FEAT: generate API with simple configuration value (#1)

* MAINT remove redundant Markdown newlines

.cspell.json

@@ -1,11 +1,5 @@
 {
   "version": "0.2",
-  "enableFiletypes": [
-    "git-commit",
-    "github-actions-workflow",
-    "julia",
-    "jupyter"
-  ],
   "flagWords": [
     "analyse",
     "colour",
@@ -20,6 +14,7 @@
     "transisions"
   ],
   "ignorePaths": [
+    "**/*.rst_t",
     "**/.cspell.json",
     ".editorconfig",
     ".gitignore",
@@ -30,6 +25,8 @@
   ],
   "language": "en-US",
   "words": [
+    "ampform",
+    "apidoc",
     "autoapi",
     "autodoc",
     "ComPWA",
@@ -46,6 +43,14 @@
     "refspecific",
     "reftarget",
     "reftype",
-    "rtfd"
+    "rtfd",
+    "srcdir",
+    "templatedir"
+  ],
+  "enableFiletypes": [
+    "git-commit",
+    "github-actions-workflow",
+    "julia",
+    "jupyter"
   ]
 }

.pre-commit-config.yaml

@@ -45,7 +45,7 @@ repos:
       - id: blacken-docs
 
   - repo: https://github.com/ComPWA/repo-maintenance
-    rev: 0.1.6
+    rev: 0.1.7
     hooks:
       - id: check-dev-files
         args:

README.md

@@ -22,9 +22,7 @@ Just install through [PyPI](https://pypi.org) with `pip`:
 pip install sphinx-api-relink
 ```
 
-Next, in your
-[Sphinx configuration file](https://www.sphinx-doc.org/en/master/usage/configuration.html)
-(`conf.py`), add `"sphinx_api_relink"` to your `extensions`:
+Next, in your [Sphinx configuration file](https://www.sphinx-doc.org/en/master/usage/configuration.html) (`conf.py`), add `"sphinx_api_relink"` to your `extensions`:
 
