tests: add basic build progress test

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

vendor/github.com/creack/pty/run.go

@@ -0,0 +1,57 @@
+package pty
+
+import (
+	"os"
+	"os/exec"
+	"syscall"
+)
+
+// Start assigns a pseudo-terminal tty os.File to c.Stdin, c.Stdout,
+// and c.Stderr, calls c.Start, and returns the File of the tty's
+// corresponding pty.
+//
+// Starts the process in a new session and sets the controlling terminal.
+func Start(cmd *exec.Cmd) (*os.File, error) {
+	return StartWithSize(cmd, nil)
+}
+
+// StartWithAttrs assigns a pseudo-terminal tty os.File to c.Stdin, c.Stdout,
+// and c.Stderr, calls c.Start, and returns the File of the tty's
+// corresponding pty.
+//
+// This will resize the pty to the specified size before starting the command if a size is provided.
+// The `attrs` parameter overrides the one set in c.SysProcAttr.
+//
+// This should generally not be needed. Used in some edge cases where it is needed to create a pty
+// without a controlling terminal.
+func StartWithAttrs(c *exec.Cmd, sz *Winsize, attrs *syscall.SysProcAttr) (*os.File, error) {
+	pty, tty, err := Open()
+	if err != nil {
+		return nil, err
+	}
+	defer func() { _ = tty.Close() }() // Best effort.
+
+	if sz != nil {
+		if err := Setsize(pty, sz); err != nil {
+			_ = pty.Close() // Best effort.
+			return nil, err
+		}
+	}
+	if c.Stdout == nil {
+		c.Stdout = tty
+	}
+	if c.Stderr == nil {
+		c.Stderr = tty
+	}
+	if c.Stdin == nil {
+		c.Stdin = tty
+	}
+
+	c.SysProcAttr = attrs
+
+	if err := c.Start(); err != nil {
+		_ = pty.Close() // Best effort.
+		return nil, err
+	}
+	return pty, err
+}