Google Plugin for Eclipse Luna？

根据Google Plugin for Eclipse社区论坛的说法，我们也许可以在7月中旬之前期待一个支持Luna的新插件。

https://groups.google.com/forum/#!topic/google-plugin-eclipse/4YACQROrB2U

事实证明，有一种方法可以更改清单，以允许Google插件开普勒安装在Eclipse Luna中。Google Groups上的贡献者Ze Kritter编写了一个Apache Ant文件，该文件执行必要的工作，原文在这里，并在下面复制。build.xml

它对我来说效果很好。我已经成功地运行了这个脚本并将插件安装到Luna中，并且 - 至少对于GWT - 它似乎像往常一样工作。

根据Google网上论坛的讨论线程，与Maven插件存在一些不兼容之处（我个人不使用Maven），并且一个新的且经过适当测试的Google插件将很快发布（2014年7月下旬）。

<?xml version="1.0" encoding="UTF-8"?>

<project name="gpe.4.luna" basedir="." default="update.end">
    <property environment="env"/>

    <property name="project.base.dir" value="."/>
    <property name="project.temp.dir" value="${project.base.dir}/temp"/>
    <property name="project.plugin.dir" value="${project.base.dir}/plugin"/>
    <property name="project.plugins.dir" value="${project.plugin.dir}/plugins"/>
    <property name="e42.plugin.jar" value="${project.plugins.dir}/com.google.gdt.eclipse.platform.e42_3.6.0.v201406262229-rel-r43.jar"/>
    <property name="artifacts.jar" value="${project.plugin.dir}/artifacts.jar"/>
    <property name="content.jar" value="${project.plugin.dir}/content.jar"/>

    <property name="plugin43.zip" value="com.google.gdt.eclipse.suite.4.3.update.site_3.6.0.zip"/>
    <property name="plugin44.zip" value="com.google.gdt.eclipse.suite.4.4.update.site_3.6.0.zip"/>

    <!--
        source: http://stackoverflow.com/a/5340557/3747097
        Loads entries from a manifest file.

        @jar     The jar from where to read
        @file    A manifest file to read
        @prefix  A prefix to prepend
        @section The name of the manifest section to load
    -->
    <scriptdef name="loadManifest" language="javascript" loaderRef="sharedbuild-loaderRef">
        <attribute name="jar" />
        <attribute name="file" />
        <attribute name="prefix" />
        <attribute name="section" />
        <![CDATA[
            var jarname = attributes.get("jar");
            var filename = attributes.get("file");
            if (jarname != null && filename != null) {
                self.fail("Only one of jar or file is required");
            }
            var prefix = attributes.get("prefix");
            if (prefix == null) {
                prefix = "";
            }
            var section = attributes.get("section");

            var manifest;
            if (jarname != null) {
                var jarfile = new java.util.jar.JarFile(new java.io.File(jarname));
                manifest = jarfile.getManifest();
            } else if (filename != null) {
                manifest = new java.util.jar.Manifest(new java.io.FileInputStream(new java.io.File(filename)));
            } else {
                self.fail("One of jar or file is required");
            }

            if (manifest == null) {
                self.log("No manifest in " + jar);
            } else {
                var attributes = (section == null) ? manifest.getMainAttributes() : manifest.getAttributes(section);
                if (attributes != null) {
                    var iter = attributes.entrySet().iterator();
                    while (iter.hasNext()) {
                        var entry = iter.next();
                        // self.log("key " + entry.getKey());
                        // self.log("value " + entry.getValue());
                        project.setProperty(prefix + entry.getKey(), entry.getValue());
                    }
                }
            }
        ]]>
    </scriptdef>

    <!--
        source: http://giorgio-ferrara.blogspot.ru/2010/09/apache-ant-how-to-search-and-replace.html
    -->
    <macrodef name="replaceStringWithRegExp">
        <attribute name="string"/>
        <attribute name="searchPattern"/>
        <attribute name="replacementPattern"/>
        <attribute name="property"/>
        <sequential>
            <tokens id="id">
                <concat>
                <string value="@{string}"/>
                <filterchain>
                    <tokenfilter>
                        <replaceregex pattern="@{searchPattern}"
                                    replace="@{replacementPattern}"
                                    flags="g"/>
                    </tokenfilter>
                </filterchain>
                </concat>
            </tokens>
            <property name="@{property}" value="${toString:id}"/>
        </sequential>
    </macrodef>

