Make help-all dump a JSON blob containing all help info.

src/python/pants/help/help_integration_test.py

@@ -34,7 +34,7 @@ def test_help_all(self):
         assert "--pytest-version" in pants_run.stdout_data
 
     def test_help_all_advanced(self):
-        command = ["--help-all", "--help-advanced"]
+        command = ["help-all", "--help-advanced"]
         pants_run = self.run_pants(command=command)
         self.assert_success(pants_run)
         # Spot check to see that scope headings are printed even for advanced options

src/python/pants/help/help_printer.py

@@ -1,8 +1,11 @@
 # Copyright 2015 Pants project contributors (see CONTRIBUTORS.md).
 # Licensed under the Apache License, Version 2.0 (see LICENSE).
 
+import dataclasses
+import json
 import sys
 import textwrap
+from enum import Enum
 from typing import Dict, cast
 
 from colors import cyan, green
@@ -12,6 +15,7 @@
 from pants.help.help_formatter import HelpFormatter
 from pants.help.help_info_extracter import AllHelpInfo
 from pants.option.arg_splitter import (
+    AllHelp,
     GoalsHelp,
     HelpRequest,
     NoGoalHelp,
@@ -42,10 +46,12 @@ def print_hint() -> None:
 
         if isinstance(self._help_request, VersionHelp):
             print(pants_version())
-        elif isinstance(self._help_request, OptionsHelp):
-            self._print_options_help()
         elif isinstance(self._help_request, GoalsHelp):
             self._print_goals_help()
+        elif isinstance(self._help_request, AllHelp):
+            self._print_all_help()
+        elif isinstance(self._help_request, OptionsHelp):
+            self._print_options_help()
         elif isinstance(self._help_request, UnknownGoalHelp):
             print("Unknown goals: {}".format(", ".join(self._help_request.unknown_goals)))
             print_hint()
@@ -95,22 +101,19 @@ def format_goal(name: str, descr: str) -> str:
         ]
         print("\n".join(lines))
 
+    def _print_all_help(self) -> None:
+        print(self._get_help_json())
+
     def _print_options_help(self) -> None:
         """Print a help screen.
 
         Assumes that self._help_request is an instance of OptionsHelp.
 
         Note: Ony useful if called after options have been registered.
         """
-
         help_request = cast(OptionsHelp, self._help_request)
-
-        if help_request.all_scopes:
-            help_scopes = set(self._all_help_info.scope_to_help_info.keys())
-        else:
-            # The scopes explicitly mentioned by the user on the cmd line.
-            help_scopes = set(help_request.scopes)
-
+        # The scopes explicitly mentioned by the user on the cmd line.
+        help_scopes = set(help_request.scopes)
         if help_scopes:
             for scope in sorted(help_scopes):
                 help_str = self._format_help(scope, help_request.advanced)
@@ -126,7 +129,7 @@ def _print_global_help(self, advanced: bool):
         print(
             f"  {self._bin_name} [option ...] [goal ...] [target/file ...]  Attempt the specified goals."
         )
-        print(f"  {self._bin_name} help                                       Get help.")
+        print(f"  {self._bin_name} help                                       Get global help.")
         print(
             f"  {self._bin_name} help [goal/subsystem]                      Get help for a goal or subsystem."
         )
@@ -137,7 +140,7 @@ def _print_global_help(self, advanced: bool):
             f"  {self._bin_name} help-advanced [goal/subsystem]             Get help for a goal's or subsystem's advanced options."
         )
         print(
-            f"  {self._bin_name} help-all                                   Get help for all goals and subsystems."
+            f"  {self._bin_name} help-all                                   Get a JSON object containing all help info."
         )
         print(
             f"  {self._bin_name} goals                                      List all installed goals."
@@ -154,7 +157,7 @@ def _print_global_help(self, advanced: bool):
         print(self._format_help(GLOBAL_SCOPE, advanced))
 
     def _format_help(self, scope: str, show_advanced_and_deprecated: bool) -> str:
-        """Return a help message for the options registered on this object.
+        """Return a human-readable help message for the options registered on this object.
 
