Exposed the configuration option to scan manifests on the JAR scanner. (#6097)

* Exposed the configuration option to scan manifests on the JAR scanner.

Signed-off-by: Tony Thompson <tthompson1@lenovo.com>

documentation/jetty-documentation/src/main/asciidoc/programming-guide/maven/jetty-jspc-maven-plugin.adoc

@@ -90,6 +90,16 @@ keepSources::
 Default value: false
 +
 If true, the generated .java files are not deleted at the end of processing.
+scanAllDirectories::
+Default value: true
++
+Determines if dirs on the classpath should be scanned as well as jars.
+If true, this allows scanning for tlds of dependent projects that
+are in the reactor as unassembled jars.
+scanManifest::
+Default value: true
++
+Determines if the manifest of JAR files found on the classpath should be scanned.
 sourceVersion::
 Introduced in Jetty 9.3.6.
 Java version of jsp source files.

jetty-jspc-maven-plugin/src/main/java/org/eclipse/jetty/jspc/plugin/JspcMojo.java

@@ -83,6 +83,7 @@ public class JspcMojo extends AbstractMojo
     {
 
         private boolean scanAll;
+        private boolean scanManifest;
 
         public void setClassLoader(ClassLoader loader)
         {
@@ -99,6 +100,16 @@ public class JspcMojo extends AbstractMojo
             return this.scanAll;
         }
 
+        public void setScanManifest(boolean scanManifest)
+        {
+            this.scanManifest = scanManifest;
+        }
+
+        public boolean getScanManifest()
+        {
+            return this.scanManifest;
+        }
+
         @Override
         protected TldScanner newTldScanner(JspCServletContext context, boolean namespaceAware, boolean validate, boolean blockExternal)
         {
@@ -106,6 +117,7 @@ public class JspcMojo extends AbstractMojo
             {
                 StandardJarScanner jarScanner = new StandardJarScanner();
                 jarScanner.setScanAllDirectories(getScanAllDirectories());
+                jarScanner.setScanManifest(getScanManifest());
                 context.setAttribute(JarScanner.class.getName(), jarScanner);
             }
 
@@ -243,6 +255,13 @@ public class JspcMojo extends AbstractMojo
     @Parameter(defaultValue = "true")
     private boolean scanAllDirectories;
 
+    /**
+     * Determines if the manifest of JAR files found on the classpath should be scanned.
+     * True by default.
+     */
+    @Parameter(defaultValue = "true")
+    private boolean scanManifest;
+
     @Override
     public void execute() throws MojoExecutionException, MojoFailureException
     {
@@ -319,6 +338,7 @@ public class JspcMojo extends AbstractMojo
         jspc.setOutputDir(generatedClasses);
         jspc.setClassLoader(fakeWebAppClassLoader);
         jspc.setScanAllDirectories(scanAllDirectories);
+        jspc.setScanManifest(scanManifest);
         jspc.setCompile(true);
         if (sourceVersion != null)
             jspc.setCompilerSourceVM(sourceVersion);