add release_log_level feature to simulate release logs in debug mode.

Signed-off-by: Jason Volk <jason@zemos.net>

Cargo.toml

@@ -377,6 +377,9 @@ hot_reload = ["dep:hot-lib-reloader"]
 
 hardened_malloc = ["hardened_malloc-rs"]
 
+# developer feature useful only in debug builds.
+release_log_level = []
+
 # client/server interopability hacks
 #
 ## element has various non-spec compliant behaviour

src/utils/debug.rs

 /// Log event at given level in debug-mode (when debug-assertions are enabled).
-/// In release mode it becomes DEBUG level, and possibly subject to elision.
+/// In release-mode it becomes DEBUG level, and possibly subject to elision.
+///
+/// Release-mode can be simulated in debug-mode builds by enabling the feature
+/// 'release_log_level'.
 #[macro_export]
 macro_rules! debug_event {
 	( $level:expr, $($x:tt)+ ) => {
-		if cfg!(debug_assertions) {
+		if cfg!(debug_assertions) && cfg!(not(feature = "release_log_level")) {
 			tracing::event!( $level, $($x)+ );
 		} else {
 			tracing::debug!( $($x)+ );
@@ -12,7 +15,7 @@ macro_rules! debug_event {
 }
 
 /// Log message at the ERROR level in debug-mode (when debug-assertions are
-/// enabled). In release mode it becomes DEBUG level, and possibly subject to
+/// enabled). In release-mode it becomes DEBUG level, and possibly subject to
 /// elision.
 #[macro_export]
 macro_rules! debug_error {
@@ -22,7 +25,7 @@ macro_rules! debug_error {
 }
 
 /// Log message at the WARN level in debug-mode (when debug-assertions are
-/// enabled). In release mode it becomes DEBUG level, and possibly subject to
+/// enabled). In release-mode it becomes DEBUG level, and possibly subject to
 /// elision.
 #[macro_export]
 macro_rules! debug_warn {
@@ -32,7 +35,7 @@ macro_rules! debug_warn {
 }
 
 /// Log message at the INFO level in debug-mode (when debug-assertions are
-/// enabled). In release mode it becomes DEBUG level, and possibly subject to
+/// enabled). In release-mode it becomes DEBUG level, and possibly subject to
 /// elision.
 #[macro_export]
 macro_rules! debug_info {