Java maven checkstyle插件中的变量${project.version}来自子项目

我和骆驼父母有一个项目

我收到：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check (default-cli) on project demo: 
Execution default-cli of goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check failed: 
Plugin org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0 or one of its dependencies could not be resolved: 
Could not find artifact org.apache.camel:camel-buildtools:jar:1.0.0-SNAPSHOT

1.0.0-SNAPSHOT来自我的项目版本=1.0.0-SNAPSHOT

这是camel-parent-2.23.1.pom的一部分

org.apache.maven.plugins
maven checkstyle插件
${maven checkstyle插件版本}
org.apache.camel
驼峰构建工具
${project.version}
com.puppycrawl.tools
代码检查
${maven checkstyle version}

我假设mvn checkstyle:check必须使用camel版本（2.23.1）作为project.version

---

为什么不起作用？

如果生成子项目，

${project.version}$

是子项目的版本号。属性不能有不同的值，这取决于定义是在父级POM中还是在子级POM中。

这是否意味着我不能将camel用作父级，我必须将其用作依赖项？我不知道如何使用apache camel，但camel父级似乎是内部父级POM，不打算由apache camel的用户使用。

mvn checkstyle:check 

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check (default-cli) on project demo: 
Execution default-cli of goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check failed: 
Plugin org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0 or one of its dependencies could not be resolved: 
Could not find artifact org.apache.camel:camel-buildtools:jar:1.0.0-SNAPSHOT

<plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-checkstyle-plugin</artifactId>
          <version>${maven-checkstyle-plugin-version}</version>
          <dependencies>
            <dependency>
              <groupId>org.apache.camel</groupId>
              <artifactId>camel-buildtools</artifactId>
              <version>${project.version}</version>
            </dependency>
            <dependency>
              <groupId>com.puppycrawl.tools</groupId>
              <artifactId>checkstyle</artifactId>
              <version>${maven-checkstyle-version}</version>
            </dependency>