mirror of
https://github.com/ohmyzsh/ohmyzsh.git
synced 2024-11-22 13:50:09 +00:00
371 lines
11 KiB
Bash
371 lines
11 KiB
Bash
#!/bin/bash
|
|
|
|
# Kubernetes prompt helper for bash/zsh
|
|
# Displays current context and namespace
|
|
|
|
# Copyright 2019 Jon Mosco
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
# Debug
|
|
[[ -n $DEBUG ]] && set -x
|
|
|
|
# Default values for the prompt
|
|
# Override these values in ~/.zshrc or ~/.bashrc
|
|
KUBE_PS1_BINARY="${KUBE_PS1_BINARY:-kubectl}"
|
|
KUBE_PS1_SYMBOL_ENABLE="${KUBE_PS1_SYMBOL_ENABLE:-true}"
|
|
KUBE_PS1_SYMBOL_DEFAULT=${KUBE_PS1_SYMBOL_DEFAULT:-$'\u2388 '}
|
|
KUBE_PS1_SYMBOL_USE_IMG="${KUBE_PS1_SYMBOL_USE_IMG:-false}"
|
|
KUBE_PS1_NS_ENABLE="${KUBE_PS1_NS_ENABLE:-true}"
|
|
KUBE_PS1_CONTEXT_ENABLE="${KUBE_PS1_CONTEXT_ENABLE:-true}"
|
|
KUBE_PS1_PREFIX="${KUBE_PS1_PREFIX-(}"
|
|
KUBE_PS1_SEPARATOR="${KUBE_PS1_SEPARATOR-|}"
|
|
KUBE_PS1_DIVIDER="${KUBE_PS1_DIVIDER-:}"
|
|
KUBE_PS1_SUFFIX="${KUBE_PS1_SUFFIX-)}"
|
|
KUBE_PS1_SYMBOL_COLOR="${KUBE_PS1_SYMBOL_COLOR-blue}"
|
|
KUBE_PS1_CTX_COLOR="${KUBE_PS1_CTX_COLOR-red}"
|
|
KUBE_PS1_NS_COLOR="${KUBE_PS1_NS_COLOR-cyan}"
|
|
KUBE_PS1_BG_COLOR="${KUBE_PS1_BG_COLOR}"
|
|
KUBE_PS1_KUBECONFIG_CACHE="${KUBECONFIG}"
|
|
KUBE_PS1_DISABLE_PATH="${HOME}/.kube/kube-ps1/disabled"
|
|
KUBE_PS1_LAST_TIME=0
|
|
KUBE_PS1_CLUSTER_FUNCTION="${KUBE_PS1_CLUSTER_FUNCTION}"
|
|
KUBE_PS1_NAMESPACE_FUNCTION="${KUBE_PS1_NAMESPACE_FUNCTION}"
|
|
|
|
# Determine our shell
|
|
if [ "${ZSH_VERSION-}" ]; then
|
|
KUBE_PS1_SHELL="zsh"
|
|
elif [ "${BASH_VERSION-}" ]; then
|
|
KUBE_PS1_SHELL="bash"
|
|
fi
|
|
|
|
_kube_ps1_init() {
|
|
[[ -f "${KUBE_PS1_DISABLE_PATH}" ]] && KUBE_PS1_ENABLED=off
|
|
|
|
case "${KUBE_PS1_SHELL}" in
|
|
"zsh")
|
|
_KUBE_PS1_OPEN_ESC="%{"
|
|
_KUBE_PS1_CLOSE_ESC="%}"
|
|
_KUBE_PS1_DEFAULT_BG="%k"
|
|
_KUBE_PS1_DEFAULT_FG="%f"
|
|
setopt PROMPT_SUBST
|
|
autoload -U add-zsh-hook
|
|
add-zsh-hook precmd _kube_ps1_update_cache
|
|
zmodload -F zsh/stat b:zstat
|
|
zmodload zsh/datetime
|
|
;;
|
|
"bash")
|
|