    <target name="clean">
        <delete dir="${project.temp.dir}"/>
        <delete dir="${project.plugin.dir}"/>
        <delete file="${plugin44.zip}"/>
    </target>

    <target depends="clean" name="init">
        <mkdir dir="${project.temp.dir}"/>
    </target>

    <target depends="init" name="check.source">
        <condition property="plugin-not-found">
            <not>
                <available file="${plugin43.zip}"/>
            </not>
        </condition>
    </target>

    <target depends="check.source" name="get.source" if="${plugin-not-found}">
        <get src="https://commondatastorage.googleapis.com/eclipse_toolreleases/products/gpe/release/3.6.0/4.3/com.google.gdt.eclipse.suite.4.3.update.site_3.6.0.zip" dest="."/>
    </target>

    <target depends="check.source, get.source" name="unzip.source">
        <unzip src="${plugin43.zip}" dest="${project.plugin.dir}"/>
    </target>

    <target depends="unzip.source" name="update.manifest">
        <checksum file="${e42.plugin.jar}" property="original.md5"/>
        <loadManifest jar="${e42.plugin.jar}" prefix="e42.mf."/>
        <replaceStringWithRegExp string="${e42.mf.Require-Bundle}"
            searchPattern="(.*);bundle-version=&quot;\[3.8.0,3.10.0\)&quot;(.*)"
            replacementPattern="\1\2"
            property="Require-Bundle"/>
        <!--
        <echo>${e42.mf.Require-Bundle}</echo>
        <echo>${Require-Bundle}</echo>
        -->
        <jar update="true" file="${e42.plugin.jar}">
            <manifest>
                <attribute name="Require-Bundle" value="${Require-Bundle}"/>
            </manifest>
        </jar>
        <checksum file="${e42.plugin.jar}" property="updated.md5"/>
        <!--
        <echo>${original.md5}</echo>
        <echo>${updated.md5}</echo>
        -->
    </target>

    <target depends="update.manifest" name="update.artifacts">
        <delete includeemptydirs="true">
            <fileset dir="${project.temp.dir}" includes="**/*"/>
        </delete>
        <unzip src="${artifacts.jar}" dest="${project.temp.dir}"/>
        <replaceregexp byline="true">
            <regexp pattern="${original.md5}"/>
            <substitution expression="${updated.md5}"/>
            <fileset dir="${project.temp.dir}"/>
        </replaceregexp>
        <zip destfile="${artifacts.jar}" basedir="${project.temp.dir}"/>
    </target>

    <target depends="update.artifacts" name="update.content">
        <delete includeemptydirs="true">
            <fileset dir="${project.temp.dir}" includes="**/*"/>
        </delete>
        <unzip src="${content.jar}" dest="${project.temp.dir}"/>
        <replaceregexp byline="true">
            <regexp pattern="name='org.eclipse.core.runtime' range='\[3.8.0,3.10.0\)'"/>
            <substitution expression="name='org.eclipse.core.runtime' range='0.0.0'"/>
            <fileset dir="${project.temp.dir}"/>
        </replaceregexp>
        <zip destfile="${content.jar}" basedir="${project.temp.dir}"/>
    </target>

    <target depends="update.content" name="create.updated.plugin">
        <zip destfile="${plugin44.zip}" basedir="${project.plugin.dir}"/>
        <delete dir="${project.temp.dir}"/>
        <delete dir="${project.plugin.dir}"/>
    </target>

    <target depends="create.updated.plugin" name="update.end">
        <echo message="plugin rebuild success"/>
    </target>

</project>

我将在这里添加 Eclipse Mars 这个词，这样就可以通过搜索找到这个解决方案，并可能适应 2015 年 6 月发布的 Eclipse。