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ci: add workflow for manually building API ref for v0.3 (#33241)
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# Build the API reference documentation for v0.3 branch.
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#
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# Manual trigger only.
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#
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# Built HTML pushed to langchain-ai/langchain-api-docs-html.
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#
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# Looks for langchain-ai org repos in packages.yml and checks them out.
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# Calls prep_api_docs_build.py.
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name: "📚 API Docs (v0.3)"
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run-name: "Build & Deploy API Reference (v0.3)"
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on:
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workflow_dispatch:
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env:
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PYTHON_VERSION: "3.11"
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jobs:
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build:
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if: github.repository == 'langchain-ai/langchain' || github.event_name != 'schedule'
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runs-on: ubuntu-latest
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permissions:
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contents: read
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steps:
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- uses: actions/checkout@v5
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with:
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ref: v0.3
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path: langchain
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- uses: actions/checkout@v5
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with:
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repository: langchain-ai/langchain-api-docs-html
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path: langchain-api-docs-html
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token: ${{ secrets.TOKEN_GITHUB_API_DOCS_HTML }}
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- name: "📋 Extract Repository List with yq"
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id: get-unsorted-repos
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uses: mikefarah/yq@master
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with:
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cmd: |
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# Extract repos from packages.yml that are in the langchain-ai org
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# (excluding 'langchain' itself)
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yq '
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.packages[]
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| select(
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(
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(.repo | test("^langchain-ai/"))
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and
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(.repo != "langchain-ai/langchain")
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)
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or
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(.include_in_api_ref // false)
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)
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| .repo
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' langchain/libs/packages.yml
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- name: "📋 Parse YAML & Checkout Repositories"
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env:
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REPOS_UNSORTED: ${{ steps.get-unsorted-repos.outputs.result }}
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GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
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run: |
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# Get unique repositories
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REPOS=$(echo "$REPOS_UNSORTED" | sort -u)
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# Checkout each unique repository
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for repo in $REPOS; do
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# Validate repository format (allow any org with proper format)
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if [[ ! "$repo" =~ ^[a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+$ ]]; then
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echo "Error: Invalid repository format: $repo"
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exit 1
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fi
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REPO_NAME=$(echo $repo | cut -d'/' -f2)
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# Additional validation for repo name
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if [[ ! "$REPO_NAME" =~ ^[a-zA-Z0-9_.-]+$ ]]; then
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echo "Error: Invalid repository name: $REPO_NAME"
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exit 1
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fi
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echo "Checking out $repo to $REPO_NAME"
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git clone --depth 1 https://github.com/$repo.git $REPO_NAME
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done
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- name: "🐍 Setup Python ${{ env.PYTHON_VERSION }}"
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uses: actions/setup-python@v6
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id: setup-python
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with:
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python-version: ${{ env.PYTHON_VERSION }}
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- name: "📦 Install Initial Python Dependencies using uv"
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working-directory: langchain
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run: |
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python -m pip install -U uv
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python -m uv pip install --upgrade --no-cache-dir pip setuptools pyyaml
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- name: "📦 Organize Library Directories"
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# Places cloned partner packages into libs/partners structure
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run: python langchain/.github/scripts/prep_api_docs_build.py
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- name: "🧹 Clear Prior Build"
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run:
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# Remove artifacts from prior docs build
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rm -rf langchain-api-docs-html/api_reference_build/html
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- name: "📦 Install Documentation Dependencies using uv"
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working-directory: langchain
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run: |
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# Install all partner packages in editable mode with overrides
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python -m uv pip install $(ls ./libs/partners | xargs -I {} echo "./libs/partners/{}") --overrides ./docs/vercel_overrides.txt
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# Install core langchain and other main packages
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python -m uv pip install libs/core libs/langchain libs/text-splitters libs/community libs/experimental libs/standard-tests
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# Install Sphinx and related packages for building docs
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python -m uv pip install -r docs/api_reference/requirements.txt
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- name: "🔧 Configure Git Settings"
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working-directory: langchain
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run: |
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git config --local user.email "[email protected]"
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git config --local user.name "Github Actions"
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- name: "📚 Build API Documentation"
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working-directory: langchain
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run: |
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# Generate the API reference RST files
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python docs/api_reference/create_api_rst.py
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# Build the HTML documentation using Sphinx
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# -T: show full traceback on exception
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# -E: don't use cached environment (force rebuild, ignore cached doctrees)
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# -b html: build HTML docs (vs PDS, etc.)
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# -d: path for the cached environment (parsed document trees / doctrees)
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# - Separate from output dir for faster incremental builds
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# -c: path to conf.py
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# -j auto: parallel build using all available CPU cores
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python -m sphinx -T -E -b html -d ../langchain-api-docs-html/_build/doctrees -c docs/api_reference docs/api_reference ../langchain-api-docs-html/api_reference_build/html -j auto
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# Post-process the generated HTML
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python docs/api_reference/scripts/custom_formatter.py ../langchain-api-docs-html/api_reference_build/html
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# Default index page is blank so we copy in the actual home page.
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cp ../langchain-api-docs-html/api_reference_build/html/{reference,index}.html
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# Removes Sphinx's intermediate build artifacts after the build is complete.
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rm -rf ../langchain-api-docs-html/_build/
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# Commit and push changes to langchain-api-docs-html repo
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- uses: EndBug/add-and-commit@v9
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with:
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cwd: langchain-api-docs-html
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message: "Update API docs build from v0.3 branch"

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