Unify CLIs (#537)

* Combine CLIs into a single one, exposing as an entrypoint.

* Update tests for CLI changes

* Update python -m references in the docs

* Update test.yml workflow

* Use older type annotations

* Show help when no subcommand is provided

* Refactor lint subparser and hook tests

* Rename test to match subcommand

.github/workflows/test.yml

@@ -57,10 +57,10 @@ jobs:
 
       - name: Make sure CLI works
         run: |
-          python -m numpydoc numpydoc.tests.test_main._capture_stdout
-          echo '! python -m numpydoc numpydoc.tests.test_main._invalid_docstring' | bash
-          python -m numpydoc --validate numpydoc.tests.test_main._capture_stdout
-          echo '! python -m numpydoc --validate numpydoc.tests.test_main._docstring_with_errors' | bash
+          numpydoc render numpydoc.tests.test_main._capture_stdout
+          echo '! numpydoc render numpydoc.tests.test_main._invalid_docstring' | bash
+          numpydoc validate numpydoc.tests.test_main._capture_stdout
+          echo '! numpydoc validate numpydoc.tests.test_main._docstring_with_errors' | bash
 
       - name: Setup for doc build
         run: |
@@ -110,10 +110,10 @@ jobs:
 
       - name: Make sure CLI works
         run: |
-          python -m numpydoc numpydoc.tests.test_main._capture_stdout
-          echo '! python -m numpydoc numpydoc.tests.test_main._invalid_docstring' | bash
-          python -m numpydoc --validate numpydoc.tests.test_main._capture_stdout
-          echo '! python -m numpydoc --validate numpydoc.tests.test_main._docstring_with_errors' | bash
+          numpydoc render numpydoc.tests.test_main._capture_stdout
+          echo '! numpydoc render numpydoc.tests.test_main._invalid_docstring' | bash
+          numpydoc validate numpydoc.tests.test_main._capture_stdout
+          echo '! numpydoc validate numpydoc.tests.test_main._docstring_with_errors' | bash
 
       - name: Setup for doc build
         run: |

.pre-commit-hooks.yaml

@@ -1,7 +1,7 @@
 - id: numpydoc-validation
   name: numpydoc-validation
   description: This hook validates that docstrings in committed files adhere to numpydoc standards.
-  entry: validate-docstrings
+  entry: numpydoc lint
   require_serial: true
   language: python
   types: [python]

doc/validation.rst

@@ -22,7 +22,7 @@ command line options for this hook:
 
 .. code-block:: bash
 
-    $ python -m numpydoc.hooks.validate_docstrings --help
+    $ numpydoc lint --help
 
 Using a config file provides additional customization. Both ``pyproject.toml``
 and ``setup.cfg`` are supported; however, if the project contains both
@@ -102,12 +102,12 @@ can be called. For example, to do it for ``numpy.ndarray``, use:
 
 .. code-block:: bash
 
-    $ python -m numpydoc numpy.ndarray
+    $ numpydoc validate numpy.ndarray
 
 This will validate that the docstring can be built.
 
 For an exhaustive validation of the formatting of the docstring, use the
-``--validate`` parameter. This will report the errors detected, such as
+``validate`` subcommand. This will report the errors detected, such as
 incorrect capitalization, wrong order of the sections, and many other
 issues. Note that this will honor :ref:`inline ignore comments <inline_ignore_comments>`,
 but will not look for any configuration like the :ref:`pre-commit hook <pre_commit_hook>`

numpydoc/__main__.py

@@ -2,55 +2,6 @@
 Implementing `python -m numpydoc` functionality.
 """
 
-import sys
-import argparse
-import ast
+from .cli import main
 
-from .docscrape_sphinx import get_doc_object
-from .validate import validate, Validator
-
-
-def render_object(import_path, config=None):
-    """Test numpydoc docstring generation for a given object"""
-    # TODO: Move Validator._load_obj to a better place than validate
-    print(get_doc_object(Validator._load_obj(import_path), config=dict(config or [])))
-    return 0
-
-
-def validate_object(import_path):
-    exit_status = 0
-    results = validate(import_path)
-    for err_code, err_desc in results["errors"]:
-        exit_status += 1
-        print(":".join([import_path, err_code, err_desc]))
-    return exit_status
-
-
-if __name__ == "__main__":
-    ap = argparse.ArgumentParser(description=__doc__)
-    ap.add_argument("import_path", help="e.g. numpy.ndarray")
-
-    def _parse_config(s):
-        key, _, value = s.partition("=")
-        value = ast.literal_eval(value)
-        return key, value
-
-    ap.add_argument(
-        "-c",
-        "--config",
-        type=_parse_config,
-        action="append",
-        help="key=val where val will be parsed by literal_eval, "
-        "e.g. -c use_plots=True. Multiple -c can be used.",
-    )
-    ap.add_argument(
-        "--validate", action="store_true", help="validate the object and report errors"
-    )
-    args = ap.parse_args()
-
-    if args.validate:
-        exit_code = validate_object(args.import_path)
-    else:
-        exit_code = render_object(args.import_path, args.config)
-
-    sys.exit(exit_code)
+raise SystemExit(main())

