[Fedora-packaging] how to check on upgrade rpm

[Léon Keijser]

Hi,

I'm making a package of a webapp that consists mainly of php and image
files. When installing the package for the first time, an '/install'
directory is copied. The user accesses the webapp for the first time,
configures it and has to remove the install directory for the webapp to
function properly.

But when doing an upgrade of the package it's not supposed to install
the 'install' directory again, as the webapp will recognize the presence
of the directory and fails to function afterwards. 

There are a number of ways on how to approach this, but what is the best
method?

I thought about placing these lines in the %install section:

% define my_home /var/www/html/packagename
if ! [ -d %{my_home} ]; then
  install -m 755 -d $RPM_BUILD_ROOT%{my_home}/install
  %define fresh_install 1
fi

Then in the %files section:

%if %{fresh_install}
  %dir %{my_home}/install
%endif


But that doesn't seem to work. 

-- 
Léon