docs: fix workflows

.github/workflows/check-removed-urls.yml

@@ -0,0 +1,56 @@
+name: Check for removed URLs
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  build-docs:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout PR branch
+        uses: actions/checkout@v5
+        with:
+          # This implicitly gets the PR branch. Making it explicit causes problems
+          # with private forks, but it is equivalent to the following:
+          # repository: ${{ github.event.pull_request.head.repo.full_name }}
+          # ref: ${{ github.event.pull_request.head.ref }}
+          fetch-depth: 0
+          path: compare
+      - name: Checkout base branch
+        uses: actions/checkout@v5
+        with:
+          ref: ${{ github.event.pull_request.base.ref }}
+          repository: ${{ github.event.pull_request.base.repo.full_name }}
+          fetch-depth: 0
+          path: base
+      - uses: actions/setup-python@v6
+      - name: Build docs
+        run: |
+          for dir in compare base; do
+            pushd ${dir}/docs
+            make install
+            . .sphinx/venv/bin/activate
+            make html
+            popd
+          done
+      - name: Generate current URLs list
+        run: |
+          for dir in compare base; do
+            pushd ${dir}/docs
+            find ./_build/ -name '*.html' \
+            | sed 's|/_build||;s|/index.html$|/|;s|.html$||' \
+            | sort > urls.txt
+            popd
+          done
+      - name: Compare URLs
+        run: |
+          BASE_URLS_PATH="base/docs/urls.txt"
+          COMPARE_URLS_PATH="compare/docs/urls.txt"
+          removed=$(comm -23 ${BASE_URLS_PATH} ${COMPARE_URLS_PATH} )
+          if [ -n "$removed" ]; then
+            echo "The following URLs were removed:"
+            echo "$removed"
+            echo "Please ensure removed pages are redirected"
+            exit 1
+          fi

.github/workflows/cla-check.yml

@@ -0,0 +1,13 @@
+# This workflow checks if the contributor has signed the Canonical Contributor Licence Agreement (CLA)
+name: Canonical Contributor Licence Agreement check
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  cla-check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check if CLA signed
+        uses: canonical/has-signed-canonical-cla@v2

.github/workflows/markdown-style-checks.yml

@@ -16,9 +16,12 @@ jobs:
   markdown-lint:
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         fetch-depth: 0
-    - uses: DavidAnson/markdownlint-cli2-action@v16
-      with:
-        config: "docs/.sphinx/.markdownlint.json"
+    - name: Create venv
+      working-directory: "docs"
+      run: make install
+    - name: Lint markdown
+      working-directory: "docs"
+      run: make lint-md

.github/workflows/sphinx-python-dependency-build-checks.yml

@@ -0,0 +1,51 @@
+# The purpose of this workflow file is to confirm that the Sphinx
+# virtual environment can be built from source, consequently documenting
+# the packages required in the build environment to do that.
+#
+# This is needed because some projects embeds the documentation into built
+# artifacts which involves rendering the documentation on the target
+# architecture.
+#
+# Depending on the architecture, pip may or may not have already built wheels
+# available, and as such we need to make sure building wheels from source can
+# succeed.
+name: Sphinx python dependency build checks
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+  workflow_dispatch: # manual trigger
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    name: build
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v5
+
+    - name: Install dependencies
+      run: |
+        set -ex
+        sudo apt-get --fix-missing update
+        sudo apt-get -y install \
+          cargo \
+          libpython3-dev \
+          libxml2-dev \
+          libxslt1-dev \
+          make \
+          python3-venv \
+          rustc \
+          libtiff5-dev libjpeg8-dev libopenjp2-7-dev zlib1g-dev libfreetype6-dev liblcms2-dev libwebp-dev tcl8.6-dev tk8.6-dev python3-tk libharfbuzz-dev libfribidi-dev libxcb1-dev
+    - name: Build Sphinx venv
+      working-directory: "docs"
+      run: |
+        set -ex
+        make install \
+          PIPOPTS="--no-binary :all:" \
+          || ( cat .sphinx/venv/pip_install.log && exit 1 )