numpydoc/cli.py

@@ -0,0 +1,128 @@
+"""The CLI for numpydoc."""
+
+import argparse
+import ast
+from pathlib import Path
+from typing import List, Sequence, Union
+
+from .docscrape_sphinx import get_doc_object
+from .hooks import utils, validate_docstrings
+from .validate import ERROR_MSGS, Validator, validate
+
+
+def render_object(import_path: str, config: Union[List[str], None] = None) -> int:
+    """Test numpydoc docstring generation for a given object."""
+    # TODO: Move Validator._load_obj to a better place than validate
+    print(get_doc_object(Validator._load_obj(import_path), config=dict(config or [])))
+    return 0
+
+
+def validate_object(import_path: str) -> int:
+    """Run numpydoc docstring validation for a given object."""
+    exit_status = 0
+    results = validate(import_path)
+    for err_code, err_desc in results["errors"]:
+        exit_status += 1
+        print(":".join([import_path, err_code, err_desc]))
+    return exit_status
+
+
+def get_parser() -> argparse.ArgumentParser:
+    """
+    Build an argument parser.
+
+    Returns
+    -------
+    argparse.ArgumentParser
+        The argument parser.
+    """
+    ap = argparse.ArgumentParser(prog="numpydoc", description=__doc__)
+    subparsers = ap.add_subparsers(title="subcommands")
+
+    def _parse_config(s):
+        key, _, value = s.partition("=")
+        value = ast.literal_eval(value)
+        return key, value
+
+    render = subparsers.add_parser(
+        "render",
+        description="Generate an expanded RST-version of the docstring.",
+        help="generate the RST docstring with numpydoc",
+    )
+    render.add_argument("import_path", help="e.g. numpy.ndarray")
+    render.add_argument(
+        "-c",
+        "--config",
+        type=_parse_config,
+        action="append",
+        help="key=val where val will be parsed by literal_eval, "
+        "e.g. -c use_plots=True. Multiple -c can be used.",
+    )
+    render.set_defaults(func=render_object)
+
+    validate = subparsers.add_parser(
+        "validate",
+        description="Validate an object's docstring against the numpydoc standard.",
+        help="validate the object's docstring and report errors",
+    )
+    validate.add_argument("import_path", help="e.g. numpy.ndarray")
+    validate.set_defaults(func=validate_object)
+
+    project_root_from_cwd, config_file = utils.find_project_root(["."])
+    config_options = validate_docstrings.parse_config(project_root_from_cwd)
+    ignored_checks = [
+        f"- {check}: {ERROR_MSGS[check]}"
+        for check in set(ERROR_MSGS.keys()) - config_options["checks"]
+    ]
+    ignored_checks_text = "\n  " + "\n  ".join(ignored_checks) + "\n"
+
+    lint_parser = subparsers.add_parser(
+        "lint",
+        description="Run numpydoc validation on files with option to ignore individual checks.",
+        help="validate all docstrings in file(s) using the abstract syntax tree",
+        formatter_class=argparse.RawTextHelpFormatter,
+    )
+    lint_parser.add_argument(
+        "files", type=str, nargs="+", help="File(s) to run numpydoc validation on."
+    )
+    lint_parser.add_argument(
+        "--config",
+        type=str,
+        help=(
+            "Path to a directory containing a pyproject.toml or setup.cfg file.\n"
+            "The hook will look for it in the root project directory.\n"
+            "If both are present, only pyproject.toml will be used.\n"
+            "Options must be placed under\n"
+            "    - [tool:numpydoc_validation] for setup.cfg files and\n"
+            "    - [tool.numpydoc_validation] for pyproject.toml files."
+        ),
+    )
+    lint_parser.add_argument(
+        "--ignore",
+        type=str,
+        nargs="*",
+        help=(
+            f"""Check codes to ignore.{
+                ' Currently ignoring the following from '
+                f'{Path(project_root_from_cwd) / config_file}: {ignored_checks_text}'
+                'Values provided here will be in addition to the above, unless an alternate config is provided.'
+                if ignored_checks else ''
+            }"""
+        ),
+    )
+    lint_parser.set_defaults(func=validate_docstrings.run_hook)
+
+    return ap
+
+
+def main(argv: Union[Sequence[str], None] = None) -> int:
+    """CLI for numpydoc."""
+    ap = get_parser()
+
+    args = vars(ap.parse_args(argv))
+
+    try:
+        func = args.pop("func")
+        return func(**args)
+    except KeyError:
+        ap.exit(status=2, message=ap.format_help())

