From ae7173d4d5fce0d6b037b666413a2496ff8082e8 Mon Sep 17 00:00:00 2001
From: Ivan Grokhotkov <ivan@espressif.com>
Date: Wed, 3 Nov 2021 17:23:56 +0100
Subject: [PATCH] cmake: error out of IDF version is outside of supported range

---
 CMakeLists.txt | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 895ac4213..59d1ded8e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,27 @@
+# Check ESP-IDF version and error out if it is not in the supported range.
+#
+# Note for arduino-esp32 developers: to bypass the version check locally,
+# set ARDUINO_SKIP_IDF_VERSION_CHECK environment variable to 1. For example:
+#   export ARDUINO_SKIP_IDF_VERSION_CHECK=1
+#   idf.py build
+
+set(min_supported_idf_version "4.4.0")
+set(max_supported_idf_version "4.4.99")
+set(idf_version "${IDF_VERSION_MAJOR}.${IDF_VERSION_MINOR}.${IDF_VERSION_PATCH}")
+
+if ("${idf_version}" AND NOT "$ENV{ARDUINO_SKIP_IDF_VERSION_CHECK}")
+  if (idf_version VERSION_LESS min_supported_idf_version)
+    message(FATAL_ERROR "Arduino-esp32 can be used with ESP-IDF versions "
+                        "between ${min_supported_idf_version} and ${max_supported_idf_version}, "
+                        "but an older version is detected: ${idf_version}.")
+  endif()
+  if (idf_version VERSION_GREATER max_supported_idf_version)
+    message(FATAL_ERROR "Arduino-esp32 can be used with ESP-IDF versions "
+                        "between ${min_supported_idf_version} and ${max_supported_idf_version}, "
+                        "but a newer version is detected: ${idf_version}.")
+  endif()
+endif()
+
 set(CORE_SRCS
   cores/esp32/base64.cpp
   cores/esp32/cbuf.cpp