Width incorrectly reported inside tmux

[vbauerster]

Given the code:

package main

import (
	"fmt"
	"time"

	"github.com/buger/goterm"
)

func main() {
	for {
		w := goterm.Width()
		fmt.Printf("\rwidth: %d", w)
		time.Sleep(100 * time.Millisecond)
	}
}

Width reported correctly without tmux:

Width reported incorrectly inside tmux:

[vbauerster]

Any idea how to fix under tmux?

[harmon25]

I added a w32 call that works to retrieve Windows console dimensions - won't help on tmux though...

[c032]

A veeery crude fix is checking whether the TMUX environment variable is set, and then parse the output of the command tmux display -p '#{pane_width} #{pane_height}'. I bet it can also be done by communicating with its socket, but couldn't find any documentation on that.

I'd like to know how WeeChat handles this.