allow executable of signjar and verifyjat to be configured. PR 39189.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@697133 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -371,6 +371,10 @@ Other changes:
    ProjectHelper2 will be used just like in ant 1.7.1.
    Bugzilla Report 42208.
 
+ * It is now possible to explicitly set the executable used by
+   <signjar>.
+   Bugzilla Report 39189.
+
 Changes from Ant 1.7.0 TO Ant 1.7.1
 =============================================
 

docs/manual/CoreTasks/signjar.html

@@ -141,7 +141,17 @@ block</td>
     timestamped JAR files in Java1.5+</td>
     <td valign="top" align="center">No</td>
   </tr>
-  
+  <tr>
+    <td valign="top">executable</td>
+    <td valign="top">Specify a particular <code>jarsigner</code> executable
+      to use in place of the default binary (found in the same JDK as
+      Ant is running in).<br/>
+      Must support the same command line options as the Sun JDK
+      jarsigner command.
+      <em>since Ant 1.8.0</em>.</td>
+    <td align="center" valign="top">all</td>
+    <td align="center" valign="top">No</td>
+  </tr>  
 </table>
 <h3>Parameters as nested elements</h3>
 <table border="1" cellpadding="2" cellspacing="0">

src/main/org/apache/tools/ant/taskdefs/AbstractJarSignerTask.java

@@ -103,6 +103,13 @@ public abstract class AbstractJarSignerTask extends Task {
      */
     private Path path = null;
 
+    /**
+     * The executable to use instead of jarsigner.
+     *
+     * @since Ant 1.8.0
+     */
+    private String executable;
+
     /**
      * Set the maximum memory to be used by the jarsigner process
      *
@@ -250,6 +257,16 @@ public abstract class AbstractJarSignerTask extends Task {
         return redirector;
     }
 
+    /**
+     * Sets the actual executable command to invoke, instead of the binary
+     * <code>jarsigner</code> found in Ant's JDK.
+     * @param executable the command to invoke.
+     * @since Ant 1.8.0
+     */
+    public void setExecutable(String executable) {
+        this.executable = executable;
+    }
+
     /**
      * these are options common to signing and verifying
      * @param cmd  command to configure
@@ -315,7 +332,11 @@ public abstract class AbstractJarSignerTask extends Task {
      */
     protected ExecTask createJarSigner() {
         final ExecTask cmd = new ExecTask(this);
-        cmd.setExecutable(JavaEnvUtils.getJdkExecutable(JARSIGNER_COMMAND));
+        if (executable == null) {
+            cmd.setExecutable(JavaEnvUtils.getJdkExecutable(JARSIGNER_COMMAND));
+        } else {
+            cmd.setExecutable(executable);
+        }
         cmd.setTaskType(JARSIGNER_COMMAND);
         cmd.setFailonerror(true);
         cmd.addConfiguredRedirector(redirector);