fix: grand ssh, provisioning, perms refactor

See coop-cloud/organising#280.
See coop-cloud/organising#273.

pkg/ssh/ssh.go

@@ -111,7 +111,7 @@ type sudoWriter struct {
 
 // Write satisfies the write interface for sudoWriter
 func (w *sudoWriter) Write(p []byte) (int, error) {
-	if string(p) == "sudo_password" {
+	if strings.Contains(string(p), "sudo_password") {
 		w.stdin.Write([]byte(w.pw + "\n"))
 		w.pw = ""
 		return len(p), nil
@@ -131,11 +131,9 @@ func RunSudoCmd(cmd, passwd string, cl *Client) error {
 	}
 	defer session.Close()
 
-	cmd = "sudo -p " + "sudo_password" + " -S " + cmd
+	sudoCmd := fmt.Sprintf("SSH_ASKPASS=/usr/bin/ssh-askpass; sudo -p sudo_password -S %s", cmd)
 
-	w := &sudoWriter{
-		pw: passwd,
-	}
+	w := &sudoWriter{pw: passwd}
 	w.stdin, err = session.StdinPipe()
 	if err != nil {
 		return err
@@ -144,79 +142,19 @@ func RunSudoCmd(cmd, passwd string, cl *Client) error {
 	session.Stdout = w
 	session.Stderr = w
 
-	done := make(chan struct{})
-	scanner := bufio.NewScanner(session.Stdin)
-
-	go func() {
-		for scanner.Scan() {
-			line := scanner.Text()
-			fmt.Println(line)
-		}
-		done <- struct{}{}
-	}()
-
-	if err := session.Start(cmd); err != nil {
-		return err
+	modes := ssh.TerminalModes{
+		ssh.ECHO:          0,
+		ssh.TTY_OP_ISPEED: 14400,
+		ssh.TTY_OP_OSPEED: 14400,
 	}
 
-	<-done
-
-	if err := session.Wait(); err != nil {
-		return err
-	}
-
-	return err
-}
-
-// Exec runs a command on a remote and streams output
-func Exec(cmd string, cl *Client) error {
-	session, err := cl.SSHClient.NewSession()
-	if err != nil {
-		return err
-	}
-	defer session.Close()
-
-	stdout, err := session.StdoutPipe()
+	err = session.RequestPty("xterm", 80, 40, modes)
 	if err != nil {
 		return err
 	}
 
-	stderr, err := session.StdoutPipe()
-	if err != nil {
-		return err
-	}
-
-	stdoutDone := make(chan struct{})
-	stdoutScanner := bufio.NewScanner(stdout)
-
-	go func() {
-		for stdoutScanner.Scan() {
-			line := stdoutScanner.Text()
-			fmt.Println(line)
-		}
-		stdoutDone <- struct{}{}
-	}()
-
-	stderrDone := make(chan struct{})
-	stderrScanner := bufio.NewScanner(stderr)
-
-	go func() {
-		for stderrScanner.Scan() {
-			line := stderrScanner.Text()
-			fmt.Println(line)
-		}
-		stderrDone <- struct{}{}
-	}()
-
-	if err := session.Start(cmd); err != nil {
-		return err
-	}
-
-	<-stdoutDone
-	<-stderrDone
-
-	if err := session.Wait(); err != nil {
-		return err
+	if err := session.Run(sudoCmd); err != nil {
+		return fmt.Errorf("%s", string(w.b.Bytes()))
 	}
 
 	return nil
@@ -320,7 +258,7 @@ func HostKeyAddCallback(hostnameAndPort string, remote net.Addr, pubKey ssh.Publ
 
 	if exists {
 		hostname := strings.Split(hostnameAndPort, ":")[0]
-		logrus.Debugf("server SSH host key found for %s, moving on", hostname)
+		logrus.Debugf("server SSH host key found for %s", hostname)
 		return nil
 	}