use pyproject's docs for docs instead of requirements_docs.txt

.readthedocs.yaml

@@ -10,6 +10,7 @@ sphinx:
   fail_on_warning: false
 python:
    install:
-     - requirements: requirements_docs.txt
      - method: pip
        path: .
+       extra_requirements:
+         - docs

CHANGES

@@ -1,7 +1,12 @@
 Pint Changelog
 ==============
 
-0.25.3 (unreleased)
+0.26.0 (unreleased)
+-------------------
+
+- Nothing yet.
+
+0.25.3 (2026-03-19)
 -----------------
 
 - `GenericPlainRegistry.parse_expression` now correctly returns a dimensionless Quantity when taking a float, int, or NaN (#2259)

MANIFEST.in

@@ -5,5 +5,5 @@ recursive-include benchmarks *
 prune docs/_build
 prune docs/_themes/.git
 prune pint/.pytest_cache
-exclude .editorconfig bors.toml pull_request_template.md requirements_docs.txt version.py
+exclude .editorconfig bors.toml pull_request_template.md version.py
 global-exclude *.pyc *~ .DS_Store *__pycache__* *.pyo .travis-exclude.yml *.lock

docs/dev/contributing.rst

@@ -95,8 +95,7 @@ In a terminal, navigate where you want the code to be downloaded, and type::
     $ cd pint
     $ python -m virtualenv venv
     $ source venv/bin/activate
-    $ pip install -e '.[test]'
-    $ pip install -r requirements_docs.txt
+    $ pip install -e '.[test,docs]'
     $ pip install pre-commit # This step and the next are optional but recommended.
     $ pre-commit install
 
@@ -109,8 +108,7 @@ Then type::
 
     $ conda install pip
     $ conda install git
-    $ pip install -e ".[test]"
-    $ pip install -r requirements_docs.txt
+    $ pip install -e ".[test,docs]"
     $ pip install pre-commit
     $ pre-commit install
 

pyproject.toml

@@ -75,6 +75,10 @@ docs = [
   "sciform",
   "scipy",
   "currencyconverter",
+  "matplotlib",
+  "numpy",
+  "xarray",
+  "dask[complete]<2025.3.0",
 ]
 
 [project.urls]
@@ -109,7 +113,7 @@ ignore = [
   "E731", # do not assign a lambda expression, use a def
 ]
 
-[tool.pixi.project]
+[tool.pixi.workspace]
 channels = ["https://fast.prefix.dev/conda-forge"]
 platforms = ['osx-arm64', 'linux-64', 'win-64']