exec-maven-plugin没有正确评估<classpath>依赖项</classpath>

时间:2012-12-12 18:00:12

标签: maven classpath dependency-management

上下文:我有一个调用可执行文件的Maven目标(它恰好是一个Groovy脚本,但无所谓),它需要一个参数作为运行时ibrary的路径(它碰巧是JDBC驱动程序,但它也无关紧要。)

我没有硬编码驱动程序的路径,而是将其构建为classpath dependency,以便从Maven存储库所在的位置选择它(我们有不同的操作系统的不同环境)。

<classpath>
    <dependency>postgresql:postgresql</dependency> <!-- groupId:artifactId -->
</classpath>

问题:类路径未按预期解析,而不是库的路径,它是空的(因此调用失败)。

pom.xml的相关部分如下:

<dependency>
  <groupId>postgresql</groupId>
  <artifactId>postgresql</artifactId>
  <version>9.1-901.jdbc4</version>
  <scope>provided</scope>
</dependency>


<plugin>
  <groupId>org.codehaus.mojo</groupId>
  <artifactId>exec-maven-plugin</artifactId>
  <version>1.2.1</version>
  <executions>
    <execution>
      <id>initialize-rule-plugin</id>
      <phase>compile</phase>
        <goals><goal>exec</goal></goals>
        <configuration>
          <executable>full\path\to\groovy</executable>
          <arguments>
            <argument>-cp</argument>
              <classpath>
                <dependency>postgresql:postgresql</dependency>
              </classpath>
            <argument>myscript.groovy</argument>
          </arguments>
        </configuration>
      </execution>
  </executions>
</plugin>

调试输出为:

[DEBUG] Configuring mojo 'org.codehaus.mojo:exec-maven-plugin:1.2.1:exec' with basic configurator -->
[DEBUG]   (s) dependency = postgresql:postgresql
[DEBUG]   (f) arguments = [-cp, Classpath { postgresql:postgresql}, ]
[...]
[DEBUG] Collected project artifacts [org.springframework:spring-context:jar:3.1.2.RELEASE:compile, org.springframework:spring-aop:jar:3.1.2.RELEASE:compile, org.springframework:spring-beans:jar:3.1.2.RELEASE:compile, org.springframework:spring-core:jar:3.1.2.RELEASE:compile, org.springframework:spring-expression:jar:3.1.2.RELEASE:compile, org.springframework:spring-asm:jar:3.1.2.RELEASE:compile, org.springframework:spring-webmvc:jar:3.1.2.RELEASE:compile, org.springframework:spring-context-support:jar:3.1.2.RELEASE:compile, org.springframework:spring-web:jar:3.1.2.RELEASE:compile, org.springframework:spring-tx:jar:3.1.2.RELEASE:compile, aopalliance:aopalliance:jar:1.0:compile, org.springframework:spring-orm:jar:3.1.2.RELEASE:compile, org.springframework:spring-jdbc:jar:3.1.2.RELEASE:compile, org.slf4j:slf4j-api:jar:1.7.1:compile, org.slf4j:jcl-over-slf4j:jar:1.7.1:runtime, org.slf4j:slf4j-log4j12:jar:1.7.1:runtime, log4j:log4j:jar:1.2.17:compile, javax.validation:validation-api:jar:1.0.0.GA:compile, org.hibernate:hibernate-validator:jar:4.3.0.Final:compile, org.jboss.logging:jboss-logging:jar:3.1.0.CR2:compile, org.hibernate:hibernate-entitymanager:jar:4.1.7.Final:compile, org.jboss.spec.javax.transaction:jboss-transaction-api_1.1_spec:jar:1.0.0.Final:compile, dom4j:dom4j:jar:1.6.1:compile, org.javassist:javassist:jar:3.15.0-GA:compile, org.hibernate:hibernate-core:jar:4.1.7.Final:compile, antlr:antlr:jar:2.7.7:compile, org.hibernate.common:hibernate-commons-annotations:jar:4.0.1.Final:compile, org.hibernate.javax.persistence:hibernate-jpa-2.0-api:jar:1.0.1.Final:compile, org.codehaus.jackson:jackson-mapper-asl:jar:1.9.10:compile, org.codehaus.jackson:jackson-core-asl:jar:1.9.10:compile, javax.servlet:jstl:jar:1.2:compile, commons-dbcp:commons-dbcp:jar:1.4:compile, commons-pool:commons-pool:jar:1.5.4:compile, org.codehaus.groovy:groovy-all:jar:2.0.5:compile]
[DEBUG] Collected project classpath [C:\projects\myproject\target\classes]
[DEBUG] Toolchains are ignored, 'executable' parameter is set to c:\full\path\to\groovy
[DEBUG] Executing command line: cmd /c c:\full\path\to\groovy.bat -cp C:\projects\myproject\target\classes myscript.groovy 

可以看出,它没有获取驱动程序的类路径(存在)。

我已尝试使用和不使用参考中的依赖项版本号。

提前谢谢。

1 个答案:

答案 0 :(得分:1)

根据我的评论,我找到了另一种方法来做同样的事情。由于没有其他解决方案发布,如果有人遇到同样的问题,我会将其发布为答案。

关键是使用另一个插件,它可以动态创建填充jar路径的属性。

<plugin>
  <groupId>org.bitstrings.maven.plugins</groupId>
  <artifactId>dependencypath-maven-plugin</artifactId>
  <version>1.1.1</version>
  <executions>
    <execution>
      <id>set-all</id>
      <goals>
        <goal>set</goal>
      </goals>
    <configuration>
      <propertySets>
        <propertySet>
          <includes>
            <include>postgresql:postgresql:jar</include>
          </includes>
        </propertySet>
      </propertySets>
    </configuration>
    </execution>
  </executions>
</plugin>

[...]

<execution>
  <id>my-script</id>
  <phase>compile</phase>
  <goals>
    <goal>exec</goal>
  </goals>
  <configuration>
    <executable>path/to/groovy</executable>
    <arguments>
      <argument>-cp</argument>
      <argument>${postgresql:postgresql:jar}</argument>
      <argument>my-script.groovy</argument>
    </arguments>
  </configuration>
</execution>