feat: support enabling pretty log via env var

src/utils/runtime/src/logger.rs

@@ -18,6 +18,7 @@ use std::path::PathBuf;
 use either::Either;
 use risingwave_common::metrics::MetricsLayer;
 use risingwave_common::util::deployment::Deployment;
+use risingwave_common::util::env_var::env_var_is_true;
 use risingwave_common::util::query_log::*;
 use risingwave_common::util::tracing::layer::set_toggle_otel_layer_fn;
 use thiserror_ext::AsReport;
@@ -170,6 +171,17 @@ fn disabled_filter() -> filter::Targets {
 ///
 /// `RW_QUERY_LOG_TRUNCATE_LEN` configures the max length of the SQLs logged in the query log,
 /// to avoid the log file growing too large. The default value is 1024 in production.
+///
+/// ### `RW_ENABLE_PRETTY_LOG`
+///
+/// If it is set to `true`, enable pretty log output, which contains line numbers and prints spans in multiple lines.
+/// This can be helpful for development and debugging.
+///
+/// Hint: Also turn off other uninteresting logs to make the most of the pretty log.
+/// e.g.,
+/// ```bash
+/// RUST_LOG="risingwave_storage::hummock::event_handler=off,batch_execute=off,risingwave_batch::task=off" RW_ENABLE_PRETTY_LOG=true risedev d
+/// ```
 pub fn init_risingwave_logger(settings: LoggerSettings) {
     let deployment = Deployment::current();
 
@@ -276,7 +288,13 @@ pub fn init_risingwave_logger(settings: LoggerSettings) {
                 .json()
                 .map_event_format(|e| e.with_current_span(false)) // avoid duplication as there's a span list field
                 .boxed(),
-            Deployment::Other => fmt_layer.boxed(),
+            Deployment::Other => {
+                if env_var_is_true("RW_ENABLE_PRETTY_LOG") {
+                    fmt_layer.pretty().boxed()
+                } else {
+                    fmt_layer.boxed()
+                }
+            }
         };
 
         layers.push(