| // Copyright (C) 2009 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gerrit.sshd; |
| |
| import com.google.gerrit.server.CurrentUser; |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| import com.google.inject.assistedinject.Assisted; |
| |
| import org.apache.sshd.server.Command; |
| import org.apache.sshd.server.Environment; |
| |
| import java.io.IOException; |
| import java.io.UnsupportedEncodingException; |
| import java.util.Map; |
| |
| /** |
| * Command that dispatches to a subcommand from its command table. |
| */ |
| final class DispatchCommand extends BaseCommand { |
| interface Factory { |
| DispatchCommand create(String prefix, Map<String, Provider<Command>> map); |
| } |
| |
| private final Provider<CurrentUser> currentUser; |
| private final String prefix; |
| private final Map<String, Provider<Command>> commands; |
| private Command cmd; |
| |
| @Inject |
| DispatchCommand(final Provider<CurrentUser> cu, @Assisted final String pfx, |
| @Assisted final Map<String, Provider<Command>> all) { |
| currentUser = cu; |
| prefix = pfx; |
| commands = all; |
| } |
| |
| @Override |
| public void start(final Environment env) throws IOException { |
| if (commandLine.isEmpty()) { |
| usage(); |
| return; |
| } |
| |
| final String name, args; |
| int sp = commandLine.indexOf(' '); |
| if (0 < sp) { |
| name = commandLine.substring(0, sp); |
| while (Character.isWhitespace(commandLine.charAt(sp))) { |
| sp++; |
| } |
| args = commandLine.substring(sp); |
| } else { |
| name = commandLine; |
| args = ""; |
| } |
| |
| if (name.equals("help") || name.equals("--help") || name.equals("-h")) { |
| usage(); |
| return; |
| } |
| |
| final Provider<Command> p = commands.get(name); |
| if (p != null) { |
| final Command cmd = p.get(); |
| |
| synchronized (this) { |
| this.cmd = cmd; |
| } |
| |
| if (cmd.getClass().getAnnotation(AdminCommand.class) != null) { |
| final CurrentUser u = currentUser.get(); |
| if (!u.isAdministrator()) { |
| err.write("fatal: Not a Gerrit administrator\n".getBytes(ENC)); |
| err.flush(); |
| onExit(BaseCommand.STATUS_NOT_ADMIN); |
| return; |
| } |
| } |
| |
| provideStateTo(cmd); |
| if (cmd instanceof BaseCommand) { |
| final BaseCommand bc = (BaseCommand) cmd; |
| if (commandPrefix.isEmpty()) |
| bc.setCommandPrefix(name); |
| else |
| bc.setCommandPrefix(commandPrefix + " " + name); |
| bc.setCommandLine(args); |
| } |
| cmd.start(env); |
| } else { |
| final String msg = prefix + ": " + name + ": not found\n"; |
| err.write(msg.getBytes(ENC)); |
| err.flush(); |
| onExit(BaseCommand.STATUS_NOT_FOUND); |
| } |
| } |
| |
| @Override |
| public void destroy() { |
| synchronized (this) { |
| if (cmd != null) { |
| cmd.destroy(); |
| cmd = null; |
| } |
| } |
| } |
| |
| private void usage() throws IOException, UnsupportedEncodingException { |
| final StringBuilder usage = new StringBuilder(); |
| if (prefix.indexOf(' ') < 0) { |
| usage.append("usage: " + prefix + " COMMAND [ARGS]\n"); |
| } |
| usage.append("\n"); |
| usage.append("Available commands of " + prefix + " are:\n"); |
| usage.append("\n"); |
| for (Map.Entry<String, Provider<Command>> e : commands.entrySet()) { |
| usage.append(" "); |
| usage.append(e.getKey()); |
| usage.append("\n"); |
| } |
| usage.append("\n"); |
| |
| usage.append("See '"); |
| if (prefix.indexOf(' ') < 0) { |
| usage.append(prefix); |
| usage.append(' '); |
| } |
| usage.append("COMMAND --help' for more information.\n"); |
| usage.append("\n"); |
| err.write(usage.toString().getBytes("UTF-8")); |
| err.flush(); |
| onExit(1); |
| } |
| } |