release.yml

name: Release Python SDK

on:
  workflow_dispatch:
    inputs:
      version:
        description: "Version bump type"
        required: true
        type: choice
        options:
          - patch
          - minor
          - major
          - prepatch
          - preminor
          - premajor
      prerelease_type:
        description: 'Pre-release type (used when version is prepatch/preminor/premajor)'
        type: choice
        default: ""
        options:
          - ""
          - alpha
          - beta
          - rc
      prerelease_increment:
        description: "Pre-release number (e.g., 1 for alpha1). Leave empty to auto-increment or start at 1."
        type: string
        default: ""
      confirm_major:
        description: "Type RELEASE MAJOR to confirm a major or premajor release"
        required: false
        default: ""

permissions:
  contents: write
  id-token: write # Required for PyPI Trusted Publishing via OIDC

concurrency:
  group: python-sdk-release
  cancel-in-progress: false

jobs:
  release-python-sdk:
    runs-on: ubuntu-latest
    environment: protected branches
    steps:
      - name: Verify release ref
        run: |
          if [ "${GITHUB_REF_TYPE}" != "branch" ]; then
            echo "❌ Error: Releases can only be triggered from branches"
            echo "Current ref: ${GITHUB_REF}"
            exit 1
          fi

          if [ "${GITHUB_REF_NAME}" = "main" ]; then
            echo "✅ Official and pre-release releases are allowed from main"
            exit 0
          fi

          case "${INPUTS_VERSION}" in
            prepatch|preminor|premajor)
              ;;
            *)
              echo "❌ Error: Official releases can only be triggered from main branch"
              echo "Current branch: ${GITHUB_REF_NAME}"
              echo "Requested version bump: ${INPUTS_VERSION}"
              exit 1
              ;;
          esac

          if [ -z "${INPUTS_PRERELEASE_TYPE}" ]; then
            echo "❌ Error: Branch releases must specify prerelease_type as alpha, beta, or rc"
            exit 1
          fi

          echo "✅ Pre-release branch release allowed from ${GITHUB_REF_NAME}"
        env:
          INPUTS_VERSION: ${{ inputs.version }}
          INPUTS_PRERELEASE_TYPE: ${{ inputs.prerelease_type }}

      - name: Confirm major release
        if: ${{ inputs.version == 'major' || inputs.version == 'premajor' }}
        run: |
          if [ "${INPUTS_CONFIRM_MAJOR}" != "RELEASE MAJOR" ]; then
            echo "❌ For major/premajor releases, set confirm_major to RELEASE MAJOR"
            exit 1
          fi
        env:
          INPUTS_CONFIRM_MAJOR: ${{ inputs.confirm_major }}

      - name: Checkout repository
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          fetch-depth: 0
          token: ${{ secrets.GH_ACCESS_TOKEN }}
          persist-credentials: false

      - name: Install uv and set Python version
        uses: astral-sh/setup-uv@1c37ad07a6a961277cf70c0d37d6f313000f5884 # v10.3.0
        with:
          version: "0.11.2"
          python-version: "3.12"
          enable-cache: false

      - name: Configure Git
        env:
          GH_ACCESS_TOKEN: ${{ secrets.GH_ACCESS_TOKEN }}
        run: |
          git config user.name "langfuse-bot"
          git config user.email "langfuse-bot@langfuse.com"

          echo "$GH_ACCESS_TOKEN" | gh auth login --with-token
          gh auth setup-git

      - name: Get current version
        id: current-version
        run: |
          current_version=$(uv version --short)
          echo "version=$current_version" >> $GITHUB_OUTPUT
          echo "Current version: $current_version"

      - name: Calculate new version
        id: new-version
        run: |
          current_version="${STEPS_CURRENT_VERSION_OUTPUTS_VERSION}"
          version_type="${INPUTS_VERSION}"
          prerelease_type="${INPUTS_PRERELEASE_TYPE}"
          prerelease_increment="${INPUTS_PRERELEASE_INCREMENT}"

          # Extract base version (strip any pre-release suffix like a1, b2, rc1)
          base_version=$(echo "$current_version" | sed -E 's/(a|b|rc)[0-9]+$//')

