Nevermind, I found the answer on this page:
www.issociate.de/board/goto/1147159/Using_environment_variable_in_httpd.conf.html
Although it's an undocumented features, you can acess the OS env variables with
a syntax like: ${WEBITEXT_HOME}.
I tried it and it works. The funny thing is that I am sure I tried this 3 weeks
ago and it hadn't worked. Oh well.
Alain
-----Original Message-----
From: Desilets, Alain [mailto:alain.desil...@nrc-cnrc.gc.ca]
Sent: Wednesday, January 25, 2012 6:51 AM
To: users@httpd.apache.org
Subject: [users@httpd] Can you use variables inside a conf file?
Hi, this is my first posting here.
I have a mod_perl application called WeBiText, which needs to push a number of
directories on the Perl include path. At the moment, I do this by including the
following in my httpd.conf file:
PerlSwitches -IC:/Users/Desiletsa/Documents/eclipse_workspace/WeBiText
PerlSwitches
-IC:/Users/Desiletsa/Documents/eclipse_workspace/WeBiText/GUI
PerlSwitches
-IC:/Users/Desiletsa/Documents/eclipse_workspace/WeBiText/bin
PerlSwitches
-IC:/Users/Desiletsa/Documents/eclipse_workspace/IIPerlUtils/TestingAndDebugging
PerlSwitches
-IC:/Users/Desiletsa/Documents/eclipse_workspace/IIPerlUtils
PerlSwitches
-IC:/Users/Desiletsa/Documents/eclipse_workspace/PerlCorpusMiner
This is not great, because it hardcodes the pathes into the httpd.conf, which
means that they possibly have to be changed everytime I install the app on a
different machine.
I would much prefer to write something like this:
PerlSwitches -I$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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