使用 Maven AntRun 插件检查环境变量 [英] Checking an environment variable using the Maven AntRun plugin

问题描述

我正在尝试检查是否在 maven-antrun-plugin 中设置了 MULE_HOME 环境变量，但没有成功.这是我到目前为止所拥有的:

I'm trying to check and see if the MULE_HOME environment variable is set within the maven-antrun-plugin without success. Here's what I have so far:

<plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-antrun-plugin</artifactId>
            <version>1.7</version>
            <executions>
                <execution>
                    <id>mule-deploy</id>
                    <phase>install</phase>
                    <goals>
                        <goal>run</goal>
                    </goals>
                    <configuration>
                        <target>
                            <taskdef resource="net/sf/antcontrib/antcontrib.properties"
                                     classpath="${settings.localRepository}/ant-contrib/ant-contrib/1.0b3/ant-contrib-1.0b3.jar"/>
                            <echo message="MULE_HOME is ${env.MULE_HOME}"/>
                            <if>
                                <isset property="env.MULE_HOME"/>
                                <then>
                                    <echo message="MULE_HOME is set"/>
                                </then>
                                <else>
                                    <echo message="MULE_HOME is not set"/>
                                </else>
                            </if>
                        </target>
                    </configuration>
                </execution>
            </executions>
</plugin>

输出为:

 [echo] MULE_HOME is /<my development path>/mule
 [echo] MULE_HOME is not set

检查环境变量时我缺少什么?

What am I missing to check an environment variable?

推荐答案

Java 以不同于系统属性的方式存储环境变量；System.getenv() 与 System.getProperties().我的猜测是 maven 没有将环境变量映射到系统属性中，而这正是 Ant 对 isset 的期望.尝试在您的 POM 中创建一个属性:

Java stores environment variables differently from system properties; System.getenv() vs. System.getProperties(). My guess is that maven isn't mapping environment variables into system properties which is what Ant is expecting with isset. Try creating a property in your POM:

<properties>
    <mulehome>${env.MULE_HOME}</mulehome>
<properties>

然后使用

<isset property="mulehome"/>

这篇关于使用 Maven AntRun 插件检查环境变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！