Replace the "tarball" CMake target with CPack

Related to #135

.gitignore

@@ -7,6 +7,7 @@ config.h
 *.ddeb
 *.swp
 .fuse*
+cmake-build-*/
 CMakeCache.txt
 CMakeFiles/
 CPackConfig.cmake

CMakeLists.txt

@@ -419,12 +419,19 @@ else()
 set(CPACK_DEBIAN_DEVEL_PACKAGE_DEPENDS "${CPACK_PACKAGE_NAME} (= ${PROJECT_VERSION})")
 endif()
 
+set(CPACK_SOURCE_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${PROJECT_VERSION}")
+set(CPACK_SOURCE_IGNORE_FILES
+  "cmake-build-*"
+  ".github/"
+  ".git/"
+  ".*.swp"
+)
+set(CPACK_SOURCE_GENERATOR "TXZ")
+
 set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Mark Heily <[email protected]>")
 set(CPACK_DEBIAN_PACKAGE_HOMEPAGE "https://github.com/mheily/libkqueue")
 include(CPack)
 
-add_custom_target(tarball git archive -o "libkqueue-${PROJECT_VERSION}.tar.gz" --prefix "libkqueue-${PROJECT_VERSION}/" HEAD)
-
 #
 #  Ensure variables which represent arguments are not
 #  cached. This provides more of a sane interface where

README.md

@@ -78,6 +78,14 @@ Xcode (project)
 
     cmake -G "Xcode" <path to source>
 
+Source archive
+--------------
+
+    mkdir -p cmake-build-source
+    cd cmake-build-source
+    cmake ..
+    make package_source
+
 Running Unit Tests
 ------------------