Optimize preview workflows (#407)

Author: reakaleek

.github/workflows/preview-build.yml

@@ -6,13 +6,13 @@ on:
     inputs:
       strict:
         description: 'Treat warnings as errors'
-        type: boolean
-        default: true
+        type: string
+        default: 'true'
       continue-on-error:
         description: 'Do not fail to publish if build fails'
-        type: boolean
+        type: string
         required: false
-        default: true
+        default: 'true'
 
 permissions: 
   contents: read
@@ -23,6 +23,29 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with: 
+          persist-credentials: false
+          
+      - name: Store PR data
+        env:
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          PR_REF: ${{ github.event.pull_request.head.sha }}
+        run: |
+          cat << EOF > pull_request.json
+          {
+            "number": ${PR_NUMBER},
+            "ref": "${PR_REF}"
+          }
+          EOF
+      
+      - name: Upload PR data
+        uses: actions/upload-artifact@v4
+        with:
+          name: pull-request-data
+          path: pull_request.json
+          if-no-files-found: error
+          retention-days: 1
+          compression-level: 1
 
       - name: Bootstrap Action Workspace
         if: github.repository == 'elastic/docs-builder'
@@ -40,18 +63,16 @@ jobs:
       - name: Build documentation
         if: github.repository != 'elastic/docs-builder'
         uses: elastic/docs-builder@main
-        continue-on-error: true
+        continue-on-error: ${{ fromJSON(inputs.continue-on-error != '' && inputs.continue-on-error || 'false') }}
         with:
           prefix: "/${{ github.repository }}/pull/${{ github.event.pull_request.number }}"
-          strict: true
-      - name: Add pull request number to build
-        env:
-          PR_NUMBER: ${{ github.event.pull_request.number }}
-          PR_REF: ${{ github.event.pull_request.head.sha }}
-        run: |
-          echo "${PR_NUMBER}" >> .artifacts/docs/html/pull_request_number.txt
-          echo "${PR_REF}" >> .artifacts/docs/html/pull_request_ref.txt
+          strict: ${{ fromJSON(inputs.strict != '' && inputs.strict || 'true') }}
       - uses: actions/upload-artifact@v4
         with:
           name: docs
           path: .artifacts/docs/html/
+          if-no-files-found: error
+          retention-days: 1
+          # The lower the compression-level, the faster the artifact will be uploaded.
+          # But the size of the artifact will be larger.
+          compression-level: 1

.github/workflows/preview-deploy.yml

@@ -17,16 +17,20 @@ jobs:
   docs-deploy:
     runs-on: ubuntu-latest
     steps:
-      - name: Download docs
+      - name: Download PR data
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
-          gh run download ${{ github.event.workflow_run.id }} --name docs --repo "${GITHUB_REPOSITORY}"
+          gh run download ${{ github.event.workflow_run.id }} \
+            --repo "${GITHUB_REPOSITORY}" \
+            --name pull-request-data
       - name: Get PR data
         id: pull_request
         run: |
-          echo "number=$(cat pull_request_number.txt)" >> "${GITHUB_OUTPUT}"
-          echo "ref=$(cat pull_request_ref.txt)" >> "${GITHUB_OUTPUT}"
+          {
+            echo "number=$(jq -r '.number' pull_request.json)"
+            echo "ref=$(jq -r '.ref' pull_request.json)"
+          } >> "${GITHUB_OUTPUT}"
 
       - name: Create Deployment
         uses: actions/github-script@v7
@@ -54,14 +58,22 @@ jobs:
                 log_url: `https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId}`,
             })
             return deployment.data.id
+            
+      - name: Download docs
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh run download ${{ github.event.workflow_run.id }} \
+            --repo "${GITHUB_REPOSITORY}" \
+            --name docs
 
       - uses: elastic/docs-builder/.github/actions/aws-auth@main
 
       - name: Upload to S3
         env:
           PR_NUMBER: ${{ steps.pull_request.outputs.number }}
         run: |
-          aws s3 sync . "s3://elastic-docs-v3-website-preview/${GITHUB_REPOSITORY}/pull/${PR_NUMBER}" --delete --exclude "pull_request_number.txt"
+          aws s3 sync . "s3://elastic-docs-v3-website-preview/${GITHUB_REPOSITORY}/pull/${PR_NUMBER}" --delete --exclude "pull_request.json"
           aws cloudfront create-invalidation --distribution-id EKT7LT5PM8RKS --paths "/${GITHUB_REPOSITORY}/pull/${PR_NUMBER}/*"
 
       - name: Update deployment status