 ```python
 extensions = [
@@ -50,3 +48,24 @@ api_target_types: dict[str, str] = {
     "RangeDefinition": "obj",
 }
 ```
+
+## Generate API
+
+To generate the API for [`sphinx.ext.autodoc`](https://www.sphinx-doc.org/en/master/usage/extensions/autodoc.html), add this to your `conf.py`:
+
+```python
+api_package_path = "../src/my_package"  # relative to conf.py
+```
+
+The API is generated with the same style used by the ComPWA repositories (see e.g. [ampform.rtfd.io/en/stable/api/ampform.html](https://ampform.readthedocs.io/en/stable/api/ampform.html)). To use the default template, set:
+
+```python
+generate_apidoc_use_compwa_template = False
+```
+
+Other configuration values (with their defaults):
+
+```python
+generate_apidoc_directory = "api"
+generate_apidoc_excludes = ["version.py"]
+```

pyproject.toml

@@ -74,7 +74,10 @@ license-files = ["LICENSE"]
 package-dir = {"" = "src"}
 
 [tool.setuptools.package-data]
-"*" = ["py.typed"]
+"*" = [
+    "py.typed",
+    "templates/*.rst_t",
+]
 
 [tool.setuptools.packages.find]
 namespaces = false

src/sphinx_api_relink/__init__.py

@@ -2,12 +2,15 @@
 
 from __future__ import annotations
 
+import shutil
+from pathlib import Path
 from typing import TYPE_CHECKING, Any
 
 import sphinx.domains.python
 from docutils import nodes
 from sphinx.addnodes import pending_xref, pending_xref_condition
 from sphinx.domains.python import parse_reftarget
+from sphinx.ext.apidoc import main as sphinx_apidoc
 
 if TYPE_CHECKING:
     from sphinx.application import Sphinx
@@ -17,13 +20,62 @@
 def setup(app: Sphinx) -> dict[str, Any]:
     app.add_config_value("api_target_substitutions", default={}, rebuild="env")
     app.add_config_value("api_target_types", default={}, rebuild="env")
+    app.add_config_value("generate_apidoc_directory", default="api", rebuild="env")
+    app.add_config_value("generate_apidoc_excludes", default=None, rebuild="env")
+    app.add_config_value("generate_apidoc_package_path", default=None, rebuild="env")
+    app.add_config_value("generate_apidoc_use_compwa_template", True, rebuild="env")
+    app.connect("config-inited", generate_apidoc)
     app.connect("config-inited", replace_type_to_xref)
     return {
         "parallel_read_safe": True,
         "parallel_write_safe": True,
     }
 
 
+def generate_apidoc(app: Sphinx, _: BuildEnvironment) -> None:
+    config_key = "generate_apidoc_package_path"
+    package_path: str | None = getattr(app.config, config_key, None)
+    if package_path is None:
+        return
+    abs_package_path = Path(app.srcdir) / package_path
+    apidoc_dir = Path(app.srcdir) / app.config.generate_apidoc_directory
+    _run_sphinx_apidoc(
+        abs_package_path,
+        apidoc_dir,
+        excludes=app.config.generate_apidoc_excludes,
+        use_compwa_template=app.config.generate_apidoc_use_compwa_template,
+    )
+
+
+def _run_sphinx_apidoc(
+    package_path: Path,
+    apidoc_dir: str = "api",
+    excludes: list[str] | None = None,
+    use_compwa_template: bool = True,
+) -> None:
+    if not package_path.exists():
+        msg = f"Package under {package_path} does not exist"
+        raise FileNotFoundError(msg)
+    shutil.rmtree(apidoc_dir, ignore_errors=True)
+    args: list[str] = [str(package_path)]
+    if excludes is None:
+        excludes = []
+    version_file = "version.py"
+    if (package_path / version_file).exists():
+        excludes.append(version_file)
+    for file in excludes:
+        excluded_path = package_path / file
+        if not excluded_path.exists():
+            msg = f"Excluded file {excluded_path} does not exist"
+            raise FileNotFoundError(msg)
+        args.append(str(package_path / file))
+    args.extend(f"-o {apidoc_dir} --force --no-toc --separate".split())
+    if use_compwa_template:
+        template_dir = Path(__file__).parent / "templates"
+        args.extend(f"--templatedir {template_dir}".split())
+    sphinx_apidoc(args)
+
+
 def replace_type_to_xref(app: Sphinx, _: BuildEnvironment) -> None:
     target_substitutions = _get_target_substitutions(app)
     ref_targets = {

src/sphinx_api_relink/templates/module.rst_t

@@ -0,0 +1,12 @@
+{%- if show_headings and not separate %}
+{{ basename.split(".")[-1] | e | heading }}
+
+.. code-block:: python
+
+  import {{ basename }}
+
+{% endif -%}
+.. automodule:: {{ qualname }}
+{%- for option in automodule_options %}
+  :{{ option }}:
+{%- endfor %}

src/sphinx_api_relink/templates/package.rst_t

@@ -0,0 +1,49 @@
+{%- macro automodule(modname, options) -%}
+.. automodule:: {{ modname }}
+{%- for option in options %}
+  :{{ option }}:
+{%- endfor %}
+{%- endmacro %}
+
+{%- macro toctree(docnames) -%}
+.. toctree::
+{% for docname in docnames %}
+  {{ docname }}
+{%- endfor %}
+{%- endmacro %}
+
+{{ pkgname.split(".")[-1] | e | heading }}
+
+.. code-block:: python
+
+  import {{ pkgname }}
+
+{%- if modulefirst and not is_namespace %}
+{{ automodule(pkgname, automodule_options) }}
+{% endif %}
+
+{%- if not modulefirst and not is_namespace %}
+
+{{ automodule(pkgname, automodule_options) }}
+{% endif %}
+
+{%- if submodules or subpackages %}
+.. rubric:: Submodules and Subpackages
+{% endif %}
+
+{%- if subpackages %}
+
+{{ toctree(subpackages) }}
+{% endif %}
+{%- if submodules %}
+{% if separatemodules %}
+{{ toctree(submodules) }}
+{%- else %}
+{%- for submodule in submodules %}
+{% if show_headings %}
+{{- [submodule, "module"] | join(" ") | e | heading(2) }}
+{% endif %}
+{{ automodule(submodule, automodule_options) }}
+{% endfor %}
+{%- endif %}
+{% endif %}

src/sphinx_api_relink/templates/toc.rst_t

@@ -0,0 +1,7 @@
+{{ header | heading }}
+
+.. toctree::
+  :maxdepth: {{ maxdepth }}
+{% for docname in docnames %}
+  {{ docname }}
+{%- endfor %}