cmake: installation support for git

Install the built binaries and scripts using CMake

This is very similar to `make install`.
By default the destination directory(DESTDIR) is /usr/local/ on Linux
To set a custom installation path do this:
cmake `relative-path-to-srcdir`
	-DCMAKE_INSTALL_PREFIX=`preferred-install-path`

Then run `make install`

Signed-off-by: Sibi Siddharthan <sibisiddharthan.github@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/buildsystems/CMakeLists.txt

@@ -65,6 +65,8 @@ project(git
 	VERSION ${git_version}
 	LANGUAGES C)
 
+#TODO gitk git-gui gitweb
+#TODO Add pcre support
 
 #macros for parsing the Makefile for sources and scripts
 macro(parse_makefile_for_sources list_var regex)
@@ -699,3 +701,50 @@ if(MSGFMT_EXE)
 	endforeach()
 	add_custom_target(po-gen ALL DEPENDS ${po_gen})
 endif()
+
+
+#to help with the install
+list(TRANSFORM git_shell_scripts PREPEND "${CMAKE_BINARY_DIR}/")
+list(TRANSFORM git_perl_scripts PREPEND "${CMAKE_BINARY_DIR}/")
+
+#install
+install(TARGETS git git-shell
+	RUNTIME DESTINATION bin)
+install(PROGRAMS ${CMAKE_BINARY_DIR}/git-cvsserver
+	DESTINATION bin)
+
+list(REMOVE_ITEM PROGRAMS_BUILT git git-shell)
+install(TARGETS ${PROGRAMS_BUILT}
+	RUNTIME DESTINATION libexec/git-core)
+
+set(bin_links
+	git-receive-pack git-upload-archive git-upload-pack)
+
+foreach(b ${bin_links})
+install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git ${CMAKE_INSTALL_PREFIX}/bin/${b})")
+endforeach()
+
+install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git ${CMAKE_INSTALL_PREFIX}/libexec/git-core/git)")
+install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git-shell ${CMAKE_INSTALL_PREFIX}/libexec/git-core/git-shell)")
+
+foreach(b ${git_links})
+	string(REPLACE "${CMAKE_BINARY_DIR}" "" b ${b})
+	install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git ${CMAKE_INSTALL_PREFIX}/libexec/git-core/${b})")
+endforeach()
+
+foreach(b ${git_http_links})
+	string(REPLACE "${CMAKE_BINARY_DIR}" "" b ${b})
+	install(CODE "file(CREATE_LINK  ${CMAKE_INSTALL_PREFIX}/libexec/git-core/git-remote-http ${CMAKE_INSTALL_PREFIX}/libexec/git-core/${b})")
+endforeach()
+
+install(PROGRAMS ${git_shell_scripts} ${git_perl_scripts} ${CMAKE_BINARY_DIR}/git-p4
+	DESTINATION libexec/git-core)
+
+install(DIRECTORY ${CMAKE_SOURCE_DIR}/mergetools DESTINATION libexec/git-core)
+install(DIRECTORY ${CMAKE_BINARY_DIR}/perl/build/lib/ DESTINATION share/perl5
+	FILES_MATCHING PATTERN "*.pm")
+install(DIRECTORY ${CMAKE_BINARY_DIR}/templates/blt/ DESTINATION share/git-core/templates)
+
+if(MSGFMT_EXE)
+	install(DIRECTORY ${CMAKE_BINARY_DIR}/po/build/locale DESTINATION share)
+endif()