_release.yml

name: release
run-name: Release ${{ inputs.working-directory }} by @${{ github.actor }}
on:
  workflow_call:
    inputs:
      working-directory:
        required: true
        type: string
        description: "From which folder this pipeline executes"
  workflow_dispatch:
    inputs:
      working-directory:
        required: true
        type: string
        default: 'libs/langchain'
      dangerous-nonmaster-release:
        required: false
        type: boolean
        default: false
        description: "Release from a non-master branch (danger!)"

env:
  PYTHON_VERSION: "3.11"
  UV_FROZEN: "true"
  UV_NO_SYNC: "true"

jobs:
  build:
    if: github.ref == 'refs/heads/master' || inputs.dangerous-nonmaster-release
    environment: Scheduled testing
    runs-on: ubuntu-latest

    outputs:
      pkg-name: ${{ steps.check-version.outputs.pkg-name }}
      version: ${{ steps.check-version.outputs.version }}

    steps:
      - uses: actions/checkout@v4

      - name: Set up Python + uv
        uses: "./.github/actions/uv_setup"
        with:
          python-version: ${{ env.PYTHON_VERSION }}

      # We want to keep this build stage *separate* from the release stage,
      # so that there's no sharing of permissions between them.
      # The release stage has trusted publishing and GitHub repo contents write access,
      # and we want to keep the scope of that access limited just to the release job.
      # Otherwise, a malicious `build` step (e.g. via a compromised dependency)
      # could get access to our GitHub or PyPI credentials.
      #
      # Per the trusted publishing GitHub Action:
      # > It is strongly advised to separate jobs for building [...]
      # > from the publish job.
      # https://github.com/pypa/gh-action-pypi-publish#non-goals
      - name: Build project for distribution
        run: uv build
        working-directory: ${{ inputs.working-directory }}

      - name: Upload build
        uses: actions/upload-artifact@v4
        with:
          name: dist
          path: ${{ inputs.working-directory }}/dist/

      - name: Check Version
        id: check-version
        shell: python
        working-directory: ${{ inputs.working-directory }}
        run: |
          import os
          import tomllib
          with open("pyproject.toml", "rb") as f:
              data = tomllib.load(f)
          pkg_name = data["project"]["name"]
          version = data["project"]["version"]
          with open(os.environ["GITHUB_OUTPUT"], "a") as f:
              f.write(f"pkg-name={pkg_name}\n")
              f.write(f"version={version}\n")
  release-notes:
    needs:
      - build
    runs-on: ubuntu-latest
    outputs:
      release-body: ${{ steps.generate-release-body.outputs.release-body }}
    steps:
      - uses: actions/checkout@v4
        with:
          repository: langchain-ai/langchain
          path: langchain
          sparse-checkout: | # this only grabs files for relevant dir
            ${{ inputs.working-directory }}
          ref: ${{ github.ref }} # this scopes to just ref'd branch
          fetch-depth: 0 # this fetches entire commit history
      - name: Check Tags
        id: check-tags
        shell: bash
        working-directory: langchain/${{ inputs.working-directory }}
        env:
          PKG_NAME: ${{ needs.build.outputs.pkg-name }}
          VERSION: ${{ needs.build.outputs.version }}
        run: |
          PREV_TAG="$PKG_NAME==${VERSION%.*}.$(( ${VERSION##*.} - 1 ))"; [[ "${VERSION##*.}" -eq 0 ]] && PREV_TAG=""

          # backup case if releasing e.g. 0.3.0, looks up last release
          # note if last release (chronologically) was e.g. 0.1.47 it will get 
          # that instead of the last 0.2 release
          if [ -z "$PREV_TAG" ]; then
            REGEX="^$PKG_NAME==\\d+\\.\\d+\\.\\d+\$"
            echo $REGEX
            PREV_TAG=$(git tag --sort=-creatordate | (grep -P $REGEX || true) | head -1)
          fi

