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Fixes #83 for kubens bash when no permission to list namespaces #451

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Fixes #83 for kubens bash when no permission to list namespaces #451

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41 changes: 29 additions & 12 deletions kubens
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,12 @@ exit_err() {
exit 1
}

am_i_logged_in() {
if ! $KUBECTL auth whoami >/dev/null 2>&1 ; then
exit_err "You are not logged in to this context. Log in first. Aborting..."
fi
}

current_namespace() {
local cur_ctx

Expand Down Expand Up @@ -100,8 +106,20 @@ save_namespace() {

switch_namespace() {
local ctx="${1}"
$KUBECTL config set-context "${ctx}" --namespace="${2}"
echo "Active namespace is \"${2}\".">&2
local ns="${2}"
local ret=0
local verb="get"
local resource="pods"
local perm="${verb} ${resource}"
if $KUBECTL -n ${ns} auth can-i ${verb} ${resource} >/dev/null 2>&1
then
$KUBECTL config set-context "${ctx}" --namespace="${ns}"
echo "Active namespace is \"${ns}\".">&2
else
echo "Not changing active namespace to \"${ns}\", as permission to \"${perm}\" is missing."
ret=1
fi
return ${ret}
}

choose_namespace_interactive() {
Expand Down Expand Up @@ -130,15 +148,8 @@ set_namespace() {
ctx="$(current_context)" || exit_err "error getting current context"
prev="$(current_namespace)" || exit_error "error getting current namespace"

if grep -q ^"${1}"\$ <(get_namespaces); then
switch_namespace "${ctx}" "${1}"

if [[ "${prev}" != "${1}" ]]; then
save_namespace "${ctx}" "${prev}"
fi
else
echo "error: no namespace exists with name \"${1}\".">&2
exit 1
if ! switch_namespace "${ctx}" "${1}"; then
echo "Failed to swich namespace to ${1}"
fi
}

Expand Down Expand Up @@ -188,12 +199,18 @@ main() {
KUBECTL=kubectl
elif hash kubectl.exe 2>/dev/null; then
KUBECTL=kubectl.exe
elif hash oc 2>/dev/null; then
KUBECTL=oc
elif hash oc.exe 2>/dev/null; then
KUBECTL=oc.exe
else
echo >&2 "kubectl is not installed"
echo >&2 "Neither kubectl nor oc is installed. Aborting..."
exit 1
fi
fi

am_i_logged_in

if [[ "$#" -eq 0 ]]; then
if [[ -t 1 && -z ${KUBECTX_IGNORE_FZF:-} && "$(type fzf &>/dev/null; echo $?)" -eq 0 ]]; then
choose_namespace_interactive
Expand Down