_KUBE_PS1_OPEN_ESC=$'\001'
|
|
_KUBE_PS1_CLOSE_ESC=$'\002'
|
|
_KUBE_PS1_DEFAULT_BG=$'\033[49m'
|
|
_KUBE_PS1_DEFAULT_FG=$'\033[39m'
|
|
[[ $PROMPT_COMMAND =~ _kube_ps1_update_cache ]] || PROMPT_COMMAND="_kube_ps1_update_cache;${PROMPT_COMMAND:-:}"
|
|
;;
|
|
esac
|
|
}
|
|
|
|
_kube_ps1_color_fg() {
|
|
local KUBE_PS1_FG_CODE
|
|
case "${1}" in
|
|
black) KUBE_PS1_FG_CODE=0;;
|
|
red) KUBE_PS1_FG_CODE=1;;
|
|
green) KUBE_PS1_FG_CODE=2;;
|
|
yellow) KUBE_PS1_FG_CODE=3;;
|
|
blue) KUBE_PS1_FG_CODE=4;;
|
|
magenta) KUBE_PS1_FG_CODE=5;;
|
|
cyan) KUBE_PS1_FG_CODE=6;;
|
|
white) KUBE_PS1_FG_CODE=7;;
|
|
# 256
|
|
[0-9]|[1-9][0-9]|[1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-6]) KUBE_PS1_FG_CODE="${1}";;
|
|
*) KUBE_PS1_FG_CODE=default
|
|
esac
|
|
|
|
if [[ "${KUBE_PS1_FG_CODE}" == "default" ]]; then
|
|
KUBE_PS1_FG_CODE="${_KUBE_PS1_DEFAULT_FG}"
|
|
return
|
|
elif [[ "${KUBE_PS1_SHELL}" == "zsh" ]]; then
|
|
KUBE_PS1_FG_CODE="%F{$KUBE_PS1_FG_CODE}"
|
|
elif [[ "${KUBE_PS1_SHELL}" == "bash" ]]; then
|
|
if tput setaf 1 &> /dev/null; then
|
|
KUBE_PS1_FG_CODE="$(tput setaf ${KUBE_PS1_FG_CODE})"
|
|
elif [[ $KUBE_PS1_FG_CODE -ge 0 ]] && [[ $KUBE_PS1_FG_CODE -le 256 ]]; then
|
|
KUBE_PS1_FG_CODE="\033[38;5;${KUBE_PS1_FG_CODE}m"
|
|
else
|
|
KUBE_PS1_FG_CODE="${_KUBE_PS1_DEFAULT_FG}"
|
|
fi
|
|
fi
|
|
echo ${_KUBE_PS1_OPEN_ESC}${KUBE_PS1_FG_CODE}${_KUBE_PS1_CLOSE_ESC}
|
|
}
|
|
|
|
_kube_ps1_color_bg() {
|
|
local KUBE_PS1_BG_CODE
|
|
case "${1}" in
|
|
black) KUBE_PS1_BG_CODE=0;;
|
|
red) KUBE_PS1_BG_CODE=1;;
|
|
green) KUBE_PS1_BG_CODE=2;;
|
|
yellow) KUBE_PS1_BG_CODE=3;;
|
|
blue) KUBE_PS1_BG_CODE=4;;
|
|
magenta) KUBE_PS1_BG_CODE=5;;
|
|
cyan) KUBE_PS1_BG_CODE=6;;
|
|
white) KUBE_PS1_BG_CODE=7;;
|
|
# 256
|
|
[0-9]|[1-9][0-9]|[1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-6]) KUBE_PS1_BG_CODE="${1}";;
|
|
*) KUBE_PS1_BG_CODE=$'\033[0m';;
|
|
esac
|
|
|
|
if [[ "${KUBE_PS1_BG_CODE}" == "default" ]]; then
|
|
KUBE_PS1_FG_CODE="${_KUBE_PS1_DEFAULT_BG}"
|
|
return
|
|
elif [[ "${KUBE_PS1_SHELL}" == "zsh" ]]; then
|
