From fecd0458b5cffd9109b882eddf0175765712b132 Mon Sep 17 00:00:00 2001
From: Matt Raible <matt.raible@crowdstrike.com>
Date: Tue, 10 Feb 2026 12:52:11 -0700
Subject: [PATCH] Skip unnecessary rebuilds when no dependencies changed

Add a check step to the rebuild workflow that compares the last commit
touching dependency files against the last dist build commit. If no
dependency files changed since the last rebuild, all subsequent steps
are skipped, avoiding unnecessary install and build cycles.
---
 .github/workflows/rebuild.yml | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/.github/workflows/rebuild.yml b/.github/workflows/rebuild.yml
index 840dafc..f5bd97c 100644
--- a/.github/workflows/rebuild.yml
+++ b/.github/workflows/rebuild.yml
@@ -21,17 +21,39 @@ jobs:
         uses: actions/setup-node@395ad3262231945c25e8478fd5baf05154b1d79f  # v6.1.0
         with:
           node-version: 22
+      - name: Check if rebuild needed
+        id: check
+        run: |
+          LAST_BUILD=$(git log -1 --format=%H -- ui/extensions/hello/src/dist/)
+          if [ -z "$LAST_BUILD" ]; then
+            echo "skip=false" >> "$GITHUB_OUTPUT"
+            echo "No previous build found, rebuilding"
+            exit 0
+          fi
+          CHANGES=$(git diff --name-only "$LAST_BUILD" HEAD -- ui/extensions/hello/package.json ui/extensions/hello/package-lock.json)
+          if [ -z "$CHANGES" ]; then
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+            echo "No dependency changes since last build, skipping"
+          else
+            echo "skip=false" >> "$GITHUB_OUTPUT"
+            echo "Dependency changes detected:"
+            echo "$CHANGES"
+          fi
       - name: Install dependencies
+        if: steps.check.outputs.skip != 'true'
         run: npm ci
         working-directory: ui/extensions/hello
       - name: Build React app
+        if: steps.check.outputs.skip != 'true'
         run: npm run build
         working-directory: ui/extensions/hello
       - name: Create commit
+        if: steps.check.outputs.skip != 'true'
         run: |
           git add .
           git commit -a -m "Rebuild UI with latest dependencies" || true
       - name: Create Pull Request
+        if: steps.check.outputs.skip != 'true'
         uses: peter-evans/create-pull-request@22a9089034f40e5a961c8808d113e2c98fb63676  # v7.0.11
         with:
           token: ${{ secrets.GITHUB_TOKEN }}