Uploading artifacts to maven repository

upload-artifacts-to-maven-repo.md

Uploading artifacts to maven repository

Steps what i did to release jar file to maven repository.

What to do in few seconds

• Make Jira Sonatype account
• Create ticket (after that they create for you config on their side to allow you perform releases) see example
• Make settings.xml
• You need to cover 8 basic rules in your pom.xml.
• Generate and distribute keys
• Run mvn deploy
• After passing validations, perform release and wait cca 2 hours.

settings.xml

<settings>
  <servers>
    <server>
      <id>ossrh</id>
      <username>sonatype-jira-username</username>
      <password>sonatype-jira-password</password>
    </server>
  </servers>
</settings>

8 basic rules in your pom.xml

• See comments in code.

<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">
    
    <!-- 1. basic informations -->
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.demo</groupId>
    <artifactId>demo</artifactId>
    <version>2.3.0</version>
    <name>Demo</name>
    <url>https://github.com/demo/demo</url>
    <description>Java jar dependency for developing.</description>

    <!-- 2. scm information -->
    <scm>
        <connection>scm:git:git://github.com/neo-project/demo.git</connection>
        <developerConnection>scm:git:ssh://github.com/demo/demo.git</developerConnection>
        <url>https://github.com/demo/demo/tree/master</url>
    </scm>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
        <maven.compiler.plugin.version>3.8.0</maven.compiler.plugin.version>
        <maven.javadoc.plugin.version>3.0.1</maven.javadoc.plugin.version>
        <maven.source.plugin.version>3.0.1</maven.source.plugin.version>
        <maven.gpg.plugin.version>1.6</maven.gpg.plugin.version>
        <key.id>8ED566FF</key.id>
    </properties>

    <!-- 3. licence information -->
    <licenses>
        <license>
            <name>MIT License</name>
            <url>https://github.com/neo-project/neo-devpack-java/blob/master/LICENSE</url>
            <distribution>may be downloaded from the Maven repository</distribution>
        </license>
    </licenses>

    <!-- 4. developers information -->
    <developers>
        <developer>
            <name>Peter Szatmary</name>
            <email>peter.szatmary@gmail.com</email>
            <organization>Peter Szatmary</organization>
            <organizationUrl>https://github.com/peterszatmary</organizationUrl>
        </developer>
    </developers>

    <build>
        <sourceDirectory>src</sourceDirectory>
        <plugins>
        
            <!-- 5. sign all files with generated keys -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-gpg-plugin</artifactId>
                <version>${maven.gpg.plugin.version}</version>
                <executions>
                    <execution>
                        <id>sign-artifacts</id>
                        <phase>verify</phase>
                        <goals>
                            <goal>sign</goal>
                        </goals>
                        <configuration>
                            <keyname>${key.id}</keyname>
                            <passphraseServerId>${key.id}</passphraseServerId>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <!-- 6. attach source codes -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-source-plugin</artifactId>
                <version>${maven.source.plugin.version}</version>
                <executions>
                    <execution>
                        <id>attach-sources</id>
                        <goals>
                            <goal>jar-no-fork</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            
            <!-- 7. attach javadoc -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-javadoc-plugin</artifactId>
                <version>${maven.javadoc.plugin.version}</version>
                <executions>
                    <execution>
                        <id>attach-javadocs</id>
                        <goals>
                            <goal>jar</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${maven.compiler.plugin.version}</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                    <encoding>${project.build.sourceEncoding}</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <!-- 8. repository for uploading -->
    <distributionManagement>
        <snapshotRepository>
            <id>ossrh</id>
            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
        </snapshotRepository>
        <repository>
            <id>ossrh</id>
            <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
        </repository>
    </distributionManagement>
</project>

Generate and distribute keys

• generate keys with gpg --generate-key and follow instructions.
• checking the keys gpg --list-keys
• oficial link , oficial video
• gpg cli doesnt worked for me.
• also GPG Keychain doesnt worked
• I decided to upload my public key manualy to http://pool.sks-keyservers.net:11371 (See Submit a key section)
• show public key with gpg --armor --export <email-address> > mykeys.asc

Run mvn deploy

• if your pom is valid you will see it after mvn deploy
• After deploying artifact with mvn deploy you should see in stagingRepositories your project.
• Close button (validation will start automaticaly)
• if yo usee errors just use Drop button and make new mvn deploy

After succesful validation

• Release button + confirm.
• wait 2 hours to see artfact in maven search.
• check https://repo.maven.apache.org/maven2/