|
KUBE_PS1_BG_CODE="%K{$KUBE_PS1_BG_CODE}"
|
|
elif [[ "${KUBE_PS1_SHELL}" == "bash" ]]; then
|
|
if tput setaf 1 &> /dev/null; then
|
|
KUBE_PS1_BG_CODE="$(tput setab ${KUBE_PS1_BG_CODE})"
|
|
elif [[ $KUBE_PS1_BG_CODE -ge 0 ]] && [[ $KUBE_PS1_BG_CODE -le 256 ]]; then
|
|
KUBE_PS1_BG_CODE="\033[48;5;${KUBE_PS1_BG_CODE}m"
|
|
else
|
|
KUBE_PS1_BG_CODE="${DEFAULT_BG}"
|
|
fi
|
|
fi
|
|
echo ${OPEN_ESC}${KUBE_PS1_BG_CODE}${CLOSE_ESC}
|
|
}
|
|
|
|
_kube_ps1_binary_check() {
|
|
command -v $1 >/dev/null
|
|
}
|
|
|
|
_kube_ps1_symbol() {
|
|
[[ "${KUBE_PS1_SYMBOL_ENABLE}" == false ]] && return
|
|
|
|
case "${KUBE_PS1_SHELL}" in
|
|
bash)
|
|
if ((BASH_VERSINFO[0] >= 4)) && [[ $'\u2388 ' != "\\u2388 " ]]; then
|
|
KUBE_PS1_SYMBOL="${KUBE_PS1_SYMBOL_DEFAULT}"
|
|
# KUBE_PS1_SYMBOL=$'\u2388 '
|
|
KUBE_PS1_SYMBOL_IMG=$'\u2638 '
|
|
else
|
|
KUBE_PS1_SYMBOL=$'\xE2\x8E\x88 '
|
|
KUBE_PS1_SYMBOL_IMG=$'\xE2\x98\xB8 '
|
|
fi
|
|
;;
|
|
zsh)
|
|
KUBE_PS1_SYMBOL="${KUBE_PS1_SYMBOL_DEFAULT}"
|
|
KUBE_PS1_SYMBOL_IMG="\u2638 ";;
|
|
*)
|
|
KUBE_PS1_SYMBOL="k8s"
|
|
esac
|
|
|
|
if [[ "${KUBE_PS1_SYMBOL_USE_IMG}" == true ]]; then
|
|
KUBE_PS1_SYMBOL="${KUBE_PS1_SYMBOL_IMG}"
|
|
fi
|
|
|
|
echo "${KUBE_PS1_SYMBOL}"
|
|
}
|
|
|
|
_kube_ps1_split() {
|
|
type setopt >/dev/null 2>&1 && setopt SH_WORD_SPLIT
|
|
local IFS=$1
|
|
echo $2
|
|
}
|
|
|
|
_kube_ps1_file_newer_than() {
|
|
local mtime
|
|
local file=$1
|
|
local check_time=$2
|
|
|
|
if [[ "${KUBE_PS1_SHELL}" == "zsh" ]]; then
|
|
mtime=$(zstat +mtime "${file}")
|
|
elif stat -c "%s" /dev/null &> /dev/null; then
|
|
# GNU stat
|
|
mtime=$(stat -L -c %Y "${file}")
|
|
else
|
|
# BSD stat
|
|
mtime=$(stat -L -f %m "$file")
|
|
fi
|
|
|
|
[[ "${mtime}" -gt "${check_time}" ]]
|
|
}
|
|
|
|
_kube_ps1_update_cache() {
|
|
local return_code=$?
|
|
|
|
[[ "${KUBE_PS1_ENABLED}" == "off" ]] && return $return_code
|
|
|
|
if ! _kube_ps1_binary_check "${KUBE_PS1_BINARY}"; then
|
|
# No ability to fetch context/namespace; display N/A.
|
|
KUBE_PS1_CONTEXT="BINARY-N/A"
|
|
KUBE_PS1_NAMESPACE="N/A"
