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