Bug 119922 - mechanism to contribute VM install

3 files changed, 52 insertions, 0 deletions

diff --git a/org.eclipse.core.variables/plugin.properties b/org.eclipse.core.variables/plugin.properties
index b15fcea9e..756af847a 100644
--- a/org.eclipse.core.variables/plugin.properties
+++ b/org.eclipse.core.variables/plugin.properties
@@ -13,3 +13,4 @@ pluginName=Core Variables
 providerName=Eclipse.org
 valueVariablesExtensionPointName=Value Variables
 dynamicVariablesExtensionPointName=Dynamic Variables
+eclipse_home.description=The location of the base installation for the running platform
diff --git a/org.eclipse.core.variables/plugin.xml b/org.eclipse.core.variables/plugin.xml
index 5b85ef121..97246bb7f 100644
--- a/org.eclipse.core.variables/plugin.xml
+++ b/org.eclipse.core.variables/plugin.xml
@@ -4,5 +4,13 @@
 
     <extension-point id="valueVariables" name="%valueVariablesExtensionPointName" schema="schema/valueVariables.exsd"/>
    <extension-point id="dynamicVariables" name="%dynamicVariablesExtensionPointName" schema="schema/dynamicVariables.exsd"/>
+   <extension
+         point="org.eclipse.core.variables.dynamicVariables">
+      <variable
+            description="%eclipse_home.description"
+            name="eclipse_home"
+            resolver="org.eclipse.core.internal.variables.EclipseHomeVariableResolver"
+            supportsArgument="false"/>
+   </extension>
 
 </plugin>
diff --git a/org.eclipse.core.variables/src/org/eclipse/core/internal/variables/EclipseHomeVariableResolver.java b/org.eclipse.core.variables/src/org/eclipse/core/internal/variables/EclipseHomeVariableResolver.java
new file mode 100644
index 000000000..17ca4a1a7
--- /dev/null
+++ b/org.eclipse.core.variables/src/org/eclipse/core/internal/variables/EclipseHomeVariableResolver.java
@@ -0,0 +1,43 @@
+/*******************************************************************************
+ * Copyright (c) 2006 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *     Bjorn Freeman-Benson - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.core.internal.variables;
+
+import java.net.URL;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.variables.IDynamicVariable;
+import org.eclipse.core.variables.IDynamicVariableResolver;
+import org.eclipse.osgi.service.datalocation.Location;
+
+/**
+ * Resolver for ${eclipse_home}
+ * 
+ * @since 3.2
+ */
+public class EclipseHomeVariableResolver implements IDynamicVariableResolver {
+
+    public String resolveValue(IDynamicVariable variable, String argument) throws CoreException {
+        Location installLocation = Platform.getInstallLocation();
+        if (installLocation != null) {
+            URL url = installLocation.getURL();
+            if (url != null) {
+                String file = url.getFile();
+                if (file.length() != 0) {
+                    return file;
+                }
+            }
+        }
+        return null;
+    }
+
+}