mosh-with-fallback.patch

4a5
> #   Some changes by Joe Koop 2025
352a354,370
> my @server = ( 'new' );
> 
> push @server, ( '-c', $colors );
> push @server, @bind_arguments;
> 
> if ( defined $port_request ) {
>   push @server, ( '-p', $port_request );
> }
> 
> for ( &locale_vars ) {
>   push @server, ( '-l', $_ );
> }
> 
> if ( scalar @command > 0 ) {
>   push @server, '--', @command;
> }
> 
377,393d394
<   my @server = ( 'new' );
< 
<   push @server, ( '-c', $colors );
< 
<   push @server, @bind_arguments;
< 
<   if ( defined $port_request ) {
<     push @server, ( '-p', $port_request );
<   }
< 
<   for ( &locale_vars ) {
<     push @server, ( '-l', $_ );
<   }
< 
<   if ( scalar @command > 0 ) {
<     push @server, '--', @command;
<   }
409c410,414
<   my @exec_argv = ( @ssh, @sshopts, $userhost, '--', $ssh_connection . "$server " . shell_quote( @server ) );
---
> 
>   my $install_server = "sh -c " .
>     shell_quote( 'which ' . shell_quote($server) . ' >/dev/null || ( echo "Installing mosh server..."; sudo --non-interactive apt install -y mosh >/dev/stderr </dev/null ); which ufw >/dev/null && ( sudo --non-interactive ufw status | grep -q inactive || sudo --non-interactive ufw status | grep -q mosh || ( echo "Allowing mosh through ufw..."; sudo --non-interactive ufw allow mosh )); test -f ~/.hushlogin || touch ~/.hushlogin ' ) .
>     " ; ";
>   my @exec_argv = ( @ssh, @sshopts, $userhost, '--', $ssh_connection . $install_server . "$server " . shell_quote( @server ) );
458c463,468
<     die "$0: Did not find mosh server startup message. (Have you installed mosh on your server?)\n";
---
>     print "Falling back to SSH...\n";
>     print "Run this to install mosh server:\n";
>     print "\n";
>     print 'sudo apt install -y mosh; which ufw >/dev/null && sudo ufw allow mosh' . "\n";
>     print "\n";
>     exec @ssh, $userhost