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147 lines
4.0 KiB
147 lines
4.0 KiB
#!/bin/zsh |
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# Kubernetes prompt helper for bash/zsh |
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# ported to oh-my-zsh |
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# Displays current context and namespace |
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# Copyright 2018 Jon Mosco |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# https://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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# Debug |
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[[ -n $DEBUG ]] && set -x |
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setopt PROMPT_SUBST |
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autoload -U add-zsh-hook |
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add-zsh-hook precmd _kube_ps1_update_cache |
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zmodload zsh/stat |
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zmodload zsh/datetime |
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# Default values for the prompt |
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# Override these values in ~/.zshrc |
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KUBE_PS1_BINARY="${KUBE_PS1_BINARY:-kubectl}" |
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KUBE_PS1_SYMBOL_ENABLE="${KUBE_PS1_SYMBOL_ENABLE:-true}" |
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KUBE_PS1_SYMBOL_DEFAULT="${KUBE_PS1_SYMBOL_DEFAULT:-\u2388 }" |
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KUBE_PS1_SYMBOL_USE_IMG="${KUBE_PS1_SYMBOL_USE_IMG:-false}" |
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KUBE_PS1_NS_ENABLE="${KUBE_PS1_NS_ENABLE:-true}" |
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KUBE_PS1_SEPARATOR="${KUBE_PS1_SEPARATOR-|}" |
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KUBE_PS1_DIVIDER="${KUBE_PS1_DIVIDER-:}" |
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KUBE_PS1_PREFIX="${KUBE_PS1_PREFIX-(}" |
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KUBE_PS1_SUFFIX="${KUBE_PS1_SUFFIX-)}" |
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KUBE_PS1_LAST_TIME=0 |
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_kube_ps1_binary_check() { |
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command -v "$1" >/dev/null |
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} |
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_kube_ps1_symbol() { |
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[[ "${KUBE_PS1_SYMBOL_ENABLE}" == false ]] && return |
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KUBE_PS1_SYMBOL="${KUBE_PS1_SYMBOL_DEFAULT}" |
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KUBE_PS1_SYMBOL_IMG="\u2638 " |
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if [[ "${KUBE_PS1_SYMBOL_USE_IMG}" == true ]]; then |
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KUBE_PS1_SYMBOL="${KUBE_PS1_SYMBOL_IMG}" |
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fi |
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echo "${KUBE_PS1_SYMBOL}" |
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} |
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_kube_ps1_split() { |
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type setopt >/dev/null 2>&1 && setopt SH_WORD_SPLIT |
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local IFS=$1 |
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echo $2 |
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} |
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_kube_ps1_file_newer_than() { |
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local mtime |
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local file=$1 |
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local check_time=$2 |
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zmodload -e "zsh/stat" |
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if [[ "$?" -eq 0 ]]; then |
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mtime=$(stat +mtime "${file}") |
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elif stat -c "%s" /dev/null &> /dev/null; then |
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# GNU stat |
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mtime=$(stat -c %Y "${file}") |
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else |
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# BSD stat |
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mtime=$(stat -f %m "$file") |
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fi |
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[[ "${mtime}" -gt "${check_time}" ]] |
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} |
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_kube_ps1_update_cache() { |
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KUBECONFIG="${KUBECONFIG:=$HOME/.kube/config}" |
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if ! _kube_ps1_binary_check "${KUBE_PS1_BINARY}"; then |
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# No ability to fetch context/namespace; display N/A. |
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KUBE_PS1_CONTEXT="BINARY-N/A" |
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KUBE_PS1_NAMESPACE="N/A" |
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return |
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fi |
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if [[ "${KUBECONFIG}" != "${KUBE_PS1_KUBECONFIG_CACHE}" ]]; then |
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# User changed KUBECONFIG; unconditionally refetch. |
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KUBE_PS1_KUBECONFIG_CACHE=${KUBECONFIG} |
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_kube_ps1_get_context_ns |
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return |
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fi |
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# kubectl will read the environment variable $KUBECONFIG |
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# otherwise set it to ~/.kube/config |
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local conf |
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for conf in $(_kube_ps1_split : "${KUBECONFIG:-${HOME}/.kube/config}"); do |
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[[ -r "${conf}" ]] || continue |
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if _kube_ps1_file_newer_than "${conf}" "${KUBE_PS1_LAST_TIME}"; then |
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_kube_ps1_get_context_ns |
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return |
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fi |
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done |
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} |
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_kube_ps1_get_context_ns() { |
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# Set the command time |
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KUBE_PS1_LAST_TIME=$EPOCHSECONDS |
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KUBE_PS1_CONTEXT="$(${KUBE_PS1_BINARY} config current-context 2>/dev/null)" |
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if [[ -z "${KUBE_PS1_CONTEXT}" ]]; then |
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KUBE_PS1_CONTEXT="N/A" |
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KUBE_PS1_NAMESPACE="N/A" |
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return |
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elif [[ "${KUBE_PS1_NS_ENABLE}" == true ]]; then |
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KUBE_PS1_NAMESPACE="$(${KUBE_PS1_BINARY} config view --minify --output 'jsonpath={..namespace}' 2>/dev/null)" |
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# Set namespace to 'default' if it is not defined |
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KUBE_PS1_NAMESPACE="${KUBE_PS1_NAMESPACE:-default}" |
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fi |
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} |
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# Build our prompt |
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kube_ps1 () { |
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local reset_color="%f" |
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local blue="%F{blue}" |
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local red="%F{red}" |
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local cyan="%F{cyan}" |
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KUBE_PS1="${reset_color}$KUBE_PS1_PREFIX" |
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KUBE_PS1+="${blue}$(_kube_ps1_symbol)" |
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KUBE_PS1+="${reset_color}$KUBE_PS1_SEPERATOR" |
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KUBE_PS1+="${red}$KUBE_PS1_CONTEXT${reset_color}" |
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KUBE_PS1+="$KUBE_PS1_DIVIDER" |
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KUBE_PS1+="${cyan}$KUBE_PS1_NAMESPACE${reset_color}" |
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KUBE_PS1+="$KUBE_PS1_SUFFIX" |
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echo "${KUBE_PS1}" |
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}
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