Fixed inconsistent ARG: and missing ENV: in help when default_env=True.

CHANGELOG.rst

@@ -20,6 +20,7 @@ Fixed
 - Invalid environment variable names when ``env_prefix`` is derived from
   a ``prog`` containing dashes.
 - Pylance unable to resolve types from ``jsonargparse.typing``.
+- Inconsistent ``ARG:`` and missing ``ENV:`` in help when ``default_env=True``.
 
 
 v4.22.1 (2023-07-07)

jsonargparse/_formatters.py

@@ -17,6 +17,8 @@
     ActionConfigFile,
     ActionYesNo,
     _ActionConfigLoad,
+    _ActionHelpClassPath,
+    _ActionPrintConfig,
     _ActionSubCommands,
     _find_action,
     filter_default_actions,
@@ -97,10 +99,10 @@ def _format_usage(self, *args, **kwargs) -> str:
 
     def _format_action_invocation(self, action: Action) -> str:
         parser = parent_parser.get()
-        if action.option_strings == [] or action.default == SUPPRESS or not parser.default_env:
+        if not (parser.default_env and action.option_strings):
             return super()._format_action_invocation(action)
         extr = ""
-        if parser.default_env:
+        if not isinstance(action, (_ActionHelpClassPath, _ActionPrintConfig, _HelpAction)):
             extr += "\n  ENV:   " + get_env_var(self, action)
         return "ARG:   " + super()._format_action_invocation(action) + extr
 

jsonargparse_tests/test_formatters.py

@@ -14,13 +14,20 @@ def parser() -> ArgumentParser:
     return ArgumentParser(prog="app", default_env=True)
 
 
+def test_help_basics(parser):
+    help_str = get_parser_help(parser)
+    assert "ARG:   -h, --help" in help_str
+    assert "APP_HELP" not in help_str
+
+
 def test_help_action_config_file(parser):
     parser.add_argument("-c", "--cfg", help="Config in yaml/json.", action=ActionConfigFile)
     help_str = get_parser_help(parser)
-    assert "--print_config" in help_str
+    assert "ARG:   --print_config" in help_str
     assert "ARG:   -c CFG, --cfg CFG" in help_str
     assert "ENV:   APP_CFG" in help_str
     assert "Config in yaml/json." in help_str
+    assert "APP_PRINT_CONFIG" not in help_str
 
 
 def test_help_required_and_default(parser):

jsonargparse_tests/test_signatures.py

@@ -164,6 +164,17 @@ def test_add_class_with_default(parser):
     assert defaults == Namespace(cls=Namespace(p1=2, p2="-"))
 
 
+def test_add_class_env_help(parser):
+    parser.env_prefix = "APP"
+    parser.default_env = True
+    parser.add_class_arguments(WithDefault, "cls")
+    help_str = get_parser_help(parser)
+    assert "ARG:   --cls CONFIG" in help_str
+    assert "ARG:   --cls.p1 P1" in help_str
+    assert "ENV:   APP_CLS\n" in help_str
+    assert "ENV:   APP_CLS__P1" in help_str
+
+
 class NoParams:
     pass
 

jsonargparse_tests/test_subclasses.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import json
+import os
 import textwrap
 import warnings
 from calendar import Calendar, HTMLCalendar, January, TextCalendar  # type: ignore
@@ -9,6 +10,7 @@
 from gzip import GzipFile
 from pathlib import Path
 from typing import Any, Dict, Iterable, List, Mapping, Optional, Union
+from unittest.mock import patch
 
 import pytest
 import yaml
@@ -324,6 +326,30 @@ def test_subclass_in_subcommand_with_global_default_config_file(parser, subparse
     assert cfg.fit.model.foo == 123
 
 
+# environment tests
+
+
+def test_subclass_env_help(parser):
+    parser.env_prefix = "APP"
+    parser.default_env = True
+    parser.add_argument("--cal", type=Calendar)
+    help_str = get_parser_help(parser)
+    assert "ARG:   --cal CAL" in help_str
+    assert "ARG:   --cal.help" in help_str
+    assert "ENV:   APP_CAL" in help_str
+    assert "APP_CAL_HELP" not in help_str
+
+
+def test_subclass_env_config(parser):
+    parser.env_prefix = "APP"
+    parser.default_env = True
+    parser.add_argument("--cal", type=Calendar)
+    env = {"APP_CAL": "{'class_path': 'TextCalendar', 'init_args': {'firstweekday': 4}}"}
+    with patch.dict(os.environ, env):
+        cfg = parser.parse_env()
+    assert cfg.cal == Namespace(class_path="calendar.TextCalendar", init_args=Namespace(firstweekday=4))
+
+
 # nested subclass tests