fix: improve error reporting when port is in use

Before this change, when we could not start listening on webserver's TCP port, the binary produced by GoReleaser would abort with no meaningful error report: ``` ❯ ./build/saturn/l2node-darwin-arm64/saturn-l2 [1] 16654 killed ./build/saturn/l2node-darwin-arm64/saturn-l2 ``` In this commit, I am reworking error handling to print the error to stderr and exit the process with a non-zero exit code via `os.Exit`. Signed-off-by: Miroslav Bajtoš <[email protected]>
filecoin-saturn · Jul 13, 2022 · bac721b · bac721b
1 parent 615060d
commit bac721b
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/main/main.go b/main/main.go
@@ -58,7 +58,8 @@ func main() {
 
 	nl, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
 	if err != nil {
-		panic(err)
+		fmt.Fprintf(os.Stderr, "Cannot start the webserver: %s\n", err.Error())
+		os.Exit(4)
 	}
 
 	go func() {