Implement support for JEnv file.

colour/__init__.py

@@ -45,11 +45,30 @@
 """
 
 import contextlib
+import json
 import os
 import sys
 
 import numpy as np
 
+# Loading the "colour-science" JEnv file.
+_JENV_FILE_PATH = os.path.join(
+    os.path.expanduser("~"),
+    ".colour-science",
+    "colour-science.jenv",
+)
+
+if os.path.exists(_JENV_FILE_PATH):
+    with open(_JENV_FILE_PATH) as _JENV_FILE:
+        for _KEY, _VALUE in json.loads(_JENV_FILE.read()).items():
+            os.environ[_KEY] = str(_VALUE)
+
+    del _JENV_FILE, _KEY, _VALUE
+
+del _JENV_FILE_PATH
+
+# ruff: noqa: E402
+
 from colour import plotting  # noqa: F401
 
 from .adaptation import (

docs/advanced.rst

@@ -30,6 +30,19 @@ runtime:
     :func:`colour.utilities.show_warning` definition and thus providing
     complete traceback from the point where the warning occurred.
 
+JEnv File
+---------
+
+**Colour** will also read the ``~/.colour-science/colour-science.jenv`` JSON
+file if it exists. The syntax is that of a mapping of environment variable and
+values as follows:
+
+.. code-block:: json
+
+    {
+      "COLOUR_SCIENCE__COLOUR__SHOW_WARNINGS_WITH_TRACEBACK": "True"
+    }
+
 Caching
 -------