first version

logger.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+var (
+	silentMode  bool
+	verboseMode bool
+)
+
+const (
+	colorRed   = "\x1b[31m"
+	colorReset = "\x1b[0m"
+)
+
+type logger struct{}
+
+func (logger) Info(args ...any) {
+	if silentMode {
+		return
+	}
+	fmt.Fprintln(os.Stdout, args...)
+}
+
+func (logger) Debug(args ...any) {
+	if silentMode || !verboseMode {
+		return
+	}
+	fmt.Fprintln(os.Stdout, args...)
+}
+
+func (logger) Println(args ...any) {
+	if silentMode {
+		return
+	}
+	fmt.Fprintln(os.Stdout, args...)
+}
+
+func (logger) Error(args ...any) {
+	fmt.Fprint(os.Stderr, colorRed)
+	fmt.Fprintln(os.Stderr, args...)
+	fmt.Fprint(os.Stderr, colorReset)
+}
+
+func (logger) Fatalln(args ...any) {
+	log.Error(args...)
+	os.Exit(1)
+}
+
+var log = logger{}