          # Parse version components
          IFS='.' read -r major minor patch <<< "$base_version"

          if echo "$current_version" | grep -qE '(a|b|rc)[0-9]+$'; then
            current_is_prerelease="true"
          else
            current_is_prerelease="false"
          fi

          if [ "$version_type" = "premajor" ] || [ "$version_type" = "preminor" ] || [ "$version_type" = "prepatch" ]; then
            if [ -z "$prerelease_type" ]; then
              echo "❌ Error: prerelease_type must be specified when version is a prerelease variant"
              exit 1
            fi

            # Determine the prerelease base version target
            case "$version_type" in
              premajor)
                if [ "$current_is_prerelease" = "true" ] && [ "$minor" -eq 0 ] && [ "$patch" -eq 0 ]; then
                  target_major=$major
                else
                  target_major=$((major + 1))
                fi
                target_minor=0
                target_patch=0
                ;;
              preminor)
                target_major=$major
                if [ "$current_is_prerelease" = "true" ] && [ "$patch" -eq 0 ] && [ "$minor" -gt 0 ]; then
                  target_minor=$minor
                else
                  target_minor=$((minor + 1))
                fi
                target_patch=0
                ;;
              prepatch)
                target_major=$major
                target_minor=$minor
                if [ "$current_is_prerelease" = "true" ] && [ "$patch" -gt 0 ]; then
                  target_patch=$patch
                else
                  target_patch=$((patch + 1))
                fi
                ;;
            esac
            target_base_version="${target_major}.${target_minor}.${target_patch}"

            # Map prerelease type to Python suffix
            case "$prerelease_type" in
              alpha) suffix="a" ;;
              beta) suffix="b" ;;
              rc) suffix="rc" ;;
            esac

            # Determine prerelease number
            if [ -n "$prerelease_increment" ]; then
              pre_num="$prerelease_increment"
            else
              # Check if current version is same type of prerelease, if so increment
              escaped_target_base_version=$(echo "$target_base_version" | sed 's/\./\\./g')
              if echo "$current_version" | grep -qE "^${escaped_target_base_version}${suffix}[0-9]+$"; then
                current_pre_num=$(echo "$current_version" | sed -E "s/^${escaped_target_base_version}${suffix}([0-9]+)$/\1/")
                pre_num=$((current_pre_num + 1))
              else
                pre_num=1
              fi
            fi

            new_version="${target_base_version}${suffix}${pre_num}"
            is_prerelease="true"
          else
            # Standard version bump
            case "$version_type" in
              patch)
                patch=$((patch + 1))
                ;;
              minor)
                minor=$((minor + 1))
                patch=0
                ;;
              major)
                major=$((major + 1))
                minor=0
                patch=0
                ;;
            esac
            new_version="${major}.${minor}.${patch}"
            is_prerelease="false"
          fi

          echo "version=$new_version" >> $GITHUB_OUTPUT
          echo "is_prerelease=$is_prerelease" >> $GITHUB_OUTPUT
          echo "New version: $new_version (prerelease: $is_prerelease)"
        env:
          STEPS_CURRENT_VERSION_OUTPUTS_VERSION: ${{ steps.current-version.outputs.version }}
          INPUTS_VERSION: ${{ inputs.version }}
          INPUTS_PRERELEASE_TYPE: ${{ inputs.prerelease_type }}
          INPUTS_PRERELEASE_INCREMENT: ${{ inputs.prerelease_increment }}

      - name: Check if tag already exists
        run: |
          if git rev-parse "v${STEPS_NEW_VERSION_OUTPUTS_VERSION}" >/dev/null 2>&1; then
            echo "❌ Error: Tag v${STEPS_NEW_VERSION_OUTPUTS_VERSION} already exists"
            exit 1
          fi
          echo "✅ Tag v${STEPS_NEW_VERSION_OUTPUTS_VERSION} does not exist"
        env:
          STEPS_NEW_VERSION_OUTPUTS_VERSION: ${{ steps.new-version.outputs.version }}

      - name: Update version in pyproject.toml
        run: |
          uv version ${STEPS_NEW_VERSION_OUTPUTS_VERSION}
        env:
          STEPS_NEW_VERSION_OUTPUTS_VERSION: ${{ steps.new-version.outputs.version }}

