change a few buld configurations

- stop building voxelands.icns everytime while doing mac builds.

- give build option to build icns if the logo changes in the future.

- include an appdata file on install (used mostly in GNOME and KDE software
  installers to showcase applications.)

CMakeLists.txt

@@ -30,6 +30,9 @@ else()
 	set(BUILD_SERVER 1 CACHE BOOL "Build server")
 endif()
 
+# conf options for building fresh voxelands.icns from voxelands.svg if a new icon is made.
+set(REBUILD_ICNS 0 CACHE BOOL "Rebuild icns from voxelands.svg .")
+
 set(CPU_OPTS 0 CACHE BOOL "Enable CPU optimizations")
 
 if(NOT CMAKE_BUILD_TYPE)
@@ -67,6 +70,7 @@ elseif(UNIX) # Linux, BSD etc
         set(MANDIR "share/man")
         set(EXAMPLE_CONF_DIR ${DOCDIR})
         set(XDG_APPS_DIR "share/applications")
+        set(APPDATADIR "share/appdata")
         set(ICONDIR "share/icons")
         set(LOCALEDIR "share/${PROJECT_NAME}/locale")
     else()
@@ -76,6 +80,7 @@ elseif(UNIX) # Linux, BSD etc
         set(MANDIR "${CMAKE_INSTALL_PREFIX}/share/man")
         set(EXAMPLE_CONF_DIR ${DOCDIR})
         set(XDG_APPS_DIR "${CMAKE_INSTALL_PREFIX}/share/applications")
+        set(APPDATADIR "${CMAKE_INSTALL_PREFIX}/share/appdata")
         set(ICONDIR "${CMAKE_INSTALL_PREFIX}/share/icons")
         set(LOCALEDIR "${CMAKE_INSTALL_PREFIX}/share/${PROJECT_NAME}/locale")
     endif()
@@ -90,6 +95,7 @@ endif()
 if (UNIX AND NOT APPLE)
     install(FILES "doc/voxelands.6" "doc/voxelands-server.6" DESTINATION "${MANDIR}/man6")
     install(FILES "misc/freedesktop/voxelands.desktop" DESTINATION "${XDG_APPS_DIR}")
+    install(FILES "misc/voxelands.appdata.xml" DESTINATION "${APPDATADIR}")
     install(FILES "misc/freedesktop/icons/scalable/apps/voxelands.svg" DESTINATION "${ICONDIR}/hicolor/scalable/apps")
     install(FILES "misc/freedesktop/icons/192x192/apps/voxelands.png" DESTINATION "${ICONDIR}/hicolor/192x192/apps")
     install(FILES "misc/freedesktop/icons/128x128/apps/voxelands.png" DESTINATION "${ICONDIR}/hicolor/128x128/apps")

misc/voxelands.appdata.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop">
+  <id>voxelands.desktop</id>
+  <name>Voxelands</name>
+  <summary>The Fun-Focused Free Software Voxel World Game</summary>
+  <developer_name>Lisa "darkrose" Milne</developer_name>
+  <description>
+    <p>
+        Voxelands is a sandbox construction game based on Minetest, which 
+        was inspired by earlier "voxel world" games such as Infiniminer.
+    </p>
+    <p>
+        Gameplay puts players in a fully destructible 3D game world where 
+        they can place and dig numerous types of blocks, items and creatures 
+        using a variety of tools. Inside the game world players can build 
+        structures, artworks and anything else their creativity can think of
+        on multiplayer servers and singleplayer worlds across multiple game
+        modes.
+    </p>
+  </description>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-3.0 and CC-BY-SA-3.0 and MIT</project_license>
+  <url type="bugtracker">http://forum.voxelands.com/viewforum.php?id=7</url>
+  <url type="donation">https://www.patreon.com/voxelands</url>
+  <url type="faq">http://forum.voxelands.com/viewforum.php?id=6</url>
+  <url type="help">http://forum.voxelands.com/viewforum.php?id=8</url>
+  <url type="homepage">http://www.voxelands.com/</url>
+  <project_group>none</project_group>
+  <screenshots>
+    <screenshot type="default">
+      <caption>Voxelands Character Creator</caption>
+      <image height="891" width="1584">http://www.voxelands.com/images/screenshot1.jpg</image>
+    </screenshot>
+    <screenshot>
+      <image height="891" width="1584">http://www.voxelands.com/images/screenshot2.jpg</image>
+    </screenshot>
+  </screenshots>
+  <updatecontact>darkrose_at_voxelands.com</updatecontact>
+</component>

src/CMakeLists.txt

@@ -496,10 +496,13 @@ if(BUILD_CLIENT)
 				${CMAKE_SOURCE_DIR}/misc/mac/${xib}.xib
 				COMMENT "Compiling ${CMAKE_SOURCE_DIR}/${xib}.xib")
 		endforeach()
-        # Make icns from svg, just in case it was updated
-        add_custom_command (TARGET ${PROJECT_NAME} POST_BUILD
+        # Make icns from svg, just in case it was updated. Only rebuild from svg when asked.
+        # Most times use voxelands.icns from binary blob instead.
+        if(REBUILD_ICNS)
+            add_custom_command (TARGET ${PROJECT_NAME} POST_BUILD
                 COMMAND ${CMAKE_SOURCE_DIR}/misc/mac/makeicns.sh
-                COMMENT "making ${PROJECT_NAME}.icns file from ${PROJECT_NAME}.svg")
+                    COMMENT "making ${PROJECT_NAME}.icns file from ${PROJECT_NAME}.svg")
+        endif()
         # Change to proper version and mac osx deployment version
         add_custom_command (TARGET ${PROJECT_NAME} POST_BUILD
             COMMAND ${CMAKE_SOURCE_DIR}/misc/mac/makeplist.sh ${VERSION_STRING}