❤️ awesome and unique features for end-developers are coming...

total refactor of the hero and mvc packages, see README#Next (it's not completed yet)


Former-commit-id: b85ae99cbfe5965ba919c1e15cf4989e787982c0

hero/dependency_source.go

@@ -0,0 +1,89 @@
+package hero
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"reflect"
+	"runtime"
+	"strings"
+)
+
+type Source struct {
+	File   string
+	Line   int
+	Caller string
+}
+
+func newSource(fn reflect.Value) Source {
+	var (
+		callerFileName   string
+		callerLineNumber int
+		callerName       string
+	)
+
+	switch fn.Kind() {
+	case reflect.Func, reflect.Chan, reflect.Map, reflect.Ptr, reflect.UnsafePointer, reflect.Slice:
+		pc := fn.Pointer()
+		fpc := runtime.FuncForPC(pc)
+		if fpc != nil {
+			callerFileName, callerLineNumber = fpc.FileLine(pc)
+			callerName = fpc.Name()
+		}
+
+		fallthrough
+	default:
+		if callerFileName == "" {
+			callerFileName, callerLineNumber = getCaller()
+		}
+	}
+
+	wd, _ := os.Getwd()
+	if relFile, err := filepath.Rel(wd, callerFileName); err == nil {
+		callerFileName = "./" + relFile
+	}
+
+	return Source{
+		File:   callerFileName,
+		Line:   callerLineNumber,
+		Caller: callerName,
+	}
+}
+
+func getSource() Source {
+	filename, line := getCaller()
+	return Source{
+		File: filename,
+		Line: line,
+	}
+}
+
+func (s Source) String() string {
+	return fmt.Sprintf("%s:%d", s.File, s.Line)
+}
+
+// https://golang.org/doc/go1.9#callersframes
+func getCaller() (string, int) {
+	var pcs [32]uintptr
+	n := runtime.Callers(4, pcs[:])
+	frames := runtime.CallersFrames(pcs[:n])
+
+	for {
+		frame, more := frames.Next()
+		file := frame.File
+
+		if strings.HasSuffix(file, "_test.go") {
+			return file, frame.Line
+		}
+
+		if !strings.Contains(file, "/kataras/iris") || strings.Contains(file, "/kataras/iris/_examples") || strings.Contains(file, "iris-contrib/examples") {
+			return file, frame.Line
+		}
+
+		if !more {
+			break
+		}
+	}
+
+	return "???", 0
+}