Merge pull request #652 from elbeno/update-cpm

⬆️ Update CPM to v0.40.2

Author: lukevalenty

cmake/get_cpm.cmake

@@ -1,37 +1,24 @@
+# SPDX-License-Identifier: MIT
+#
+# SPDX-FileCopyrightText: Copyright (c) 2019-2023 Lars Melchior and contributors
+
 set(CPM_DOWNLOAD_VERSION 0.40.2)
+set(CPM_HASH_SUM "c8cdc32c03816538ce22781ed72964dc864b2a34a310d3b7104812a5ca2d835d")
 
 if(CPM_SOURCE_CACHE)
-    set(CPM_DOWNLOAD_LOCATION
-        "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+  set(CPM_DOWNLOAD_LOCATION "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
 elseif(DEFINED ENV{CPM_SOURCE_CACHE})
-    set(CPM_DOWNLOAD_LOCATION
-        "$ENV{CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+  set(CPM_DOWNLOAD_LOCATION "$ENV{CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
 else()
-    set(CPM_DOWNLOAD_LOCATION
-        "${CMAKE_BINARY_DIR}/cmake/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+  set(CPM_DOWNLOAD_LOCATION "${CMAKE_BINARY_DIR}/cmake/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
 endif()
 
-# Expand relative path. This is important if the provided path contains a tilde
-# (~)
+# Expand relative path. This is important if the provided path contains a tilde (~)
 get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
 
-function(download_cpm)
-    message(STATUS "Downloading CPM.cmake to ${CPM_DOWNLOAD_LOCATION}")
-    file(
-        DOWNLOAD
-        https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
-        ${CPM_DOWNLOAD_LOCATION})
-endfunction()
-
-if(NOT (EXISTS ${CPM_DOWNLOAD_LOCATION}))
-    download_cpm()
-else()
-    # resume download if it previously failed
-    file(READ ${CPM_DOWNLOAD_LOCATION} check)
-    if("${check}" STREQUAL "")
-        download_cpm()
-    endif()
-    unset(check)
-endif()
+file(DOWNLOAD
+     https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
+     ${CPM_DOWNLOAD_LOCATION} EXPECTED_HASH SHA256=${CPM_HASH_SUM}
+)
 
 include(${CPM_DOWNLOAD_LOCATION})