          # if PREV_TAG is empty, let it be empty
          if [ -z "$PREV_TAG" ]; then
            echo "No previous tag found - first release"
          else
            # confirm prev-tag actually exists in git repo with git tag
            GIT_TAG_RESULT=$(git tag -l "$PREV_TAG")
            if [ -z "$GIT_TAG_RESULT" ]; then
              echo "Previous tag $PREV_TAG not found in git repo"
              exit 1
            fi
          fi


          TAG="${PKG_NAME}==${VERSION}"
          if [ "$TAG" == "$PREV_TAG" ]; then
            echo "No new version to release"
            exit 1
          fi
          echo tag="$TAG" >> $GITHUB_OUTPUT
          echo prev-tag="$PREV_TAG" >> $GITHUB_OUTPUT
      - name: Generate release body
        id: generate-release-body
        working-directory: langchain
        env:
          WORKING_DIR: ${{ inputs.working-directory }}
          PKG_NAME: ${{ needs.build.outputs.pkg-name }}
          TAG: ${{ steps.check-tags.outputs.tag }}
          PREV_TAG: ${{ steps.check-tags.outputs.prev-tag }}
        run: |
          PREAMBLE="Changes since $PREV_TAG"
          # if PREV_TAG is empty, then we are releasing the first version
          if [ -z "$PREV_TAG" ]; then
            PREAMBLE="Initial release"
            PREV_TAG=$(git rev-list --max-parents=0 HEAD)
          fi
          {
            echo 'release-body<<EOF'
            echo $PREAMBLE
            echo
            git log --format="%s" "$PREV_TAG"..HEAD -- $WORKING_DIR
            echo EOF
          } >> "$GITHUB_OUTPUT"

  test-pypi-publish:
    needs:
      - build
      - release-notes
    uses:
      ./.github/workflows/_test_release.yml
    permissions: write-all
    with:
      working-directory: ${{ inputs.working-directory }}
      dangerous-nonmaster-release: ${{ inputs.dangerous-nonmaster-release }}
    secrets: inherit

  pre-release-checks:
    needs:
      - build
      - release-notes
      - test-pypi-publish
    runs-on: ubuntu-latest
    timeout-minutes: 20
    steps:
      - uses: actions/checkout@v4

      # We explicitly *don't* set up caching here. This ensures our tests are
      # maximally sensitive to catching breakage.
      #
      # For example, here's a way that caching can cause a falsely-passing test:
      # - Make the langchain package manifest no longer list a dependency package
      #   as a requirement. This means it won't be installed by `pip install`,
      #   and attempting to use it would cause a crash.
      # - That dependency used to be required, so it may have been cached.
      #   When restoring the venv packages from cache, that dependency gets included.
      # - Tests pass, because the dependency is present even though it wasn't specified.
      # - The package is published, and it breaks on the missing dependency when
      #   used in the real world.

      - name: Set up Python + uv
        uses: "./.github/actions/uv_setup"
        id: setup-python
        with:
          python-version: ${{ env.PYTHON_VERSION }}

      - uses: actions/download-artifact@v4
        with:
          name: dist
          path: ${{ inputs.working-directory }}/dist/

      - name: Import dist package
        shell: bash
        working-directory: ${{ inputs.working-directory }}
        env:
          PKG_NAME: ${{ needs.build.outputs.pkg-name }}
          VERSION: ${{ needs.build.outputs.version }}
        # Here we use:
        # - The default regular PyPI index as the *primary* index, meaning
        #   that it takes priority (https://pypi.org/simple)
        # - The test PyPI index as an extra index, so that any dependencies that
        #   are not found on test PyPI can be resolved and installed anyway.
        #   (https://test.pypi.org/simple). This will include the PKG_NAME==VERSION
        #   package because VERSION will not have been uploaded to regular PyPI yet.
        # - attempt install again after 5 seconds if it fails because there is
        #   sometimes a delay in availability on test pypi
        run: |
          uv venv
          VIRTUAL_ENV=.venv uv pip install dist/*.whl

