command: add command "listpartitions"

Makefile.am

@@ -91,6 +91,7 @@ libmpd_a_SOURCES = \
 	src/command/OutputCommands.cxx src/command/OutputCommands.hxx \
 	src/command/MessageCommands.cxx src/command/MessageCommands.hxx \
 	src/command/ClientCommands.cxx src/command/ClientCommands.hxx \
+	src/command/PartitionCommands.cxx src/command/PartitionCommands.hxx \
 	src/command/OtherCommands.cxx src/command/OtherCommands.hxx \
 	src/command/CommandListBuilder.cxx src/command/CommandListBuilder.hxx \
 	src/Idle.cxx src/Idle.hxx \

doc/protocol.xml

@@ -2350,6 +2350,35 @@ OK
       </variablelist>
     </section>
 
+    <section id="partition_commands">
+      <title>Partition commands</title>
+
+      <para>
+        These commands allow a client to inspect and manage
+        "partitions".  A partition is one frontend of a multi-player
+        MPD process: it has separate queue, player and outputs.  A
+        client is assigned to one partition at a time.
+      </para>
+
+      <variablelist>
+        <varlistentry id="command_listpartitions">
+          <term>
+            <cmdsynopsis>
+              <command>listpartitions</command>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Print a list of partitions.  Each partition starts with
+              a <varname>partition</varname> keyword and the
+              partition's name, followed by information about the
+              partition.
+            </para>
+          </listitem>
+        </varlistentry>
+      </variablelist>
+    </section>
+
     <section id="output_commands">
       <title>Audio output devices</title>
 

src/command/AllCommands.cxx

@@ -32,6 +32,7 @@
 #include "MessageCommands.hxx"
 #include "NeighborCommands.hxx"
 #include "ClientCommands.hxx"
+#include "PartitionCommands.hxx"
 #include "OtherCommands.hxx"
 #include "Permission.hxx"
 #include "tag/Type.h"
@@ -119,6 +120,7 @@ static constexpr struct command commands[] = {
 #ifdef ENABLE_NEIGHBOR_PLUGINS
 	{ "listneighbors", PERMISSION_READ, 0, 0, handle_listneighbors },
 #endif
+	{ "listpartitions", PERMISSION_READ, 0, 0, handle_listpartitions },
 	{ "listplaylist", PERMISSION_READ, 1, 1, handle_listplaylist },
 	{ "listplaylistinfo", PERMISSION_READ, 1, 1, handle_listplaylistinfo },
 	{ "listplaylists", PERMISSION_READ, 0, 0, handle_listplaylists },

src/command/PartitionCommands.cxx

+/*
+ * Copyright 2003-2017 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "PartitionCommands.hxx"
+#include "Request.hxx"
+#include "client/Response.hxx"
+
+CommandResult
+handle_listpartitions(Client &, Request, Response &r)
+{
+	r.Write("partition: default\n");
+	return CommandResult::OK;
+}

src/command/PartitionCommands.hxx

+/*
+ * Copyright 2003-2017 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_PARTITION_COMMANDS_HXX
+#define MPD_PARTITION_COMMANDS_HXX
+
+#include "CommandResult.hxx"
+
+class Client;
+class Request;
+class Response;
+
+CommandResult
+handle_listpartitions(Client &client, Request request, Response &response);
+
+#endif