten)]
pub cargo_args: CargoArgs,
}
impl CargoArgs {
/// Get the args to be passed to the executable itself (not `cargo`).
pub fn cargo_opts(&self) -> &[String] {
self.split_args().0
}
/// Get the args to be passed to the executable itself (not `cargo`).
pub fn exe_args(&self) -> &[String] {
self.split_args().1
}
fn split_args(&self) -> (&[String], &[String]) {
if let Some(split) = self
.args
.iter()
.position(|s| s == "--" || !s.starts_with('-'))
{
let split = if self.args[split] == "--" {
split + 1
} else {
split
};
self.args.split_at(split)
} else {
(&self.args[..], &[])
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use clap::CommandFactory;
#[test]
fn verify_app() {
Cargo::command().debug_assert();
}
}