feat: stderr logging for lsp client

oal-client/src/bin/oal-lsp.rs

@@ -1,5 +1,6 @@
 use anyhow::anyhow;
 use crossbeam_channel::select;
+use log::info;
 use lsp_server::{Connection, Message, Notification};
 use lsp_types::notification::{
     DidChangeTextDocument, DidChangeWorkspaceFolders, DidCloseTextDocument, DidOpenTextDocument,
@@ -19,8 +20,15 @@ use std::collections::HashMap;
 use std::time::Duration;
 
 fn main() -> anyhow::Result<()> {
+    stderrlog::new()
+        .quiet(false)
+        .verbosity(log::Level::Info)
+        .timestamp(stderrlog::Timestamp::Second)
+        .init()
+        .unwrap();
+
     // Note that we must have our logging only write out to stderr.
-    eprintln!("starting Oxlip API Language server");
+    info!("starting Oxlip API Language server");
 
     // Create the transport. Includes the stdio (stdin and stdout) versions but this could
     // also be implemented to use sockets or HTTP.
@@ -84,7 +92,7 @@ fn main() -> anyhow::Result<()> {
     threads.join()?;
 
     // Shut down gracefully.
-    eprintln!("shutting down Oxlip API Language server");
+    info!("shutting down Oxlip API Language server");
     Ok(())
 }
 

oal-client/src/lsp/mod.rs

@@ -9,6 +9,7 @@ mod tests;
 use crate::config::Config;
 use crate::{DefaultFileSystem, FileSystem};
 use anyhow::anyhow;
+use log::debug;
 use lsp_types::{
     Diagnostic, DidChangeTextDocumentParams, DidCloseTextDocumentParams, DidOpenTextDocumentParams,
 };
@@ -68,6 +69,7 @@ impl Folder {
         self.mods = None;
         self.spec = None;
         if let Ok(main) = self.config.main() {
+            debug!("evaluating {}", main);
             if let Ok(mods) = ws.load(&main) {
                 self.spec = ws.eval(&mods).ok();
                 self.mods = Some(mods);