[chrome-gnome-shell] cmake: added debian package build step

[Yuri Konotopov <ykonotopov src gnome org>]

commit 58d6694b3e2daf4846e90ea874b9e54fa1eb5cc7
Author: Yuri Konotopov <ykonotopov gmail com>
Date:   Sun Mar 13 02:10:23 2016 +0300

    cmake: added debian package build step

 CMakeLists.txt           |   50 +++++++++++++++++++++++++++++++++++++++++++++-
 contrib/ubuntu/changelog |    2 +-
 2 files changed, 50 insertions(+), 2 deletions(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 40e0aef..f7da847 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,14 +5,25 @@ set(PROJECT_VERSION "5.1")
 
 set(ARCHIVE_NAME ${CMAKE_PROJECT_NAME}-${PROJECT_VERSION})
 set(ARCHIVE_FULL_NAME ${ARCHIVE_NAME}.tar.xz)
+set(ARCHIVE_DEB_NAME ${CMAKE_PROJECT_NAME}_${PROJECT_VERSION}.orig.tar.xz)
+set(DEB_DIR ${CMAKE_CURRENT_BINARY_DIR}/deb)
 
 option(BUILD_EXTENSION "Build extension zip package"   TRUE)
 option(BUILD_CONNECTOR "Build native messaging host"   TRUE)
+option(BUILD_DEB       "Build debian package"          FALSE)
 
 if(NOT DEFINED(EXTENSION_ID))
        set(EXTENSION_ID "gphhapmejobijbbhgpjhcjognlahblep")
 endif(NOT DEFINED(EXTENSION_ID))
 
+if(NOT DEFINED(DEBIAN_VERSION))
+       set(DEBIAN_VERSION "0ubuntu1")
+endif(NOT DEFINED(DEBIAN_VERSION))
+
+if(NOT DEFINED(DEBIAN_DISTRO))
+       set(DEBIAN_DISTRO "trusty")
+endif(NOT DEFINED(DEBIAN_DISTRO))
+
 # Suppress warning
 if(NOT DEFINED(CMAKE_SIZEOF_VOID_P))
        set(CMAKE_SIZEOF_VOID_P 8)
@@ -53,5 +64,42 @@ if(XZ)
                COMMAND git archive --prefix=${ARCHIVE_NAME}/ HEAD | ${XZ} -z > 
${CMAKE_BINARY_DIR}/${ARCHIVE_FULL_NAME}
                WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
 else(XZ)
-       message(WARNING "XZ utils not found. Dist target will not be generated.")
+       if(BUILD_DEB)
+               message(FATAL_ERROR "XZ utils not found.")
+       else(BUILD_DEB)
+               message(WARNING "XZ utils not found. Dist target will not be generated.")
+       endif(BUILD_DEB)
 endif(XZ)
+
+if(BUILD_DEB)
+       find_program(DEBUILD debuild)
+       find_program(TAR tar)
+
+       if(NOT DEBUILD)
+               message(FATAL_ERROR "Debuild not found.")
+       endif(NOT DEBUILD)
+
+       if(NOT TAR)
+               message(FATAL_ERROR "Tar not found.")
+       endif(NOT TAR)
+
+       if(GPG_KEY)
+               set(DEBUILD_KEY "-k${GPG_KEY}")
+       endif(GPG_KEY)
+
+       configure_file("${CMAKE_CURRENT_SOURCE_DIR}/contrib/ubuntu/changelog"
+                       "${CMAKE_BINARY_DIR}/debian_changelog")
+
+       add_custom_target(deb_prepare
+               DEPENDS dist
+               COMMAND ${CMAKE_COMMAND} -E make_directory "${DEB_DIR}/${ARCHIVE_NAME}"
+               COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_CURRENT_BINARY_DIR}/${ARCHIVE_FULL_NAME}" 
"${DEB_DIR}/${ARCHIVE_DEB_NAME}"
+               COMMAND ${TAR} -xvf "${DEB_DIR}/${ARCHIVE_DEB_NAME}" -C "${DEB_DIR}/${ARCHIVE_NAME}" 
--strip-components=1)
+
+       add_custom_target(deb ALL
+               DEPENDS deb_prepare
+               COMMAND ${CMAKE_COMMAND} -E copy_directory "${CMAKE_CURRENT_SOURCE_DIR}/contrib/ubuntu" 
"${DEB_DIR}/${ARCHIVE_NAME}/debian"
+               COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_BINARY_DIR}/debian_changelog" 
"${DEB_DIR}/${ARCHIVE_NAME}/debian/changelog"
+               COMMAND ${DEBUILD} -S ${DEBUILD_KEY}
+               WORKING_DIRECTORY ${DEB_DIR}/${ARCHIVE_NAME})
+endif(BUILD_DEB)
diff --git a/contrib/ubuntu/changelog b/contrib/ubuntu/changelog
index c3eef49..f006d90 100644
--- a/contrib/ubuntu/changelog
+++ b/contrib/ubuntu/changelog
@@ -1,4 +1,4 @@
-chrome-gnome-shell (5.1.1-0ubuntu2) trusty; urgency=low
+chrome-gnome-shell (${PROJECT_VERSION}-${DEBIAN_VERSION}) ${DEBIAN_DISTRO}; urgency=low
 
   * Initial release