muesli/termenv

go get github.com/muesli/termenv

output := termenv.NewOutput(os.Stdout)

// Returns terminal's foreground color
color := output.ForegroundColor()

// Returns terminal's background color
color := output.BackgroundColor()

// Returns whether terminal uses a dark-ish background
darkTheme := output.HasDarkBackground()

output := termenv.NewOutput(os.Stdout, termenv.WithProfile(termenv.TrueColor))

s := output.String("Hello World")

// Supports hex values
// Will automatically degrade colors on terminals not supporting RGB
s.Foreground(output.Color("#abcdef"))
// but also supports ANSI colors (0-255)
s.Background(output.Color("69"))
// ...or the color.Color interface
s.Foreground(output.FromColor(color.RGBA{255, 128, 0, 255}))

// Combine fore- & background colors
s.Foreground(output.Color("#ffffff")).Background(output.Color("#0000ff"))

// Supports the fmt.Stringer interface
fmt.Println(s)

s := output.String("foobar")

// Text styles
s.Bold()
s.Faint()
s.Italic()
s.CrossOut()
s.Underline()
s.Overline()

// Reverse swaps current fore- & background colors
s.Reverse()

// Blinking text
s.Blink()

// Combine multiple options
s.Bold().Underline()

// load template helpers
f := output.TemplateFuncs()
tpl := template.New("tpl").Funcs(f)

// apply bold style in a template
bold := `{{ Bold "Hello World" }}`

// examples for colorized templates
col := `{{ Color "#ff0000" "#0000ff" "Red on Blue" }}`
fg := `{{ Foreground "#ff0000" "Red Foreground" }}`
bg := `{{ Background "#0000ff" "Blue Background" }}`

// wrap styles
wrap := `{{ Bold (Underline "Hello World") }}`

// parse and render
tpl, err = tpl.Parse(bold)

var buf bytes.Buffer
tpl.Execute(&buf, nil)
fmt.Println(&buf)

// Move the cursor to a given position
output.MoveCursor(row, column)

// Save the cursor position
output.SaveCursorPosition()

// Restore a saved cursor position
output.RestoreCursorPosition()

// Move the cursor up a given number of lines
output.CursorUp(n)

// Move the cursor down a given number of lines
output.CursorDown(n)

// Move the cursor up a given number of lines
output.CursorForward(n)

// Move the cursor backwards a given number of cells
output.CursorBack(n)

// Move the cursor down a given number of lines and place it at the beginning
// of the line
output.CursorNextLine(n)

// Move the cursor up a given number of lines and place it at the beginning of
// the line
output.CursorPrevLine(n)

// Reset the terminal to its default style, removing any active styles
output.Reset()

// RestoreScreen restores a previously saved screen state
output.RestoreScreen()

// SaveScreen saves the screen state
output.SaveScreen()

// Switch to the altscreen. The former view can be restored with ExitAltScreen()
output.AltScreen()

// Exit the altscreen and return to the former terminal view
output.ExitAltScreen()

// Clear the visible portion of the terminal
output.ClearScreen()

// Clear the current line
output.ClearLine()

// Clear a given number of lines
output.ClearLines(n)

// Set the scrolling region of the terminal
output.ChangeScrollingRegion(top, bottom)

// Insert the given number of lines at the top of the scrollable region, pushing
// lines below down
output.InsertLines(n)

// Delete the given number of lines, pulling any lines in the scrollable region
// below up
output.DeleteLines(n)

// SetWindowTitle sets the terminal window title
output.SetWindowTitle(title)

// SetForegroundColor sets the default foreground color
output.SetForegroundColor(color)

// SetBackgroundColor sets the default background color
output.SetBackgroundColor(color)

// SetCursorColor sets the cursor color
output.SetCursorColor(color)

// Hide the cursor
output.HideCursor()

// Show the cursor
output.ShowCursor()

// Copy to clipboard
output.Copy(message)

// Copy to primary clipboard (X11)
output.CopyPrimary(message)

// Trigger notification
output.Notify(title, body)

// Enable X10 mouse mode, only button press events are sent
output.EnableMousePress()

// Disable X10 mouse mode
output.DisableMousePress()

// Enable Mouse Tracking mode
output.EnableMouse()

// Disable Mouse Tracking mode
output.DisableMouse()

// Enable Hilite Mouse Tracking mode
output.EnableMouseHilite()

// Disable Hilite Mouse Tracking mode
output.DisableMouseHilite()

// Enable Cell Motion Mouse Tracking mode
output.EnableMouseCellMotion()

// Disable Cell Motion Mouse Tracking mode
output.DisableMouseCellMotion()

// Enable All Motion Mouse mode
output.EnableMouseAllMotion()

// Disable All Motion Mouse mode
output.DisableMouseAllMotion()

// Enables bracketed paste mode
termenv.EnableBracketedPaste()

// Disables bracketed paste mode
termenv.DisableBracketedPaste()

    restoreConsole, err := termenv.EnableVirtualTerminalProcessing(termenv.DefaultOutput())
    if err != nil {
        panic(err)
    }
    defer restoreConsole()