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updating kube-ps1 to align with upstream changes (#6995)
This commit is contained in:
Jon Mosco
Marc Cornellà
parent
d302e3eebe
commit
a3ab45db8b
@ -1,13 +1,12 @@
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Kubernetes prompt for zsh
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=========================
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# Kubernetes prompt for zsh
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A Kubernetes (k8s) zsh prompt that displays the current cluster cluster
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A Kubernetes zsh prompt that displays the current cluster cluster
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and the namespace.
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Inspired by several tools used to simplify usage of kubectl
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NOTE: If you are not using zsh, check out [kube-ps1](https://github.com/jonmosco/kube-ps1) designed for bash
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as well as zsh.
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NOTE: If you are not using zsh, check out [kube-ps1](https://github.com/jonmosco/kube-ps1)
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designed for bash as well as zsh.
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## Requirements
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@ -32,28 +31,33 @@ fast switching between clusters and namespaces.
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The prompt layout is:
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```
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(<logo>|<cluster>:<namespace>)
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(<symbol>|<cluster>:<namespace>)
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```
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Supported platforms:
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* k8s - Kubernetes
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* ocp - OpenShift
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## Enabling
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## Install
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In order to use kube-ps1 with Oh My Zsh, you'll need to enable them in the
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.zshrc file. You'll find the zshrc file in your $HOME directory. Open it with
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your favorite text editor and you'll see a spot to list all the plugins you
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want to load.
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1. Clone this repository
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2. Source the kube-ps1.zsh in your ~./.zshrc
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ZSH:
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```shell
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vim $HOME/.zshrc
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```
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source path/kube-ps1.sh
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PROMPT='$(kube_ps1) '
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Add kube-ps1 to the list of enabled plugins:
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```shell
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plugins=(
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git
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kube-ps1
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)
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```
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## Colors
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The colors are of my opinion. Blue was used as the prefix to match the Kubernetes
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color as closely as possible. Red was chosen as the cluster name to stand out, and cyan
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Blue was used as the prefix to match the Kubernetes color as closely as
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possible. Red was chosen as the cluster name to stand out, and cyan
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for the namespace. These can of course be changed.
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## Customization
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@ -62,14 +66,15 @@ The default settings can be overridden in ~/.zshrc
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| Variable | Default | Meaning |
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| :------- | :-----: | ------- |
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| `KUBE_PS1_DEFAULT` | `true` | Default settings for the prompt |
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| `KUBE_PS1_BINARY` | `kubectl` | Default Kubernetes binary |
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| `KUBE_PS1_PREFIX` | `(` | Prompt opening character |
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| `KUBE_PS1_DEFAULT_LABEL` | `⎈ ` | Default prompt symbol |
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| `KUBE_PS1_SYMBOL_ENABLE` | `true ` | Display the prompt Symbol. If set to `false`, this will also disable `KUBE_PS1_SEPARATOR` |
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| `KUBE_PS1_SYMBOL_DEFAULT` | `⎈ ` | Default prompt symbol. Unicode `\u2388` |
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| `KUBE_PS1_SYMBOL_USE_IMG` | `false` | ☸️ , Unicode `\u2638` as the prompt symbol |
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| `KUBE_PS1_NS_ENABLE` | `true` | Display the namespace. If set to `false`, this will also disable `KUBE_PS1_DIVIDER` |
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| `KUBE_PS1_SEPERATOR` | `\|` | Separator between symbol and cluster name |
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| `KUBE_PS1_PLATFORM` | `kubectl` | Cluster type and binary to use |
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| `KUBE_PS1_DIVIDER` | `:` | Separator between cluster and namespace |
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| `KUBE_PS1_SUFFIX` | `)` | Prompt closing character |
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| `KUBE_PS1_DEFAULT_LABEL_IMG` | `false` | Use Kubernetes img as the label: ☸️ |
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## Contributors
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@ -1,9 +1,10 @@
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#!/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 2017 Jon Mosco
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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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@ -21,32 +22,39 @@
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[[ -n $DEBUG ]] && set -x
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setopt PROMPT_SUBST
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add-zsh-hook precmd _kube_ps1_load
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autoload -U add-zsh-hook
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add-zsh-hook precmd _kube_ps1_update_cache
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zmodload zsh/stat
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zmodload zsh/datetime
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# Default values for the prompt
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# Override these values in ~/.zshrc or ~/.bashrc
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KUBE_PS1_DEFAULT="${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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# 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_label () {
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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_DEFAULT_LABEL_IMG}" == false ]] && return
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_kube_ps1_symbol() {
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[[ "${KUBE_PS1_SYMBOL_ENABLE}" == false ]] && return
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if [[ "${KUBE_PS1_DEFAULT_LABEL_IMG}" == true ]]; then
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local KUBE_LABEL="☸️ "
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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="${KUBE_PS1_SYMBOL_IMG}"
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fi
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KUBE_PS1_DEFAULT_LABEL="${KUBE_LABEL}"
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echo "${KUBE_PS1_SYMBOL}"
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}
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_kube_ps1_split() {
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@ -56,23 +64,45 @@ _kube_ps1_split() {
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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 "${check_time}" ]
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zmodload -e "zsh/stat"
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if [[ "$?" -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_load() {
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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 $KUBECONFIG
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# otherwise set it to ~/.kube/config
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KUBECONFIG="${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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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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@ -83,26 +113,20 @@ _kube_ps1_load() {
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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=$(date +%s)
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KUBE_PS1_LAST_TIME=$EPOCHSECONDS
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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 [[ "${KUBE_PS1_PLATFORM}" == "oc" ]]; then
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local KUBE_BINARY="oc"
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KUBE_PS1_CONTEXT="$(${KUBE_PS1_BINARY} config current-context 2>/dev/null)"
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if [[ -z "${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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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="${KUBE_PS1_NAMESPACE:-default}"
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}
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# source our symbol
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kube_ps1_label
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# Build our prompt
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kube_ps1 () {
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local reset_color="%f"
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@ -111,7 +135,7 @@ kube_ps1 () {
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local cyan="%F{cyan}"
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KUBE_PS1="${reset_color}$KUBE_PS1_PREFIX"
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KUBE_PS1+="${blue}$KUBE_PS1_DEFAULT_LABEL"
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KUBE_PS1+="${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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