[NRL-793] Fixed up shellcheck reports in new pull-lambda-code-for-sta…

…ck.sh

scripts/pull-lambda-code-for-stack.sh

@@ -2,29 +2,38 @@
 # Pull down all the lambda code for the named stack
 set -o errexit -o nounset -o pipefail
 
-: ${DIST_DIR:="./dist"}
+: "${DIST_DIR:="./dist"}"
+
+if [ $# -ne 1 ]
+then
+    echo "Error: stack-name argument is missing" 1>&2
+    echo "Usage: $0 <stack-name>" 1>&2
+    exit 1
+fi
 
 stack_name="$1"
 
 function pull_lambda_code(){
     local api_name="$1"
     local endpoint_name="$2"
-    local lambda_name="nhsd-nrlf--${stack_name}--api--${api_name}--${endpoint_name}"
+
+    lambda_name="nhsd-nrlf--${stack_name}--api--${api_name}--${endpoint_name}"
 
     echo -n "- Downloading code for lambda ${lambda_name}.... "
-    code_url="$(aws lambda get-function  --function-name ${lambda_name} | jq -r .Code.Location)"
+    code_url="$(aws lambda get-function  --function-name "${lambda_name}" | jq -r .Code.Location)"
     curl "${code_url}" 2>/dev/null > "${DIST_DIR}/${api_name}-${endpoint_name}.zip"
     echo "✅"
 }
 
 function pull_layer_code(){
     local name="$1"
-    local layer_name="nhsd-nrlf--${stack_name}--${name}"
-    local layer_version="$(aws lambda list-layer-versions --layer-name ${layer_name} | jq -r '.LayerVersions[0].Version')"
-    local layer_pkg_name="$(echo ${name} | tr '-' '_').zip"
 
-    echo -n "- Downloading code for layer ${layer_name} version ${layer_version}...."
-    code_url="$(aws lambda get-layer-version --layer-name ${layer_name} --version-number ${layer_version} | jq -r .Content.Location)"
+    layer_name="nhsd-nrlf--${stack_name}--${name}"
+    layer_pkg_name="$(echo "${name}" | tr '-' '_').zip"
+    layer_version="$(aws lambda list-layer-versions --layer-name "${layer_name}" | jq -r '.LayerVersions[0].Version')"
+
+    echo -n "- Downloading code for layer ${layer_name} version ${layer_version}.... "
+    code_url="$(aws lambda get-layer-version --layer-name "${layer_name}" --version-number "${layer_version}" | jq -r .Content.Location)"
     curl "${code_url}" 2>/dev/null > "${DIST_DIR}/${layer_pkg_name}"
     echo "✅"
 }
@@ -33,23 +42,27 @@ mkdir -p "${DIST_DIR}"
 
 echo
 echo "Pulling code for consumer API lambdas...."
-for endpoint_name in $(ls api/consumer)
+for endpoint_path in api/consumer/*
 do
-    if [ ! -d "api/consumer/${endpoint_name}" ]; then
+    if [ ! -d "${endpoint_path}" ]
+    then
         continue
     fi
 
+    endpoint_name="$(basename "${endpoint_path}")"
     pull_lambda_code "consumer" "${endpoint_name}"
 done
 
 echo
 echo "Pulling code for producer API lambdas...."
-for endpoint_name in $(ls api/producer)
+for endpoint_path in api/producer/*
 do
-    if [ ! -d "api/producer/${endpoint_name}" ]; then
+    if [ ! -d "${endpoint_path}" ]
+    then
         continue
     fi
 
+    endpoint_name="$(basename "${endpoint_path}")"
     pull_lambda_code "producer" "${endpoint_name}"
 done