         Assumes that self._help_request is an instance of OptionsHelp.
         """
@@ -177,3 +180,19 @@ def _format_help(self, scope: str, show_advanced_and_deprecated: bool) -> str:
                 formatted_lines.append(f"{related_subsystems_label} {', '.join(related_scopes)}")
                 formatted_lines.append("")
         return "\n".join(formatted_lines)
+
+    class Encoder(json.JSONEncoder):
+        def default(self, o):
+            if callable(o):
+                return o.__name__
+            if isinstance(o, type):
+                return type.__name__
+            if isinstance(o, Enum):
+                return o.value
+            return super().default(o)
+
+    def _get_help_json(self) -> str:
+        """Return a JSON object containing all the help info we have, for every scope."""
+        return json.dumps(
+            dataclasses.asdict(self._all_help_info), sort_keys=True, indent=2, cls=self.Encoder
+        )

src/python/pants/option/arg_splitter.py

@@ -36,16 +36,19 @@ class OptionsHelp(HelpRequest):
     """The user requested help on which options they can set."""
 
     advanced: bool = False
-    all_scopes: bool = False
     scopes: Tuple[str, ...] = ()
 
 
+class VersionHelp(HelpRequest):
+    """The user asked for the version of this instance of pants."""
+
+
 class GoalsHelp(HelpRequest):
     """The user requested help for installed Goals."""
 
 
-class VersionHelp(HelpRequest):
-    """The user asked for the version of this instance of pants."""
+class AllHelp(HelpRequest):
+    """The user requested a dump of all help info."""
 
 
 @dataclass(frozen=True)
@@ -74,15 +77,15 @@ class ArgSplitter:
 
     _HELP_BASIC_ARGS = ("-h", "--help", "help")
     _HELP_ADVANCED_ARGS = ("--help-advanced", "help-advanced")
-    _HELP_ALL_SCOPES_ARGS = ("--help-all", "help-all")
-    _HELP_VERSION_ARGS = ("-v", "-V", "--version")
+    _HELP_VERSION_ARGS = ("-v", "-V", "--version", "version")
     _HELP_GOALS_ARGS = ("goals",)
+    _HELP_ALL_SCOPES_ARGS = ("help-all",)
     _HELP_ARGS = (
         *_HELP_BASIC_ARGS,
         *_HELP_ADVANCED_ARGS,
-        *_HELP_ALL_SCOPES_ARGS,
         *_HELP_VERSION_ARGS,
         *_HELP_GOALS_ARGS,
+        *_HELP_ALL_SCOPES_ARGS,
     )
 
     def __init__(self, known_scope_infos: Iterable[ScopeInfo]) -> None:
@@ -91,6 +94,7 @@ def __init__(self, known_scope_infos: Iterable[ScopeInfo]) -> None:
         # that we heuristically identify target specs based on it containing /, : or being
         # a top-level directory.
         self._known_scopes = {si.scope for si in known_scope_infos} | {
+            "version",
             "goals",
             "help",
             "help-advanced",
@@ -130,17 +134,16 @@ def _check_for_help_request(self, arg: str) -> bool:
             self._help_request = VersionHelp()
         elif arg in self._HELP_GOALS_ARGS:
             self._help_request = GoalsHelp()
+        elif arg in self._HELP_ALL_SCOPES_ARGS:
+            self._help_request = AllHelp()
         else:
             # First ensure that we have a basic OptionsHelp.
             if not self._help_request:
                 self._help_request = OptionsHelp()
             # Now see if we need to enhance it.
             if isinstance(self._help_request, OptionsHelp):
                 advanced = self._help_request.advanced or arg in self._HELP_ADVANCED_ARGS
-                all_scopes = self._help_request.all_scopes or arg in self._HELP_ALL_SCOPES_ARGS
-                self._help_request = dataclasses.replace(
-                    self._help_request, advanced=advanced, all_scopes=all_scopes
-                )
+                self._help_request = dataclasses.replace(self._help_request, advanced=advanced)
         return True
 
     def split_args(self, args: Sequence[str]) -> SplitArgs:

src/python/pants/option/arg_splitter_test.py

@@ -299,8 +299,6 @@ def test_help_detection(self) -> None:
         assert_help_no_arguments("./pants --help --help-advanced", expected_help_advanced=True)
         assert_help_no_arguments("./pants --help-advanced --help", expected_help_advanced=True)
         assert_help_no_arguments("./pants help-all", expected_help_all=True)
-        assert_help_no_arguments("./pants --help-all", expected_help_all=True)
-        assert_help_no_arguments("./pants --help --help-all", expected_help_all=True)
         assert_help_no_arguments(
             "./pants help-advanced --help-all", expected_help_advanced=True, expected_help_all=True,
         )