Run cmake-init and setup flake.nix and default.nix

cmake/variables.cmake

@@ -0,0 +1,28 @@
+# ---- Developer mode ----
+
+# Developer mode enables targets and code paths in the CMake scripts that are
+# only relevant for the developer(s) of ec-controller
+# Targets necessary to build the project must be provided unconditionally, so
+# consumers can trivially build and package the project
+if(PROJECT_IS_TOP_LEVEL)
+  option(ec-controller_DEVELOPER_MODE "Enable developer mode" OFF)
+endif()
+
+# ---- Warning guard ----
+
+# target_include_directories with the SYSTEM modifier will request the compiler
+# to omit warnings from the provided paths, if the compiler supports that
+# This is to provide a user experience similar to find_package when
+# add_subdirectory or FetchContent is used to consume this project
+set(warning_guard "")
+if(NOT PROJECT_IS_TOP_LEVEL)
+  option(
+      ec-controller_INCLUDES_WITH_SYSTEM
+      "Use SYSTEM modifier for ec-controller's includes, disabling warnings"
+      ON
+  )
+  mark_as_advanced(ec-controller_INCLUDES_WITH_SYSTEM)
+  if(ec-controller_INCLUDES_WITH_SYSTEM)
+    set(warning_guard SYSTEM)
+  endif()
+endif()