1 files changed, 49 insertions, 0 deletions
diff --git a/cli/lsp/logging.rs b/cli/lsp/logging.rs
new file mode 100644
index 000000000..0bfc2fbc8
--- /dev/null
+++ b/cli/lsp/logging.rs
@@ -0,0 +1,49 @@
+// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+
+use std::sync::atomic::AtomicBool;
+use std::sync::atomic::AtomicUsize;
+use std::sync::atomic::Ordering;
+
+static LSP_DEBUG_FLAG: AtomicBool = AtomicBool::new(false);
+static LSP_LOG_LEVEL: AtomicUsize = AtomicUsize::new(log::Level::Info as usize);
+
+pub fn set_lsp_debug_flag(value: bool) {
+  LSP_DEBUG_FLAG.store(value, Ordering::SeqCst)
+}
+
+pub fn lsp_debug_enabled() -> bool {
+  LSP_DEBUG_FLAG.load(Ordering::SeqCst)
+}
+
+pub fn set_lsp_log_level(level: log::Level) {
+  LSP_LOG_LEVEL.store(level as usize, Ordering::SeqCst)
+}
+
+pub fn lsp_log_level() -> log::Level {
+  let level = LSP_LOG_LEVEL.load(Ordering::SeqCst);
+  unsafe { std::mem::transmute(level) }
+}
+
+/// Use this macro to do "info" logs in the lsp code. This allows
+/// for downgrading these logs to another log level in the REPL.
+macro_rules! lsp_log {
+  ($($arg:tt)+) => (
+    let lsp_log_level = crate::lsp::logging::lsp_log_level();
+    if lsp_log_level == log::Level::Debug {
+      crate::lsp::logging::lsp_debug!($($arg)+)
+    } else {
+      log::log!(lsp_log_level, $($arg)+)
+    }
+  )
+}
+
+macro_rules! lsp_debug {
+  ($($arg:tt)+) => (
+    if crate::lsp::logging::lsp_debug_enabled() {
+      log::debug!($($arg)+)
+    }
+  )
+}
+
+pub(super) use lsp_debug;
+pub(super) use lsp_log;