如何过滤Maven中的资源，替换依赖关系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具有xml文件作为资源的jar。我想将一个过滤器应用于xml，以将依赖项的名称插入到xml中。过滤正在工作，因为我可以在 $ {project.build.finalName} 中删除​​，并将其替换。我发现我正在寻找的物业的一个提示可能是

  $ {project.dependencies [0] .artifactId} 
  pre> 
 
 
但似乎不起作用。我正在寻找替换
 < fileName> $ {project.dependencies [0] .artifactId}< / fileName> 
  
与
 <文件名> OtherLibrary< /文件名> 
  
可以吗？
 
 
 
 xml，这在src / main / resources中：
 < somenode> 
< fileName> $ {project.dependencies [0] .artifactId}< / fileName> 
< / somenode> 
  
 pom.xml：
 <？xml version =1.0encoding =UTF-8？> 
< project xsi：schemaLocation =http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsdxmlns = 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> 
<依赖关系> 
<依赖关系> 
< groupId> com.pts< / groupId> 
< artifactId> OtherLibrary< / artifactId> 
< version> 1.0-SNAPSHOT< / version> 
< scope>已提供< / scope> 
< / dependency> 
<依赖关系> 
< groupId> junit< / groupId> 
< artifactId> junit< / artifactId> 
< version> 3.8.1< / version> 
< scope> test< / scope> 
< / dependency> 
< / dependencies> 
< / project> 
  
 
 
解决方案
嗯，你是对的，在资源过滤过程中不得更换。这很奇怪，这听起来像 Maven资源插件中的错误，因为此属性正确在进程资源阶段内插，我将在下面我建议的解决方法中演示（基于maven-antrun-plugin和 替换 任务）。 
 
 
 
首先，将以下内容添加到您的POM中：
 插件> 
< artifactId> maven-antrun-plugin< / artifactId> 
<执行> 
< execution> 
< phase> process-resources< / phase> 
< configuration> 
< tasks> 
< echo> $ {project.dependencies [0] .artifactId}< / echo><！ - 我是一个测试 - > 
< replace file =$ {project.build.outputDirectory} /myxmlfile.xml
 token =@@@value =$ {project.dependencies [0] .artifactId}/ > 
< / tasks> 
< / configuration> 
< goals> 
< goal>运行< / goal> 
< / goals> 
< / execution> 
< / executions> 
< / plugin> 
  
然后，将您的XML文件更新为：
 < somenode> 
< fileName> @@@< / fileName> 
< / somenode> 
  
通过这些更改，运行 mvn process-resources 将产生以下结果：
  $ cat target / classes / myxmlfile.xml 
< somenode> 
< fileName> OtherLibrary< / fileName> 
< / somenode> 
  
哪个证明属性是插值的（但是在资源的maven过滤期间不设置） 1 。如果您需要过滤多个文件， 替换 任务可以采取一个文件集。适应您的需要。 
 
 
 
   1  实际上，在 Maven 2.x资源插件。我创建了 MRESOURCES-118 。 
 
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 
${project.dependencies[0].artifactId}
but that doesn't seem to work.  I'm looking to replace
<fileName>${project.dependencies[0].artifactId}</fileName>
with
<fileName>OtherLibrary</fileName>
Is that possible?

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>

解决方案
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). 

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>
Then, update your XML file into:
<somenode>
  <fileName>@@@</fileName>
</somenode>
With these changes, running mvn process-resources would produce the following result:
$ cat target/classes/myxmlfile.xml 
<somenode>
  <fileName>OtherLibrary</fileName>
</somenode>
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 Actually, it would be nice to create a new Jira for this bug in the Maven 2.x Resources Plugin. I've created MRESOURCES-118.

                        
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