func formatFrame()

in lambda/panic.go [61:99]

• 20 lines of code
• 3 McCabe index (conditional complexity)

func formatFrame(inputFrame runtime.Frame) *messages.InvokeResponse_Error_StackFrame {
	path := inputFrame.File
	line := int32(inputFrame.Line)
	label := inputFrame.Function

	// Strip GOPATH from path by counting the number of seperators in label & path
	//
	// For example given this:
	//     GOPATH = /home/user
	//     path   = /home/user/src/pkg/sub/file.go
	//     label  = pkg/sub.Type.Method
	//
	// We want to set:
	//     path  = pkg/sub/file.go
	//     label = Type.Method

	i := len(path)
	for n, g := 0, strings.Count(label, "/")+2; n < g; n++ {
		i = strings.LastIndex(path[:i], "/")
		if i == -1 {
			// Something went wrong and path has less seperators than we expected
			// Abort and leave i as -1 to counteract the +1 below
			break
		}
	}

	path = path[i+1:] // Trim the initial /

	// Strip the path from the function name as it's already in the path
	label = label[strings.LastIndex(label, "/")+1:]
	// Likewise strip the package name
	label = label[strings.Index(label, ".")+1:]

	return &messages.InvokeResponse_Error_StackFrame{
		Path:  path,
		Line:  line,
		Label: label,
	}
}