Use antsibull-docutils and remove code moved there

.github/workflows/nox.yml

@@ -48,6 +48,11 @@ jobs:
         uses: actions/checkout@v4
         with:
           path: antsibull-changelog
+      - name: Check out dependent project antsibull-docutils
+        uses: actions/checkout@v4
+        with:
+          repository: ansible-community/antsibull-docutils
+          path: antsibull-docutils
       - name: Install extra packages
         if: "matrix.packages != ''"
         run: |

README.md

@@ -46,6 +46,22 @@ Install and run `nox` to run all tests. That's it for simple contributions!
 `nox` will create virtual environments in `.nox` inside the checked out project
 and install the requirements needed to run the tests there.
 
+---
+
+antsibull-changelog depends on the sister antsibull-docutils project.
+By default, `nox` will install a development version of this project from Github.
+If you're hacking on antsibull-docutils alongside antsibull-changelog, nox will automatically
+install this project from  `../antsibull-docutils` when running tests if this path exists.
+You can change this behavior through the `OTHER_ANTSIBULL_MODE` env var:
+
+- `OTHER_ANTSIBULL_MODE=auto` — the default behavior described above
+- `OTHER_ANTSIBULL_MODE=local` — install the project from `../antsibull-docutils`.
+  Fail if those paths don't exist.
+- `OTHER_ANTSIBULL_MODE=git` — install the project from the Github main branch
+- `OTHER_ANTSIBULL_MODE=pypi` — install the latest version from PyPI
+
+---
+
 To run specific tests:
 
 1. `nox -e test` to only run unit tests;

changelogs/fragments/174-antsibull-docutils.yml

@@ -0,0 +1,3 @@
+minor_changes:
+  - "Antsibull-changelog now depends on the new package antsibull-docutils. This should not have any visible impact,
+     expect potentially improved MarkDown output (https://github.com/ansible-community/antsibull-changelog/pull/174)."

noxfile.py

@@ -3,6 +3,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 # SPDX-FileCopyrightText: 2023 Maxwell G <maxwell@gtmx.me>
 
+from __future__ import annotations
+
 import contextlib
 import os
 import tempfile
@@ -11,6 +13,7 @@
 
 import nox
 
+DEFAULT_MODE = os.environ.get("OTHER_ANTSIBULL_MODE", "auto")
 IN_CI = "GITHUB_ACTIONS" in os.environ
 ALLOW_EDITABLE = os.environ.get("ALLOW_EDITABLE", str(not IN_CI)).lower() in (
     "1",
@@ -34,9 +37,42 @@ def install(session: nox.Session, *args, editable=False, **kwargs):
     session.install(*args, "-U", **kwargs)
 
 
+def other_antsibull(
+    mode: str | None = None,
+) -> list[str | Path]:
+    if mode is None:
+        mode = DEFAULT_MODE
+    to_install: list[str | Path] = []
+    args = ("antsibull-docutils",)
+    for project in args:
+        path = Path("../", project)
+        path_exists = path.is_dir()
+        if mode == "auto":
+            if path_exists:
+                mode = "local"
+            else:
+                mode = "git"
+        if mode == "local":
+            if not path_exists:
+                raise ValueError(f"Cannot install {project}! {path} does not exist!")
+            if ALLOW_EDITABLE:
+                to_install.append("-e")
+            to_install.append(path)
+        elif mode == "git":
+            to_install.append(
+                f"{project} @ "
+                f"https://github.com/ansible-community/{project}/archive/main.tar.gz"
+            )
+        elif mode == "pypi":
+            to_install.append(project)
+        else:
+            raise ValueError(f"install_other_antsibull: invalid argument mode={mode!r}")
+    return to_install
+
+
 @nox.session(python=["3.9", "3.10", "3.11", "3.12"])
 def test(session: nox.Session):
-    install(session, ".[test, coverage]", editable=True)
+    install(session, ".[test, coverage]", *other_antsibull(), editable=True)
     covfile = Path(session.create_tmp(), ".coverage")
     more_args = []
     if session.python == "3.12":
@@ -60,7 +96,7 @@ def integration(session: nox.Session):
     `antsibull-changelog lint-changelog-yaml` against antsibull-changelog
     changelog and community.general's changelogs
     """
-    install(session, ".[coverage]", editable=True)
+    install(session, ".[coverage]", *other_antsibull(), editable=True)
     tmp = Path(session.create_tmp())
     covfile = tmp / ".coverage"
     env = {"COVERAGE_FILE": f"{covfile}", **session.env}
@@ -113,7 +149,7 @@ def integration(session: nox.Session):
 
 @nox.session
 def coverage(session: nox.Session):
-    install(session, ".[coverage]", editable=True)
+    install(session, ".[coverage]", *other_antsibull(), editable=True)
     combined = map(str, Path().glob(".nox/*/tmp/.coverage"))
     # Combine the results into a single .coverage file in the root
     session.run("coverage", "combine", "--keep", *combined)
@@ -132,7 +168,7 @@ def lint(session: nox.Session):
 
 @nox.session
 def formatters(session: nox.Session):
-    install(session, ".[formatters]")
+    install(session, ".[formatters]", *other_antsibull())
     posargs = list(session.posargs)
     if IN_CI:
         posargs.append("--check")
@@ -142,7 +178,7 @@ def formatters(session: nox.Session):
 
 @nox.session
 def codeqa(session: nox.Session):
-    install(session, ".[codeqa]", editable=True)
+    install(session, ".[codeqa]", *other_antsibull(), editable=True)
     session.run("flake8", "src/antsibull_changelog", *session.posargs)
     session.run(
         "pylint",
@@ -158,7 +194,7 @@ def codeqa(session: nox.Session):
 
 @nox.session
 def typing(session: nox.Session):
-    install(session, ".[typing]")
+    install(session, ".[typing]", *other_antsibull())
     session.run("mypy", "src/antsibull_changelog")
 
 

pyproject.toml

@@ -40,6 +40,7 @@ dependencies = [
     "PyYAML",
     "rstcheck >= 3.0.0, < 7.0.0",
     "semantic_version",
+    "antsibull-docutils >= 1.0.0, < 2.0.0",
 ]
 
 [project.urls]

src/antsibull_changelog/rendering/_document.py

@@ -12,9 +12,10 @@
 
 import abc
 
+from antsibull_docutils.utils import ensure_newline_after_last_content
+
 from ..config import TextFormat
 from .document import AbstractRenderer, DocumentRenderer
-from .utils import ensure_newline_after_last_content
 
 
 class BaseContent(abc.ABC):