Add defs generator.

cmake/modules/envtoh.cmake

@@ -0,0 +1,69 @@
+if(NOT DEFINED ENV_FILE)
+    message(FATAL_ERROR "ENV_FILE is not set")
+endif()
+
+if(NOT DEFINED OUT_HEADER)
+    message(FATAL_ERROR "OUT_HEADER is not set")
+endif()
+
+if(NOT EXISTS "${ENV_FILE}")
+    message(FATAL_ERROR ".env file not found: ${ENV_FILE}")
+endif()
+
+file(STRINGS "${ENV_FILE}" ENV_LINES)
+
+set(HEADER_CONTENT "#pragma once\n#include \"dusk.h\"\n\n")
+
+foreach(line IN LISTS ENV_LINES)
+  # Trim whitespace
+  string(REGEX REPLACE "^[ \t]*" "" line "${line}")
+  string(REGEX REPLACE "[ \t]*$" "" line "${line}")
+
+  # Skip comments and empty lines (allow whitespace before # or ;)
+  if(line STREQUAL "" OR line MATCHES "^[ \t]*[#;]")
+    continue()
+  endif()
+
+  # Expect KEY=VALUE
+  if(NOT line MATCHES "^[A-Za-z_][A-Za-z0-9_]*=")
+    message(WARNING "Skipping invalid line in ${ENV_FILE}: '${line}'")
+    continue()
+  endif()
+
+  # Extract key
+  string(REGEX MATCH "^[A-Za-z_][A-Za-z0-9_]*" KEY "${line}")
+  string(LENGTH "${KEY}" key_len)
+
+  # Extract value
+  string(SUBSTRING "${line}" ${key_len} -1 rest)
+  string(REGEX REPLACE "^[ \t]*=[ \t]*" "" RAW_VALUE "${rest}")
+
+  # Lowercase copy for boolean detection
+  string(TOLOWER "${RAW_VALUE}" VALUE_LC)
+  set(VALUE "${RAW_VALUE}")
+
+  # Determine type and format accordingly
+  if(VALUE_LC STREQUAL "true")
+    set(HEADER_CONTENT "${HEADER_CONTENT}#define ${KEY} true\n")
+
+  elseif(VALUE_LC STREQUAL "false")
+    set(HEADER_CONTENT "${HEADER_CONTENT}#define ${KEY} false\n")
+
+  elseif(VALUE MATCHES "^[+-]?[0-9]+$")
+    # Integer
+    set(HEADER_CONTENT "${HEADER_CONTENT}#define ${KEY} ${VALUE}\n")
+
+  elseif(VALUE MATCHES "^[+-]?[0-9]*\\.[0-9]+$")
+    # Float → append "f"
+    set(HEADER_CONTENT "${HEADER_CONTENT}#define ${KEY} ${VALUE}f\n")
+
+  else()
+    # String → escape for C literal
+    string(REPLACE "\\" "\\\\" VALUE_ESC "${VALUE}")
+    string(REPLACE "\"" "\\\"" VALUE_ESC "${VALUE_ESC}")
+    set(HEADER_CONTENT "${HEADER_CONTENT}#define ${KEY} \"${VALUE_ESC}\"\n")
+  endif()
+endforeach()
+
+file(WRITE "${OUT_HEADER}" "${HEADER_CONTENT}")
+message(STATUS "Generated header: ${OUT_HEADER}")