[FIXED] Publish Maven project to Github Package

Issue

Objective

Publish private maven project to GitHub packages as a private repo for use in other projects.

Getting Error

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.8.2:deploy (default-deploy) on project SecuritySpringBootContracts: Failed to deploy artifacts: Could not transfer artifact com.sagar:SecuritySpringBootContracts:jar:0.0.3 from/to contracts (https://maven.pkg.github.com/sagarnayak/SecuritySpringBootContracts): transfer failed for https://maven.pkg.github.com/sagarnayak/SecuritySpringBootContracts/com/sagar/SecuritySpringBootContracts/0.0.3/SecuritySpringBootContracts-0.0.3.jar, status: 422 Unprocessable Entity

My private repository in GitHub

https://github.com/sagarnayak/SecuritySpringBootContracts

My code

Settings.xml in C:\Users\SAGAR\ .m2

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                  http://maven.apache.org/xsd/settings-1.0.0.xsd">

<activeProfiles>
    <activeProfile>github</activeProfile>
</activeProfiles>

<profiles>
    <profile>
        <id>github</id>
        <repositories>
            <repository>
                <id>central</id>
                <url>https://repo1.maven.org/maven2</url>
            </repository>
            <repository>
                <id>contracts</id>
                <url>https://maven.pkg.github.com/sagarnayak/SecuritySpringBootContracts</url>
                <releases>
                    <enabled>true</enabled>
                </releases>
                <snapshots>
                    <enabled>true</enabled>
                </snapshots>
            </repository>
        </repositories>
    </profile>
</profiles>

<servers>
    <server>
        <id>contracts</id>
        <username>sagarnayak</username>
        <password>ghp_WRGrhj380s8vikAcZMp4j1z02</password>
    </server>
</servers>

pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.sagar</groupId>
    <artifactId>SecuritySpringBootContracts</artifactId>
    <version>0.0.3</version>
    <name>SecuritySpringBootContracts</name>
    <description>SecuritySpringBootContracts</description>
    <properties>
        <java.version>11</java.version>
        <kotlin.version>1.5.31</kotlin.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-reflect</artifactId>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-stdlib-jdk8</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
        <testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.jetbrains.kotlin</groupId>
                <artifactId>kotlin-maven-plugin</artifactId>
                <configuration>
                    <args>
                        <arg>-Xjsr305=strict</arg>
                    </args>
                    <compilerPlugins>
                        <plugin>spring</plugin>
                    </compilerPlugins>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.jetbrains.kotlin</groupId>
                        <artifactId>kotlin-maven-allopen</artifactId>
                        <version>${kotlin.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

    <distributionManagement>
        <repository>
            <id>contracts</id>
            <name>contracts package</name>
            <url>https://maven.pkg.github.com/sagarnayak/SecuritySpringBootContracts</url>
        </repository>
    </distributionManagement>
</project>

When I type mvnw deploy I get the error -

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.8.2:deploy (default-deploy) on project SecuritySpringBootContracts: Failed to deploy artifacts: Could not transfer artifact com.sagar:SecuritySpringBootContracts:jar:0.0.3 from/to contracts (https://maven.pkg.github.com/sagarnayak/SecuritySpringBootContracts): transfer failed for https://maven.pkg.github.com/sagarnayak/SecuritySpringBootContracts/com/sagar/SecuritySpringBootContracts/0.0.3/SecuritySpringBootContracts-0.0.3.jar, status: 422 Unprocessable Entity

Any suggestion is appreciated.

Solution

As mentioned in this issue Publishing GitHub Packages returns 422 error
the cause appears to be the name of your maven artifact, it must be lowercase.

In your pom.xml, use for example <artifactId>security-springboot-contracts</artifactId> instead of <artifactId>SecuritySpringBootContracts</artifactId>

Answered By - FrankyFred