git receive-pack: Use args4j to parse --reviewer and --cc names

It is cleaner to pass the email to Account.Id through an args4j option
handler than to do it with a custom conversion method.

Change-Id: Ib8c829104015223a2dbf62b7023c885f777a42a7
Signed-off-by: Shawn O. Pearce <sop@google.com>

src/main/java/com/google/gerrit/server/ssh/SshModule.java

@@ -16,6 +16,7 @@ package com.google.gerrit.server.ssh;
 
 import static com.google.inject.Scopes.SINGLETON;
 
+import com.google.gerrit.client.reviewdb.Account;
 import com.google.gerrit.client.reviewdb.PatchSet;
 import com.google.gerrit.pgm.CmdLineParser;
 import com.google.gerrit.pgm.OptionHandlerFactory;
@@ -26,6 +27,7 @@ import com.google.gerrit.server.RemotePeer;
 import com.google.gerrit.server.config.FactoryModule;
 import com.google.gerrit.server.config.GerritRequestModule;
 import com.google.gerrit.server.project.ProjectControl;
+import com.google.gerrit.server.ssh.commands.AccountIdHandler;
 import com.google.gerrit.server.ssh.commands.DefaultCommandModule;
 import com.google.gerrit.server.ssh.commands.PatchSetIdHandler;
 import com.google.gerrit.server.ssh.commands.ProjectControlHandler;
@@ -101,6 +103,7 @@ public class SshModule extends FactoryModule {
   private void configureCmdLineParser() {
     factory(CmdLineParser.Factory.class);
 
+    registerOptionHandler(Account.Id.class, AccountIdHandler.class);
     registerOptionHandler(PatchSet.Id.class, PatchSetIdHandler.class);
     registerOptionHandler(ProjectControl.class, ProjectControlHandler.class);
   }

src/main/java/com/google/gerrit/server/ssh/commands/AccountIdHandler.java

@@ -0,0 +1,64 @@
+// 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.server.ssh.commands;
+
+import com.google.gerrit.client.reviewdb.Account;
+import com.google.gerrit.server.account.AccountResolver;
+import com.google.gwtorm.client.OrmException;
+import com.google.inject.Inject;
+import com.google.inject.assistedinject.Assisted;
+
+import org.kohsuke.args4j.CmdLineException;
+import org.kohsuke.args4j.CmdLineParser;
+import org.kohsuke.args4j.OptionDef;
+import org.kohsuke.args4j.spi.OptionHandler;
+import org.kohsuke.args4j.spi.Parameters;
+import org.kohsuke.args4j.spi.Setter;
+
+public class AccountIdHandler extends OptionHandler<Account.Id> {
+  private final AccountResolver accountResolver;
+
+  @SuppressWarnings("unchecked")
+  @Inject
+  public AccountIdHandler(final AccountResolver accountResolver,
+      @Assisted final CmdLineParser parser, @Assisted final OptionDef option,
+      @Assisted final Setter setter) {
+    super(parser, option, setter);
+    this.accountResolver = accountResolver;
+  }
+
+  @Override
+  public final int parseArguments(final Parameters params)
+      throws CmdLineException {
+    final String token = params.getParameter(0);
+    final Account.Id accountId;
+    try {
+      final Account a = accountResolver.find(token);
+      if (a == null) {
+        throw new CmdLineException(owner, "\"" + token + "\" is not registered");
+      }
+      accountId = a.getId();
+    } catch (OrmException e) {
+      throw new CmdLineException(owner, "database is down");
+    }
+    setter.addValue(accountId);
+    return 1;
+  }
+
+  @Override
+  public final String getDefaultMetaVariable() {
+    return "EMAIL";
+  }
+}

src/main/java/com/google/gerrit/server/ssh/commands/Receive.java

@@ -57,7 +57,6 @@ import com.google.gwtorm.client.OrmRunnable;
 import com.google.gwtorm.client.Transaction;
 import com.google.inject.Inject;
 
-import org.kohsuke.args4j.CmdLineException;
 import org.kohsuke.args4j.Option;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -115,25 +114,13 @@ final class Receive extends AbstractGitCommand {
   private final Set<Account.Id> ccId = new HashSet<Account.Id>();
 
   @Option(name = "--reviewer", aliases = {"--re"}, multiValued = true, metaVar = "EMAIL", usage = "request reviewer for change(s)")
-  void addReviewer(final String nameOrEmail) throws CmdLineException {
-    try {
-      reviewerId.add(toAccountId(nameOrEmail));
-    } catch (NoSuchAccountException e) {
-      throw new CmdLineException(e.getMessage());
-    } catch (OrmException e) {
-      throw new CmdLineException("database is down");
-    }
+  void addReviewer(final Account.Id id) {
+    reviewerId.add(id);
   }
 
   @Option(name = "--cc", aliases = {}, multiValued = true, metaVar = "EMAIL", usage = "CC user on change(s)")
-  void addCC(final String nameOrEmail) throws CmdLineException {
-    try {
-      ccId.add(toAccountId(nameOrEmail));
-    } catch (NoSuchAccountException e) {
-      throw new CmdLineException(e.getMessage());
-    } catch (OrmException e) {
-      throw new CmdLineException("database is down");
-    }
+  void addCC(final Account.Id id) {
+    ccId.add(id);
   }
 
   @Inject