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use crate::recursive::{deserialize_line, serialize_line, DriverInfo};
use std::io::{self, BufReader, Write};
use std::net::TcpStream;
use std::process::{self, Command, Stdio};
use std::{env, mem};
/// 1. Sends [`DriverInfo`] to the [`crate::recursive::LintcheckServer`] running on `addr`
/// 2. Receives [bool] from the server, if `false` returns `None`
/// 3. Otherwise sends the stderr of running `clippy-driver` to the server
fn run_clippy(addr: &str) -> Option<i32> {
let driver_info = DriverInfo {
package_name: env::var("CARGO_PKG_NAME").ok()?,
crate_name: env::var("CARGO_CRATE_NAME").ok()?,
version: env::var("CARGO_PKG_VERSION").ok()?,
};
let mut stream = BufReader::new(TcpStream::connect(addr).unwrap());
serialize_line(&driver_info, stream.get_mut());
let should_run = deserialize_line::<bool, _>(&mut stream);
if !should_run {
return None;
}
// Remove --cap-lints allow so that clippy runs and lints are emitted
let mut include_next = true;
let args = env::args().skip(1).filter(|arg| match arg.as_str() {
"--cap-lints=allow" => false,
"--cap-lints" => {
include_next = false;
false
},
_ => mem::replace(&mut include_next, true),
});
let output = Command::new(env::var("CLIPPY_DRIVER").expect("missing env CLIPPY_DRIVER"))
.args(args)
.stdout(Stdio::inherit())
.output()
.expect("failed to run clippy-driver");
stream
.get_mut()
.write_all(&output.stderr)
.unwrap_or_else(|e| panic!("{e:?} in {driver_info:?}"));
match output.status.code() {
Some(0) => Some(0),
code => {
io::stderr().write_all(&output.stderr).unwrap();
Some(code.expect("killed by signal"))
},
}
}
pub fn drive(addr: &str) {
process::exit(run_clippy(addr).unwrap_or_else(|| {
Command::new("rustc")
.args(env::args_os().skip(2))
.status()
.unwrap()
.code()
.unwrap()
}))
}
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