蚂蚁:创建任务或类型失败

Question

(是的，我已经阅读并根据这个论坛和许多其他论坛(如JavaRanch)中类似问题的答案进行了尝试，但仍然无济于事。)

我已经根据Apache文档创建了一个自定义ant任务。

奔跑的蚂蚁，我得到:

BUILD FAILED
/home/russ/blackpearl/fun/build.xml:121: Problem: failed to create task or type sqlscriptpreprocessor
Cause: The name is undefined.
Action: Check the spelling.
Action: Check that any custom tasks/types have been declared.
Action: Check that any <presetdef>/<macrodef> declarations have taken place.
at org.apache.tools.ant.UnknownElement.getNotFoundException(UnknownElement.java:487)
at org.apache.tools.ant.UnknownElement.makeObject(UnknownElement.java:419)
at org.apache.tools.ant.UnknownElement.maybeConfigure(UnknownElement.java:163)
at org.apache.tools.ant.Task.perform(Task.java:347)

这是根据我的build.xml文件中的目标:

<target name="mysql-preprocess"
        description="Preprocess MySQL database scripts into one file">
    <sqlscriptpreprocessor inputfilepath="${basedir}/extras/blackpearl.sql.in"
                          outputfilepath="${basedir}/extras/blackpearl.sql" />
</target>

我有ant-contrib-1.0b3.jar在路径*$ANT_HOME/lib*。我在该路径上有sqlscriptpreprocessor.jar，以及构建的本地类路径。

为了解决这个问题，我尝试了下面这些语句的每一种组合，这些语句是我通过Google从各个地方收集到的，意思是"taskdef -contrib>使用taskdef sqlscriptpreprocessor>构念，两个前构念加上一个后构念，一个前构念加上两个后构念，都在一起，都没有，等等。

<taskdef resource="net/sf/antcontrib/antlib.xml" />
<taskdef resource="net/sf/antcontrib/antcontrib.properties" />
<taskdef resource="net/sf/antcontrib/antcontrib.properties">
    <classpath>
        <pathelement location="/home/russ/dev/downloads/ant-contrib/ant-contrib-1.0b3.jar" />
    </classpath>
</taskdef>
<taskdef name="sqlscriptpreprocessor" classname="com.etretatlogiciels.ant.task.SqlScriptPreprocessor" />
<taskdef resource="${basedir}/lib/ant-tasks/SqlScriptPreprocessor.properties"
         classpath="${basedir}/lib/ant-tasks/sqlscriptpreprocessor.jar" />
<taskdef resource="${basedir}/lib/ant-tasks/SqlScriptPreprocessor.properties">
    <classpath>
        <pathelement location="${basedir}/lib/ant-tasks/sqlscriptpreprocessor.jar" />
    </classpath>
</taskdef>

让人沮丧的是，在ant中添加自定义任务并不像他们说的那么容易。

我将非常感谢任何和所有的评论。

谢谢,

Russ

Answer 1

我已经纠结了两天了。我得到的答案似乎隐含在http://ant.apache.org/manual/tutorial-writing-tasks.html:

taskdef name="sqlscriptpreprocessor"…>元素必须放置在使用它的目标中，在本例中是mysql-preprocess。我没有这么做。现在，我有:

<target name="mysql-preprocess"
        description="Preprocess MySQL database scripts into one file">
    <taskdef name="sqlscriptpreprocessor"
             classname="com.etretatlogiciels.ant.task.SqlScriptPreprocessor"
             classpath="${basedir}/lib/ant-tasks/sqlscriptpreprocessor.jar" />
    <sqlscriptpreprocessor inputfilepath="${basedir}/extras/blackpearl.sql.in"
                          outputfilepath="${basedir}/extras/blackpearl.sql" />
</target>

我不明白为什么我的自定义任务必须在使用它的目标元素中定义，但这对我来说很好。我不确定这是否像它可能的那样优雅，但它现在工作了。

我很抱歉回答我自己的问题;以前也发生过一两次，我真是太差劲了。我只是希望它能帮助到别人。

感谢这两天来所有论坛和帖子中关于这个话题的所有回复。

Answer 2

在构建文件中添加下一行解决了这个问题:

<taskdef resource="net/sf/antcontrib/antlib.xml" />

Answer 3

我的留言:

/Users/packrd/Downloads/source/build.xml:435: The following error occurred while executing this line:
/Users/packrd/Downloads/source/build.xml:440: The following error occurred while executing this line:
/Users/packrd/Downloads/source/Documentation/docs/build.xml:221: The following error occurred while executing this line:
/Users/packrd/Downloads/source/Documentation/docs/asciidoc-macros.xml:249: Problem: failed to create task or type antlib:net.sf.antcontrib:switch
Cause: The name is undefined.
Action: Check the spelling.
Action: Check that any custom tasks/types have been declared.
Action: Check that any <presetdef>/<macrodef> declarations have taken place.
No types or tasks have been defined in this namespace yet
This appears to be an antlib declaration. 
Action: Check that the implementing library exists in one of:
        -/usr/local/Cellar/ant/1.10.8/libexec/lib
        -/Users/packrd/.ant/lib
        -a directory added on the command line with the -lib argument

表示我没有安装ant-contrib，修复在OS X上:

brew install ant-contrib