failure CMake with idf.py

[mmt-10]

Environment

• Core (if using chip or module): ESP32, ESP32C3
• MDF version: cf50274
• Operating System: Ubuntu on WSL

Problem Description

cmake cannot find project.cmake on examples.

$ idf.py menuconfig
Executing action: menuconfig
Running cmake in directory /home/tatsutaigu/esp/prj/mdf/master/esp32/router/build
Executing "cmake -G Ninja -DPYTHON_DEPS_CHECKED=1 -DESP_PLATFORM=1 -DIDF_TARGET=esp32 -DCCACHE_ENABLE=0 /home/tatsutaigu/esp/prj/mdf/master/esp32/router"...
CMake Error at CMakeLists.txt:8 (include):
include could not find load file:

/home/tatsutaigu/esp/prj/mdf/master/esp32/router/../../../../project.cmake

-- The C compiler identification is GNU 7.5.0
-- The CXX compiler identification is GNU 7.5.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring incomplete, errors occurred!
See also "/home/tatsutaigu/esp/prj/mdf/master/esp32/router/build/CMakeFiles/CMakeOutput.log".
cmake failed with exit code 1

Code to reproduce this issue

root cause is CMakeLists.txt as below.
$ENV{MDF_PATH must remove $.
It can run idf.py menuconfig with modified CMakeLists.txt.

--- /home/tatsutaigu/esp/esp-mdf-master/examples/function_demo/mwifi/router/CMakeLists.txt    2021-12-09 14:45:36.984505700 +0900
+++ ./CMakeLists.txt    2021-12-09 16:22:22.656280700 +0900
@@ -2,7 +2,7 @@
 # CMakeLists in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.5)

-if(NOT DEFINED $ENV{MDF_PATH})
+if(NOT DEFINED ENV{MDF_PATH})
     set(ENV{MDF_PATH} ${CMAKE_CURRENT_LIST_DIR}/../../../..)
 endif()
 include($ENV{MDF_PATH}/project.cmake)

I suggest to remove below code from CMakeLists.txt.

if(NOT DEFINED $ENV{MDF_PATH})
     set(ENV{MDF_PATH} ${CMAKE_CURRENT_LIST_DIR}/../../../..)
endif()

[tonyshuang]

您好，信件已收到。

[vitorrussi]

I made an PR fixing this issue almost 2 month ago here #253.

[mmt-10]

OK, thank you.