Don't panic when we try to register 2 global loggers (#3840)

bkchr · rphmeier · commit d0e68bf17e84 · 2019-10-17T17:35:41.000-04:00
diff --git a/core/cli/src/lib.rs b/core/cli/src/lib.rs
@@ -919,7 +919,9 @@ fn init_logger(pattern: &str) {
 		writeln!(buf, "{}", output)
 	});
 
-	builder.init();
+	if builder.try_init().is_err() {
+		info!("Not registering Substrate logger, as there is already a global logger registered!");
+	}
 }
 
 fn kill_color(s: &str) -> String {

Original file line number	Diff line number	Diff line change
`@@ -919,7 +919,9 @@ fn init_logger(pattern: &str) {`
`919`	`919`	`writeln!(buf, "{}", output)`
`920`	`920`	`});`
`921`	`921`
`922`		`- builder.init();`
	`922`	`+ if builder.try_init().is_err() {`
	`923`	`+ info!("Not registering Substrate logger, as there is already a global logger registered!");`
	`924`	`+ }`
`923`	`925`	`}`
`924`	`926`
`925`	`927`	`fn kill_color(s: &str) -> String {`