Files
falyx/examples/argument_examples.py
Roland Thomas 169f228c92 feat(parser): POSIX bundling, multi-value/default validation, smarter completions; help UX & examples
- Mark help parser with `_is_help_command=True` so CLI renders as `program help`.
- Add TLDR examples to `Exit` and `History` commands.
- Normalize help TLDR/tag docs to short forms `-T` (tldr) and `-t [TAG]`.
- Also propagate submenu exit help text TLDRs when set.
- Disallow defaults for `HELP`, `TLDR`, `COUNT`, and boolean store actions.
- Enforce list defaults for `APPEND`/`EXTEND` and any `nargs` in `{int, "*", "+"}`; coerce to list when `nargs == 1`.
- Validate default(s) against `choices` (lists must be subset).
- Strengthen `choices` checking at parse-time for both scalars and lists; track invalid-choice state for UX.
- New `_resolve_posix_bundling()` with context:
  - Won’t split negative numbers or dash-prefixed positional/path values.
  - Uses the *last seen flag’s type/action* to decide if a dash token is a value vs. bundle.
- Add `_is_valid_dash_token_positional_value()` and `_find_last_flag_argument()` helpers.
- Completions overhaul
  - Track `consumed_position` and `has_invalid_choice` per-arg (via new `ArgumentState.set_consumed()` / `reset()`).
  - Add `_is_mid_value()` and `_value_suggestions_for_arg()` to produce value suggestions while typing.
  - Persist value context for multi-value args (`nargs="*"`, `"+"`) for each call to parse_args
  - Suppress suggestions when a choice is currently invalid, then recover as the prefix becomes valid.
  - Respect `cursor_at_end_of_token`; do not mutate the user’s prefix; improve path suggestions (`"."` vs prefix).
  - Better behavior after a space: suggest remaining flags when appropriate.
- Consistent `index` naming (vs `i`) and propagate `base_index` into positional consumption to mark positions accurately.
- Return value tweaks for `find_argument_by_dest()` and minor readability changes.
- Replace the minimal completion test with a comprehensive suite covering:
  - Basics (defaults, option parsing, lists, booleans).
  - Validation edges (default/choices, `nargs` list requirements).
  - POSIX bundling (flags only; negative values; dash-prefixed paths).
  - Completions for flags/values/mid-value/path/`nargs="*"` persistence.
  - `store_bool_optional` (feature / no-feature, last one wins).
  - Invalid choice suppression & recovery.
  - Repeated keywords (last one wins) and completion context follows the last.
  - File-system-backed path suggestions.
- Bumped version to 0.1.83.
2025-08-10 15:55:45 -04:00

192 lines
4.8 KiB
Python

import asyncio
from enum import Enum
from pathlib import Path
from falyx import Falyx
from falyx.action import Action
from falyx.parser.command_argument_parser import CommandArgumentParser
class Place(Enum):
"""Enum for different places."""
NEW_YORK = "New York"
SAN_FRANCISCO = "San Francisco"
LONDON = "London"
def __str__(self):
return self.value
async def test_args(
service: str,
place: Place = Place.NEW_YORK,
region: str = "us-east-1",
path: Path | None = None,
tag: str | None = None,
verbose: bool | None = None,
numbers: list[int] | None = None,
just_a_bool: bool = False,
) -> str:
if numbers is None:
numbers = []
if verbose:
print(
f"Deploying {service}:{tag}:{"|".join(str(number) for number in numbers)} to {region} at {place} from {path}..."
)
return f"{service}:{tag}:{"|".join(str(number) for number in numbers)} deployed to {region} at {place} from {path}."
async def test_path_arg(*paths: Path) -> str:
return f"Path argument received: {'|'.join(str(path) for path in paths)}"
async def test_positional_numbers(*numbers: int) -> str:
return f"Positional numbers received: {', '.join(str(num) for num in numbers)}"
def default_config(parser: CommandArgumentParser) -> None:
"""Default argument configuration for the command."""
parser.add_argument(
"service",
type=str,
choices=["web", "database", "cache"],
help="Service name to deploy.",
)
parser.add_argument(
"place",
type=Place,
choices=list(Place),
default=Place.NEW_YORK,
help="Place where the service will be deployed.",
)
parser.add_argument(
"--region",
type=str,
default="us-east-1",
help="Deployment region.",
choices=["us-east-1", "us-west-2", "eu-west-1"],
)
parser.add_argument(
"-p",
"--path",
type=Path,
help="Path to the configuration file.",
)
parser.add_argument(
"--verbose",
action="store_bool_optional",
help="Enable verbose output.",
)
parser.add_argument(
"-t",
"--tag",
type=str,
help="Optional tag for the deployment.",
suggestions=["latest", "stable", "beta"],
)
parser.add_argument(
"--numbers",
type=int,
nargs="*",
default=[1, 2, 3],
help="Optional number argument.",
)
parser.add_argument(
"-j",
"--just-a-bool",
action="store_true",
help="Just a boolean flag.",
)
parser.add_tldr_examples(
[
("web", "Deploy 'web' to the default location (New York)"),
("cache London --tag beta", "Deploy 'cache' to London with tag"),
("database --region us-west-2 --verbose", "Verbose deploy to west region"),
]
)
def path_config(parser: CommandArgumentParser) -> None:
"""Argument configuration for path testing command."""
parser.add_argument(
"paths",
type=Path,
nargs="*",
help="One or more file or directory paths.",
)
parser.add_tldr_examples(
[
("/path/to/file.txt", "Single file path"),
("/path/to/dir1 /path/to/dir2", "Multiple directory paths"),
("/path/with spaces/file.txt", "Path with spaces"),
]
)
def numbers_config(parser: CommandArgumentParser) -> None:
"""Argument configuration for positional numbers testing command."""
parser.add_argument(
"numbers",
type=int,
nargs="*",
help="One or more integers.",
)
parser.add_tldr_examples(
[
("1 2 3", "Three numbers"),
("42", "Single number"),
("", "No numbers"),
]
)
flx = Falyx(
"Argument Examples",
program="argument_examples.py",
hide_menu_table=True,
show_placeholder_menu=True,
enable_prompt_history=True,
)
flx.add_command(
key="T",
aliases=["test"],
description="Test Command",
help_text="A command to test argument parsing.",
action=Action(
name="test_args",
action=test_args,
),
style="bold #B3EBF2",
argument_config=default_config,
)
flx.add_command(
key="P",
aliases=["path"],
description="Path Command",
help_text="A command to test path argument parsing.",
action=Action(
name="test_path_arg",
action=test_path_arg,
),
style="bold #F2B3EB",
argument_config=path_config,
)
flx.add_command(
key="N",
aliases=["numbers"],
description="Numbers Command",
help_text="A command to test positional numbers argument parsing.",
action=Action(
name="test_positional_numbers",
action=test_positional_numbers,
),
style="bold #F2F2B3",
argument_config=numbers_config,
)
asyncio.run(flx.run())