langchain/.github/workflows/check_diffs.yml

name: '🔧 CI'

on:
  push:
    branches: [master]
  pull_request:
  merge_group:

# Optimizes CI performance by canceling redundant workflow runs
# If another push to the same PR or branch happens while this workflow is still running,
# cancel the earlier run in favor of the next run.
#
# There's no point in testing an outdated version of the code. GitHub only allows
# a limited number of job runners to be active at the same time, so it's better to cancel
# pointless jobs early so that more useful jobs can run sooner.
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

env:
  UV_FROZEN: "true"
  UV_NO_SYNC: "true"

jobs:
  # This job analyzes which files changed and creates a dynamic test matrix
  # to only run tests/lints for the affected packages, improving CI efficiency
  build:
    name: 'Detect Changes & Set Matrix'
    runs-on: ubuntu-latest
    if: ${{ !contains(github.event.pull_request.labels.*.name, 'ci-ignore') }}
    steps:
      - name: '📋 Checkout Code'
        uses: actions/checkout@v5
      - name: '🐍 Setup Python 3.11'
        uses: actions/setup-python@v6
        with:
          python-version: '3.11'
      - name: '📂 Get Changed Files'
        id: files
        uses: Ana06/get-changed-files@v2.3.0
      - name: '🔍 Analyze Changed Files & Generate Build Matrix'
        id: set-matrix
        run: |
          python -m pip install packaging requests
          python .github/scripts/check_diff.py ${{ steps.files.outputs.all }} >> $GITHUB_OUTPUT
    outputs:
      lint: ${{ steps.set-matrix.outputs.lint }}
      test: ${{ steps.set-matrix.outputs.test }}
      extended-tests: ${{ steps.set-matrix.outputs.extended-tests }}
      compile-integration-tests: ${{ steps.set-matrix.outputs.compile-integration-tests }}
      dependencies: ${{ steps.set-matrix.outputs.dependencies }}
      test-doc-imports: ${{ steps.set-matrix.outputs.test-doc-imports }}
      test-pydantic: ${{ steps.set-matrix.outputs.test-pydantic }}
      codspeed: ${{ steps.set-matrix.outputs.codspeed }}
  # Run linting only on packages that have changed files
  lint:
    needs: [ build ]
    if: ${{ needs.build.outputs.lint != '[]' }}
    strategy:
      matrix:
        job-configs: ${{ fromJson(needs.build.outputs.lint) }}
      fail-fast: false
    uses: ./.github/workflows/_lint.yml
    with:
      working-directory: ${{ matrix.job-configs.working-directory }}
      python-version: ${{ matrix.job-configs.python-version }}
    secrets: inherit

  # Run unit tests only on packages that have changed files
  test:
    needs: [ build ]
    if: ${{ needs.build.outputs.test != '[]' }}
    strategy:
      matrix:
        job-configs: ${{ fromJson(needs.build.outputs.test) }}
      fail-fast: false
    uses: ./.github/workflows/_test.yml
    with:
      working-directory: ${{ matrix.job-configs.working-directory }}
      python-version: ${{ matrix.job-configs.python-version }}
    secrets: inherit

  # Test compatibility with different Pydantic versions for affected packages
  test-pydantic:
    needs: [ build ]
    if: ${{ needs.build.outputs.test-pydantic != '[]' }}
    strategy:
      matrix:
        job-configs: ${{ fromJson(needs.build.outputs.test-pydantic) }}
      fail-fast: false
    uses: ./.github/workflows/_test_pydantic.yml
    with:
      working-directory: ${{ matrix.job-configs.working-directory }}
      pydantic-version: ${{ matrix.job-configs.pydantic-version }}
    secrets: inherit

  test-doc-imports:
    needs: [ build ]
    if: ${{ needs.build.outputs.test-doc-imports != '[]' }}
    strategy:
      matrix:
        job-configs: ${{ fromJson(needs.build.outputs.test-doc-imports) }}
      fail-fast: false
    uses: ./.github/workflows/_test_doc_imports.yml
    with:
      python-version: ${{ matrix.job-configs.python-version }}
    secrets: inherit

