[CI/Build] Add shell script linting using shellcheck (#7925)

Signed-off-by: Russell Bryant <rbryant@redhat.com>

.buildkite/run-amd-test.sh

@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # This script runs test inside the corresponding ROCm docker container.
 set -o pipefail
 
@@ -57,17 +59,17 @@ done
 echo "--- Pulling container" 
 image_name="rocm/vllm-ci:${BUILDKITE_COMMIT}"
 container_name="rocm_${BUILDKITE_COMMIT}_$(tr -dc A-Za-z0-9 < /dev/urandom | head -c 10; echo)"
-docker pull ${image_name}
+docker pull "${image_name}"
 
 remove_docker_container() {
-   docker rm -f ${container_name} || docker image rm -f ${image_name} || true
+   docker rm -f "${container_name}" || docker image rm -f "${image_name}" || true
 }
 trap remove_docker_container EXIT
 
 echo "--- Running container"
 
 HF_CACHE="$(realpath ~)/huggingface"
-mkdir -p ${HF_CACHE}
+mkdir -p "${HF_CACHE}"
 HF_MOUNT="/root/.cache/huggingface"
 
 commands=$@
@@ -118,25 +120,25 @@ if [[ $commands == *"--shard-id="* ]]; then
         --network host \
         --shm-size=16gb \
         --rm \
-        -e HIP_VISIBLE_DEVICES=${GPU} \
+        -e HIP_VISIBLE_DEVICES="${GPU}" \
         -e HF_TOKEN \
-        -v ${HF_CACHE}:${HF_MOUNT} \
-        -e HF_HOME=${HF_MOUNT} \
-        --name ${container_name}_${GPU}  \
-        ${image_name} \
+        -v "${HF_CACHE}:${HF_MOUNT}" \
+        -e "HF_HOME=${HF_MOUNT}" \
+        --name "${container_name}_${GPU}" \
+        "${image_name}" \
         /bin/bash -c "${commands_gpu}" \
         |& while read -r line; do echo ">>Shard $GPU: $line"; done &
     PIDS+=($!)
   done
   #wait for all processes to finish and collect exit codes
-  for pid in ${PIDS[@]}; do
-    wait ${pid}
+  for pid in "${PIDS[@]}"; do
+    wait "${pid}"
     STATUS+=($?)
   done
-  for st in ${STATUS[@]}; do
+  for st in "${STATUS[@]}"; do
     if [[ ${st} -ne 0 ]]; then
       echo "One of the processes failed with $st"
-      exit ${st}
+      exit "${st}"
     fi
   done
 else
@@ -147,9 +149,9 @@ else
           --rm \
           -e HIP_VISIBLE_DEVICES=0 \
           -e HF_TOKEN \
-          -v ${HF_CACHE}:${HF_MOUNT} \
-          -e HF_HOME=${HF_MOUNT} \
-          --name ${container_name} \
-          ${image_name} \
+          -v "${HF_CACHE}:${HF_MOUNT}" \
+          -e "HF_HOME=${HF_MOUNT}" \
+          --name "${container_name}" \
+          "${image_name}" \
           /bin/bash -c "${commands}"
 fi