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// 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.gitblit.transport.ssh.commands;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.inject.Provider;
import org.apache.sshd.server.Command;
import org.apache.sshd.server.Environment;
import org.kohsuke.args4j.Argument;
import com.gitblit.transport.ssh.CommandMetaData;
import com.gitblit.utils.cli.SubcommandHandler;
import com.google.common.base.Charsets;
import com.google.common.base.Strings;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
public class DispatchCommand extends BaseCommand {
@Argument(index = 0, required = false, metaVar = "COMMAND", handler = SubcommandHandler.class)
private String commandName;
@Argument(index = 1, multiValued = true, metaVar = "ARG")
private List<String> args = new ArrayList<String>();
private Set<Provider<Command>> commands;
private Map<String, Provider<Command>> map;
public DispatchCommand() {}
public DispatchCommand(Map<String, Provider<Command>> map) {
this.map = map;
}
public void setMap(Map<String, Provider<Command>> m) {
map = m;
}
public DispatchCommand(Set<Provider<Command>> commands) {
this.commands = commands;
}
private Map<String, Provider<Command>> getMap() {
if (map == null) {
map = Maps.newHashMapWithExpectedSize(commands.size());
for (Provider<Command> cmd : commands) {
CommandMetaData meta = cmd.get().getClass().getAnnotation(CommandMetaData.class);
map.put(meta.name(), cmd);
}
}
return map;
}
@Override
public void start(Environment env) throws IOException {
try {
parseCommandLine();
if (Strings.isNullOrEmpty(commandName)) {
StringWriter msg = new StringWriter();
msg.write(usage());
throw new UnloggedFailure(1, msg.toString());
}
final Provider<Command> p = getMap().get(commandName);
if (p == null) {
String msg =
(getName().isEmpty() ? "Gitblit" : getName()) + ": "
+ commandName + ": not found";
throw new UnloggedFailure(1, msg);
}
final Command cmd = p.get();
if (cmd instanceof BaseCommand) {
BaseCommand bc = (BaseCommand) cmd;
if (getName().isEmpty()) {
bc.setName(commandName);
} else {
bc.setName(getName() + " " + commandName);
}
bc.setArguments(args.toArray(new String[args.size()]));
} else if (!args.isEmpty()) {
throw new UnloggedFailure(1, commandName + " does not take arguments");
}
provideStateTo(cmd);
//atomicCmd.set(cmd);
cmd.start(env);
} catch (UnloggedFailure e) {
String msg = e.getMessage();
if (!msg.endsWith("\n")) {
msg += "\n";
}
err.write(msg.getBytes(Charsets.UTF_8));
err.flush();
exit.onExit(e.exitCode);
}
}
protected String usage() {
final StringBuilder usage = new StringBuilder();
usage.append("Available commands");
if (!getName().isEmpty()) {
usage.append(" of ");
usage.append(getName());
}
usage.append(" are:\n");
usage.append("\n");
int maxLength = -1;
Map<String, Provider<Command>> m = getMap();
for (String name : m.keySet()) {
maxLength = Math.max(maxLength, name.length());
}
String format = "%-" + maxLength + "s %s";
for (String name : Sets.newTreeSet(m.keySet())) {
final Provider<Command> p = m.get(name);
usage.append(" ");
CommandMetaData meta = p.get().getClass().getAnnotation(CommandMetaData.class);
if (meta != null) {
usage.append(String.format(format, name,
Strings.nullToEmpty(meta.description())));
}
usage.append("\n");
}
usage.append("\n");
usage.append("See '");
if (getName().indexOf(' ') < 0) {
usage.append(getName());
usage.append(' ');
}
usage.append("COMMAND --help' for more information.\n");
usage.append("\n");
return usage.toString();
}
}
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