我正在使用 Maven 开发一个混合 java 和 kotlin 项目。
我现在面临的问题是maven-compiler-plugin编译前运行kotlin-maven-plugin.
[INFO] --- maven-compiler-plugin:3.0:compile (default-compile) @annotation ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 11 source files to /Users/hannes/workspace/tikxml/annotation/target/classes
[INFO] --- kotlin-maven-plugin:1.0.0-beta-4583:compile (compile) @ annotation
[INFO] Kotlin Compiler version 1.0.0-beta-4583
在我的 java 源代码中，我引用了用 kotlin 编写的类。但 javac 先于 kotlinc 运行。因此，maven 会因编译器错误而中断。
我的pom（父pom，我使用子模块）看起来像这样：
<?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">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.sonatype.oss</groupId>
<artifactId>oss-parent</artifactId>
<version>7</version>
</parent>
...
<modules>
<module>core</module>
<module>annotation</module>
<module>processor</module>
</modules>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.7</java.version>
<kotlin.version>1.0.0-beta-4583</kotlin.version>
</properties>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.0</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<version>${kotlin.version}</version>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
<configuration>
<sourceDirs>
<source>src/main/java</source>
</sourceDirs>
</configuration>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>test-compile</goal>
</goals>
<configuration>
<sourceDirs>
<source>src/test/java</source>
</sourceDirs>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Kotlin 文档使用Maven https://kotlinlang.org/docs/reference/using-maven.html建议明确绑定kotlin-maven-plugin执行到process-sources阶段。自从maven-compiler-plugin绑定到compile相、结合kotlin-maven-plugin to the process-sources阶段使其首先运行。
<plugin>
<artifactId>kotlin-maven-plugin</artifactId>
<groupId>org.jetbrains.kotlin</groupId>
<version>${kotlin.version}</version>
<executions>
<execution>
<id>compile</id>
<phase>process-sources</phase>
<goals> <goal>compile</goal> </goals>
</execution>
<execution>
<id>test-compile</id>
<phase>process-test-sources</phase>
<goals> <goal>test-compile</goal> </goals>
</execution>
</executions>
</plugin>
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