如何在 Maven 中过滤资源，替换为依赖项 artifactId? [英] How to filter resource in Maven, replacing with a dependencies artifactId?

问题描述

我正在尝试构建一个将 xml 文件作为资源的 jar.我想对该 xml 应用过滤器以将依赖项的名称插入 xml.过滤工作正常，因为我能够放入 ${project.build.finalName} 并替换它.我发现 一个提示 我正在寻找的属性可能是

I'm trying to build a jar that has an xml file as a resource. I'd like to apply a filter to that xml to insert the name of a dependency into the xml. The filtering is working, because I was able to drop in ${project.build.finalName} and get it replaced. I found one hint that the property I'm looking for might be

${project.dependencies[0].artifactId}

但这似乎不起作用.我正在寻找替换

but that doesn't seem to work. I'm looking to replace

<fileName>${project.dependencies[0].artifactId}</fileName>

与

<fileName>OtherLibrary</fileName>

这可能吗?

xml，在 src/main/resources:

xml, which is in src/main/resources:

<somenode>
  <fileName>${project.dependencies[0].artifactId}</fileName>
</somenode>

pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
<groupId>com.foo</groupId>
<artifactId>Thing</artifactId>
<version>1.0-SNAPSHOT</version>
<name>Thing</name>
<url>http://maven.apache.org</url>
<build>
    <resources>
        <resource>
            <directory>${basedir}/src/main/resources</directory>
            <filtering>true</filtering>
        </resource>
    </resources>
</build>
<dependencies>
    <dependency>
        <groupId>com.pts</groupId>
        <artifactId>OtherLibrary</artifactId>
        <version>1.0-SNAPSHOT</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
</dependencies>
</project>

推荐答案

妈的，你是对的，这个属性在资源过滤的时候没有被替换.这很奇怪，听起来像 Maven 资源插件 中的错误，因为这个属性是正确的在 process-resources 阶段进行插值，正如我将在下面建议的解决方法中演示的那样(基于 maven-antrun-plugin 和 replace 任务).

Damn, you're right, this property doesn't get replaced during the filtering of resources. That's weird and it sounds like a bug in the Maven Resources Plugin because this property is correctly interpolated during the process-resources phase as I'll demonstrate in the workaround I'm suggesting below (based on the maven-antrun-plugin and the replace task).

首先，将以下内容添加到您的 POM:

First, add the following to your POM:

  <plugin>
    <artifactId>maven-antrun-plugin</artifactId>
    <executions>
      <execution>
        <phase>process-resources</phase>
        <configuration>
          <tasks>
            <echo>${project.dependencies[0].artifactId}</echo><!-- I'm a test -->
            <replace file="${project.build.outputDirectory}/myxmlfile.xml" 
                     token="@@@" value="${project.dependencies[0].artifactId}"/> 
          </tasks>
        </configuration>
        <goals>
          <goal>run</goal>
        </goals>
      </execution>
    </executions>
  </plugin>

然后，将您的 XML 文件更新为:

Then, update your XML file into:

<somenode>
  <fileName>@@@</fileName>
</somenode>

通过这些更改，运行 mvn process-resources 将产生以下结果:

With these changes, running mvn process-resources would produce the following result:

$ cat target/classes/myxmlfile.xml 
<somenode>
  <fileName>OtherLibrary</fileName>
</somenode>

这证明该属性是插值的(但在 Maven 资源过滤期间未设置)¹.如果你需要过滤多个文件，replace 任务可以采用文件集.调整它以满足您的需求.

Which proves the property is interpolated (but not set during maven filtering of resources)¹. And if you need to filter more than one file, the replace task can take a fileset. Adapt it to suit your needs.

_{¹ 其实在 Maven 2.x 资源插件. 我已经创建了 MRESOURCES-118.}

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