overleaf/services/web/bin/cdn_upload

#!/bin/bash
set -e

function upload_into_bucket() {
  bucket=$1

  # stylesheets
  bin/cdn_upload_batch 'text/css' "$bucket" '.css' \
    -x '.+(?<!\.css)$' &

  # javascript files
  bin/cdn_upload_batch 'application/javascript' "$bucket" '.js' \
    -x '.+(?<!\.js)$' &

  # the rest
  bin/cdn_upload_batch '-' "$bucket" '-' \
    -x '.+\.(css|js)$' &

  wait
}

# Upload to staging CDN if branch is either 'master' or 'staging-master' or main variants
if [[ "$BRANCH_NAME" == "master" || "$BRANCH_NAME" == "staging-master" || "$BRANCH_NAME" == "main" || "$BRANCH_NAME" == "staging-main" ]]; then
  tar --directory=/tmp/ -xf build.tar

  # delete source maps
  find /tmp/public -name '*.js.map' -delete

  bin/compress_assets

  upload_into_bucket $CDN_STAG
  # Only upload to production CDN if branch is
  if [[ "$BRANCH_NAME" == "master" || "$BRANCH_NAME" == "main" ]]; then
    upload_into_bucket $CDN_PROD
  fi
fi