|
|
return
|
|
fi
|
|
|
|
if [[ "${KUBECONFIG}" != "${KUBE_PS1_KUBECONFIG_CACHE}" ]]; then
|
|
# User changed KUBECONFIG; unconditionally refetch.
|
|
KUBE_PS1_KUBECONFIG_CACHE=${KUBECONFIG}
|
|
_kube_ps1_get_context_ns
|
|
return
|
|
fi
|
|
|
|
# kubectl will read the environment variable $KUBECONFIG
|
|
# otherwise set it to ~/.kube/config
|
|
local conf
|
|
for conf in $(_kube_ps1_split : "${KUBECONFIG:-${HOME}/.kube/config}"); do
|
|
[[ -r "${conf}" ]] || continue
|
|
if _kube_ps1_file_newer_than "${conf}" "${KUBE_PS1_LAST_TIME}"; then
|
|
_kube_ps1_get_context_ns
|
|
return
|
|
fi
|
|
done
|
|
|
|
return $return_code
|
|
}
|
|
|
|
_kube_ps1_get_context() {
|
|
if [[ "${KUBE_PS1_CONTEXT_ENABLE}" == true ]]; then
|
|
KUBE_PS1_CONTEXT="$(${KUBE_PS1_BINARY} config current-context 2>/dev/null)"
|
|
# Set namespace to 'N/A' if it is not defined
|
|
KUBE_PS1_CONTEXT="${KUBE_PS1_CONTEXT:-N/A}"
|
|
|
|
if [[ ! -z "${KUBE_PS1_CLUSTER_FUNCTION}" ]]; then
|
|
KUBE_PS1_CONTEXT=$($KUBE_PS1_CLUSTER_FUNCTION $KUBE_PS1_CONTEXT)
|
|
fi
|
|
fi
|
|
}
|
|
|
|
_kube_ps1_get_ns() {
|
|
if [[ "${KUBE_PS1_NS_ENABLE}" == true ]]; then
|
|
KUBE_PS1_NAMESPACE="$(${KUBE_PS1_BINARY} config view --minify --output 'jsonpath={..namespace}' 2>/dev/null)"
|
|
# Set namespace to 'default' if it is not defined
|
|
KUBE_PS1_NAMESPACE="${KUBE_PS1_NAMESPACE:-default}"
|
|
|
|
if [[ ! -z "${KUBE_PS1_NAMESPACE_FUNCTION}" ]]; then
|
|
KUBE_PS1_NAMESPACE=$($KUBE_PS1_NAMESPACE_FUNCTION $KUBE_PS1_NAMESPACE)
|
|
fi
|
|
fi
|
|
}
|
|
|
|
_kube_ps1_get_context_ns() {
|
|
# Set the command time
|
|
if [[ "${KUBE_PS1_SHELL}" == "bash" ]]; then
|
|
if ((BASH_VERSINFO[0] >= 4 && BASH_VERSINFO[1] >= 2)); then
|
|
KUBE_PS1_LAST_TIME=$(printf '%(%s)T')
|
|
else
|
|
KUBE_PS1_LAST_TIME=$(date +%s)
|
|
fi
|
|
elif [[ "${KUBE_PS1_SHELL}" == "zsh" ]]; then
|
|
KUBE_PS1_LAST_TIME=$EPOCHSECONDS
|
|
fi
|
|
|
|
_kube_ps1_get_context
|
|
_kube_ps1_get_ns
|
|
}
|
|
|
|
# Set kube-ps1 shell defaults
|
|
_kube_ps1_init
|
|
|
|
_kubeon_usage() {
|
|
cat <<"EOF"
|
|
Toggle kube-ps1 prompt on
|
|
|
|
Usage: kubeon [-g | --global] [-h | --help]
|
|
|
|
With no arguments, turn off kube-ps1 status for this shell instance (default).
|
|
|
|
-g --global turn on kube-ps1 status globally
|
|
-h --help print this message
|
|
EOF
|
|
}
|
|
|
|
_kubeoff_usage() {
|
|
cat <<"EOF"
|
|
Toggle kube-ps1 prompt off
|
|
|
|
Usage: kubeoff [-g | --global] [-h | --help]
|
|
|
|
With no arguments, turn off kube-ps1 status for this shell instance (default).
