BUG: fix an incoming incompatibility with argparse (address a depreca…

…tion warning in CPython 3.14)

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+- BUG: fix an incoming incompatibility with argparse (address a deprecation
+  warning in CPython 3.14)
+
 ## [6.0.1] - 2024-12-15
 
 - DEP: require inifix 5.1.0 or newer, fix newly detected type-checking errors

src/idefix_cli/_commands/write.py

@@ -1,10 +1,9 @@
 """write an Idefix inifile from a json string"""
 
-from __future__ import annotations
-
-import argparse
 import json
 import sys
+from contextlib import ExitStack
+from io import TextIOBase
 from pathlib import Path
 
 import inifix
@@ -17,7 +16,6 @@ def add_arguments(parser) -> None:
     parser.add_argument(
         "source",
         nargs="?",
-        type=argparse.FileType("r"),
         default=sys.stdin,
         help="json input",
     )
@@ -29,12 +27,18 @@ def add_arguments(parser) -> None:
     )
 
 
-def command(dest: str, source, force: bool = False) -> int:
-    try:
-        data = json.load(source)
-    except json.decoder.JSONDecodeError:
-        print_error("input is not valid json.")
-        return 1
+def command(dest: str, source: str | TextIOBase, force: bool = False) -> int:
+    with ExitStack() as stack:
+        if isinstance(source, TextIOBase):
+            stream = source
+        else:
+            stream = stack.enter_context(open(source))
+
+        try:
+            data = json.load(stream)
+        except json.decoder.JSONDecodeError:
+            print_error("input is not valid json.")
+            return 1
 
     try:
         inifix.validate_inifile_schema(data, sections="require")