Can you use variables inside a conf file?

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Hi, this is my first posting here.

I have a mod_perl application called WeBiText, which needs to push a number of directories on the Perl include path. At the moment, I do this by including the following in my httpd.conf file:

	PerlSwitches -IC:/Users/Desiletsa/Documents/eclipse_workspace/WeBiText
	PerlSwitches -IC:/Users/Desiletsa/Documents/eclipse_workspace/WeBiText/GUI
	PerlSwitches -IC:/Users/Desiletsa/Documents/eclipse_workspace/WeBiText/bin
	PerlSwitches -IC:/Users/Desiletsa/Documents/eclipse_workspace/IIPerlUtils/TestingAndDebugging
	PerlSwitches -IC:/Users/Desiletsa/Documents/eclipse_workspace/IIPerlUtils
	PerlSwitches -IC:/Users/Desiletsa/Documents/eclipse_workspace/PerlCorpusMiner

This is not great, because it hardcodes the pathes into the httpd.conf, which means that they possibly have to be changed everytime I install the app on a different machine.

I would much prefer to write something like this:

	PerlSwitches -I$ENV{WEBITEXT_HOME}/WeBiText
	PerlSwitches -I$ENV{WEBITEXT_HOME}/WeBiText/GUI
	PerlSwitches -I$ENV{WEBITEXT_HOME}/WeBiText/bin
	PerlSwitches -I$ENV{WEBITEXT_HOME}/IIPerlUtils/TestingAndDebugging
	PerlSwitches -I$ENV{WEBITEXT_HOME}/IIPerlUtils
	PerlSwitches -I$ENV{WEBITEXT_HOME}/PerlCorpusMiner

where WEBITEXT_HOME is an OS environment variable which already needs to be set for other reasons. Alternatively, I would be OK with using $WEBITEXT_HOME instead of $ENV{WEBITEXT_HOME}, where $WEBITEXT_HOME would be a variable whose value is passed to httpd using a command line option.

Is this possible? I looked around on the web and it seems that OS environment variables can only be accessed inside <Perl> sections. And unfortunately, I can't use <Perl> sections for that specific purpose, because those sections can only appear after you have loaded mod_perl, and by then it's already too late to modify the Perl include path.

Any help would be appreciated.

Thx.

Alain

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