Re: [Wrapper-user] conf question: referencing defined properties

[<da...@ix...>]

In article <3E6...@ta...>,
Leif Mortenson  <wra...@li...> wrote:
>I am not sure I am grasping what it is you want to do. At what point do
>you want the
>replacements to happen? At run time? If so, what is the difference
>between what you
>are asking for and an environment variable?

At run time.

Ok, lets say I am distributing a product that has a file that has
something like this:

wrapper.java.classpath.1=../lib/wrapper.jar
wrapper.java.classpath.2=%MYAPP_LIB%/Utils.jar
wrapper.java.classpath.3=%MYAPP_LIB%/Engine.jar
...
wrapper.java.classpath.25=%MYAPP_LIB%/Help.jar

Now, let's say the user has 3 different installations in different
directories doing different things.

Well, I have to go into the conf files and search and replace MYAPP_LIB
with MYAPP_LIB_1, and MYAPP_LIB_2.  I might as well not bother with
environment variables then.

But, instead, if I could do something like:

MYAPP_LIB=C:\installation1\....\lib

wrapper.java.classpath.1=../lib/wrapper.jar
wrapper.java.classpath.2=${MYAPP_LIB}/Utils.jar
wrapper.java.classpath.3=${MYAPP_LIB}/Engine.jar
...
wrapper.java.classpath.25=${MYAPP_LIB}/Help.jar

Then I only have to modify one line in each file.  This is less prone to
error, could even be constrained to a #include <location.conf> type of
file, that would limit what a user has to modify down to one file that has
just a couple of lines.

In a unix implementation, I could just do something like have the init
script set up different environment variables for each installtion (well, I
think, I've not actually used wrapper there, yet).  But I don't have that
option with NT services.  I'd like to keep the .conf files that I
distribute as pristine as possible, only having to change a couple of lines
(or, as I pointed out, an include file would be better).

I'm certainly not set on the ant-like syntax, I just figured it was something
common enough to be a good example.

mrc
-- 
     Mike Castle      da...@ix...      www.netcom.com/~dalgoda/
    We are all of us living in the shadow of Manhattan.  -- Watchmen
fatal ("You are in a maze of twisty compiler features, all different"); -- gcc