docs: add additional field 'fromfile' for options in the help-all goal output

src/python/pants/help/help_formatter_test.py

@@ -34,6 +34,7 @@ def _format_for_single_option(**kwargs):
             choices=None,
             comma_separated_choices=None,
             value_history=OptionValueHistory((RankedValue(Rank.HARDCODED, None),)),
+            fromfile=False,
         )
         ohi = replace(ohi, **kwargs)
         lines = HelpFormatter(

src/python/pants/help/help_info_extracter.py

@@ -96,6 +96,7 @@ class OptionHelpInfo:
     removal_version: If deprecated: The version at which this option is to be removed.
     removal_hint: If deprecated: The removal hint message registered for this option.
     choices: If this option has a constrained set of choices, a tuple of the stringified choices.
+    fromfile: Supports reading the option value from a file when using `@filepath`.
     """
 
     display_args: tuple[str, ...]
@@ -115,6 +116,7 @@ class OptionHelpInfo:
     choices: tuple[str, ...] | None
     comma_separated_choices: str | None
     value_history: OptionValueHistory | None
+    fromfile: bool
 
 
 @dataclass(frozen=True)
@@ -973,6 +975,7 @@ def get_option_help_info(self, args, kwargs):
 
         target_field_name = f"{self._scope_prefix}_{option_field_name_for(args)}".replace("-", "_")
         environment_aware = kwargs.get("environment_aware") is True
+        fromfile = kwargs.get("fromfile", False)
 
         ret = OptionHelpInfo(
             display_args=tuple(display_args),
@@ -992,5 +995,6 @@ def get_option_help_info(self, args, kwargs):
             choices=choices,
             comma_separated_choices=None if choices is None else ", ".join(choices),
             value_history=None,
+            fromfile=fromfile,
         )
         return ret

src/python/pants/help/help_info_extracter_test.py

@@ -323,6 +323,7 @@ def fake_consumed_scopes_mapper(scope: str) -> Tuple[str, ...]:
                         },
                         "typ": int,
                         "default": 42,
+                        "fromfile": False,
                         "help": "Option 1",
                         "deprecation_active": False,
                         "deprecated_message": None,
@@ -347,6 +348,7 @@ def fake_consumed_scopes_mapper(scope: str) -> Tuple[str, ...]:
                         },
                         "typ": LogLevel,
                         "default": LogLevel.INFO,
+                        "fromfile": False,
                         "help": "Set the logging level.",
                         "deprecation_active": False,
                         "deprecated_message": None,
@@ -366,6 +368,7 @@ def fake_consumed_scopes_mapper(scope: str) -> Tuple[str, ...]:
                         "deprecation_active": False,
                         "display_args": ("--backend-packages=\"['<str>', '<str>', ...]\"",),
                         "env_var": "PANTS_BACKEND_PACKAGES",
+                        "fromfile": False,
                         "help": "",
                         "removal_hint": None,
                         "removal_version": None,
@@ -395,6 +398,7 @@ def fake_consumed_scopes_mapper(scope: str) -> Tuple[str, ...]:
                         "deprecation_active": False,
                         "display_args": ("--pythonpath=\"['<str>', '<str>', ...]\"",),
                         "env_var": "PANTS_PYTHONPATH",
+                        "fromfile": False,
                         "help": "",
                         "removal_hint": None,
                         "removal_version": None,
@@ -440,6 +444,7 @@ def fake_consumed_scopes_mapper(scope: str) -> Tuple[str, ...]:
                         },
                         "typ": bool,
                         "default": True,
+                        "fromfile": False,
                         "help": "Option 2",
                         "deprecation_active": False,
                         "deprecated_message": None,