  # Verify integration tests compile without actually running them (faster feedback)
  compile-integration-tests:
    needs: [ build ]
    if: ${{ needs.build.outputs.compile-integration-tests != '[]' }}
    strategy:
      matrix:
        job-configs: ${{ fromJson(needs.build.outputs.compile-integration-tests) }}
      fail-fast: false
    uses: ./.github/workflows/_compile_integration_test.yml
    with:
      working-directory: ${{ matrix.job-configs.working-directory }}
      python-version: ${{ matrix.job-configs.python-version }}
    secrets: inherit

  # Run extended test suites that require additional dependencies
  extended-tests:
    name: 'Extended Tests'
    needs: [ build ]
    if: ${{ needs.build.outputs.extended-tests != '[]' }}
    strategy:
      matrix:
        # note different variable for extended test dirs
        job-configs: ${{ fromJson(needs.build.outputs.extended-tests) }}
      fail-fast: false
    runs-on: ubuntu-latest
    timeout-minutes: 20
    defaults:
      run:
        working-directory: ${{ matrix.job-configs.working-directory }}
    steps:
      - uses: actions/checkout@v5

      - name: '🐍 Set up Python ${{ matrix.job-configs.python-version }} + UV'
        uses: "./.github/actions/uv_setup"
        with:
          python-version: ${{ matrix.job-configs.python-version }}
          cache-suffix: extended-tests-${{ matrix.job-configs.working-directory }}
          working-directory: ${{ matrix.job-configs.working-directory }}

      - name: '📦 Install Dependencies & Run Extended Tests'
        shell: bash
        run: |
          echo "Running extended tests, installing dependencies with uv..."
          uv venv
          uv sync --group test
          VIRTUAL_ENV=.venv uv pip install -r extended_testing_deps.txt
          VIRTUAL_ENV=.venv make extended_tests

      - name: '🧹 Verify Clean Working Directory'
        shell: bash
        run: |
          set -eu

          STATUS="$(git status)"
          echo "$STATUS"

          # grep will exit non-zero if the target message isn't found,
          # and `set -e` above will cause the step to fail.
          echo "$STATUS" | grep 'nothing to commit, working tree clean'

  # Run codspeed benchmarks only on packages that have changed files
  codspeed:
    name: '⚡ CodSpeed Benchmarks'
    needs: [ build ]
    if: ${{ needs.build.outputs.codspeed != '[]' && !contains(github.event.pull_request.labels.*.name, 'codspeed-ignore') }}
    runs-on: ubuntu-latest
    strategy:
      matrix:
        job-configs: ${{ fromJson(needs.build.outputs.codspeed) }}
      fail-fast: false
    steps:
      - uses: actions/checkout@v5

      # We have to use 3.12 as 3.13 is not yet supported
      - name: '📦 Install UV Package Manager'
        uses: astral-sh/setup-uv@v6
        with:
          python-version: "3.12"

      - uses: actions/setup-python@v6
        with:
          python-version: "3.12"

      - name: '📦 Install Test Dependencies'
        run: uv sync --group test
        working-directory: ${{ matrix.job-configs.working-directory }}

      - name: '⚡ Run Benchmarks: ${{ matrix.job-configs.working-directory }}'
        uses: CodSpeedHQ/action@v4
        with:
          token: ${{ secrets.CODSPEED_TOKEN }}
          run: |
            cd ${{ matrix.job-configs.working-directory }}
            if [ "${{ matrix.job-configs.working-directory }}" = "libs/core" ]; then
              uv run --no-sync pytest ./tests/benchmarks --codspeed
            else
              uv run --no-sync pytest ./tests/ --codspeed
            fi
          mode: ${{ matrix.job-configs.working-directory == 'libs/core' && 'walltime' || 'instrumentation' }}

  # Final status check - ensures all required jobs passed before allowing merge
  ci_success:
    name: '✅ CI Success'
    needs: [build, lint, test, compile-integration-tests, extended-tests, test-doc-imports, test-pydantic, codspeed]
    if: |
      always()
    runs-on: ubuntu-latest
    env:
      JOBS_JSON: ${{ toJSON(needs) }}
      RESULTS_JSON: ${{ toJSON(needs.*.result) }}
      EXIT_CODE: ${{!contains(needs.*.result, 'failure') && !contains(needs.*.result, 'cancelled') && '0' || '1'}}
    steps:
      - name: '🎉 All Checks Passed'
        run: |
          echo $JOBS_JSON
          echo $RESULTS_JSON
          echo "Exiting with $EXIT_CODE"
          exit $EXIT_CODE