Eliminate global logger calls

Author: nugget

.golangci.yml

@@ -209,7 +209,7 @@ linters-settings:
     # - "default": report only the default slog logger
     # https://github.com/go-simpler/sloglint?tab=readme-ov-file#no-global
     # Default: ""
-    no-global: ""
+    no-global: "all"
     # Enforce using methods that accept a context.
     # Values:
     # - "": disabled

examples/vehiclestats/vehiclestats.go

@@ -19,7 +19,7 @@ func main() {
 	flag.Parse()
 
 	if *filename == "" {
-		slog.Error("no filename provided (--file)")
+		logger.Error("no filename provided (--file)")
 		os.Exit(1)
 	}
 
@@ -36,7 +36,7 @@ func main() {
 	// Create a [roadtrip.Vehicle] object with contents from a Road Trip data file.
 	vehicle, err := roadtrip.NewVehicleFromFile(*filename, options)
 	if err != nil {
-		slog.Error("unable to load Road Trip data file",
+		logger.Error("unable to load Road Trip data file",
 			"error", err,
 		)
 		os.Exit(1)