error in installation when the makefile calls a non-existing page

Hello,

I'll try to explain the bug I discovered an how I resolved it.

I wanted to install openpublish distribution. In its makefile, it called to a non existing page (404)

Using the quickstart-create command works great until :

Drush command terminated abnormally due to an unrecoverable error.                                                                                                                                                          [error]
Error: Uncaught exception 'Exception' with message '
  chown: cannot access `/home/drupalpro/websites/site.dev': No such file or directory' in /home/drupalpro/drupalpro/drush_addons/quickstart/quickstart.inc:30
Stack trace:
#0 /home/drupalpro/drupalpro/drush_addons/quickstart/quickstart.drush.inc(205): quickstart_shell_exec('sudo chown -R :...')
#1 [internal function]: drush_quickstart_fixperms()
#2 /home/drupalpro/drush/includes/command.inc(324): call_user_func_array('drush_quickstar...', Array)
#3 /home/drupalpro/drush/includes/command.inc(198): _drush_invoke_hooks('quickstart-fixp...', Array, 'quickstart')
#4 [internal function]: drush_command()
#5 /home/drupalpro/drush/includes/command.inc(165): call_user_func_array('drush_command', Array)
#6 /home/drupalpro/drush/drush.php(90): drush_dispatch(Array)
#7 /home/drupalpro/drush/drush.php(59): _drush_bootstrap_and_dispatch()
#8 /home/drupalpro/drush/drush.php(14): drush_main()
#9 {main}
  thrown in /home/drupalpro/drupalpro/drush_addons/quickstart/quickstart.inc, line 30
Fatal error: Uncaught exception 'Exception' with message ' in /home/drupalpro/drupalpro/drush_addons/quickstart/quickstart.inc on line 30

Exception: 
  chown: cannot access `/home/drupalpro/websites/site.dev': No such file or directory in /home/drupalpro/drupalpro/drush_addons/quickstart/quickstart.inc on line 30

Call Stack:
    0.0004     370936   1. {main}() /home/drupalpro/drush/drush.php:0
    0.0206    3108912   2. drush_main() /home/drupalpro/drush/drush.php:14
    0.0803    7473948   3. _drush_bootstrap_and_dispatch() /home/drupalpro/drush/drush.php:59
    0.1064    7479764   4. drush_dispatch() /home/drupalpro/drush/drush.php:90
    0.1298    7487608   5. call_user_func_array() /home/drupalpro/drush/includes/command.inc:165
    0.1298    7487800   6. drush_command() /home/drupalpro/drush/includes/command.inc:0
    0.1299    7487964   7. _drush_invoke_hooks() /home/drupalpro/drush/includes/command.inc:198
    0.1308    7524692   8. call_user_func_array() /home/drupalpro/drush/includes/command.inc:324
    0.1308    7524884   9. drush_quickstart_fixperms() /home/drupalpro/drush/includes/command.inc:0
    0.1366    7529552  10. quickstart_shell_exec() /home/drupalpro/drupalpro/drush_addons/quickstart/quickstart.drush.inc:205    

But the installation continues with :

Running installer (takes a minute, check cpu activity) ...                                                                                                                                                                  [ok]
file_get_contents(/home/drupalpro/websites/site.dev/CHANGELOG.txt): failed to open stream: No such file or directory quickstart.inc:285                                                                                     [warning]
Command site-install needs a higher bootstrap level to run - you will need invoke drush from a more functional Drupal environment to run this command.                                                                      [error]
The drush command 'site-install standard' could not be executed.                                                                                                                                                            [error]
The directory /home/drupalpro/websites/site.dev does not contain a valid Drupal installation                                                                                                                                [error]
                                                                                                                                                                                                                            [ok]
URL:  http://site.dev
Admin user:  admin
Admin password: admin
                                                ... done.                                                                                                                                                                   [ok]
Command completed successfully.     

At the end, we do have a success message although there is nothing in websites/site.dev and accessing site.dev throws a permission error.

Simply deleting the not existing project in the makefile resolved the issue.

Is there a way that the script could check for page existence (404) before downloading/installing ?

Hope I could help :)