在Maven的antrun-插件调用的foreach [英] Calling foreach in maven-antrun-plugin

问题描述

我试图建立的maven在我的web项目执行上的目录少CSS preprocessor。其基本流程是：

I'm trying to set up maven to execute the LESS CSS preprocessor on a directory in my web project. The basic flow is:

1. 的Maven调用Maven的antrun-插件。


2. 蚂蚁的contrib ＆LT;的foreach /＆GT; 遍历目录，发现所有的.LESS文件并调用目标
。

3. 目标执行犀牛，它执行LESS该文件进行转换。

1. Maven calls maven-antrun-plugin.
2. Ant-contrib <foreach/> loops through a directory and finds all the .less files and calls a target.
3. The target executes Rhino, which executes LESS which converts the file.

要做到这一点，我有以下XML：

To do this, I have the following XML:

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-antrun-plugin</artifactId>
            <version>1.7</version>
            <executions>
                <execution>
                    <phase>compile</phase>
                    <configuration>
                        <target name="processLessFile">
                            <!-- ... -->
                        </target>
                        <target name="main">
                            <taskdef resource="net/sf/antcontrib/antcontrib.properties" classpathref="maven.plugin.classpath"/>
                            <property name="css.dir" location="src/main/webapp/css"/>
                            <foreach param="file" target="processLessFile">
                                <fileset dir="${css.dir}">
                                    <filename name="**/*.less" />
                                </fileset>
                            </foreach>
                        </target>
                    </configuration>
                    <goals>
                        <goal>run</goal>
                    </goals>
                </execution>
            </executions>
            <dependencies>
                <dependency>
                    <groupId>ant</groupId>
                    <artifactId>ant-contrib</artifactId>
                    <version>1.0b2</version>
                </dependency>
            </dependencies>
        </plugin>

我现在遇到的问题是，主的目标开始执行，但随后在失败＆LT;＆的foreach GT; ：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.7:run (default) on project model-web-project: An Ant BuildException has occured: The following error occurred while executing this line:
[ERROR] /Users/.../pom.xml:4: Unexpected element "{http://maven.apache.org/POM/4.0.0}project" {antlib:org.apache.tools.ant}project
[ERROR] around Ant part ...<foreach param="file" target="processLessFile">... @ 6:50 in /Users/.../target/antrun/build-main.xml
[ERROR] -> [Help 1]

看来，东西蚂蚁导致它尝试读取POM文件，可能是在寻找目标。我看，这两个指标均生成到目标文件/ antrun /集结main.xml中和目标/ antrun /集结processLessFile.xml所以这是它应该寻找在目录中。

It appears that something in Ant is causing it to try read the POM file, possibly looking for the target. I see that both targets were generated into files target/antrun/build-main.xml and target/antrun/build-processLessFile.xml so that is the directory it should be looking in.

推荐答案

蚂蚁插件似乎并不支持多个目标部分的声明。您可以查看生成的Ant脚本来看看我说的：

The ant plugin does not appear to support the declaration of more than one target section. You can check the generated ANT script to see what I'm talking about:

target/antrun/build-main.xml

挖掘更深层次的插件文档规定如下：

这不是这个插件的打算提供污染POM的一种手段，因此它鼓励所有的Ant任务移动到一个build.xml文件，只是使用Ant的任务从POM调用它。

It is not the intention of this plugin to provide a means of polluting the POM, so it's encouraged to move all your Ant tasks to a build.xml file and just call it from the POM using Ant's task.

苛刻的话，但建议十分合理。我建议你​​移动你的ANT逻辑放到一个专门的文件，并调用它，如下所示：

Harsh words, but the advice is sound. I'd recommend moving your ANT logic into a dedicated file and invoke it as follows:

        <plugin>
            <artifactId>maven-antrun-plugin</artifactId>
            <version>1.7</version>
            <executions>
                <execution>
                    <phase>compile</phase>
                    <configuration>
                        <target>
                            <ant antfile="${basedir}/src/main/ant/build.xml"/>
                        </target>
                    </configuration>
                    <goals>
                        <goal>run</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>

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