          # Replace all dashes in the package name with underscores,
          # since that's how Python imports packages with dashes in the name.
          # also remove _official suffix
          IMPORT_NAME="$(echo "$PKG_NAME" | sed s/-/_/g | sed s/_official//g)"

          uv run python -c "import $IMPORT_NAME; print(dir($IMPORT_NAME))"

      - name: Import test dependencies
        run: uv sync --group test
        working-directory: ${{ inputs.working-directory }}

      # Overwrite the local version of the package with the built version
      - name: Import published package (again)
        working-directory: ${{ inputs.working-directory }}
        shell: bash
        env:
          PKG_NAME: ${{ needs.build.outputs.pkg-name }}
          VERSION: ${{ needs.build.outputs.version }}
        run: |
          VIRTUAL_ENV=.venv uv pip install dist/*.whl

      - name: Run unit tests
        run: make tests
        working-directory: ${{ inputs.working-directory }}

      - name: Check for prerelease versions
        working-directory: ${{ inputs.working-directory }}
        run: |
          uv run python $GITHUB_WORKSPACE/.github/scripts/check_prerelease_dependencies.py pyproject.toml

      - name: Get minimum versions
        working-directory: ${{ inputs.working-directory }}
        id: min-version
        run: |
          VIRTUAL_ENV=.venv uv pip install packaging requests
          python_version="$(uv run python --version | awk '{print $2}')"
          min_versions="$(uv run python $GITHUB_WORKSPACE/.github/scripts/get_min_versions.py pyproject.toml release $python_version)"
          echo "min-versions=$min_versions" >> "$GITHUB_OUTPUT"
          echo "min-versions=$min_versions"

      - name: Run unit tests with minimum dependency versions
        if: ${{ steps.min-version.outputs.min-versions != '' }}
        env:
          MIN_VERSIONS: ${{ steps.min-version.outputs.min-versions }}
        run: |
          VIRTUAL_ENV=.venv uv pip install --force-reinstall $MIN_VERSIONS --editable .
          make tests
        working-directory: ${{ inputs.working-directory }}

      - name: Import integration test dependencies
        run: uv sync --group test --group test_integration
        working-directory: ${{ inputs.working-directory }}

      - name: Run integration tests
        if: ${{ startsWith(inputs.working-directory, 'libs/partners/') }}
        env:
          AI21_API_KEY: ${{ secrets.AI21_API_KEY }}
          GOOGLE_API_KEY: ${{ secrets.GOOGLE_API_KEY }}
          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
          MISTRAL_API_KEY: ${{ secrets.MISTRAL_API_KEY }}
          TOGETHER_API_KEY: ${{ secrets.TOGETHER_API_KEY }}
          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
          AZURE_OPENAI_API_VERSION: ${{ secrets.AZURE_OPENAI_API_VERSION }}
          AZURE_OPENAI_API_BASE: ${{ secrets.AZURE_OPENAI_API_BASE }}
          AZURE_OPENAI_API_KEY: ${{ secrets.AZURE_OPENAI_API_KEY }}
          AZURE_OPENAI_CHAT_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_CHAT_DEPLOYMENT_NAME }}
          AZURE_OPENAI_LEGACY_CHAT_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_LEGACY_CHAT_DEPLOYMENT_NAME }}
          AZURE_OPENAI_LLM_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_LLM_DEPLOYMENT_NAME }}
          AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME }}
          NVIDIA_API_KEY: ${{ secrets.NVIDIA_API_KEY }}
          GOOGLE_SEARCH_API_KEY: ${{ secrets.GOOGLE_SEARCH_API_KEY }}
          GOOGLE_CSE_ID: ${{ secrets.GOOGLE_CSE_ID }}
          GROQ_API_KEY: ${{ secrets.GROQ_API_KEY }}
          HUGGINGFACEHUB_API_TOKEN: ${{ secrets.HUGGINGFACEHUB_API_TOKEN }}
          EXA_API_KEY: ${{ secrets.EXA_API_KEY }}
          NOMIC_API_KEY: ${{ secrets.NOMIC_API_KEY }}
          WATSONX_APIKEY: ${{ secrets.WATSONX_APIKEY }}
          WATSONX_PROJECT_ID: ${{ secrets.WATSONX_PROJECT_ID }}
          PINECONE_API_KEY: ${{ secrets.PINECONE_API_KEY }}
          PINECONE_ENVIRONMENT: ${{ secrets.PINECONE_ENVIRONMENT }}
          ASTRA_DB_API_ENDPOINT: ${{ secrets.ASTRA_DB_API_ENDPOINT }}
          ASTRA_DB_APPLICATION_TOKEN: ${{ secrets.ASTRA_DB_APPLICATION_TOKEN }}
          ASTRA_DB_KEYSPACE: ${{ secrets.ASTRA_DB_KEYSPACE }}
          ES_URL: ${{ secrets.ES_URL }}
          ES_CLOUD_ID: ${{ secrets.ES_CLOUD_ID }}
          ES_API_KEY: ${{ secrets.ES_API_KEY }}
          MONGODB_ATLAS_URI: ${{ secrets.MONGODB_ATLAS_URI }}
          VOYAGE_API_KEY: ${{ secrets.VOYAGE_API_KEY }}
          UPSTAGE_API_KEY: ${{ secrets.UPSTAGE_API_KEY }}
          FIREWORKS_API_KEY: ${{ secrets.FIREWORKS_API_KEY }}
          XAI_API_KEY: ${{ secrets.XAI_API_KEY }}
          DEEPSEEK_API_KEY: ${{ secrets.DEEPSEEK_API_KEY }}
        run: make integration_tests
        working-directory: ${{ inputs.working-directory }}

