zrepl/docs/run-sphinx-multiversion.py
Christian Schwarz 8b0637ddcc
docs: switch to sphinx-multiversion for multi-versioned docs (#734)
The sphinxcontrib-versioning seems unmaintainted and I can't
get the fork that we used before this PR working on Python 3.10.

The situation wrt maintenance doesn't seem much better for
sphinx-multiversion, but, at least I could get it to work
with current sphinx versions.

The main problem with sphinx-multiversion is that it doesn't render
anything at `/`. I.e., `https://zrepl.github.io/configuration.html` will
be 404.
That's different from `sphinxcontrib-versioning`, and thus switching
to sphinx-multiversion would break URLs.
We host on GitHub pages and don't control the webserver,
so, we can't use webserver-level redirects to keep the URLs working.
We could create JS-level redirects, or `http-equiv`, but that's ugly as
well.
The simplest solution was to fork sphinx-multiversion and hard-code
zrepl's specific needs into that fork.
The fork is based off v0.2.4 and pinned via requirements.txt.
Here are its unique commits:
https://github.com/Holzhaus/sphinx-multiversion/compare/master...zrepl:sphinx-multiversion:zrepl

We should revisit `sphinx-polyversion` in the future once its docs
improve.
See
https://github.com/Holzhaus/sphinx-multiversion/issues/88#issuecomment-1606221194

This PR updates the various Python packages, as I couldn't get
sphinx-multiversion to work with the (very old) versions that were
pinned in `requirements.txt` prior to this PR.
This PR's `requirements.txt` is from a clean Python 3.10 venv on Ubuntu
22.10 after running

```
pip install sphinx sphinx-rtd-theme
pip install 'git+https://github.com/zrepl/sphinx-multiversion/@52c915d7ad898d9641ec48c8bbccb7d4f079db93#egg=sphinx_multiversion'
```
2023-09-09 12:21:25 +02:00

73 lines
1.9 KiB
Python

#!/usr/bin/env python3
from pathlib import Path
import subprocess
import re
import argparse
import distutils
argparser = argparse.ArgumentParser()
argparser.add_argument("docsroot")
argparser.add_argument("outdir")
args = argparser.parse_args()
output = subprocess.run(["git", "tag", "-l"], capture_output=True, check=True, text=True)
tagRE = re.compile(r"^v(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(-rc(?P<rc>\d+))?$")
class Tag:
orig: str
major: int
minor: int
patch: int
rc: int
def __str__(self):
return self.orig
def __repr__(self):
return self.orig
tags = []
for line in output.stdout.split("\n"):
m = tagRE.match(line)
if not m:
continue
m = m.groupdict()
t = Tag()
t.orig = line
t.major = int(m["major"])
t.minor = int(m["minor"])
t.patch = int(m["patch"])
t.rc = int(m["rc"] if m["rc"] is not None else 0)
tags.append(t)
by_major_minor = {}
for tag in tags:
key = (tag.major, tag.minor)
l = by_major_minor.get(key, [])
l.append(tag)
by_major_minor[key] = l
latest_by_major_minor = []
for (mm, l) in by_major_minor.items():
# sort ascending by patch-level (rc's weigh less)
l.sort(key=lambda tag: (tag.patch, int(tag.rc == 0), tag.rc))
latest_by_major_minor.append(l[-1])
latest_by_major_minor.sort(key=lambda tag: (tag.major, tag.minor))
cmdline = [
"sphinx-multiversion",
"-D", "smv_tag_whitelist=^({})$".format("|".join([re.escape(tag.orig) for tag in latest_by_major_minor])),
"-D", "smv_branch_whitelist=^(master|stable)$",
"-D", "smv_remote_whitelist=^.*$",
"-D", "smv_latest_version=stable",
"-D", r"smv_released_pattern=^refs/(tags|heads|remotes/[^/]+)/(?!master).*$", # treat everything except master as released, that way, the banner message makes sense
# "--dump-metadata", # for debugging
args.docsroot,
args.outdir,
]
print(cmdline)
subprocess.run(cmdline, check=True)