feat: disable ansi if stdout is not terminal

src/logging/tracing.rs

@@ -1,5 +1,7 @@
 //! Logging facilities with tracing
 
+use std::io::IsTerminal;
+
 use time::UtcOffset;
 use tracing::level_filters::LevelFilter;
 use tracing_subscriber::{fmt::time::OffsetTime, EnvFilter, FmtSubscriber};
@@ -21,6 +23,13 @@ pub fn init_with_config(bin_name: &str, config: &LogConfig) {
             }
         });
 
+    // NOTE: ansi is enabled by default.
+    // Could be disabled by `NO_COLOR` environment variable.
+    // https://no-color.org/
+    if !std::io::stdout().is_terminal() {
+        builder = builder.with_ansi(false);
+    }
+
     if debug_level >= 1 {
         builder = builder.with_target(true).with_thread_ids(true).with_thread_names(true);