ant变量作用域

1. 在<project>里<target>外定义的变量，该xml里的所有<target>都可见这个变量，调用的别的xml里的<target>也可见。
2. 在<target>里定义的变量，跟这个<target>无关的<target>不可见这个变量，
   把这个<target>作为depends和被调用的<target>可见这个变量。

例子:
运行mybuild1.xml,默认执行target: test,mybuild1.xml和mybuild2.xml文件里的target相互调用关系，

在这些target里的变量的作用域的可见范围见运行结果。

mybuild1.xml

<?xml version="1.0" encoding="UTF-8"?><project name="auto.all.ci" default="test" basedir="." xmlns:fl="antlib:it.haefelinger.flaka">    <taskdef resource="net/sf/antcontrib/antcontrib.properties">        <classpath>            <pathelement location="${ant.libs}/ant-contrib-0.6.jar" />        </classpath>    </taskdef>    <property name="varInProject" value="InProject"></property>    <target name="vars">        <property name="varInDependsTarget" value="InDepends"></property>    </target>    <target name="test" depends="vars">        <property name="varInParentTarget" value="InParentTarget"></property>        <antcall target="subTarget" />        <ant antfile="mybuild2.xml" target="subTarget1" >            <property name="varInNested" value="InNested"></property>        </ant>    </target>    <target name="noRelation">        <property name="varInNoRelationTarget" value="InNoRelationTarget"></property>    </target>    <target name="subTarget">        <echo>varInParentTarget:${varInParentTarget}</echo>        <echo>varInDependsTarget:${varInDependsTarget}</echo>        <echo>varInProject:${varInProject}</echo>        <echo>varInNoRelationTarget:${varInNoRelationTarget}</echo>    </target></project>

mybuild2.xml

<?xml version="1.0" encoding="UTF-8"?><project name="auto.all.ci" default="subTarget1" basedir="." xmlns:fl="antlib:it.haefelinger.flaka">    <taskdef resource="net/sf/antcontrib/antcontrib.properties">        <classpath>            <pathelement location="${ant.libs}/ant-contrib-0.6.jar" />        </classpath>    </taskdef>    <target name="subTarget1">        <echo>varInParentTarget:${varInParentTarget}</echo>        <echo>varInDependsTarget:${varInDependsTarget}</echo>        <echo>varInProject:${varInProject}</echo>        <echo>varInNested:${varInNested}</echo>    </target></project>

运行结果：