PAYARA-1714 Added command to generate bash autocomplete

nucleus/core/kernel/src/main/java/com/sun/enterprise/v3/admin/GenerateBashAutoCompletionCommand.java

@@ -0,0 +1,199 @@
+/*
+ *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ * 
+ *  Copyright (c) [2018] Payara Foundation and/or its affiliates. All rights reserved.
+ * 
+ *  The contents of this file are subject to the terms of either the GNU
+ *  General Public License Version 2 only ("GPL") or the Common Development
+ *  and Distribution License("CDDL") (collectively, the "License").  You
+ *  may not use this file except in compliance with the License.  You can
+ *  obtain a copy of the License at
+ *  https://github.com/payara/Payara/blob/master/LICENSE.txt
+ *  See the License for the specific
+ *  language governing permissions and limitations under the License.
+ * 
+ *  When distributing the software, include this License Header Notice in each
+ *  file and include the License.
+ * 
+ *  When distributing the software, include this License Header Notice in each
+ *  file and include the License file at glassfish/legal/LICENSE.txt.
+ * 
+ *  GPL Classpath Exception:
+ *  The Payara Foundation designates this particular file as subject to the "Classpath"
+ *  exception as provided by the Payara Foundation in the GPL Version 2 section of the License
+ *  file that accompanied this code.
+ * 
+ *  Modifications:
+ *  If applicable, add the following below the License Header, with the fields
+ *  enclosed by brackets [] replaced by your own identifying information:
+ *  "Portions Copyright [year] [name of copyright owner]"
+ * 
+ *  Contributor(s):
+ *  If you wish your version of this file to be governed by only the CDDL or
+ *  only the GPL Version 2, indicate your decision by adding "[Contributor]
+ *  elects to include this software in this distribution under the [CDDL or GPL
+ *  Version 2] license."  If you don't indicate a single choice of license, a
+ *  recipient has the option to distribute your version of this file under
+ *  either the CDDL, the GPL Version 2 or to extend the choice of license to
+ *  its licensees as provided above.  However, if you add GPL Version 2 code
+ *  and therefore, elected the GPL Version 2 license, then the option applies
+ *  only if the new code is made subject to such option by the copyright
+ *  holder.
+ */
+package com.sun.enterprise.v3.admin;
+
+import com.sun.enterprise.util.OS;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.lang.annotation.Annotation;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.inject.Inject;
+import org.glassfish.api.ActionReport;
+import org.glassfish.api.Param;
+import org.glassfish.api.admin.AccessRequired;
+import org.glassfish.api.admin.AdminCommand;
+import org.glassfish.api.admin.AdminCommandContext;
+import org.glassfish.api.admin.CommandLock;
+import org.glassfish.api.admin.CommandModel;
+import org.glassfish.common.util.admin.CommandModelImpl;
+import org.glassfish.hk2.api.PerLookup;
+import org.glassfish.hk2.api.ServiceHandle;
+import org.glassfish.hk2.api.ServiceLocator;
+import org.glassfish.internal.api.ServerContext;
+import org.jvnet.hk2.annotations.Service;
+
+/**
+ *
+ * @author jonathan
+ */
+@Service(name = "generate-bash-autocomplete")
+@PerLookup
+@CommandLock(CommandLock.LockType.NONE)
+@AccessRequired(resource = "domain", action = "read")
+public class GenerateBashAutoCompletionCommand implements AdminCommand {
+
+    @Param(optional = true, primary = true, name = "file")
+    String filePath;
+
+    @Param(optional = true, defaultValue = "false")
+    Boolean force;
+
+    @Inject
+    ServiceLocator habitat;
+
+    @Inject
+    ServerContext serverContext;
+
+    private File file;
+
+    // constants for writing bash script
+    private static final String VARNAME = "__asadmin_commands=\"";
+    private static final String BASH_FUNCTION = "_asadmin()\n"
+            + "{\n"
+            + "\n"
+            + "    local cur prev opts\n"
+            + "    COMREPLY=()\n"
+            + "    cur=\"${COMP_WORDS[COMP_CWORD]}\"\n"
