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    Inform users of missing dependencies in rb-site install.

    Review Request #820 — Created April 17, 2009 and submitted

    Information

    Review Board SVN (deprecated)
    trunk
    755, 756

    Reviewers

    Inform users of missing dependencies in rb-site install.
    
    rb-site previously didn't check for optional or required dependencies,
    meaning that a user could get far into the install and then fail at
    installation time due to the memcached or database modules not being
    available.
    
    This change adds a page after the Introduction page that will list the
    missing dependencies, giving users a chance to bail and install them. If
    they're missing support for databases altogether, then we force them to
    quit.
    Went through both console and GTK+ installs and tested that missing dependencies were listed and that the corresponding entries weren't enabled in the UIs.
    
    Simulated not having any required DB modules and verified that I wasn't allowed to continue with the install process.
    david
    1. 
        
    2. Theoretically, shouldn't this should check the encoding on $LANG?
      1. Not sure what you meant here. This is in the GTK+ UI and shouldn't really change depending on $LANG, should it? That should always be a bullet character.
        
        I can modify this in another change once I understand what's needed.
      2. Aha, you're right. I was thinking this was in the text UI.
    3. 
        
    EH
    1. The rb-site script is no longer working for console input.
    2. In the case where choice is a tuple of (text, enabled), this does not work below when checking if it is in the valid choice list.  I think this should be
      
      valid_choices.append(text)
    3. The variable valid_choice does not exist.  I think this is supposed to be "choice".
    4.