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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.text.MessageFormat;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.sshd.server.Command;
import org.apache.sshd.server.Environment;
import org.kohsuke.args4j.Argument;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.gitblit.git.GitblitReceivePackFactory;
import com.gitblit.git.GitblitUploadPackFactory;
import com.gitblit.git.RepositoryResolver;
import com.gitblit.models.UserModel;
import com.gitblit.transport.ssh.CommandMetaData;
import com.gitblit.transport.ssh.CachingPublicKeyAuthenticator;
import com.gitblit.transport.ssh.SshDaemonClient;
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 {
private Logger log = LoggerFactory.getLogger(getClass());
@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<Class<? extends Command>> commands;
private Map<String, Class<? extends Command>> map;
private Map<String, Command> root;
public DispatchCommand() {
commands = new HashSet<Class<? extends Command>>();
}
public void registerDispatcher(String name, Command cmd) {
if (root == null) {
root = Maps.newHashMap();
}
root.put(name, cmd);
}
/**
* Registers a command as long as the user is permitted to execute it.
*
* @param user
* @param cmd
*/
public void registerCommand(UserModel user, Class<? extends Command> cmd) {
if (!cmd.isAnnotationPresent(CommandMetaData.class)) {
throw new RuntimeException(MessageFormat.format("{0} must be annotated with {1}!", cmd.getName(),
CommandMetaData.class.getName()));
}
CommandMetaData meta = cmd.getAnnotation(CommandMetaData.class);
if (meta.admin() && user != null && user.canAdmin()) {
log.debug(MessageFormat.format("excluding admin command {0} for {1}", meta.name(), user.username));
return;
}
commands.add(cmd);
}
private Map<String, Class<? extends Command>> getMap() {
if (map == null) {
map = Maps.newHashMapWithExpectedSize(commands.size());
for (Class<? extends Command> cmd : commands) {
CommandMetaData meta = cmd.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());
}
Command cmd = getCommand();
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()]));
}
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);
}
}
private Command getCommand() throws UnloggedFailure {
if (root != null && root.containsKey(commandName)) {
return root.get(commandName);
}
final Class<? extends Command> c = getMap().get(commandName);
if (c == null) {
String msg = (getName().isEmpty() ? "Gitblit" : getName()) + ": " + commandName + ": not found";
throw new UnloggedFailure(1, msg);
}
Command cmd = null;
try {
cmd = c.newInstance();
} catch (Exception e) {
throw new UnloggedFailure(1, MessageFormat.format("Failed to instantiate {0} command", commandName));
}
return cmd;
}
@Override
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, Class<? extends 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 Class<? extends Command> c = m.get(name);
CommandMetaData meta = c.getAnnotation(CommandMetaData.class);
if (meta != null) {
if (meta.hidden()) {
continue;
}
usage.append(" ");
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();
}
protected void provideStateTo(final Command cmd) {
if (cmd instanceof BaseCommand) {
((BaseCommand) cmd).setContext(ctx);
}
cmd.setInputStream(in);
cmd.setOutputStream(out);
cmd.setErrorStream(err);
cmd.setExitCallback(exit);
if (cmd instanceof BaseGitCommand) {
BaseGitCommand a = (BaseGitCommand) cmd;
a.setRepositoryResolver(repositoryResolver);
a.setUploadPackFactory(gitblitUploadPackFactory);
a.setReceivePackFactory(gitblitReceivePackFactory);
} else if (cmd instanceof DispatchCommand) {
DispatchCommand d = (DispatchCommand) cmd;
d.setRepositoryResolver(repositoryResolver);
d.setUploadPackFactory(gitblitUploadPackFactory);
d.setReceivePackFactory(gitblitReceivePackFactory);
d.setAuthenticator(authenticator);
} else if (cmd instanceof BaseKeyCommand) {
BaseKeyCommand k = (BaseKeyCommand) cmd;
k.setAuthenticator(authenticator);
}
}
private RepositoryResolver<SshDaemonClient> repositoryResolver;
public void setRepositoryResolver(RepositoryResolver<SshDaemonClient> repositoryResolver) {
this.repositoryResolver = repositoryResolver;
}
private GitblitUploadPackFactory<SshDaemonClient> gitblitUploadPackFactory;
public void setUploadPackFactory(GitblitUploadPackFactory<SshDaemonClient> gitblitUploadPackFactory) {
this.gitblitUploadPackFactory = gitblitUploadPackFactory;
}
private GitblitReceivePackFactory<SshDaemonClient> gitblitReceivePackFactory;
public void setReceivePackFactory(GitblitReceivePackFactory<SshDaemonClient> gitblitReceivePackFactory) {
this.gitblitReceivePackFactory = gitblitReceivePackFactory;
}
private CachingPublicKeyAuthenticator authenticator;
public void setAuthenticator(CachingPublicKeyAuthenticator authenticator) {
this.authenticator = authenticator;
}
}
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