过滤在ant中将一个文件复制到多个文件

Question

我有一个执行过滤器复制的ant任务，我只更改参数多次调用它。这是为各种环境创建属性文件。

我想简化调用目标，这样我可以做更少的复制和粘贴。

这是调用目标

<target name="create_local_property_files" depends="clean,prepare">
    <!-- create first machine property files -->
    <antcall target="property.filter.copy" inheritAll="false">
        <param name="tmp.dom" value="machine1" />
    </antcall>
    <!-- create second machine property files -->
    <antcall target="property.filter.copy" inheritAll="false">
        <param name="tmp.dom" value="machine2" />
    </antcall>
            [...] <!-- to the n'th machine property file -->
</target>

我想打一个电话，然后传递一份机器清单。有什么建议吗?

这是用于完整性的过滤器复制目标

<target name="property.filter.copy">
    <copy todir="${local.property.file.dir}" failonerror="true" verbose="true" overwrite="true">
        <filterset>
            <!-- Uses the same filters files as scripts -->
            <filtersfile file="${property.variables.dir}/${tmp.dom}.properties" />
        </filterset>
        <fileset dir="${property.file.dir}">
            <include name="cnmp.properties" />
            <include name="cnmp.jdo.properties" />
        </fileset>
        <!-- Deployment script looks for hostname.rest_of_filename-->
        <globmapper from="*" to="${tmp.dom}.*" />
    </copy>
</target>

Answer 1

我建议对重复的代码段使用macrodef

<project name="demo" default="copy">
    <macrodef name="propertyFilterCopy">
        <attribute name="tmp.dom"/>
        <attribute name="local.property.file.dir" default="build/properties"/>
        <attribute name="property.variables.dir"  default="build/variables"/>
        <attribute name="property.file.dir"       default="build/files"/>
        <sequential>
            <copy todir="@{local.property.file.dir}" failonerror="true" verbose="true" overwrite="true">
                <filterset>
                    <filtersfile file="@{property.variables.dir}/@{tmp.dom}.properties" />
                </filterset>
                <fileset dir="@{property.file.dir}">
                    <include name="cnmp.properties" />
                    <include name="cnmp.jdo.properties" />
                </fileset>
                <globmapper from="*" to="@{tmp.dom}.*" />
            </copy>
        </sequential>
    </macrodef>
    <target name="copy" depends="gen-data">
        <propertyFilterCopy tmp.dom="machine1"/>
        <propertyFilterCopy tmp.dom="machine2"/>
    </target>
    <target name="gen-data">
        <mkdir dir="build/properties"/>
        <mkdir dir="build/variables"/>
        <mkdir dir="build/files"/>
        <echo file="build/files/cnmp.properties">x=1</echo>
        <echo file="build/files/cnmp.jdo.properties">x=1</echo>
        <echo file="build/variables/machine1.properties">x=1</echo>
        <echo file="build/variables/machine2.properties">x=1</echo>
    </target>
    <target name="clean">
        <delete dir="build"/>
    </target>
</project>

macrodef的第二个优点是它们可以打包成antlib，这进一步增加了可重用构建逻辑的可移植性。

Answer 2

在ant-contrib中有一些循环可以很好地完成这项工作。

查看foreach任务的实例