[HelpDot] verify that redirects.csv does not contain any duplicate keys

.github/scripts/verifyRedirect.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# HelpDot - Verifies that redirects.csv does not have any duplicates
+# Duplicate sourceURLs break redirection on cloudflare pages
+
+declare -r REDIRECTS_FILE="docs/redirects.csv"
+
+duplicates=$(awk -F, 'a[$1]++{print $1}' $REDIRECTS_FILE)
+
+if [[ -z "$duplicates" ]]; then
+    exit 0
+fi
+
+echo "duplicate redirects are not allowed: $duplicates"
+exit 1

.github/workflows/deployExpensifyHelp.yml

@@ -36,6 +36,9 @@ jobs:
 
       - name: Create docs routes file
         run: ./.github/scripts/createDocsRoutes.sh
+
+      - name: Check duplicates in redirect.csv
+        run: ./.github/scripts/verifyRedirect.sh
 
       - name: Build with Jekyll
         uses: actions/jekyll-build-pages@0143c158f4fa0c5dcd99499a5d00859d79f70b0e