如何在终端中“擦除回滚（又名“保存的行”）”

Question

How can I erase the scroll-back in a terminal using Go?

In OS X using Terminal, I can run:

$ print '\e[3J'

and it will "Erase the scroll-back (aka 'Saved Lines')." Great!

But, in Go, when I run:

exec.Command("print", `\e[3J`).CombinedOutput() 

I get the error that exec: "print": executable file not found in $PATH, which makes sense:

$ type -a print
print is a shell builtin

The helpful Gophers in Slack mentioned I should look into communicating the the terminal app directly (whether it be Terminal, iTerm, iTerm2, etc.). However, I'm at a loss even after looking at this: https://www.iterm2.com/documentation-scripting.html

Answer 1

fmt.Printf(string([]byte{0x1b,'[', '3', 'J'}))

should suffice. But you really should use a terminal library, which knows which codes to use depending on the terminal emulator in use.

Something like termbox-go.

For the usually available codes and their byte values, you can try xterm-docu but your mileage may vary, as you use different terminal emulators.