  publish:
    needs:
      - build
      - release-notes
      - test-pypi-publish
      - pre-release-checks
    runs-on: ubuntu-latest
    permissions:
      # This permission is used for trusted publishing:
      # https://blog.pypi.org/posts/2023-04-20-introducing-trusted-publishers/
      #
      # Trusted publishing has to also be configured on PyPI for each package:
      # https://docs.pypi.org/trusted-publishers/adding-a-publisher/
      id-token: write

    defaults:
      run:
        working-directory: ${{ inputs.working-directory }}

    steps:
      - uses: actions/checkout@v4

      - name: Set up Python + uv
        uses: "./.github/actions/uv_setup"
        with:
          python-version: ${{ env.PYTHON_VERSION }}

      - uses: actions/download-artifact@v4
        with:
          name: dist
          path: ${{ inputs.working-directory }}/dist/

      - name: Publish package distributions to PyPI
        uses: pypa/gh-action-pypi-publish@release/v1
        with:
          packages-dir: ${{ inputs.working-directory }}/dist/
          verbose: true
          print-hash: true
          # Temp workaround since attestations are on by default as of gh-action-pypi-publish v1.11.0
          attestations: false

  mark-release:
    needs:
      - build
      - release-notes
      - test-pypi-publish
      - pre-release-checks
      - publish
    runs-on: ubuntu-latest
    permissions:
      # This permission is needed by `ncipollo/release-action` to
      # create the GitHub release.
      contents: write

    defaults:
      run:
        working-directory: ${{ inputs.working-directory }}

    steps:
      - uses: actions/checkout@v4

      - name: Set up Python + uv
        uses: "./.github/actions/uv_setup"
        with:
          python-version: ${{ env.PYTHON_VERSION }}

      - uses: actions/download-artifact@v4
        with:
          name: dist
          path: ${{ inputs.working-directory }}/dist/
          
      - name: Create Tag
        uses: ncipollo/release-action@v1
        with:
          artifacts: "dist/*"
          token: ${{ secrets.GITHUB_TOKEN }}
          generateReleaseNotes: false
          tag: ${{needs.build.outputs.pkg-name}}==${{ needs.build.outputs.version }}
          body: ${{ needs.release-notes.outputs.release-body }}
          commit: ${{ github.sha }}
          makeLatest: ${{ needs.build.outputs.pkg-name == 'langchain-core'}}