Spring Boot资源spring.factories在生成的Artifact / jar中不可用

Question

我们有一个库，为了自动配置该库，我们在（src / main / resources / META-INF）下使用spring.factories文件，该文件提供用于自动配置我的库的类。

参考：https://docs.spring.io/spring-boot/docs/1.4.0.M3/reference/htmlsingle/#boot-features-custom-starter

我在spring.factories文件中具有以下配置：

org.springframework.boot.autoconfigure.EnableAutoConfiguration=com.x.y.PubSubConfig

构建代码时spring.factories应该是生成的工件的一部分，但令我惊讶的是，我在罐子中没有看到任何Meta-Inf。

关于一点点的研究，我相信它可能与build插件有关，下面的问题围绕它进行了描述。 https://github.com/spring-projects/spring-boot/issues/8299

我的问题是我的jar中没有附带spring.factories文件，因此不会进行自动配置。以下是我的POM文件

<?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>

    <groupId>com.kramphub</groupId>
    <artifactId>pubsub-template</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
        <relativePath/>
    </parent>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <google-cloud-bom.version>0.55.1-alpha</google-cloud-bom.version>
        <selfdiagnose.version>2.15.2</selfdiagnose.version>
        <lombok.version>1.16.22</lombok.version>

        <log4j-over-slf4j.version>1.7.25</log4j-over-slf4j.version>
        <assertj-core.version>3.10.0</assertj-core.version>
    </properties>

    <distributionManagement>
        <repository>
            <id>central</id>
            <name>kramphub-releases</name>
            <url>https://kramphub.jfrog.io/kramphub/libs-release-local</url>
        </repository>
    </distributionManagement>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.google.cloud</groupId>
                <artifactId>google-cloud-bom</artifactId>
                <version>${google-cloud-bom.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/com.google.cloud/google-cloud-pubsub -->
        <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-pubsub</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>com.philemonworks</groupId>
            <artifactId>selfdiagnose</artifactId>
            <version>${selfdiagnose.version}</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>log4j-over-slf4j</artifactId>
            <version>${log4j-over-slf4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>provided</scope>
            <version>${lombok.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.assertj</groupId>
            <artifactId>assertj-core</artifactId>
            <version>${assertj-core.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <!-- verify whether necessary -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-source-plugin</artifactId>
                <version>${maven-source-plugin.version}</version>
                <executions>
                    <execution>
                        <id>attach-sources</id>
                        <phase>verify</phase>
                        <goals>
                            <goal>jar-no-fork</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>${maven-surefire-plugin.version}</version>
                <configuration>
                    <skipTests>true</skipTests>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <profiles>
        <profile>
            <id>testwithemulator</id>
            <build>
                <plugins>
                    <plugin>
                        <artifactId>maven-surefire-plugin</artifactId>
                        <configuration>
                            <skipTests>false</skipTests>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>

    <reporting>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-javadoc-plugin</artifactId>
                <version>${maven-javadoc-plugin.version}</version>
                <configuration>
                </configuration>
            </plugin>
        </plugins>
    </reporting>
</project>