diff --git a/llvm-apt.sh b/llvm-apt.sh
new file mode 100755
index 0000000..a4586fe
--- /dev/null
+++ b/llvm-apt.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+set -e
+set -o pipefail
+
+_here=`dirname $(realpath $0)`
+apt_sync="${_here}/apt-sync.py"
+
+BASE_PATH="${TUNASYNC_WORKING_DIR}"
+BASE_URL=${TUNASYNC_UPSTREAM_URL:-"https://apt.llvm.org"}
+
+export REPO_SIZE_FILE=/tmp/reposize.$RANDOM
+
+for os in "xenial" "bionic" "focal" "stretch" "buster"; do
+    for ver in "" "-9" "-10"; do
+        "$apt_sync" --delete "$BASE_URL/$os" llvm-toolchain-$os$ver main amd64 "$BASE_PATH/$os"
+    done
+done
+
+echo "APT finished"
+
+"${_here}/helpers/size-sum.sh" $REPO_SIZE_FILE --rm