[CI/Build] Add sphinx/rst linter for docs (#10366)

.github/workflows/sphinx-lint.yml

+name: Lint documentation
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - "docs/**"
+  pull_request:
+    branches:
+      - main
+    paths:
+      - "docs/**"
+
+jobs:
+  sphinx-lint:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.12"]
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b # v5.3.0
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements-lint.txt
+      - name: Linting docs
+        run: tools/sphinx-lint.sh

format.sh

@@ -41,6 +41,7 @@ MYPY_VERSION=$(mypy --version | awk '{print $2}')
 CODESPELL_VERSION=$(codespell --version)
 ISORT_VERSION=$(isort --vn)
 CLANGFORMAT_VERSION=$(clang-format --version | awk '{print $3}')
+SPHINX_LINT_VERSION=$(sphinx-lint --version | awk '{print $2}')
 
 # # params: tool name, tool version, required version
 tool_version_check() {
@@ -57,6 +58,7 @@ tool_version_check "mypy" "$MYPY_VERSION"
 tool_version_check "isort" "$ISORT_VERSION"
 tool_version_check "codespell" "$CODESPELL_VERSION"
 tool_version_check "clang-format" "$CLANGFORMAT_VERSION"
+tool_version_check "sphinx-lint" "$SPHINX_LINT_VERSION"
 
 YAPF_FLAGS=(
     '--recursive'
@@ -313,3 +315,7 @@ if ! git diff --quiet &>/dev/null; then
 else
     echo "✨🎉 Format check passed! Congratulations! 🎉✨"
 fi
+
+echo 'vLLM sphinx-lint:'
+tools/sphinx-lint.sh
+echo 'vLLM sphinx-lint: Done'

requirements-lint.txt

@@ -6,6 +6,7 @@ ruff==0.6.5
 codespell==2.3.0
 isort==5.13.2
 clang-format==18.1.5
+sphinx-lint==1.0.0
 
 # type checking
 mypy==1.11.1

tools/sphinx-lint.sh

+#!/bin/bash
+
+sphinx-lint --disable trailing-whitespace,missing-final-newline docs