ci(align-deps): generate and post summary comment

Author: tido64

.changeset/wet-bushes-fry.md

@@ -0,0 +1,2 @@
+---
+---

.github/workflows/align-deps.yml

@@ -10,7 +10,9 @@ env:
 jobs:
   update:
     name: "Update `microsoft/react-native` preset"
-    permissions: {}
+    permissions:
+      contents: read
+      copilot-requests: write
     if: ${{ github.repository == 'microsoft/rnx-kit' }}
     runs-on: ubuntu-24.04
     steps:
@@ -72,13 +74,32 @@ jobs:
           permission-contents: write
           permission-pull-requests: write
       - name: Create or update pull request
+        id: create-pull-request
         if: ${{ steps.find-release-candidate.outputs.found != '' }}
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@v8
         with:
           token: ${{ steps.app-token.outputs.token }}
           commit-message: "fix(align-deps): ${{ steps.changeset.outputs.message }}"
           branch: rnx-align-deps/main
           sign-commits: true
           title: "fix(align-deps): ${{ steps.changeset.outputs.message }}"
           body-path: packages/align-deps/update-profile.output.txt
-    timeout-minutes: 15
+      - name: Generate summary
+        id: summary
+        if: ${{ steps.create-pull-request.outputs.pull-request-number != '' }}
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          scripts/github-comment.sh summary
+        working-directory: packages/align-deps
+        continue-on-error: true
+      - name: Create or update summary comment
+        if: ${{ steps.create-pull-request.outputs.pull-request-number != '' }}
+        env:
+          GH_TOKEN: ${{ steps.app-token.outputs.token }}
+          PR_NUMBER: ${{ steps.create-pull-request.outputs.pull-request-number }}
+        run: |
+          scripts/github-comment.sh post
+        working-directory: packages/align-deps
+        continue-on-error: true
+    timeout-minutes: 20

packages/align-deps/scripts/github-comment.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+MARKER='<!-- rnx-align-deps-copilot-summary -->'
+OUTPUT='profile-comment.output.md'
+PROMPT="Scan for changes between current and latest available version of dependencies in the table below and give me a list of all changes that might be related to supporting new React Native versions.\n\n$(cat update-profile.output.txt)"
+REPO="repos/${GITHUB_REPOSITORY}/issues"
+
+case ${1-} in
+  summary)
+    echo "${MARKER}\n\n" > $OUTPUT
+    npx --yes @github/copilot --prompt "${PROMPT}" --silent --no-ask-user --allow-tool='shell(git:*)' >> $OUTPUT
+    ;;
+
+  post)
+    comment_id="$(
+      gh api --paginate "${REPO}/${PR_NUMBER}/comments" \
+        --jq ".[] | select(.body | startswith(\"${MARKER}\")) | .id" |
+        head -n 1
+      )"
+
+      if [[ -n "$comment_id" ]]; then
+        gh api --method PATCH "${REPO}/comments/${comment_id}" --field body=@$OUTPUT
+      else
+        gh api --method POST "${REPO}/${PR_NUMBER}/comments" --field body=@$OUTPUT
+      fi
+    ;;
+
+  *)
+    echo "usage: $0 [summary|post]"
+    ;;
+esac