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use serde_derive::Deserialize;
use crate::backends::{ Backend, RunError };
use std::process::{ Command };
use std::path::Path;
use crate::wait::{ wait_child, ChildExitStatus };
use crate::serde_duration::deserialize_duration;
use std::time::Duration;
#[derive(Debug, Deserialize, Default)]
pub struct PythonBackend {
template: Option<String>,
version: Option<String>,
#[serde(default = "default_timeout", deserialize_with = "deserialize_duration")]
timeout: Duration,
}
fn default_timeout() -> Duration {
Duration::from_secs(1)
}
impl PythonBackend {
fn get_interpreter(&self) -> String {
format!(
"python{}",
self.version
.as_ref()
.unwrap_or(&String::new())
)
}
}
impl Backend for PythonBackend {
fn get_template(&self) -> Option<&str> {
match self.template {
Some(ref t) => Some(t),
None => None
}
}
fn run(&self, fname: &Path) -> Result<ChildExitStatus, RunError> {
let timer = std::time::Instant::now();
let child = Command::new(self.get_interpreter())
.arg(fname.as_os_str())
.spawn()?;
Ok(wait_child(child, self.timeout, timer)?)
}
}
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