Merge pull request #1 from SamLR/master

Add usage & guards

Author: mveritym

bin/kubedecode

@@ -1,10 +1,33 @@
 #!/bin/bash
 
+function usage(){
+  echo -e "usage:      ${0} SECRET [NAMESPACE]\n"
+  echo -e "SECRET      The secret to decode"
+  echo -e "NAMESPACE   The namespace to retrieve the secret from (optional,"
+  echo -e "            defaults to the namespace of the current context)."
+}
+
+if [ "${1}" == "-h" ]; then
+  usage
+  exit
+fi
+
+if [[ -z "${1// }" ]]; then
+  echo "ERROR: No secret set."
+  usage
+  exit 1
+fi
 SECRET="$1"
-NAMESPACE="$2"
 
-for row in $(echo $(kubectl get secret $SECRET -o json -n $NAMESPACE) | jq -c '.data | to_entries[]'); do
-  KEY=$(echo $row | jq -r '.key')
-  DECODED=$(echo $row | jq -r '.value' | base64 --decode)
-  echo $KEY: $DECODED
+if [[ -z "${2// }" ]]; then
+  NAMESPACE=$(kubectl config get-contexts --no-headers | tr -s ' ' | cut -d ' ' -f5)
+  echo "No namespace set, using default: ${NAMESPACE}"
+else
+  NAMESPACE="$2"
+fi
+
+for row in $(kubectl get secret "${SECRET}" -o json -n "${NAMESPACE}" | jq -c '.data | to_entries[]'); do
+  KEY=$(echo "${row}" | jq -r '.key')
+  DECODED=$(echo "${row}" | jq -r '.value' | base64 --decode)
+  echo "${KEY}: ${DECODED}"
 done