test: preview command

.github/workflows/create-preview-link.yml

@@ -0,0 +1,144 @@
+name: Build Preview on Command
+permissions:
+  contents: read
+  pull-requests: write
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  build-preview:
+    runs-on: ubuntu-latest
+    # Only run on PR comments with the right command from maintainers
+    if: |
+      github.event.issue.pull_request &&
+      contains(github.event.comment.body, '/build-preview') &&
+      github.event.comment.author_association == 'OWNER' || 
+      github.event.comment.author_association == 'MEMBER' ||
+      github.event.comment.author_association == 'COLLABORATOR'
+
+    steps:
+      - name: Get PR details
+        id: pr
+        uses: actions/github-script@v7
+        with:
+          result-encoding: string
+          script: |
+            const pr = await github.rest.pulls.get({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: context.issue.number
+            });
+            return JSON.stringify({
+              head_sha: pr.data.head.sha,
+              head_ref: pr.data.head.ref,
+              head_repo: pr.data.head.repo.clone_url
+            });
+
+      - name: Setup Checkout for Bitcoin Transcripts
+        uses: actions/checkout@v4
+        with:
+          repository: ${{ fromJson(steps.pr.outputs.result).head_repo }}
+          ref: ${{ fromJson(steps.pr.outputs.result).head_sha }}
+          path: transcripts
+
+      - name: Setup Node.js 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Clone Registry Repo
+        run: git clone https://github.com/bitcointranscripts/registry.git
+
+      - name: Replace the public/bitcoin-transcript submodule in Registry with contents of this current branch
+        working-directory: transcripts
+        run: |
+          rm -rf ../registry/public/bitcoin-transcript
+          mkdir -p ../registry/public/bitcoin-transcript
+          cp -r * ../registry/public/bitcoin-transcript/
+
+      - name: Install dependencies
+        working-directory: registry
+        run: |
+          npm install
+
+      - name: Run Next.js build only
+        working-directory: registry
+        env:
+            API_KEY: ${{ secrets.API_KEY }}
+            CLOUD_ID: ${{ secrets.CLOUD_ID }}
+            INDEX: ${{ secrets.INDEX }}
+
+        run: |
+          npm run fetch-topics
+          npm run fetch-reviewers
+          npx next build
+
+      - name: Install Vercel CLI
+        run: npm install -g vercel
+
+      - name: Add vercel.json with custom build-only command
+        working-directory: registry
+        run: |
+          cat <<EOF > vercel.json
+          {
+            "buildCommand": "npm run fetch-topics && npm run fetch-reviewers && npx next build"
+          }
+          EOF
+
+      - name: Pull Vercel project settings
+        working-directory: registry
+        env:
+          VERCEL_TOKEN: ${{ secrets.VERCEL_TOKEN }}
+        run: vercel pull --yes --token=$VERCEL_TOKEN
+
+      - name: Build with Vercel CLI
+        working-directory: registry
+        env:
+          GITHUB_ACCESS_TOKEN: ${{ secrets.GH_ACCESS_TOKEN }}
+          VERCEL_TOKEN: ${{ secrets.VERCEL_TOKEN }}
+          API_KEY: ${{ secrets.API_KEY }}
+          CLOUD_ID: ${{ secrets.CLOUD_ID }}
+          INDEX: ${{ secrets.INDEX }}
+        run: vercel build --token=$VERCEL_TOKEN
+
+      - name: Deploy to Vercel  
+        working-directory: registry
+        env:
+          VERCEL_TOKEN: ${{ secrets.VERCEL_TOKEN }}
+        run: |
+          vercel deploy --prebuilt --token=$VERCEL_TOKEN  --archive=tgz --yes > ../vercel-preview-url.txt       
+
+      - name: Store Top-Level Folders
+        working-directory: transcripts
+        run: |
+            git remote add upstream https://github.com/bitcointranscripts/bitcointranscripts.git
+            git fetch upstream
+            top_level_folders=$(git diff --name-only upstream/master)
+            echo $top_level_folders > ../top_level_folders.txt
+
+      - name: Comment PR with Preview URL
+        uses: actions/github-script@v7
+        with:
+          script: |
+              const fs = require('fs');
+              const url = fs.readFileSync('vercel-preview-url.txt', 'utf8').trim();
+              const top_level_folders = fs.readFileSync('top_level_folders.txt', 'utf8').trim();
+              const dirs = top_level_folders.split(' ');
+              let commentBody = `Your Transcript Preview is ready:\n`;
+              if (dirs.length >= 1) {
+                for (const dir of dirs) {
+                  if(dir.includes(".md")) {
+                    let dir_name = dir.replace(".md", "");
+                    commentBody += `- [${dir_name}](${url}/${dir_name})\n`;
+                  }
+                }
+                  commentBody += `- [View All Transcript Sources](${url}/sources)\n`;
+              }
+
+              github.rest.issues.createComment({          
+                issue_number: context.issue.number,
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                body: commentBody
+              });