1 files changed, 84 insertions, 0 deletions
diff --git a/cmake/modules/buildtools/FindPatch.cmake b/cmake/modules/buildtools/FindPatch.cmake
new file mode 100644
index 0000000..669b4d2
--- /dev/null
+++ b/cmake/modules/buildtools/FindPatch.cmake
@@ -0,0 +1,84 @@
+#.rst:
+# FindPatch
+# ----------
+# Finds patch executable
+# Windows platforms will download patch zip from mirrors if not found.
+#
+# This will define the following variables::
+#
+# PATCH_EXECUTABLE - patch executable
+
+if(CMAKE_HOST_WIN32)
+
+  find_package(Git)
+  if(Git_FOUND)
+    get_filename_component(GIT_DIR ${GIT_EXECUTABLE} DIRECTORY)
+  endif()
+
+  find_program(PATCH_EXE NAMES patch.exe HINTS "${GIT_DIR}/.." PATH_SUFFIXES usr/bin)
+else()
+  # Freebsd patch is insufficient (too old) look for gnu patch first
+  find_program(PATCH_EXE NAMES gpatch patch)
+endif()
+
+if(CMAKE_HOST_WIN32 AND NOT PATCH_EXE)
+  # Set mirror for potential patch binary download
+  if(NOT KODI_MIRROR)
+    set(KODI_MIRROR "http://mirrors.kodi.tv")
+  endif()
+
+  set(PATCH_ARCHIVE_NAME "patch-2.7.6-bin")
+  set(PATCH_ARCHIVE "${PATCH_ARCHIVE_NAME}.zip")
+  set(PATCH_URL "${KODI_MIRROR}/build-deps/win32/${PATCH_ARCHIVE}")
+  set(PATCH_DOWNLOAD ${TARBALL_DIR}/${PATCH_ARCHIVE})
+
+  # download the archive containing patch.exe
+  message(STATUS "Downloading patch utility from ${PATCH_URL}...")
+  file(DOWNLOAD "${PATCH_URL}" "${PATCH_DOWNLOAD}" STATUS PATCH_DL_STATUS LOG PATCH_LOG SHOW_PROGRESS)
+  list(GET PATCH_DL_STATUS 0 PATCH_RETCODE)
+  if(NOT PATCH_RETCODE EQUAL 0)
+    message(FATAL_ERROR "ERROR downloading ${PATCH_URL} - status: ${PATCH_DL_STATUS} log: ${PATCH_LOG}")
+  endif()
+
+  # CORE_BUILD_DIR may not exist as yet, so create just in case
+  if(NOT EXISTS ${CMAKE_BINARY_DIR}/${CORE_BUILD_DIR})
+    file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/${CORE_BUILD_DIR})
+  endif()
+
+  # extract the archive containing patch.exe
+  execute_process(COMMAND ${CMAKE_COMMAND} -E tar xzvf ${PATCH_DOWNLOAD}
+                  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/${CORE_BUILD_DIR})
+
+  # make sure the extraction worked and that patch.exe is there
+  set(PATCH_PATH ${CMAKE_BINARY_DIR}/${CORE_BUILD_DIR}/${PATCH_ARCHIVE_NAME})
+  if(NOT EXISTS "${PATCH_PATH}/bin/patch.exe")
+    message(FATAL_ERROR "ERROR extracting patch utility from ${PATCH_PATH}")
+  endif()
+
+  # copy patch.exe into the output directory
+  file(INSTALL "${PATCH_PATH}/bin/patch.exe" DESTINATION ${CMAKE_BINARY_DIR}/${CORE_BUILD_DIR}/bin)
+  # copy patch depends
+  file(GLOB PATCH_BINARIES ${PATCH_PATH}/bin/*.dll)
+  if(NOT "${PATCH_BINARIES}" STREQUAL "")
+    file(INSTALL ${PATCH_BINARIES} DESTINATION ${CMAKE_BINARY_DIR}/${CORE_BUILD_DIR}/bin)
+  endif()
+
+  # make sure that cmake can find the copied patch.exe
+  find_program(PATCH_EXE NAMES patch.exe HINTS ${CMAKE_BINARY_DIR}/${CORE_BUILD_DIR}/bin REQUIRED)
+endif()
+
+if(PATCH_EXE)
+  execute_process(COMMAND "${PATCH_EXE}" --version
+                  OUTPUT_VARIABLE PATCH_VERSION
+                  OUTPUT_STRIP_TRAILING_WHITESPACE)
+  string(REGEX MATCH "[^\n]*patch [^\n]*" PATCH_VERSION "${PATCH_VERSION}")
+  string(REGEX REPLACE ".*patch (.*)" "\\1" PATCH_VERSION "${PATCH_VERSION}")
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Patch REQUIRED_VARS PATCH_EXE VERSION_VAR PATCH_VERSION)
+
+if(PATCH_FOUND)
+  set(PATCH_EXECUTABLE "${PATCH_EXE}")
+  mark_as_advanced(PATCH_EXE)
+endif()