add script to run integration bundling in parallel

Author: lobsterkatie

packages/integrations/package.json

@@ -26,7 +26,7 @@
   },
   "scripts": {
     "build": "run-p build:cjs build:esm build:bundle",
-    "build:bundle": "rollup --config",
+    "build:bundle": "bash scripts/buildBundles.sh",
     "build:cjs": "tsc -p tsconfig.cjs.json",
     "build:dev": "run-s build:cjs build:esm",
     "build:es5": "yarn build:cjs # *** backwards compatibility - remove in v7 ***",

packages/integrations/scripts/buildBundles.sh

@@ -0,0 +1,20 @@
+for filepath in ./src/*; do
+  file=$(basename $filepath)
+
+  # the index file is only there for the purposes of npm builds - for the CDN we create a separate bundle for each
+  # integration - so we can skip it here
+  if [[ $file == "index.ts" ]]; then
+    continue
+  fi
+
+  # run the build for each integration, pushing each build process into the background once it starts (that's what the
+  # trailing `&` does) so that we can start another one
+  echo -e "\nBuilding bundles for \`$file\`..."
+  INTEGRATION_FILE=$file yarn --silent rollup -c rollup.config.js 2>/dev/null && echo -e "\nFinished building bundles for \`$file\`." &
+
+done
+
+# keep the process running until all backgrounded tasks have finished
+wait
+
+echo "Integration bundles built successfully"