如何覆盖默认绑定到Maven插件的阶段

Question

我想在我的父pom的pluginManagement中为插件定义不同的执行,然后将特定的执行绑定到子poms中的阶段.我看到不一致的行为取决于使用的插件和pluginManagement部分的位置.

在第一个示例中,pluginManagement位于父pom中,为编译器插件定义了2个执行,为antrun插件定义了2个执行.

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<name>master-pom</name>
<modelVersion>4.0.0</modelVersion>
<groupId>plugin.test</groupId>
<artifactId>master-pom</artifactId>
<packaging>pom</packaging>
<version>1.0.0-SNAPSHOT</version>
<build>
    <pluginManagement>
        <plugins>               
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <executions>
                    <execution>
                        <id>execution-1</id>
                        <phase>none</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                        <configuration>
                            <source>1.6</source>
                            <target>1.6</target>
                            <includes>
                                <include>**/*</include>
                            </includes>
                        </configuration>
                    </execution>
                    <execution>
                        <id>execution-2</id>
                        <phase>none</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                        <configuration>
                            <source>1.5</source>
                            <target>1.5</target>
                            <includes>
                                <include>**/*</include>
                            </includes>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-antrun-plugin</artifactId>
                <version>1.7</version>
                <executions>
                    <execution>
                        <id>execution-1</id>
                        <goals>
                            <goal>run</goal>
                        </goals>
                        <configuration>
                            <target>
                                <echo message="execution 1"/>
                            </target>
                        </configuration>
                    </execution>
                    <execution>
                        <id>execution-2</id>
                        <goals>
                            <goal>run</goal>
                        </goals>
                        <configuration>
                            <target>
                                <echo message="execution 1"/>
                            </target>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

        </plugins>
    </pluginManagement>
</build>

而孩子pom:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<name>build</name>
<modelVersion>4.0.0</modelVersion>
<groupId>plugin.test</groupId>
<artifactId>build</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>pom</packaging>
<parent>
    <groupId>plugin.test</groupId>
    <artifactId>master-pom</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <relativePath>./master-pom.xml</relativePath>
</parent>
<build>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <executions>
                <execution>
                    <id>execution-1</id>
                    <phase>generate-sources</phase>
                </execution>
            </executions>
        </plugin>

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-antrun-plugin</artifactId>
            <executions>
                <execution>
                    <id>execution-1</id>
                    <phase>generate-sources</phase>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

在子pom上运行'mvn clean install'将运行编译器插件的执行,并且只执行antrun插件的第一次执行,尽管只有第一次执行才绑定到某个阶段.

现在将pluginManagement移动到子pom:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<name>build</name>
<modelVersion>4.0.0</modelVersion>
<groupId>plugin.test</groupId>
<artifactId>build</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>pom</packaging>
<build>
    <pluginManagement>
        <plugins>               
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <executions>
                    <execution>
                        <id>execution-1</id>
                        <phase>none</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                        <configuration>
                            <source>1.6</source>
                            <target>1.6</target>
                            <includes>
                                <include>**/*</include>
                            </includes>
                        </configuration>
                    </execution>
                    <execution>
                        <id>execution-2</id>
                        <phase>none</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                        <configuration>
                            <source>1.5</source>
                            <target>1.5</target>
                            <includes>
                                <include>**/*</include>
                            </includes>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-antrun-plugin</artifactId>
                <version>1.7</version>
                <executions>
                    <execution>
                        <id>execution-1</id>
                        <goals>
                            <goal>run</goal>
                        </goals>
                        <configuration>
                            <target>
                                <echo message="execution 1"/>
                            </target>
                        </configuration>
                    </execution>
                    <execution>
                        <id>execution-2</id>
                        <goals>
                            <goal>run</goal>
                        </goals>
                        <configuration>
                            <target>
                                <echo message="execution 2"/>
                            </target>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

        </plugins>
    </pluginManagement>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <executions>
                <execution>
                    <id>execution-1</id>
                    <phase>generate-sources</phase>
                </execution>
            </executions>
        </plugin>

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-antrun-plugin</artifactId>
            <executions>
                <execution>
                    <id>execution-1</id>
                    <phase>generate-sources</phase>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

这个pom提供了所需的行为,它只运行每个插件的第一次执行.编译器插件(以及大多数其他插件)仅在pluginManagement位于同一个pom并且每个执行都绑定到phase = none的情况下才能正常工作(可能是因为它将执行绑定到默认阶段).在任何情况下,antrun插件都能正常工作.

如何在父pom中使用pluginManagement部分并且不必在子poms中将不需要的执行绑定到phase = none时如何实现？这是Maven中的一个错误,还是这种行为在某种程度上是合理的？我在Maven 3.0.4和Maven 2.2.1上尝试过这个,结果相同.

Answer 1

提供的示例正常工作.包括修复后我没有重新部署父级.

大多数插件会将执行绑定到默认阶段.因此,当触发一个插件执行时,所有未绑定的执行都将绑定到默认阶段并且也将运行.

为避免此行为,父pom的pluginManagement部分中插件的所有执行都应绑定到phase = none(如提供的示例中所示).这样,除非在子poms中显式覆盖阶段,否则不会执行任何执行.