Ben Stringer wrote:
On Tue, 2006-06-27 at 21:56 -0700, Michael Wenk wrote:
Hi,
I am a fairly new to ant, and unfortunately, I have not been able to find my
answer by googling and searching the list archives, tho I have to figure its
been asked before. I need help in calling an external program. This program
has been compiled with make. There's some internal versioning information
that needs to be inserted into a file in the end result jar file. I do this
by calling a script. I figured out how to use <exec> to call my script:
<exec dir="${src}" executable="../../tools/genvers.pl" output="version.tmp">
<arg line="${ant.javac} ${ant.jar}"/>
</exec>
What I cant figure out is how to get ant to actually pass the full path to
javac and the full path to jar which it has used and will use. The above
doesn't work, nor does any parameter I give in the line work(It is like it
doesn't substitute the variables.) I can workaround this, but I would
prefer the clean solution. Ive checked the FAQ, manual, wiki, etc. Much of
that problem is unfortunately placing jar or javac in a query is pointless,
and I cannot formulate my search such that it doesn't have this.
Anyone know how to get ant to spill what javac and what jar program it uses?
Hi Mike,
try running ant with the -diagnostics option set. This will show a
number of properties being set to allow ant to locate resources. Ant
uses the JAVA_HOME environment variable to find javac, and you should be
able to access this as a property within ant using ${java.home}.
>
> I could not find a way to get any to print out the path to javac, but I
> would think that ${java.home}/bin/javac would be a safe assumption in
> most cases.
JavaEnvUtils.getJdkExecutable("javac");
public static String getJdkExecutable(String command) {
if (IS_NETWARE) {
// Extrapolating from:
// "NetWare may have a "java" in that directory, but 99% of
// the time, you don't want to execute it" -- Jeff Tulley
// <[EMAIL PROTECTED]>
return command;
}
File jExecutable = null;
if (IS_AIX) {
// On IBM's JDK 1.2 the directory layout is different, 1.3
follows
// Sun's layout.
jExecutable = findInDir(JAVA_HOME + "/../sh", command);
}
if (jExecutable == null) {
jExecutable = findInDir(JAVA_HOME + "/../bin", command);
}
if (jExecutable != null) {
return jExecutable.getAbsolutePath();
} else {
// fall back to JRE bin directory, also catches JDK 1.0 and 1.1
// where java.home points to the root of the JDK and Mac OS
X where
// the whole directory layout is different from Sun's
return getJreExecutable(command);
}
}
That is, its usually in JDK_HOME/bin except when it isnt.
>
I'm not sure if ant uses the jar command from
${java.home}/bin, or it's own implementation - I'm sure someone else can
answer this.
custom classes in ant.jar. Feel free to reuse under the apache license.
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