      - name: Verify version consistency
        run: |
          pyproject_version=$(uv version --short)

          echo "pyproject.toml version: $pyproject_version"

          if [ "$pyproject_version" != "${STEPS_NEW_VERSION_OUTPUTS_VERSION}" ]; then
            echo "❌ Error: Version in files doesn't match expected version"
            exit 1
          fi

          echo "✅ Versions are consistent: $pyproject_version"
        env:
          STEPS_NEW_VERSION_OUTPUTS_VERSION: ${{ steps.new-version.outputs.version }}

      - name: Build package
        run: uv build --no-sources

      - name: Verify build artifacts
        run: |
          echo "Verifying build artifacts..."

          if [ ! -d "dist" ]; then
            echo "❌ Error: dist directory not found"
            exit 1
          fi

          wheel_count=$(ls dist/*.whl 2>/dev/null | wc -l)
          sdist_count=$(ls dist/*.tar.gz 2>/dev/null | wc -l)

          if [ "$wheel_count" -eq 0 ]; then
            echo "❌ Error: No wheel file found in dist/"
            exit 1
          fi

          if [ "$sdist_count" -eq 0 ]; then
            echo "❌ Error: No source distribution found in dist/"
            exit 1
          fi

          echo "✅ Build artifacts:"
          ls -lh dist/

          # Verify the version in the built artifacts matches
          expected_version="${STEPS_NEW_VERSION_OUTPUTS_VERSION}"
          wheel_file=$(ls dist/*.whl | head -1)
          if ! echo "$wheel_file" | grep -q "$expected_version"; then
            echo "❌ Error: Wheel filename doesn't contain expected version $expected_version"
            echo "Wheel file: $wheel_file"
            exit 1
          fi
          echo "✅ Artifact version verified"
        env:
          STEPS_NEW_VERSION_OUTPUTS_VERSION: ${{ steps.new-version.outputs.version }}

      - name: Smoke test wheel
        run: |
          uv run --isolated --no-project --with dist/*.whl python -c "from importlib.metadata import version; import langfuse; assert langfuse.__version__ == version('langfuse')"

      - name: Smoke test source distribution
        run: |
          uv run --isolated --no-project --with dist/*.tar.gz python -c "from importlib.metadata import version; import langfuse; assert langfuse.__version__ == version('langfuse')"

      - name: Commit version changes
        run: |
          git add pyproject.toml uv.lock
          git commit -m "chore: release v${STEPS_NEW_VERSION_OUTPUTS_VERSION}"
        env:
          STEPS_NEW_VERSION_OUTPUTS_VERSION: ${{ steps.new-version.outputs.version }}

      - name: Create and push tag
        id: push-tag
        run: |
          git tag "v${STEPS_NEW_VERSION_OUTPUTS_VERSION}"
          git push origin "HEAD:${GITHUB_REF_NAME}"
          git push origin "v${STEPS_NEW_VERSION_OUTPUTS_VERSION}"
        env:
          STEPS_NEW_VERSION_OUTPUTS_VERSION: ${{ steps.new-version.outputs.version }}

      - name: Publish to PyPI
        id: publish-pypi
        run: uv publish --trusted-publishing always

      - name: Create GitHub Release
        run: |
          prerelease_flag=""
          if [ "${IS_PRERELEASE}" = "true" ]; then
            prerelease_flag="--prerelease"
          fi
          gh release create "v${VERSION}" \
            --title "v${VERSION}" \
            --generate-notes \
            $prerelease_flag \
            dist/*.whl dist/*.tar.gz
        env:
          GH_TOKEN: ${{ secrets.GH_ACCESS_TOKEN }}
          VERSION: ${{ steps.new-version.outputs.version }}
          IS_PRERELEASE: ${{ steps.new-version.outputs.is_prerelease }}

