ci: add workflow to regenerate models from OpenAPI spec

.github/workflows/regenerate_models.yaml

@@ -0,0 +1,169 @@
+# This workflow regenerates Pydantic models (src/apify_client/_models.py) from the OpenAPI spec whenever
+# the spec changes in a apify/apify-docs PR. It is triggered via workflow_dispatch from the apify-docs CI pipeline.
+
+name: Regenerate models from OpenAPI spec
+
+on:
+  workflow_dispatch:
+    inputs:
+      docs_pr_number:
+        description: PR number in apify/apify-docs that triggered this workflow
+        required: true
+        type: string
+      docs_pr_sha:
+        description: Commit SHA from the apify/apify-docs PR
+        required: true
+        type: string
+
+permissions:
+  contents: write
+  pull-requests: write
+
+concurrency:
+  group: regenerate-models-${{ inputs.docs_pr_number }}
+  cancel-in-progress: true
+
+jobs:
+  regenerate-models:
+    name: Regenerate models
+    runs-on: ubuntu-latest
+
+    env:
+      GITHUB_TOKEN: ${{ secrets.APIFY_SERVICE_ACCOUNT_GITHUB_TOKEN }}
+      DOCS_PR_NUMBER: ${{ inputs.docs_pr_number }}
+      DOCS_PR_SHA: ${{ inputs.docs_pr_sha }}
+
+    steps:
+      - name: Validate inputs
+        run: |
+          if ! [[ "$DOCS_PR_NUMBER" =~ ^[0-9]+$ ]]; then
+            echo "::error::docs_pr_number must be a positive integer, got: $DOCS_PR_NUMBER"
+            exit 1
+          fi
+          if ! [[ "$DOCS_PR_SHA" =~ ^[a-f0-9]{40}$ ]]; then
+            echo "::error::docs_pr_sha must be a 40-character hex SHA, got: $DOCS_PR_SHA"
+            exit 1
+          fi
+
+      - name: Checkout apify-client-python
+        uses: actions/checkout@v6
+
+      - name: Checkout apify-docs at PR commit
+        uses: actions/checkout@v6
+        with:
+          repository: apify/apify-docs
+          ref: ${{ inputs.docs_pr_sha }}
+          path: apify-docs
+          token: ${{ secrets.APIFY_SERVICE_ACCOUNT_GITHUB_TOKEN }}
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: 24
+          cache: npm
+          cache-dependency-path: apify-docs/package-lock.json
+
+      # Build the bundled OpenAPI JSON from the docs repo sources. This requires Node.js because the spec
+      # is assembled by the docs build tooling.
+      - name: Build OpenAPI spec bundle
+        run: |
+          cd apify-docs
+          corepack enable
+          npm ci --force
+          npm run openapi:build:json
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      - name: Set up uv
+        uses: astral-sh/setup-uv@v6
+
+      # We call datamodel-codegen with --input pointing at the locally built spec.
+      - name: Generate models from local spec
+        run: uv run datamodel-codegen --input apify-docs/static/api/openapi.json
+
+      - name: Check for changes
+        id: changes
+        run: |
+          if git diff --exit-code src/apify_client/_models.py; then
+            echo "No changes in generated models"
+            echo "changed=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "Models have changed"
+            echo "changed=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Configure git
+        if: steps.changes.outputs.changed == 'true'
+        run: |
+          git config user.name "apify-service-account"
+          git config user.email "apify-service-account@users.noreply.github.com"
+
+      - name: Create or update PR
+        if: steps.changes.outputs.changed == 'true'
+        id: pr
+        run: |
+          BRANCH="update-models-docs-pr-${DOCS_PR_NUMBER}"
+          DOCS_PR_URL="https://github.com/apify/apify-docs/pull/${DOCS_PR_NUMBER}"
+          TITLE="[TODO]: update generated models from apify-docs PR #${DOCS_PR_NUMBER}"
+
+          # -B creates the branch or resets it if it already exists (re-runs for the same docs PR).
+          git checkout -B "$BRANCH"
+          git add src/apify_client/_models.py
+          git commit -m "$TITLE"
+          git push --force origin "$BRANCH"
+
+          EXISTING_PR=$(gh pr list --head "$BRANCH" --json url --jq '.[0].url' 2>/dev/null || true)
+
+          if [ -n "$EXISTING_PR" ]; then
+            echo "PR already exists: $EXISTING_PR"
+            echo "pr_url=$EXISTING_PR" >> "$GITHUB_OUTPUT"
+            echo "created=false" >> "$GITHUB_OUTPUT"
+          else
+            BODY=$(cat <<EOF
+          This PR updates the auto-generated Pydantic models based on OpenAPI specification changes in [apify-docs PR #${DOCS_PR_NUMBER}](${DOCS_PR_URL}).
+
+          ## Changes
+
+          - Regenerated \`src/apify_client/_models.py\` using \`datamodel-codegen\`
+
+          ## Source
+
+          - apify-docs PR: ${DOCS_PR_URL}
+          EOF
+            )
+
+            PR_URL=$(gh pr create \
+              --title "$TITLE" \
+              --body "$BODY" \
+              --head "$BRANCH" \
+              --base master)
+            echo "Created PR: $PR_URL"
+            echo "pr_url=$PR_URL" >> "$GITHUB_OUTPUT"
+            echo "created=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      # Post a cross-repo comment on the original docs PR so reviewers know about the corresponding client-python PR.
+      - name: Comment on apify-docs PR
+        if: steps.changes.outputs.changed == 'true'
+        env:
+          PR_CREATED: ${{ steps.pr.outputs.created }}
+          PR_URL: ${{ steps.pr.outputs.pr_url }}
+        run: |
+          if [ "$PR_CREATED" = "true" ]; then
+            COMMENT="A PR to update the Python client models has been created: ${PR_URL}
+
+          This was automatically triggered by OpenAPI specification changes in this PR."
+          else
+            COMMENT="The Python client model PR has been updated with the latest OpenAPI spec changes: ${PR_URL}"
+          fi
+
+          gh pr comment "$DOCS_PR_NUMBER" \
+            --repo apify/apify-docs \
+            --body "$COMMENT"
+
+      - name: Comment on failure
+        if: failure()
+        run: |
+          gh pr comment "$DOCS_PR_NUMBER" \
+            --repo apify/apify-docs \
+            --body "Python client model regeneration failed. [See workflow run](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})."