+            + "    #prev=\"${COMP_WORDS[COMP_CWORD-1]}\"\n"
+            + "\n"
+            + "    COMPREPLY=( $(compgen -W \"${__asadmin_commands}\" -- ${cur}))\n"
+            + "\n"
+            + "}\n";
+    private static final String COMPLETE_CALL = "complete -F _asadmin asadmin";
+    private static final String ADD_PATH = "PATH=$PATH:";
+
+    private static final String DEFAULT_FILE = File.separator + "bin" + File.separator + "bash_autocomplete";
+
+    @Override
+    public void execute(AdminCommandContext context) {
+        ActionReport report = context.getActionReport();
+
+        if (!validate()) {
+            report.setActionExitCode(ActionReport.ExitCode.FAILURE);
+            report.setMessage("Unable to write to file at " + filePath + ", see server.log for details");
+            return;
+        }
+
+        List<String> commandNames = new ArrayList<>();
+        List<ServiceHandle<AdminCommand>> allCommandHandles = habitat.getAllServiceHandles(AdminCommand.class, new Annotation[0]);
+        for (ServiceHandle<AdminCommand> commandHandler : allCommandHandles) {
+            AdminCommand trueCommand = commandHandler.getService();
+            CommandModel model = new CommandModelImpl(trueCommand.getClass());
+            if (model.getCommandName() == null || model.getCommandName().startsWith("_")) {
+                continue;
+            }
+            commandNames.add(model.getCommandName());
+            for (String param : model.getParametersNames()) {
+                //    System.out.print("\t" + param);
+            }
+        }
+        if (writeCommands(commandNames)){
+            report.setActionExitCode(ActionReport.ExitCode.SUCCESS);
+            report.setMessage("Written bash autocomplete file to " + filePath);
+        } else {
+            report.setActionExitCode(ActionReport.ExitCode.FAILURE);
+            report.setMessage("Unable to write to file at " + filePath + ", see server.log for details");
+        }
+
+    }
+
+    private boolean validate() {
+
+        try {
+            if (filePath == null) {
+                filePath = serverContext.getInstallRoot().getCanonicalPath() + DEFAULT_FILE;
+            }
+            file = new File(filePath);
+            if ((file.exists() && file.isFile() && force) || file.createNewFile()) {
+                return true;
+            }
+        } catch (IOException ex) {
+            Logger.getLogger(GenerateBashAutoCompletionCommand.class.getName()).log(Level.WARNING, "Unable to create file at {0}:{1}", new Object[]{filePath, ex.getMessage()});
+        }
+        return false;
+    }
+
+
+
+    /**
+     * 
+     * @param commands
+     * @return true if written to file successfully, false otherwise
+     */
+    private boolean writeCommands(List<String> commands) {
+        try {
+            BufferedWriter writer = new BufferedWriter(new FileWriter(file));
+            //Write the opening to the list of commands
+            writer.write(VARNAME);
+            //Write all the commands to the list
+            for (String command: commands){
+                writer.write(command);
+                writer.newLine();
+            }
+            writer.write("\"");
+            writer.newLine();
+            //Write function to generate the commands
+            writer.write(BASH_FUNCTION);
+            writer.newLine();
+            //write function to tell bash what function the autocompletion is for
+            writer.write(COMPLETE_CALL);
+            writer.newLine();
+            //Add directory of payara5/glassfish/bin to the path
+            writer.write(ADD_PATH);
+            writer.write(serverContext.getInstallRoot().getPath() + File.separator + "bin");
+            //flush the buffer
+            writer.flush();
+            return true;
+        } catch (IOException ex) {
+            Logger.getLogger(GenerateBashAutoCompletionCommand.class.getName()).log(Level.WARNING, "Unable to write to file at " + filePath, ex);
+        }
+        return false;
+
+    }
+
+}