From the ant documentation on targets:
Only one propertyname can be specified in the if
/unless
clause.
If you want to check multiple conditions, you can use a dependend target for computing the result for the check:
<target name="myTarget" depends="myTarget.check" if="myTarget.run">
<echo>Files foo.txt and bar.txt are present.</echo>
</target>
<target name="myTarget.check">
<condition property="myTarget.run">
<and>
<available file="foo.txt"/>
<available file="bar.txt"/>
</and>
</condition>
</target>
Moreover, there were some discussions on dev@ant.apache.org and user@ant.apache.org mailing-lists:
For example, the following target
combines two properties (dir.exist
and dir.noempty
) to create another one (cloned
) using operators <and>
and <istrue>
(many other operators are documented as <or>
, <xor>
, <not>
, <isfalse>
, <equals>
, <length>
).
<target name="chk" depends="chk.exist, chk.empty" >
<condition property="cloned">
<and>
<istrue value="dir.exist" />
<istrue value="dir.noempty" />
</and>
</condition>
</target>
The above property
"cloned"
is used by targets git.clone
and git.fetch
as follows:
<target name="update" depends="git.clone, git.fetch" />
<target name="git.clone" depends="chk" unless="cloned" >
<exec executable="git" >
<arg value="clone" />
<arg value="${repo}" />
<arg value="${dir}" />
</exec>
</target>
<target name="git.fetch" depends="chk" if="cloned" >
<exec executable="git" dir="${dir}">
<arg value="fetch"/>
</exec>
</target>
<target name="chk.exist" >
<condition property="dir.exist" >
<available file="${dir}" type="dir" />
</condition>
</target>
<target name="chk.empty" >
<fileset dir="${dir}" id="fileset" />
<pathconvert refid="fileset" property="dir.noempty" setonempty="false" />
</target>