CODEWITHSUNDEEP
javaantconditional-statements
Malvon
Malvon

Reputation: 1621

Include a File If a Condition Is Met Inside Apache Ant fileset

Is there a way to include or exclude certain files based on a condition in Apache Ant (1.8.3)? For instance, I have a macrodef that takes an attribute. I would like to include certain files if the attribute's value matches xyz:

<macrodef name="pkgmacro">
    <attribute name="myattr" />
    <sequential>
         <zip destfile="${dist}/@{myattr}.war">
             <fileset dir="${dist}/webapp" >     
                 <include name="**/@{myattr}/**" />
                 <exclude name="WEB-INF/config/**" /> 
                 <!-- if @{myattr} = "xyz", then
                 <include name="PATH/TO/file.xml" />
                 -->                    
             </fileset>
             <zipfileset dir="${ear}/@{myattr}/WEB-INF/" includes="*.xml" prefix="WEB-INF/" />
         </zip>
    </sequential>
</macrodef>

For instance, if myattr value is xyz, I would like to include the commented file in portion above.

Upvotes: 1

Views: 7256

Answers (2)

Rebse
Rebse

Reputation: 10377

Fileset can use nested include/exlucde patternsets with if/unless Attribute. The pattern is included/excluded when a named property is set or not, so no ant addons needed.
Some snippet :

<project>

 <!-- property that triggers your include/exclude
      maybe set via condition in some other target .. -->
 <property name="foo" value="bar"/>

 <macrodef name="pkgmacro">
  <attribute name="myattr" />
   <sequential>
    <fileset dir="C:/whatever" id="foobar">
     <!-- alternatively
     <include name="*.bat" unless="@{myattr}"/>
     -->
     <include name="*.bat" if="@{myattr}"/>
    </fileset>
    <!-- print fileset contents -->
    <echo>${toString:foobar}</echo>
   </sequential>
 </macrodef>

 <pkgmacro myattr="foo"/>

</project>

--EDIT after comment --

The if/unless attribute after include name/exclude name checks whether the given value is a property which is set (when using if="..") or not set (when using unless="..") in the ant project scope - it doesn't check for a specific value.
<include name="*.xml" unless="foo"/>
means include is only active if no property named foo is set in your project
<include name="*.xml" if="foo"/>
means include is only active if property named foo is set in your project


Works fine for me , used Ant 1.7.1, had no Ant 1.8.x around right now :

<project>

 <echo>$${ant.version} => ${ant.version}</echo>

 <macrodef name="pkgmacro">
   <attribute name="myattr"/>
   <sequential>
     <condition property="pass">
      <equals arg1="@{myattr}" arg2="xyz" />
     </condition>
    <fileset dir="C:/whatever" id="foobar">
     <include name="*.bat" if="pass" />
    </fileset>
    <echo>${toString:foobar}</echo>
   </sequential>   
 </macrodef>

<pkgmacro myattr="xyz"/>

</project>

output :

[echo] ${ant.version} => Apache Ant version 1.7.1 compiled on June 27 2008
[echo] switchant.bat;foobar.bat;foo.bat

-- EDIT after comment --
Using serveral include patterns works fine :

...
<fileset dir="C:/whatever" id="foobar">
 <include name="*.xml" if="pass" />
 <include name="*.bat" if="pass"/>
 <include name="**/*.txt" if="pass"/>
</fileset>
...

maybe you're using the wrong patterns ?

-- EDIT after comment --

Here is the reference to <local> task which is needed to work with the properties in the current scope, in this case, <sequential>:

 <macrodef name="pkgmacro">
   <attribute name="myattr"/>
   <sequential>
     <!-- make property pass mutable -->
     <local name="pass"/>
     <condition property="pass">
      <equals arg1="@{myattr}" arg2="xyz" />
     </condition>
    <fileset dir="C:/whatever" id="foobar">
     <include name="*.xml" if="pass" />
      <include name="*.bat" if="pass" />
      <include name="**/*.txt" if="pass" />
    </fileset>
    <!-- print value of property pass and fileset contents -->
    <echo>$${pass} = ${pass}${line.separator}${toString:foobar}</echo>
   </sequential>   
 </macrodef>

Upvotes: 3

William Madruga
William Madruga

Reputation: 31

if you can use ant-contrib, then try this:

<contrib:if>
    <equals arg1="${myattr}" arg2="xyz" />
    <then>
        <include name="PATH/TO/file.xml" />
    </then>
</contrib:if>

if you can't use ant-contrib, try this:

http://jaysonlorenzen.wordpress.com/2010/03/10/apache-ant-if-else-condition-without-ant-contrib/

Upvotes: 2

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