numpydoc/hooks/validate_docstrings.py

@@ -1,6 +1,5 @@
 """Run numpydoc validation on contents of a file."""
 
-import argparse
 import ast
 import configparser
 import os
@@ -13,7 +12,7 @@
     import tomli as tomllib
 
 from pathlib import Path
-from typing import Sequence, Tuple, Union
+from typing import Any, Dict, List, Tuple, Union
 
 from tabulate import tabulate
 
@@ -341,62 +340,35 @@ def process_file(filepath: os.PathLike, config: dict) -> "list[list[str]]":
     return docstring_visitor.findings
 
 
-def main(argv: Union[Sequence[str], None] = None) -> int:
-    """Run the numpydoc validation hook."""
+def run_hook(
+    files: List[str],
+    *,
+    config: Union[Dict[str, Any], None] = None,
+    ignore: Union[List[str], None] = None,
+) -> int:
+    """
+    Run the numpydoc validation hook.
 
-    project_root_from_cwd, config_file = find_project_root(["."])
-    config_options = parse_config(project_root_from_cwd)
-    ignored_checks = (
-        "\n  "
-        + "\n  ".join(
-            [
-                f"- {check}: {validate.ERROR_MSGS[check]}"
-                for check in set(validate.ERROR_MSGS.keys()) - config_options["checks"]
-            ]
-        )
-        + "\n"
-    )
-
-    parser = argparse.ArgumentParser(
-        description="Run numpydoc validation on files with option to ignore individual checks.",
-        formatter_class=argparse.RawTextHelpFormatter,
-    )
-    parser.add_argument(
-        "files", type=str, nargs="+", help="File(s) to run numpydoc validation on."
-    )
-    parser.add_argument(
-        "--config",
-        type=str,
-        help=(
-            "Path to a directory containing a pyproject.toml or setup.cfg file.\n"
-            "The hook will look for it in the root project directory.\n"
-            "If both are present, only pyproject.toml will be used.\n"
-            "Options must be placed under\n"
-            "    - [tool:numpydoc_validation] for setup.cfg files and\n"
-            "    - [tool.numpydoc_validation] for pyproject.toml files."
-        ),
-    )
-    parser.add_argument(
-        "--ignore",
-        type=str,
-        nargs="*",
-        help=(
-            f"""Check codes to ignore.{
-                ' Currently ignoring the following from '
-                f'{Path(project_root_from_cwd) / config_file}: {ignored_checks}'
-                'Values provided here will be in addition to the above, unless an alternate config is provided.'
-                if config_options["checks"] else ''
-            }"""
-        ),
-    )
-
-    args = parser.parse_args(argv)
-    project_root, _ = find_project_root(args.files)
-    config_options = parse_config(args.config or project_root)
-    config_options["checks"] -= set(args.ignore or [])
+    Parameters
+    ----------
+    files : list[str]
+        The absolute or relative paths to the files to inspect.
+    config : Union[dict[str, Any], None], optional
+        Configuration options for reviewing flagged issues.
+    ignore : Union[list[str], None], optional
+        Checks to ignore in the results.
+
+    Returns
+    -------
+    int
+        The return status: 1 if issues were found, 0 otherwise.
+    """
+    project_root, _ = find_project_root(files)
+    config_options = parse_config(config or project_root)
+    config_options["checks"] -= set(ignore or [])
 
     findings = []
-    for file in args.files:
+    for file in files:
         findings.extend(process_file(file, config_options))
 
     if findings:
@@ -411,7 +383,3 @@ def main(argv: Union[Sequence[str], None] = None) -> int:
         )
         return 1
     return 0
-
-
-if __name__ == "__main__":
-    raise SystemExit(main())