[Oomph-Setup] Add jdt.core configuration setup

Additionally add a styled and drag&drop-able Oomph Configuration button
to the main README.

Part of eclipse-platform/eclipse.platform.releng.aggregator#2430

README.md

@@ -22,6 +22,10 @@ Please bear in mind that this project is almost entirely developed by volunteers
 If you do not provide the implementation yourself (or pay someone to do it for you), the bug might never get fixed.
 If it is a serious bug, other people than you might care enough to provide a fix.
 
+[![Create Eclipse Development Environment for JDT Core](https://download.eclipse.org/oomph/www/setups/svg/JDT_Core.svg)](
+https://www.eclipse.org/setups/installer/?url=https://raw.githubusercontent.com/eclipse-jdt/eclipse.jdt.core/master/org.eclipse.jdt.core.setup/JdtCoreConfiguration.setup&show=true
+"Click to open Eclipse-Installer Auto Launch or drag into your running installer")
+
 ## License
 
 [Eclipse Public License (EPL) v2.0](https://www.eclipse.org/legal/epl-2.0/)

org.eclipse.jdt.core.setup/.project

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.eclipse.jdt.core.setup</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+	</buildSpec>
+	<natures>
+	</natures>
+</projectDescription>

org.eclipse.jdt.core.setup/.settings/org.eclipse.core.resources.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/<project>=UTF-8

org.eclipse.jdt.core.setup/JdtCoreConfiguration.setup

@@ -0,0 +1,90 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<setup:Configuration
+    xmi:version="2.0"
+    xmlns:xmi="http://www.omg.org/XMI"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:setup="http://www.eclipse.org/oomph/setup/1.0"
+    label="JDT Core">
+  <annotation
+      source="http://www.eclipse.org/oomph/setup/BrandingInfo">
+    <detail
+        key="imageURI">
+      <value>https://www.eclipse.org/downloads/images/committers.png</value>
+    </detail>
+    <detail
+        key="badgeLabel">
+      <value>JDT Core</value>
+    </detail>
+  </annotation>
+  <installation
+      name="jdt.core.installation"
+      label="JDT Core Installation">
+    <setupTask
+        xsi:type="setup:VariableTask"
+        name="installation.id.default"
+        value="jdt-core"/>
+    <productVersion
+        href="index:/org.eclipse.setup#//@productCatalogs[name='org.eclipse.applications']/@products[name='eclipse.platform.sdk']/@versions[name='latest']"/>
+    <description>The JDT Core installation provides the latest tools needed to work with the project's source code.</description>
+  </installation>
+  <workspace
+      name="jdt.core.workspace"
+      label="JDT Core Workspace">
+    <setupTask
+        xsi:type="setup:VariableTask"
+        name="workspace.id.default"
+        value="jdt-core-ws"/>
+    <setupTask
+        xsi:type="setup:CompoundTask"
+        name="User Preferences">
+      <annotation
+          source="http://www.eclipse.org/oomph/setup/UserPreferences">
+        <detail
+            key="/instance/org.eclipse.oomph.setup.ui/showToolBarContributions">
+          <value>record</value>
+        </detail>
+      </annotation>
+      <setupTask
+          xsi:type="setup:CompoundTask"
+          name="org.eclipse.oomph.setup.ui">
+        <setupTask
+            xsi:type="setup:PreferenceTask"
+            key="/instance/org.eclipse.oomph.setup.ui/showToolBarContributions"
+            value="true"/>
+      </setupTask>
+      <setupTask
+          xsi:type="setup:CompoundTask"
+          name="org.eclipse.ui.ide">
+        <setupTask
+            xsi:type="setup:PreferenceTask"
+            key="/instance/org.eclipse.ui.ide/WORKSPACE_NAME"
+            value="JDT Core"/>
+      </setupTask>
+    </setupTask>
+    <setupTask
+        xsi:type="setup:VariableTask"
+        name="eclipse.git.authentication.style"
+        defaultValue="anonymous"/>
+    <stream
+        href="index:/org.eclipse.setup#//@projectCatalogs[name='org.eclipse']/@projects[name='jdt']/@projects[name='core']/@streams[name='master']"/>
+    <stream
+        href="index:/org.eclipse.setup#//@projectCatalogs[name='org.eclipse']/@projects[name='jdt']/@projects[name='core']/@projects[name='tests']/@streams[name='master']"/>
+    <stream
+        href="index:/org.eclipse.setup#//@projectCatalogs[name='org.eclipse']/@projects[name='jdt']/@projects[name='core']/@projects[name='testbinaries']/@streams[name='master']"/>
+    <description>The JDT Core workspace provides all the source code of the project.</description>
+  </workspace>
+  <description>
+    &lt;p>
+    The &lt;code>JDT Core&lt;/code> configuration provisions a dedicated development environment for the complete set of projects that comprise the JDT Core,
+    i.e. the projects that are contained in the &lt;a href=&quot;https://github.com/eclipse-jdt/jdt.core&quot;>jdt.core&lt;/a> repository.
+    &lt;/p>
+    &lt;p>
+    The installation is based on the latest successful integration build of the &lt;code>Eclipse Platform SDK&lt;/code>,
+    the PDE target platform, like the installation, is also based on the latest integration build,
+    and the API baseline is based on the most recent release.
+    &lt;p>
+    &lt;/p>
+    Please &lt;a href=&quot;https://wiki.eclipse.org/Eclipse_Platform_SDK_Provisioning&quot;>read the tutorial instructions&lt;/a> for more details.
+    &lt;/p>
+  </description>
+</setup:Configuration>