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-rw-r--r--crates/proc_macro_api/src/msg.rs35
-rw-r--r--crates/proc_macro_api/src/process.rs7
2 files changed, 30 insertions, 12 deletions
diff --git a/crates/proc_macro_api/src/msg.rs b/crates/proc_macro_api/src/msg.rs
index 970f165ed..f525df152 100644
--- a/crates/proc_macro_api/src/msg.rs
+++ b/crates/proc_macro_api/src/msg.rs
@@ -55,8 +55,8 @@ pub enum ErrorCode {
55} 55}
56 56
57pub trait Message: Serialize + DeserializeOwned { 57pub trait Message: Serialize + DeserializeOwned {
58 fn read(inp: &mut impl BufRead) -> io::Result<Option<Self>> { 58 fn read(inp: &mut impl BufRead, buf: &mut String) -> io::Result<Option<Self>> {
59 Ok(match read_json(inp)? { 59 Ok(match read_json(inp, buf)? {
60 None => None, 60 None => None,
61 Some(text) => { 61 Some(text) => {
62 let mut deserializer = serde_json::Deserializer::from_str(&text); 62 let mut deserializer = serde_json::Deserializer::from_str(&text);
@@ -76,14 +76,29 @@ pub trait Message: Serialize + DeserializeOwned {
76impl Message for Request {} 76impl Message for Request {}
77impl Message for Response {} 77impl Message for Response {}
78 78
79fn read_json(inp: &mut impl BufRead) -> io::Result<Option<String>> { 79fn read_json<'a>(
80 let mut buf = String::new(); 80 inp: &mut impl BufRead,
81 inp.read_line(&mut buf)?; 81 mut buf: &'a mut String,
82 buf.pop(); // Remove trailing '\n' 82) -> io::Result<Option<&'a String>> {
83 Ok(match buf.len() { 83 loop {
84 0 => None, 84 buf.clear();
85 _ => Some(buf), 85
86 }) 86 inp.read_line(&mut buf)?;
87 buf.pop(); // Remove trailing '\n'
88
89 if buf.is_empty() {
90 return Ok(None);
91 }
92
93 // Some ill behaved macro try to use stdout for debugging
94 // We ignore it here
95 if !buf.starts_with("{") {
96 log::error!("proc-macro tried to print : {}", buf);
97 continue;
98 }
99
100 return Ok(Some(buf));
101 }
87} 102}
88 103
89fn write_json(out: &mut impl Write, msg: &str) -> io::Result<()> { 104fn write_json(out: &mut impl Write, msg: &str) -> io::Result<()> {
diff --git a/crates/proc_macro_api/src/process.rs b/crates/proc_macro_api/src/process.rs
index 30bb1b687..99d05aef3 100644
--- a/crates/proc_macro_api/src/process.rs
+++ b/crates/proc_macro_api/src/process.rs
@@ -90,8 +90,10 @@ impl ProcMacroProcessSrv {
90fn client_loop(task_rx: Receiver<Task>, mut process: Process) { 90fn client_loop(task_rx: Receiver<Task>, mut process: Process) {
91 let (mut stdin, mut stdout) = process.stdio().expect("couldn't access child stdio"); 91 let (mut stdin, mut stdout) = process.stdio().expect("couldn't access child stdio");
92 92
93 let mut buf = String::new();
94
93 for Task { req, result_tx } in task_rx { 95 for Task { req, result_tx } in task_rx {
94 match send_request(&mut stdin, &mut stdout, req) { 96 match send_request(&mut stdin, &mut stdout, req, &mut buf) {
95 Ok(res) => result_tx.send(res).unwrap(), 97 Ok(res) => result_tx.send(res).unwrap(),
96 Err(err) => { 98 Err(err) => {
97 log::error!( 99 log::error!(
@@ -152,7 +154,8 @@ fn send_request(
152 mut writer: &mut impl Write, 154 mut writer: &mut impl Write,
153 mut reader: &mut impl BufRead, 155 mut reader: &mut impl BufRead,
154 req: Request, 156 req: Request,
157 buf: &mut String,
155) -> io::Result<Option<Response>> { 158) -> io::Result<Option<Response>> {
156 req.write(&mut writer)?; 159 req.write(&mut writer)?;
157 Response::read(&mut reader) 160 Response::read(&mut reader, buf)
158} 161}