|
|
|
|
-g --global turn off kube-ps1 status globally
|
|
-h --help print this message
|
|
EOF
|
|
}
|
|
|
|
kubeon() {
|
|
if [[ "${1}" == '-h' || "${1}" == '--help' ]]; then
|
|
_kubeon_usage
|
|
elif [[ "${1}" == '-g' || "${1}" == '--global' ]]; then
|
|
rm -f -- "${KUBE_PS1_DISABLE_PATH}"
|
|
elif [[ "$#" -ne 0 ]]; then
|
|
echo -e "error: unrecognized flag ${1}\\n"
|
|
_kubeon_usage
|
|
return
|
|
fi
|
|
|
|
KUBE_PS1_ENABLED=on
|
|
}
|
|
|
|
kubeoff() {
|
|
if [[ "${1}" == '-h' || "${1}" == '--help' ]]; then
|
|
_kubeoff_usage
|
|
elif [[ "${1}" == '-g' || "${1}" == '--global' ]]; then
|
|
mkdir -p -- "$(dirname "${KUBE_PS1_DISABLE_PATH}")"
|
|
touch -- "${KUBE_PS1_DISABLE_PATH}"
|
|
elif [[ $# -ne 0 ]]; then
|
|
echo "error: unrecognized flag ${1}" >&2
|
|
_kubeoff_usage
|
|
return
|
|
fi
|
|
|
|
KUBE_PS1_ENABLED=off
|
|
}
|
|
|
|
# Build our prompt
|
|
kube_ps1() {
|
|
[[ "${KUBE_PS1_ENABLED}" == "off" ]] && return
|
|
[[ -z "${KUBE_PS1_CONTEXT}" ]] && [[ "${KUBE_PS1_CONTEXT_ENABLE}" == true ]] && return
|
|
|
|
local KUBE_PS1
|
|
local KUBE_PS1_RESET_COLOR="${_KUBE_PS1_OPEN_ESC}${_KUBE_PS1_DEFAULT_FG}${_KUBE_PS1_CLOSE_ESC}"
|
|
|
|
# Background Color
|
|
[[ -n "${KUBE_PS1_BG_COLOR}" ]] && KUBE_PS1+="$(_kube_ps1_color_bg ${KUBE_PS1_BG_COLOR})"
|
|
|
|
# Prefix
|
|
[[ -n "${KUBE_PS1_PREFIX}" ]] && KUBE_PS1+="${KUBE_PS1_PREFIX}"
|
|
|
|
# Symbol
|
|
KUBE_PS1+="$(_kube_ps1_color_fg $KUBE_PS1_SYMBOL_COLOR)$(_kube_ps1_symbol)${KUBE_PS1_RESET_COLOR}"
|
|
|
|
if [[ -n "${KUBE_PS1_SEPARATOR}" ]] && [[ "${KUBE_PS1_SYMBOL_ENABLE}" == true ]]; then
|
|
KUBE_PS1+="${KUBE_PS1_SEPARATOR}"
|
|
fi
|
|
|
|
# Context
|
|
if [[ "${KUBE_PS1_CONTEXT_ENABLE}" == true ]]; then
|
|
KUBE_PS1+="$(_kube_ps1_color_fg $KUBE_PS1_CTX_COLOR)${KUBE_PS1_CONTEXT}${KUBE_PS1_RESET_COLOR}"
|
|
fi
|
|
|
|
# Namespace
|
|
if [[ "${KUBE_PS1_NS_ENABLE}" == true ]]; then
|
|
if [[ -n "${KUBE_PS1_DIVIDER}" ]] && [[ "${KUBE_PS1_CONTEXT_ENABLE}" == true ]]; then
|
|
KUBE_PS1+="${KUBE_PS1_DIVIDER}"
|
|
fi
|
|
KUBE_PS1+="$(_kube_ps1_color_fg ${KUBE_PS1_NS_COLOR})${KUBE_PS1_NAMESPACE}${KUBE_PS1_RESET_COLOR}"
|
|
fi
|
|
|
|
# Suffix
|
|
[[ -n "${KUBE_PS1_SUFFIX}" ]] && KUBE_PS1+="${KUBE_PS1_SUFFIX}"
|
|
|
|
# Close Background color if defined
|
|
[[ -n "${KUBE_PS1_BG_COLOR}" ]] && KUBE_PS1+="${_KUBE_PS1_OPEN_ESC}${_KUBE_PS1_DEFAULT_BG}${_KUBE_PS1_CLOSE_ESC}"
|
|
|
|
echo "${KUBE_PS1}"
|
|
}
|