From e1b582cb4c58e61ef7b7e44f1756ff3fa9490d8a Mon Sep 17 00:00:00 2001
From: Arniiiii <lg3dx6fd@gmail.com>
Date: Sat, 25 Jan 2025 00:06:54 +0000
Subject: [PATCH] Make CPM_DOWNLOAD_LOCATION overridable

I found that useful if you use installed/placed somewhere CPM.cmake and
want to use it.
---
 cmake/get_cpm.cmake | 33 ++++++++++++++++++---------------
 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/cmake/get_cpm.cmake b/cmake/get_cpm.cmake
index 2a9d6c03..d218c410 100644
--- a/cmake/get_cpm.cmake
+++ b/cmake/get_cpm.cmake
@@ -1,24 +1,27 @@
 # SPDX-License-Identifier: MIT
 #
 # SPDX-FileCopyrightText: Copyright (c) 2019-2023 Lars Melchior and contributors
+if(NOT DEFINED CPM_DOWNLOAD_LOCATION)
 
-set(CPM_DOWNLOAD_VERSION 1.0.0-development-version)
-set(CPM_HASH_SUM "CPM_HASH_SUM_PLACEHOLDER")
+  set(CPM_DOWNLOAD_VERSION 1.0.0-development-version)
+  set(CPM_HASH_SUM "CPM_HASH_SUM_PLACEHOLDER")
 
-if(CPM_SOURCE_CACHE)
-  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")
-else()
-  set(CPM_DOWNLOAD_LOCATION "${CMAKE_BINARY_DIR}/cmake/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
-endif()
+  if(CPM_SOURCE_CACHE)
+    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")
+  else()
+    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 (~)
+  get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
 
-# Expand relative path. This is important if the provided path contains a tilde (~)
-get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
+  file(DOWNLOAD
+       https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
+       ${CPM_DOWNLOAD_LOCATION} EXPECTED_HASH SHA256=${CPM_HASH_SUM}
+  )
 
-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}
-)
+endif()
 
 include(${CPM_DOWNLOAD_LOCATION})