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use serde::Deserialize;
use std::fmt::{self, Display, Formatter};
use std::fs::remove_file;
use std::path::PathBuf;
use std::process::{self, Command, Output};
const RUSTC_COLOR_ARGS: &[&str] = &["--color", "always"];
fn temp_file() -> String {
format!("./temp_{}", process::id())
}
#[derive(Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum Mode {
Compile,
Test,
}
#[derive(Deserialize)]
pub struct ExerciseList {
pub exercises: Vec<Exercise>,
}
#[derive(Deserialize)]
pub struct Exercise {
pub name: String,
pub path: PathBuf,
pub mode: Mode,
pub hint: String,
}
impl Exercise {
pub fn compile(&self) -> Output {
match self.mode {
Mode::Compile => Command::new("rustc")
.args(&[self.path.to_str().unwrap(), "-o", &temp_file()])
.args(RUSTC_COLOR_ARGS)
.output(),
Mode::Test => Command::new("rustc")
.args(&["--test", self.path.to_str().unwrap(), "-o", &temp_file()])
.args(RUSTC_COLOR_ARGS)
.output(),
}
.expect("Failed to run 'compile' command.")
}
pub fn run(&self) -> Output {
Command::new(&temp_file())
.output()
.expect("Failed to run 'run' command")
}
pub fn clean(&self) {
let _ignored = remove_file(&temp_file());
}
}
impl Display for Exercise {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(f, "{}", self.path.to_str().unwrap())
}
}
#[cfg(test)]
mod test {
use super::*;
use std::fs::File;
use std::path::Path;
#[test]
fn test_clean() {
File::create(&temp_file()).unwrap();
let exercise = Exercise {
name: String::from("example"),
path: PathBuf::from("example.rs"),
mode: Mode::Test,
hint: String::from(""),
};
exercise.clean();
assert!(!Path::new(&temp_file()).exists());
}
}
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