tview provides the functions ANSIWriter() and TranslateANSI() which translate common ANSI escape sequences into color tags used by tview. This can be useful when you want to display colorized output from other programs in tview.

Here is an example that displays output from stdin:

package main

import (
	"io"
	"os"

	"github.com/rivo/tview"
)

func main() {
	app := tview.NewApplication()
	textView := tview.NewTextView().
		SetDynamicColors(true).
		SetChangedFunc(func() {
			app.Draw()
		})
	textView.SetBorder(true).SetTitle("Stdin")
	go func() {
		w := tview.ANSIWriter(textView)
		if _, err := io.Copy(w, os.Stdin); err != nil {
			panic(err)
		}
	}()
	if err := app.SetRoot(textView, true).Run(); err != nil {
		panic(err)
	}
}

When you run this program, you must pipe text into it. To illustrate the handling of ANSI escape sequences, you could do the following on Linux:

ls -l --color=always | go run main.go

Any colored text produced by the ls command will be displayed in the same color in tview.