简化 Hadoop 2.4.1 Eclpse 插件编译【原创】

　　昨天折腾hadoop2X的eclipse插件，从https://github.com/winghc/hadoop2x-eclipse-plugin把源码搞下来后，很快搞定出来一个，但是。。。New Hadoop Location时，窗口出不来，汗死，原因后面会说明的。源码难下，最后我会附上源码包的。

　　仔细看了ant和ivy的文件之后，我发现了一个坑爹的现象，编译一个插件，需要ivy么？！

　　ant用了好久了，还是自己写一个的好。

　　查看了jar包，都是hadoop安装目录里面存在的，还需要连个毛线的网去检测啊！看了下ivy的调试信息，也就那么些东西，直接干掉ivy！

　　重新写了个build.xml，只要往目录hadoop2x-eclipse-plugin-master/src/contrib/eclipse-plugin里面一丢，改改前5个属性的值，直接跑“ant jar”就行了。

　　或者eclipse建立一个普通项目，把

META-INF
resources
src
build.properties
plugin.xml

往项目一丢，再把build.xml丢进去，改了前5个属性值直接跑就行了。

　　build.xml内容如下

<?xml version="1.0"?>
<project name="eclipse-plugin" default="jar">

    <property name="jdk.home" value="G:/jdk/jdk1.6.0" />
    <property name="hadoop.version" value="2.4.1" />
    <property name="hadoop.home" value="G:/hadoop/hadoop-2.4.1" />
    <property name="eclipse.version" value="3.7" />
    <property name="eclipse.home" value="G:/MyEclipse10/Common" />

    <property name="root" value="${basedir}" />
    <property file="${root}/build.properties" />

    <property name="name" value="${ant.project.name}" />
    <property name="src.dir" location="${root}/src/java" />

    <property name="build.contrib.dir" location="${root}/build/contrib" />
    <property name="build.dir" location="${build.contrib.dir}/${name}" />
    <property name="build.classes" location="${build.dir}/classes" />

    <!-- all jars together -->
    <property name="javac.deprecation" value="off" />
    <property name="javac.debug" value="on" />

    <property name="build.encoding" value="ISO-8859-1" />

    <path id="eclipse-sdk-jars">
        <fileset dir="${eclipse.home}/plugins/">
            <include name="org.eclipse.ui*.jar" />
            <include name="org.eclipse.jdt*.jar" />
            <include name="org.eclipse.core*.jar" />
            <include name="org.eclipse.equinox*.jar" />
            <include name="org.eclipse.debug*.jar" />
            <include name="org.eclipse.osgi*.jar" />
            <include name="org.eclipse.swt*.jar" />
            <include name="org.eclipse.jface*.jar" />
            <include name="org.eclipse.team.cvs.ssh2*.jar" />
            <include name="com.jcraft.jsch*.jar" />
        </fileset>
    </path>

    <path id="project-jars">
        <fileset file="${build.dir}/lib/*.jar" />
    </path>

    <target name="init" unless="skip.contrib">
        <echo message="contrib: ${name}" />
        <mkdir dir="${build.dir}" />
        <mkdir dir="${build.classes}" />
        <mkdir dir="${build.dir}/lib" />
        <copy todir="${build.dir}/lib/" verbose="true">
            <fileset dir="${hadoop.home}/share/hadoop/mapreduce">
                <include name="hadoop*.jar" />
                <exclude name="*test*"/>
                <exclude name="*example*"/>
            </fileset>
            <fileset dir="${hadoop.home}/share/hadoop/common">
                <include name="hadoop*.jar" />
                <exclude name="*test*"/>
                <exclude name="*example*"/>
            </fileset>
            <fileset dir="${hadoop.home}/share/hadoop/hdfs">
                <include name="hadoop*.jar" />
                <exclude name="*test*"/>
                <exclude name="*example*"/>
            </fileset>
            <fileset dir="${hadoop.home}/share/hadoop/yarn">
                <include name="hadoop*.jar" />
                <exclude name="*test*"/>
                <exclude name="*example*"/>
            </fileset>
            <fileset dir="${hadoop.home}/share/hadoop/common/lib">
                <include name="protobuf-java-*.jar" />
                <include name="log4j-*.jar" />
                <include name="commons-cli-*.jar" />
                <include name="commons-collections-*.jar" />
                <include name="commons-configuration-*.jar" />
                <include name="commons-lang-*.jar" />
                <include name="jackson-core-asl-*.jar" />
                <include name="jackson-mapper-asl-*.jar" />
                <include name="slf4j-log4j12-*.jar" />
                <include name="slf4j-api-*.jar" />
                <include name="guava-*.jar" />
                <include name="hadoop-annotations-*.jar" />
                <include name="hadoop-auth-*.jar" />
                <include name="commons-cli-*.jar" />
                <include name="netty-*.jar" />
            </fileset>
        </copy>
    </target>

    <target name="compile" depends="init" unless="skip.contrib">
        <echo message="contrib: ${name}" />
        <javac fork="true"  executable="${jdk.home}/bin/javac" encoding="${build.encoding}" srcdir="${src.dir}" includes="**/*.java" destdir="${build.classes}" debug="${javac.debug}" deprecation="${javac.deprecation}" includeantruntime="on">
            <classpath refid="eclipse-sdk-jars" />
            <classpath refid="project-jars" />
        </javac>
    </target>

    <target name="jar" depends="compile" unless="skip.contrib">

        <pathconvert property="mf.classpath" pathsep=",lib/">
            <path refid="project-jars" />
            <flattenmapper />
        </pathconvert>

        <jar jarfile="${build.dir}/hadoop-${hadoop.version}-eclipse-${eclipse.version}-plugin.jar" manifest="${root}/META-INF/MANIFEST.MF">
            <manifest>
                <attribute name="Bundle-ClassPath" value="classes/,lib/${mf.classpath}" />
            </manifest>
            <fileset dir="${build.dir}" includes="classes/ lib/" />
            <fileset dir="${root}" includes="resources/ plugin.xml" />
        </jar>
    </target>


    <target name="clean">
        <echo message="contrib: ${name}" />
        <delete dir="${build.dir}" />
    </target>

</project>

　　最前面5个属性中，jdk.home指定编译时用的jdk，hadoop和eclipse版本号是用来给jar起名字的，hadoop.home是hadoop安装目录，会从里面提取需要的文件，eclipse.home是eclipse的安装目录，MyEclipse中是那个Common目录。

　　原版中坑爹的jar包版本号无视了，MANIFEST.MF的classpath值也懒得去改了，都自动了，虽然自动会多了几个值，但是总比少的好。

　　又回到最开始的问题，new hadoop location时的窗口问题，是因为少了commons-collections包，所以直接从hadoop安装目录把这个包拉进来打包了，然后问题解决！

　　用jdk1.6编译了两个插件包，MyEclipse10的和Eclipse4.4的，都能用。至于上传文件时由于当前用户名导致的权限问题，这个就是改配置或改代码的事情了，我是编译前直接在源码里面加了两行，反正插件随便编译一下就有了。

　　最后附上官方源码，里面原先那个打包好的插件干掉了，都是旧的，还巨大无比！下载源码包