1 files changed, 56 insertions, 0 deletions
diff --git a/CMakePlugins.cmake b/CMakePlugins.cmake
new file mode 100644
index 0000000..16fb874
--- /dev/null
+++ b/CMakePlugins.cmake
@@ -0,0 +1,56 @@
+#
+# Copyright by The HDF Group.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the COPYING file, which can be found at the root of the source code
+# distribution tree, or in https://www.hdfgroup.org/licenses.
+# If you do not have access to either file, you may request a copy from
+# help@hdfgroup.org.
+#
+
+include (ExternalProject)
+#option (HDF5_ALLOW_EXTERNAL_SUPPORT "Allow External Library Building (NO GIT TGZ)" "NO")
+set (HDF5_ALLOW_EXTERNAL_SUPPORT "NO" CACHE STRING "Allow External Library Building (NO GIT TGZ)")
+set_property (CACHE HDF5_ALLOW_EXTERNAL_SUPPORT PROPERTY STRINGS NO GIT TGZ)
+if (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "GIT" OR HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "TGZ")
+  option (PLUGIN_USE_EXTERNAL "Use External Library Building for filter PLUGIN" 1)
+  if (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "GIT")
+    set (PLUGIN_URL ${PLUGIN_GIT_URL} CACHE STRING "Path to PLUGIN git repository")
+    set (PLUGIN_BRANCH ${PLUGIN_GIT_BRANCH})
+  elseif (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "TGZ")
+    if (NOT TGZPATH)
+      set (TGZPATH ${HDF5_SOURCE_DIR})
+    endif ()
+    set (PLUGIN_URL ${TGZPATH}/${PLUGIN_TGZ_NAME})
+    if (NOT EXISTS "${PLUGIN_URL}")
+      set (HDF5_ENABLE_PLUGIN_SUPPORT OFF CACHE BOOL "" FORCE)
+      message (STATUS "Filter PLUGIN file ${PLUGIN_URL} not found")
+    endif ()
+  else ()
+    set (PLUGIN_USE_EXTERNAL 0)
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option for PLUGIN support
+#-----------------------------------------------------------------------------
+option (HDF5_ENABLE_PLUGIN_SUPPORT "Enable PLUGIN Filters" OFF)
+if (HDF5_ENABLE_PLUGIN_SUPPORT)
+  if (NOT PLUGIN_USE_EXTERNAL)
+    find_package (PLUGIN NAMES ${PLUGIN_PACKAGE_NAME}${HDF_PACKAGE_EXT})
+    if (NOT PLUGIN_FOUND)
+      find_package (PLUGIN) # Legacy find
+    endif ()
+  endif ()
+  if (NOT PLUGIN_FOUND)
+    if (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "GIT" OR HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "TGZ")
+      EXTERNAL_PLUGIN_LIBRARY (${HDF5_ALLOW_EXTERNAL_SUPPORT})
+      message (STATUS "Filter PLUGIN is built")
+    else ()
+      message (FATAL_ERROR " PLUGIN is Required for PLUGIN support in HDF5")
+    endif ()
+  endif ()
+  message (STATUS "Filter PLUGIN is ON")
+endif ()