160 lines
4.3 KiB
Bash
160 lines
4.3 KiB
Bash
#!/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_ENABLED=true
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KUBE_PS1_COLOR_SYMBOL="%{$fg[blue]%}"
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KUBE_PS1_COLOR_CONTEXT="%{$fg[red]%}"
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KUBE_PS1_COLOR_NS="%{$fg[cyan]%}"
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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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# function to disable the prompt on the current shell
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kubeon(){
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KUBE_PS1_ENABLED=true
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}
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# function to disable the prompt on the current shell
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kubeoff(){
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KUBE_PS1_ENABLED=false
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}
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# Build our prompt
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kube_ps1 () {
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local reset_color="%{$reset_color%}"
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[[ ${KUBE_PS1_ENABLED} != 'true' ]] && return
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KUBE_PS1="${reset_color}$KUBE_PS1_PREFIX"
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KUBE_PS1+="${KUBE_PS1_COLOR_SYMBOL}$(_kube_ps1_symbol)"
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KUBE_PS1+="${reset_color}$KUBE_PS1_SEPERATOR"
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KUBE_PS1+="${KUBE_PS1_COLOR_CONTEXT}$KUBE_PS1_CONTEXT${reset_color}"
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KUBE_PS1+="$KUBE_PS1_DIVIDER"
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KUBE_PS1+="${KUBE_PS1_COLOR_NS}$KUBE_PS1_NAMESPACE${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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