maven 原型:从现有属性的值生成 requiredProperty 的默认值 [英] maven archetype: generate a default value for requiredProperty from a value of an existing property
问题描述
我想为 archetype-metadata.xml 中的 requiredProperty 设置默认值,使其基于从命令行传递的另一个属性.说
I want to set a default value for a requiredProperty in archetype-metadata.xml such that it is based on another property passed from command line. Say
<requiredProperty key="customProperty">
<defaultValue>${artifactId.toUpperCase()}</defaultValue>
</requiredProperty>
但是,当我使用生成的原型生成新项目时,不是项目的 artifactId 被大写,而是原型的 artifactId.而当我将其更改为
However, when I use the resulting archetype to generate a new project, it is not the project's artifactId that gets uppercased, but rather the archetype's artifactId. Whereas when I change it to
<requiredProperty key="customProperty">
<defaultValue>${artifactId}</defaultValue>
</requiredProperty>
我得到了项目的 artifactId,正如人们所期望的那样.
I get the project's artifactId as one would expect.
有没有办法根据另一个属性的值为自定义属性分配默认值?
Is there a way to assign a default value for a custom property based on the value of another property?
注意:这仅在交互模式下发生.
mvn -B archetype:generate -DartifactId=archet -DgroupId=com.example -Dversion=1.0-SNAPSHOT -DarchetypeArtifactId=maven-archetype-archetype
出于某种原因,archetype.xml 被生成.这是我的理解,它是一种旧格式.将其替换为 archetype-metadata.xml(为了示例而最小化):
For some reason, archetype.xml gets generated. It is my understanding, it is an old format. Replaced it with archetype-metadata.xml (minimized for the sake of an example):
<?xml version="1.0" encoding="UTF-8"?>
<archetype-descriptor name="basic">
<requiredProperties>
<requiredProperty key="customPropertyUppercased">
<defaultValue>${artifactId.toUpperCase()}</defaultValue>
</requiredProperty>
<requiredProperty key="customProperty">
<defaultValue>${artifactId}</defaultValue>
</requiredProperty>
<!--JUnit version to use in generated project-->
<requiredProperty key="junit-version">
<defaultValue>4.12</defaultValue>
</requiredProperty>
</requiredProperties>
<fileSets>
<fileSet filtered="true" packaged="true">
<directory>src/main/java</directory>
</fileSet>
<fileSet filtered="true" packaged="true">
<directory>src/test/java</directory>
</fileSet>
</fileSets>
</archetype-descriptor>
./src/main/resources/archetype-resources/src/main/java/App.java 中的模板:
package ${groupId}.${artifactId};
/**
${customPropertyUppercased}
${customProperty}
*/
public class App
{
public static void main( String[] args )
{
System.out.println( "Hello World!" );
}
}
使用生成的原型生成一个新项目
Generating a new project using the resulting archetype
mvn archetype:generate -DgroupId=com.example -DartifactId=stacktest -DarchetypeArtifactId=archet -DarchetypeGroupId=com.example -DarchetypeCatalog=local
将所有属性设置为默认值会生成 stacktest/src/main/java/com/example/App.java:
with all properties set to default produces stacktest/src/main/java/com/example/App.java:
package com.example.stacktest;
/**
ARCHET
stacktest
*/
public class App
{
public static void main( String[] args )
{
System.out.println( "Hello World!" );
}
}
因此,customPropertyUppercased 基于原型的 artifactId,而 customProperty 基于项目的 artifactId.
So, the customPropertyUppercased is based on the archetype's artifactId, while customProperty is based on the project's artifactId.
推荐答案
这是原型插件中的一个错误,记录在此处:https://issues.apache.org/jira/browse/ARCHETYPE-490
This is a bug in the archetype plugin, and is documented here: https://issues.apache.org/jira/browse/ARCHETYPE-490
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