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//go:build !windows
// +build !windows
package gui
import (
"io"
"os/exec"
"strings"
"github.com/creack/pty"
"github.com/jesseduffield/gocui"
)
func (gui *Gui) desiredPtySize() *pty.Winsize {
width, height := gui.Views.Main.Size()
return &pty.Winsize{Cols: uint16(width), Rows: uint16(height)}
}
func (gui *Gui) onResize() error {
if gui.State.Ptmx == nil {
return nil
}
// TODO: handle resizing properly: we need to actually clear the main view
// and re-read the output from our pty. Or we could just re-run the original
// command from scratch
if err := pty.Setsize(gui.State.Ptmx, gui.desiredPtySize()); err != nil {
return err
}
return nil
}
// Some commands need to output for a terminal to active certain behaviour.
// For example, git won't invoke the GIT_PAGER env var unless it thinks it's
// talking to a terminal. We typically write cmd outputs straight to a view,
// which is just an io.Reader. the pty package lets us wrap a command in a
// pseudo-terminal meaning we'll get the behaviour we want from the underlying
// command.
func (gui *Gui) newPtyTask(view *gocui.View, cmd *exec.Cmd, prefix string) error {
width, _ := gui.Views.Main.Size()
pager := gui.GitCommand.GetPager(width)
if pager == "" {
// if we're not using a custom pager we don't need to use a pty
return gui.newCmdTask(view, cmd, prefix)
}
cmdStr := strings.Join(cmd.Args, " ")
cmd.Env = append(cmd.Env, "GIT_PAGER="+pager)
_, height := view.Size()
_, oy := view.Origin()
manager := gui.getManager(view)
start := func() (*exec.Cmd, io.Reader) {
ptmx, err := pty.StartWithSize(cmd, gui.desiredPtySize())
if err != nil {
gui.Log.Error(err)
}
gui.State.Ptmx = ptmx
return cmd, ptmx
}
onClose := func() {
gui.State.Ptmx.Close()
gui.State.Ptmx = nil
}
if err := manager.NewTask(manager.NewCmdTask(start, prefix, height+oy+10, onClose), cmdStr); err != nil {
return err
}
return nil
}
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