javascript: add new plugin to run javascript scripts in WeeChat

This plugin was originally written by Koka El Kiwi
(repository: https://github.com/KokaKiwi/weechat-js-plugin).

This plugin uses Google V8 engine to execute JS scripts.

cmake/FindV8.cmake

@@ -0,0 +1,49 @@
+#
+# Copyright (C) 2015 Sébastien Helleu <flashcode@flashtux.org>
+#
+# This file is part of WeeChat, the extensible chat client.
+#
+# WeeChat 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 3 of the License, or
+# (at your option) any later version.
+#
+# WeeChat 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 WeeChat.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# - Find Aspell
+# This module finds if libaspell is installed and determines where
+# the include files and libraries are.
+#
+# This code sets the following variables:
+#
+#  V8_INCLUDE_DIR = path to where v8.h can be found
+#  V8_LIBRARY = path to where libv8.so* can be found
+
+if(V8_FOUND)
+  # Already in cache, be silent
+  SET(V8_FIND_QUIETLY TRUE)
+endif()
+
+set(V8_INC_PATHS
+  /usr/include
+  ${CMAKE_INCLUDE_PATH}
+)
+find_path(V8_INCLUDE_DIR v8.h PATHS ${V8_INC_PATHS})
+find_library(V8_LIBRARY
+  NAMES v8
+  PATHS /lib /usr/lib /usr/local/lib /usr/pkg/lib
+)
+
+find_package_handle_standard_args(V8 DEFAULT_MSG V8_LIBRARY V8_INCLUDE_DIR)
+
+mark_as_advanced(
+  V8_INCLUDE_DIR
+  V8_LIBRARY
+)