      - name: Notify Slack on success
        if: success()
        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
        with:
          webhook: ${{ secrets.SLACK_WEBHOOK_RELEASES }}
          webhook-type: incoming-webhook
          payload: |
            {
              "text": "✅ Langfuse Python SDK v${{ steps.new-version.outputs.version }} published to PyPI",
              "blocks": [
                {
                  "type": "header",
                  "text": {
                    "type": "plain_text",
                    "text": "✅ Langfuse Python SDK Released",
                    "emoji": true
                  }
                },
                {
                  "type": "section",
                  "fields": [
                    {
                      "type": "mrkdwn",
                      "text": "*Version:*\n`v${{ steps.new-version.outputs.version }}`"
                    },
                    {
                      "type": "mrkdwn",
                      "text": "*Type:*\n`${{ inputs.version }}${{ inputs.prerelease_type && format(' ({0})', inputs.prerelease_type) || '' }}`"
                    },
                    {
                      "type": "mrkdwn",
                      "text": "*Released by:*\n${{ github.actor }}"
                    },
                    {
                      "type": "mrkdwn",
                      "text": "*Package:*\n`langfuse`"
                    }
                  ]
                },
                {
                  "type": "actions",
                  "elements": [
                    {
                      "type": "button",
                      "text": {
                        "type": "plain_text",
                        "text": "📋 View Release Notes",
                        "emoji": true
                      },
                      "url": "${{ github.server_url }}/${{ github.repository }}/releases/tag/v${{ steps.new-version.outputs.version }}",
                      "style": "primary"
                    },
                    {
                      "type": "button",
                      "text": {
                        "type": "plain_text",
                        "text": "📦 View on PyPI",
                        "emoji": true
                      },
                      "url": "https://pypi.org/project/langfuse/${{ steps.new-version.outputs.version }}/"
                    },
                    {
                      "type": "button",
                      "text": {
                        "type": "plain_text",
                        "text": "🔧 View Workflow",
                        "emoji": true
                      },
                      "url": "${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
                    }
                  ]
                },
                {
                  "type": "context",
                  "elements": [
                    {
                      "type": "mrkdwn",
                      "text": "🔒 Published with Trusted Publishing (OIDC) • 🤖 Automated release"
                    }
                  ]
                }
              ]
            }

      - name: Notify Slack on failure
        if: failure()
        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
        with:
          webhook: ${{ secrets.SLACK_WEBHOOK_ENGINEERING }}
          webhook-type: incoming-webhook
          payload: |
            {
              "text": "❌ Langfuse Python SDK release workflow failed",
              "blocks": [
                {
                  "type": "header",
                  "text": {
                    "type": "plain_text",
                    "text": "❌ Langfuse Python SDK Release Failed",
                    "emoji": true
                  }
                },
                {
                  "type": "section",
                  "text": {
                    "type": "mrkdwn",
                    "text": "⚠️ The release workflow encountered an error and did not complete successfully."
                  }
                },
                {
                  "type": "section",
                  "fields": [
                    {
                      "type": "mrkdwn",
                      "text": "*Requested Version:*\n`${{ inputs.version }}`"
                    },
                    {
                      "type": "mrkdwn",
                      "text": "*Pre-release Type:*\n${{ inputs.prerelease_type || 'N/A' }}"
                    },
                    {
                      "type": "mrkdwn",
                      "text": "*Triggered by:*\n${{ github.actor }}"
                    },
                    {
                      "type": "mrkdwn",
                      "text": "*Current Version:*\n`${{ steps.current-version.outputs.version }}`"
                    }
                  ]
                },
                {
                  "type": "divider"
                },
                {
                  "type": "section",
                  "text": {
                    "type": "mrkdwn",
                    "text": "*🔍 Troubleshooting:*\n• Check workflow logs for error details\n• Verify PyPI Trusted Publishing is configured correctly\n• Ensure the version doesn't already exist on PyPI\n• Check if the git tag already exists\n• If partially published, check PyPI and GitHub releases"
                  }
                },
                {
                  "type": "actions",
                  "elements": [
                    {
                      "type": "button",
                      "text": {
                        "type": "plain_text",
                        "text": "🔧 View Workflow Logs",
                        "emoji": true
                      },
                      "url": "${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}",
                      "style": "danger"
                    },
                    {
                      "type": "button",
                      "text": {
                        "type": "plain_text",
                        "text": "📖 PyPI Trusted Publishing Docs",
                        "emoji": true
                      },
                      "url": "https://docs.pypi.org/trusted-publishers/"
                    }
                  ]
                },
                {
                  "type": "context",
                  "elements": [
                    {
                      "type": "mrkdwn",
                      "text": "🚨 Action required • Check workflow logs for details"
                    }
                  ]
                }
              ]
            }