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//! A standalone binary for `proc-macro-srv`.
//! Driver for proc macro server
use std::io;
fn main() -> std::io::Result<()> {
let v = std::env::var("RUST_ANALYZER_INTERNALS_DO_NOT_USE");
match v.as_deref() {
Ok("this is unstable") => {
// very well, if you must
}
_ => {
eprintln!("If you're rust-analyzer, you can use this tool by exporting RUST_ANALYZER_INTERNALS_DO_NOT_USE='this is unstable'.");
eprintln!("If not, you probably shouldn't use this tool. But do what you want: I'm an error message, not a cop.");
std::process::exit(122);
}
}
run()
}
#[cfg(not(any(feature = "sysroot-abi", rust_analyzer)))]
fn run() -> io::Result<()> {
panic!("proc-macro-srv-cli requires the `sysroot-abi` feature to be enabled");
}
#[cfg(any(feature = "sysroot-abi", rust_analyzer))]
fn run() -> io::Result<()> {
use proc_macro_api::msg::{self, Message};
let read_request = |buf: &mut String| msg::Request::read(&mut io::stdin().lock(), buf);
let write_response = |msg: msg::Response| msg.write(&mut io::stdout().lock());
let mut srv = proc_macro_srv::ProcMacroSrv::default();
let mut buf = String::new();
while let Some(req) = read_request(&mut buf)? {
let res = match req {
msg::Request::ListMacros { dylib_path } => {
msg::Response::ListMacros(srv.list_macros(&dylib_path))
}
msg::Request::ExpandMacro(task) => msg::Response::ExpandMacro(srv.expand(task)),
msg::Request::ApiVersionCheck {} => {
msg::Response::ApiVersionCheck(proc_macro_api::msg::CURRENT_API_VERSION)
}
};
write_response(res)?
}
Ok(())
}
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