Hi, David, Jan

Many thanks for taking the trouble to explain all this!

I've ended up with this in an ant.conf file:


#!/bin/sh

DITA_HOME=~/DITA-OT1.4.2.1
DITA_HOME=`cd "$DITA_HOME" && pwd`

#export ANT_HOME="$DITA_HOME"/tools/ant
export ANT_HOME=/Developer/Java/Ant
export ANT_OPTS="-Xmx512m"
export ANT_ARGS="-lib $DITA_HOME/lib -Ddita.dir=$DITA_HOME"


Are you saying I don't need to export any of these? I can just define
them?

The DITA Toolkit includes its own version of ant, so I can switch
between it and the XCode installed version.

Many thanks,
David


> On Mon, May 19, 2008 at 7:44 AM, <dhollis@(protected)>
> wrote:
>> I find shell scripts distinctly un-intutive, so no, I haven't
>> tried it!
>
> Let's look at the scripts step by step:
>
>> if [ -z "$ANT_HOME" -o "$ANT_HOME" = "/usr/share/ant" ]; then
>>    if [ -f "/etc/ant.conf" ] ; then
>>       . /etc/ant.conf
>>    fi
>> fi
>
> The outer if/then statement says if ANT_HOME isn't defined, or it is
> defined as /usr/share/ant, then you check to see if the file
> /etc/ant.conf exists. If it does, you execute it in the current
> environment. This file should set some environment variables -- maybe
> even the $ANT_HOME environment variable. This is the system wide
> ant.conf file. You could set JAVA_HOME, ANT_HOME, whether to use the
> jikes compiler, etc. And, these would apply to anyone who uses that
> computer and doesn't have their own ANT installation.
>
>>
>> # load user ant configuration
>> if [ -f "$HOME/.ant/ant.conf" ] ; then
>>   . $HOME/.ant/ant.conf
>> fi
>> if [ -f "$HOME/.antrc" ] ; then
>>   . "$HOME/.antrc"
>> fi
>
> The first if/ten statement looks to see if a file called
> $HOME/.ant/ant.conf exists. If it does, it executes it in the current
> environment. Again, this file probably just sets some environment
> variables including JAVA_HOME and ANT_HOME.
>
> The second if/then statement does the same thing for $HOME/.antrc.
>
> Files that begin with a dot are normally invisible to the user. It is
> common practice to have either a .xxxrc file to set parameters or to
> have a .xxx directory that contains a *.conf file that sets
> parameters. Ant does it both ways for no good reason.
>
>
>> Do I have to use both Set and Export for ANT_HOME, do you think?
>
> Exporting an environment variable makes it available in all child
> processes. Otherwise, it is only available in the current process. If
> you define ANT_HOME in your .antrc file, you don't have to export it
> since the shell script doesn't spawn another process. If you define it
> before you run this script, you do have to export it or the script
> won't see it.
>
> BTW, notice that the ant script sets
>
>   JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Home
>
> if you don't have JAVA_HOME defined before your execute the "ant"
> script on a Mac.
>
> --
> David Weintraub
> qazwart@(protected)

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