rsync_helper.sh

# We need to determine the pod, namespace and context from the args
# For backward compatibility, we use + as the separator between namespace and context and add handling when context is not provided
if [ "$1" = "-l" ]; then
    # -l pod namespace+context ...
    # used by normal rsync
    shift
    pod=$1
    shift
    encoded_namespace_context=$1
    shift
    echo "pod: $pod" >&2
    # Revert the encoded namespace+context to the original string.
    namespace_context=$(echo "$encoded_namespace_context" | sed 's|%40|@|g' | sed 's|%3A|:|g' | sed 's|%2B|+|g' | sed 's|%2F|/|g')
    echo "namespace_context: $namespace_context" >&2
else
    # pod@namespace+context ...
    # used by openrsync
    encoded_pod_namespace_context=$1
    shift
    pod_namespace_context=$(echo "$encoded_pod_namespace_context" | sed 's|%40|@|g' | sed 's|%3A|:|g' | sed 's|%2B|+|g' | sed 's|%2F|/|g')
    echo "pod_namespace_context: $pod_namespace_context" >&2
    pod=$(echo $pod_namespace_context | cut -d@ -f1)
    echo "pod: $pod" >&2
    namespace_context=$(echo $pod_namespace_context | cut -d@ -f2-)
    echo "namespace_context: $namespace_context" >&2
fi
namespace=$(echo $namespace_context | cut -d+ -f1)
echo "namespace: $namespace" >&2
context=$(echo $namespace_context | grep '+' >/dev/null && echo $namespace_context | cut -d+ -f2- || echo "")
echo "context: $context" >&2
context_lower=$(echo "$context" | tr '[:upper:]' '[:lower:]')

if [ -z "$context" ] || [ "$context_lower" = "none" ]; then
    # If context is none, it means we are using incluster auth. In this case,
    # use need to set KUBECONFIG to /dev/null to avoid using kubeconfig file.
    kubectl exec -i $pod -n $namespace --kubeconfig=/dev/null -- "$@"
else
    kubectl exec -i $pod -n $namespace --context=$context -- "$@"
fi