feat(xtrellis): add utils.DebugLog

cmd/xtrellis/utils/utils.go

@@ -0,0 +1,32 @@
+package utils
+
+import (
+	"fmt"
+	"log"
+	"regexp"
+	"runtime"
+)
+
+var debugLogEnabled = false
+
+func SetDebugLogEnabled(enabled bool) {
+	debugLogEnabled = enabled
+}
+
+func DebugLog(format string, args ...interface{}) {
+	if !debugLogEnabled {
+		return
+	}
+
+	// get the calling function's name, filename, and line number
+	pc, filename, line, _ := runtime.Caller(1)
+	funcname := runtime.FuncForPC(pc).Name()
+
+	// remove project root to shorten file path
+	re := regexp.MustCompile("(.*)/trellis/")
+	path := re.ReplaceAllString(filename, "")
+
+	s1 := fmt.Sprintf("🔷 %s:%s:%d", path, funcname, line)
+	s2 := fmt.Sprintf(format, args...)
+	log.Printf("%s %s", s1, s2)
+}