Modernize webassets (#553)

* Switch to uv

* tox updated to use tox-uv

* Bulk update the tests to drop the nosetest format

* Mark webassets as typed

* Fix the deprecation warning for `find_executable`

* Fix the deprecation warning for invalid escapes

* Fix test gaps

- autoprefixer needs a different attribute; webkit supports animation
- handle babel's weird-ass preset error messages

* Add pytest xdist for looponfail

* CI setup for supported Pythons

* Fix tox config and hatch package

* Switch to locally installed node packages

* Explicitly install node during tests

* Bump to v3.0.0a1

* Fix two escape deprecations in the webassets source

* Pull tox out of pyproject.toml and leave it in CI

* Don't even try import the yuicompressor package

Author: offbyone

.github/workflows/ci.yml

@@ -0,0 +1,48 @@
+---
+name: CI
+
+on:
+  merge_group:
+  push:
+    branches: [master, main, ci-*]
+    tags: ["*"]
+  pull_request:
+  workflow_dispatch:
+
+env:
+  FORCE_COLOR: "1"
+  PIP_DISABLE_PIP_VERSION_CHECK: "1"
+  PIP_NO_PYTHON_VERSION_WARNING: "1"
+
+permissions: {}
+
+jobs:
+  tests:
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - "3.10"
+          - "3.11"
+          - "3.12"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          cache: 'npm'
+          cache-dependency-path: package-lock.json
+      - uses: hynek/setup-cached-uv@v2
+      - run: |
+          npm install
+          echo "$(pwd)/node_modules/.bin" >> "$GITHUB_PATH"
+
+      - name: Prepare tox
+        run: |
+          V=${{ matrix.python-version }}
+          echo TOX_PYTHON=py"$(echo $V | tr -d.)" >>"$GITHUB_ENV"
+
+      - run: >
+          uvx --with=tox-uv
+          tox run
+          -e ${{ env.TOX_PYTHON }}

CHANGES

@@ -1,3 +1,11 @@
+3.0 (2024-09)
+
+    Bumped to 3.0 because holy *shit* did this drop a bunch of versions and make changes!
+
+    - drop every Python version earlier than 3.11
+    - remove the now-obsolete "yui" compressor, since it's dead-dead-omgmalware-dead
+    - update tests so they validate that they work with babel 7, not 6
+
 2.0 (2019-12-20)
     Jump to 2.0 to leave alpha versioning and start doing semver. No actual breaking changes.