Good point... Nice :)
On Tue, 30 Dec 2008, David Weintraub wrote:
Although you are right that Scott can use the <available> task to see
if the target is already created, I suspect Scott would want to run
the <exec> target if one of the dependencies involved has been
updated.
He should look at the <uptodate> task. This allows you to specify a
bunch of dependencies, then if one of those dependencies is newer than
the specified target, a property is then set.
You can then check this property when you execute your actual task.
Normal way to do this is something like this:
<target name="exec-task-test">
<uptodate
property="key.already.built"
target="${keystore}">
<srcfiles>
<fileset dir=.../>
</srcfiles>
</uptodate>
<target name="execute-task"
depends="exec-task-test"
unless="key.already.built">
<exec ...>
</target>
The AntContrib <outofdate> task is much more flexible and easier to
use. However, you have to install the AndContrib library in your Ant
classpath, and you have to define a <taskdef> in your build file. So,
most people simply opt for the uptodate task.
On Tue, Dec 30, 2008 at 12:13 PM, Scot P. Floess <sflo...@nc.rr.com> wrote:
You can try the following:
Stock Ant:
1) Wrap your call to exec in a target, and place an "if" on the target:
<project>
<condition property = "file.found">
<available file = "your.file"/>
</condition>
<target name="exec" if = "file.found">
<exec...>
...
</exec>
<touch file = "your.file"/>
</target>
</project>
2) Use AntContrib's if task:
<project>
<!-- include Ant Contrib here... -->
<if>
<available file = "your.file"/>
<then>
<exec...>
...
</exec>
<touch file = "your.file"/>
</then>
</if>
</project>
On Mon, 29 Dec 2008, removeps-gene...@yahoo.com wrote:
How can I make the exec task smart enough so that it won't do anything if
the file generated by the task has already been created?
For example,
<copy file="srcFile.txt" tofile="destFile.txt" verbose="true"/>
does nothing the second time. Not sure how it works, but maybe if the
timestamp of destFile.txt is equal to or larger than srcFile.txt than
nothing happens.
So what I want is something like a generatedfile argument for exec. For
example:
<exec executable="${java.home}/bin/keytool.exe"
generatedfile="${keystore}">
<arg value="-genkey"/>
<arg value="-alias"/>
<arg value="${alias}"/>
<arg value="-keyalg"/>
<arg value="RSA"/>
<arg value="-validity"/>
<arg value="36000"/>
<arg value="-keystore"/>
<arg value="${keystore}"/>
<arg value="-storepass"/>
<arg value="${storepass}"/>
<arg value="-keypass"/>
<arg value="${keypass}"/>
<arg value="-dname"/>
<arg value="${dname}"/>
</exec>
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Scot P. Floess
27 Lake Royale
Louisburg, NC 27549
252-478-8087 (Home)
919-754-4592 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate
Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros
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David Weintraub
qazw...@gmail.com
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Scot P. Floess
27 Lake Royale
Louisburg, NC 27549
252-478-8087 (Home)
919-754-4592 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate
Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros
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