Atlassian-plugin : unknown packaging type - eclipse

Question

I want to develop Stash Plugins but can't get started. There is an error in our pom.xml.
Project build error: Unknown packaging: atlassian-plugin
Project build error: Unresolveable build extension:
Plugin com.atlassian.maven.plugins:maven-stash-plugin:6.0.0
or one of its dependencies could not be resolved:
Could not find artifact com.sun:tools:jar:1.7.0
at specified path C:\Program Files (x86)\Java\jre1.7.0_75/../lib/tools.jar
I came to know that maven is not able to identify the atlasian-plugin as the package type. Is there a way to create our own packaging type? What is the best way to resolve this issue?
The pom.xml file:
<?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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.xxxxx</groupId>
<artifactId>fkjghff</artifactId>
<version>856</version>
<organization>
<name>CATE Developer Experience</name>
<url>www.xxxxxx</url>
</organization>
<name>name of the project</name>
<description>description of the project</description>
<packaging>atlassian-plugin</packaging>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.atlassian.stash</groupId>
<artifactId>stash-parent</artifactId>
<version>${stash.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!-- CCD dependencies START -->
<dependency>
<groupId>com.atlassian.activeobjects</groupId>
<artifactId>activeobjects-plugin</artifactId>
<version>${ao.version}</version>
<scope>provided</scope>
</dependency>
<!-- SAL, the Active Objects plugin uses SAL's API for transactions -->
<dependency>
<groupId>com.atlassian.sal</groupId>
<artifactId>sal-api</artifactId>
<version>2.4.1</version>
<scope>provided</scope>
</dependency>
<!-- Google Collections, useful utilities for manipulating collections -->
<dependency>
<groupId>com.google.collections</groupId>
<artifactId>google-collections</artifactId>
<version>1.0</version>
<scope>provided</scope>
</dependency>
<!-- CCD dependencies END -->
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>com.atlassian.activeobjects</groupId>
<artifactId>activeobjects-plugin</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.atlassian.stash</groupId>
<artifactId>stash-api</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.atlassian.stash</groupId>
<artifactId>stash-spi</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.atlassian.stash</groupId>
<artifactId>stash-page-objects</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.atlassian.soy</groupId>
<artifactId>soy-template-renderer-api</artifactId>
<scope>provided</scope>
</dependency>
<!-- WIRED TEST RUNNER DEPENDENCIES -->
<!--
<dependency>
<groupId>com.atlassian.plugins</groupId>
<artifactId>atlassian-plugins-osgi-testrunner</artifactId>
<version>${plugin.testrunner.version}</version>
<scope>test</scope>
</dependency>
-->
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>jsr311-api</artifactId>
<version>1.1.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.2-atlassian-1</version>
</dependency>
<dependency>
<groupId>com.atlassian.stash</groupId>
<artifactId>stash-ssh</artifactId>
<scope>provided</scope>
<version>${stash.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.atlassian.maven.plugins</groupId>
<artifactId>maven-stash-plugin</artifactId>
<version>${amps.version}</version>
<extensions>true</extensions>
<configuration>
<products>
<product>
<id>stash</id>
<instanceId>stash</instanceId>
<version>${stash.version}</version>
<dataVersion>${stash.data.version}</dataVersion>
</product>
</products>
<systemPropertyVariables>
<johnson.spring.lifecycle.synchronousStartup>true</johnson.spring.lifecycle.synchronousStartup>
</systemPropertyVariables>
<pluginArtifacts>
<pluginArtifact>
<groupId>com.atlassian.activeobjects</groupId>
<artifactId>activeobjects-plugin</artifactId>
<version>${ao.version}</version>
</pluginArtifact>
<pluginArtifact>
<groupId>com.atlassian.activeobjects</groupId>
<artifactId>activeobjects-refapp-spi</artifactId>
<version>${ao.version}</version>
</pluginArtifact>
</pluginArtifacts>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.soy</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.js</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
<properties>
<stash.version>3.9.2</stash.version>
<stash.data.version>3.9.2</stash.data.version>
<amps.version>6.0.0</amps.version>
<jdk.version>1.8</jdk.version>
<ao.version>0.19.7</ao.version>
<plugin.testrunner.version>1.2.0</plugin.testrunner.version>
</properties>
</project>

Answer 1

Did you configure your eclipse according to this documentation?
https://developer.atlassian.com/docs/getting-started/set-up-the-atlassian-plugin-sdk-and-build-a-project/set-up-the-eclipse-ide-for-linux
(There are docs for other Operating Systems, too)
Application settings -> Maven -> Installations -> Add -> /Applications/Atlassian/atlassian-plugin-sdk-5.1.10/apache-maven-3.2.1 (or wherever your is located)
Application settings -> Maven -> User Settings -> Global Settings -> /Applications/Atlassian/atlassian-plugin-sdk-5.1.10/apache-maven-3.2.1/conf/settings.xml (or wherever your is located)

Answer 2

You have to add the following in your pom.xml:
<project>
...
<pluginRepositories>
<pluginRepository>
<id>atlassian-public</id>
<url>https://m2proxy.atlassian.com/repository/public/</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
...
</project>

Answer 3

When I read "Could not find artifact com.sun:tools:jar:1.7.0" my first guess is that you probably want to switch to a jdk instead of a jre. At the time I'm writting this comment, Atlassian is asking for a 1.8.x jdk version.