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123 lines
3.2 KiB
Bash
123 lines
3.2 KiB
Bash
#!/bin/zsh
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# Kubernetes prompt helper for bash/zsh
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# Displays current context and namespace
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# Copyright 2017 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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# http://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 $DEBUG ]] && set -x
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setopt PROMPT_SUBST
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add-zsh-hook precmd _kube_ps1_load
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zmodload zsh/stat
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# Default values for the prompt
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# Override these values in ~/.zshrc or ~/.bashrc
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KUBE_PS1_DEFAULT="${KUBE_PS1_DEFAULT:=true}"
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KUBE_PS1_PREFIX="("
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KUBE_PS1_DEFAULT_LABEL="${KUBE_PS1_DEFAULT_LABEL:="⎈ "}"
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KUBE_PS1_DEFAULT_LABEL_IMG="${KUBE_PS1_DEFAULT_LABEL_IMG:=false}"
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KUBE_PS1_SEPERATOR="|"
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KUBE_PS1_PLATFORM="${KUBE_PS1_PLATFORM:="kubectl"}"
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KUBE_PS1_DIVIDER=":"
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KUBE_PS1_SUFFIX=")"
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KUBE_PS1_UNAME=$(uname)
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KUBE_PS1_LAST_TIME=0
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kube_ps1_label () {
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[[ "${KUBE_PS1_DEFAULT_LABEL_IMG}" == false ]] && return
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if [[ "${KUBE_PS1_DEFAULT_LABEL_IMG}" == true ]]; then
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local KUBE_LABEL="☸️ "
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fi
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KUBE_PS1_DEFAULT_LABEL="${KUBE_LABEL}"
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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=$2
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mtime=$(stat +mtime "${file}")
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[ "${mtime}" -gt "${check_time}" ]
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}
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_kube_ps1_load() {
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# kubectl will read the environment variable $KUBECONFIG
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# otherwise set it to ~/.kube/config
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KUBECONFIG="${KUBECONFIG:=$HOME/.kube/config}"
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for conf in $(_kube_ps1_split : "${KUBECONFIG}"); do
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# TODO: check existence of $conf
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if _kube_ps1_file_newer_than "${conf}" "${KUBE_PS1_LAST_TIME}"; then
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_kube_ps1_get_context_ns
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return
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fi
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done
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}
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_kube_ps1_get_context_ns() {
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# Set the command time
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KUBE_PS1_LAST_TIME=$(date +%s)
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if [[ "${KUBE_PS1_DEFAULT}" == true ]]; then
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local KUBE_BINARY="${KUBE_PS1_PLATFORM}"
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elif [[ "${KUBE_PS1_DEFAULT}" == false ]] && [[ "${KUBE_PS1_PLATFORM}" == "kubectl" ]];then
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local KUBE_BINARY="kubectl"
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elif [[ "${KUBE_PS1_PLATFORM}" == "oc" ]]; then
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local KUBE_BINARY="oc"
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fi
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KUBE_PS1_CONTEXT="$(${KUBE_BINARY} config current-context)"
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KUBE_PS1_NAMESPACE="$(${KUBE_BINARY} config view --minify --output 'jsonpath={..namespace}')"
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# Set namespace to default if it is not defined
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KUBE_PS1_NAMESPACE="${KUBE_PS1_NAMESPACE:-default}"
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}
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# source our symbol
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kube_ps1_label
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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_DEFAULT_LABEL"
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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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