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use runestick::{Bytes, Shared, Value, ValueError, ValueErrorKind};
use std::fmt;
use std::io;
use tokio::process;
pub fn module() -> Result<runestick::Module, runestick::ContextError> {
let mut module = runestick::Module::new(&["process"]);
module.ty(&["Command"]).build::<Command>()?;
module.ty(&["Child"]).build::<Child>()?;
module.ty(&["ExitStatus"]).build::<ExitStatus>()?;
module.ty(&["Output"]).build::<Output>()?;
module.function(&["Command", "new"], Command::new)?;
module.inst_fn("spawn", Command::spawn)?;
module.inst_fn("arg", Command::arg)?;
module.inst_fn("args", Command::args)?;
module.inst_fn(runestick::INTO_FUTURE, Child::into_future)?;
module.async_inst_fn("wait_with_output", Child::wait_with_output)?;
module.inst_fn(runestick::STRING_DISPLAY, ExitStatus::display)?;
module.getter("status", Output::status)?;
module.getter("stdout", Output::stdout)?;
module.getter("stderr", Output::stderr)?;
Ok(module)
}
struct Command {
inner: process::Command,
}
impl Command {
fn new(command: &str) -> Self {
Self {
inner: process::Command::new(command),
}
}
fn args(&mut self, args: &[Value]) -> Result<(), ValueError> {
for arg in args {
match arg {
Value::String(s) => {
self.inner.arg(&*s.borrow_ref()?);
}
Value::StaticString(s) => {
self.inner.arg(&***s);
}
actual => {
return Err(ValueError::from(ValueErrorKind::ExpectedString {
actual: actual.type_info()?,
}))
}
}
}
Ok(())
}
fn arg(&mut self, arg: &str) {
self.inner.arg(arg);
}
fn spawn(mut self) -> io::Result<Child> {
Ok(Child {
inner: self.inner.spawn()?,
})
}
}
struct Child {
inner: process::Child,
}
impl Child {
fn into_future(self) -> runestick::Future {
runestick::Future::new(async move {
let status = match self.inner.await {
Ok(status) => status,
Err(error) => return Ok(Err(error)),
};
Ok(Ok(ExitStatus { status }))
})
}
async fn wait_with_output(self) -> io::Result<Output> {
let inner = self.inner.wait_with_output().await?;
Ok(Output {
status: inner.status,
stdout: Shared::new(Bytes::from_vec(inner.stdout)),
stderr: Shared::new(Bytes::from_vec(inner.stderr)),
})
}
}
struct Output {
status: std::process::ExitStatus,
stdout: Shared<Bytes>,
stderr: Shared<Bytes>,
}
impl Output {
fn status(&self) -> ExitStatus {
ExitStatus {
status: self.status,
}
}
fn stdout(&mut self) -> Shared<Bytes> {
self.stdout.clone()
}
fn stderr(&mut self) -> Shared<Bytes> {
self.stderr.clone()
}
}
struct ExitStatus {
status: std::process::ExitStatus,
}
impl ExitStatus {
fn display(&self, buf: &mut String) -> fmt::Result {
use std::fmt::Write as _;
write!(buf, "{}", self.status)
}
}
runestick::decl_external!(Command);
runestick::decl_external!(Child);
runestick::decl_external!(ExitStatus);
runestick::decl_external!(Output);