skip installation by meeting a condition in pre section of Spec file in RPM packaging

[Fawad Ali]

Hi,
    I followed Marc's method but it never goes to pre section if it is
already installed.

On Thu, Feb 17, 2011 at 10:55 PM, Stuart D. Gathman <stuart at bmsi.com> wrote:

> On Thu, 17 Feb 2011, Fawad Ali wrote:
>
> >        I am new to rpm and to rpm packaging. I was asked to copy a
> > war file from one location to another. through rpm. I packaged that.
> > So what it does is like below.
> > 1) Copy file to AUTODEPLOY folder in tomcat server
> > 2) From the AUTODEPLOY folder the tomcat server picks up the war file
> > and explodes it in WEBAPPS folder and removes the content from
> > AUTODEPLOY.
> >
> > Now if I want to REINSTALL, it should first check that whether WEBAPPS
> > contains the exploded war file or not. If yes, then it should display
> > that package is already installed and skip the installation, if the
> > web apps does not contain the exploded war file then it should force
> > the installation process.
> >
> > Can anyone tell me how can I do that.
>
> I do the following:
>
> Install the exploded webapp to a fixed directory structure.  For instance,
> our web tracking goes in /bms/webapp/webtrk with WEB-INF META-INF
> subdirs and maybe an art subdir, etc.  (If Linux Standards Base ever
> addresses the issue, it would probably belong in /usr/share/java-webapp
> or /var/lib/java-webapp instead.)
>
> Then add a symlink to your webapp container, for instance with JPP packaged
> tomcat5, add /var/lib/tomcat5/webapp/webtrk -> /bms/webapp/webtrk
>
> I also find it handy to symlink WEB-INF/classes -> /bms/java where the
> webapp
> and additional RPMs drop class files for our local java packages (so that
> the
> web app is composed of multiple versioned RPMs).  To enable this symlink,
> the RPM needs to also install META-INF/context.xml with something like:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <Context allowLinking="true">
>
>    <!-- Default set of monitored resources -->
>    <WatchedResource>WEB-INF/web.xml</WatchedResource>
>
>    <!-- Uncomment this to disable session persistence across Tomcat
> restarts -->
>    <!--
>    <Manager pathname="" />
>    -->
>
> </Context>
>
> --
>              Stuart D. Gathman <stuart at bmsi.com>
>    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
> "Confutatis maledictis, flammis acribus addictis" - background song for
> a Microsoft sponsored "Where do you want to go from here?" commercial.
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-- 
Regards,
S. Fawad Ali Shah
Software Engineer,
Stafona. Inc.
Cell# +92 334 500 1577
www.7thbillion.com
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