Merge pull request #194 from jonmosco/fish_port

fish port finally.  Going to need lots of work.  First time diving in…

Author: jonmosco

kube-ps1.fish

@@ -0,0 +1,307 @@
+#!/usr/bin/env fish
+
+# Kubernetes prompt helper for bash/zsh/fish
+# Displays current context and namespace
+
+# Copyright 2024 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
+# $fish trace
+
+if set -q _KUBE_PS1_BINARY
+  set -l _KUBE_PS1_BINARY kubectl
+end
+
+if set -q _KUBE_PS1_SYMBOL_ENABLE
+  set _KUBE_PS1_SYMBOL_ENABLE true
+end
+
+if set -q _KUBE_PS1_SYMBOL_PADDING
+  set _KUBE_PS1_SYMBOL_PADDING false
+end
+
+if set -q _KUBE_PS1_SYMBOL_USE_IMG
+  set _KUBE_PS1_SYMBOL_USE_IMG false
+end
+
+if set -q _KUBE_PS1_SYMBOL_OC_IMG
+  set _KUBE_PS1_SYMBOL_OC_IMG false
+end
+
+if set -q _KUBE_PS1_NS_ENABLE
+  set _KUBE_PS1_NS_ENABLE true
+end
+
+if set -q _KUBE_PS1_CONTEXT_ENABLE
+  set _KUBE_PS1_CONTEXT_ENABLE true
+end
+
+if test -n _KUBE_PS1_PREFIX
+  set -g _KUBE_PS1_PREFIX "("
+end
+
+if set -q _KUBE_PS1_SEPARATOR
+  set -g _KUBE_PS1_SEPARATOR "|"
+end
+
+if set -q _KUBE_PS1_DIVIDER
+  set -g _KUBE_PS1_DIVIDER ":"
+end
+
+if set -q _KUBE_PS1_SUFFIX
+  set -g _KUBE_PS1_SUFFIX ")"
+end
+
+#  if set -q "$_KUBE_PS1_SYMBOL_COLOR"
+#    set _KUBE_PS1_SYMBOL_COLOR blue
+#  end
+
+# 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}"
+
+# set -g color_ctx (set_color $KUBE_PROMPT_COLOR_CTX)
+# set -g color_ns (set_color $KUBE_PROMPT_COLOR_NS)
+
+# KUBE_PS1_CLUSTER_FUNCTION="${KUBE_PS1_CLUSTER_FUNCTION}"
+# KUBE_PS1_NAMESPACE_FUNCTION="${KUBE_PS1_NAMESPACE_FUNCTION}"
+
+set -g  _KUBE_PS1_DISABLE_PATH $HOME/.kube/kube-ps1/disabled
+set -g _KUBE_PS1_KUBECONFIG_CACHE KUBECONFIG
+set -g _KUBE_PS1_LAST_TIME 0
+
+# function kube_ps1_color_fg
+# end
+
+# function kube_ps1_color_bg
+# end
+
+function kube_ps1_binary_check
+    command -q $1
+end
+
+## DONE ##
+function _kube_ps1_split_config
+    string split ":" $argv
+end
+
+## DONE ##
+function _kube_ps1_file_newer_than
+    set -l mtime
+    set -l file $argv[1]
+    set -l check_time $argv[2]
+
+    # file modification time options from kube-ps1
+    if stat -c "%s" /dev/null &> /dev/null
+        # GNU stat
+        set -l mtime (stat -L -c %Y "$file")
+    else
+        # BSD stat
+        set -l mtime (stat -L -f %m "$file")
+    end
+
+    [ "$mtime" -gt "$check_time" ]
+end
+
+# TODO: Lots of work needed here
+function kube_ps1_prompt_update
+    set -l return_code $status
+
+  [ "$KUBE_PS1_ENABLED" = "off" ] and return $return_code
+
+  if ! _kube_ps1_binary_check "$KUBE_PS1_BINARY"
+      # No ability to fetch context/namespace; display N/A.
+      set -l KUBE_PS1_CONTEXT "BINARY-N/A"
+      set -l KUBE_PS1_NAMESPACE "N/A"
+      return $return_code
+  end
+
+  if [ "$KUBECONFIG" != "$_KUBE_PS1_KUBECONFIG_CACHE" ]
+      # User changed KUBECONFIG; unconditionally refetch.
+      set -l _KUBE_PS1_KUBECONFIG_CACHE $KUBECONFIG
+      _kube_ps1_get_context_ns
+      return $return_code
+  end
+
+  local conf
+  local config_file_cache
+
+  # kubectl will read the environment variable $KUBECONFIG
+  # otherwise set it to ~/.kube/config
+  set -l kubeconfig "$KUBECONFIG"
+  if set -q "$kubeconfig"
+      set kubeconfig "$HOME/.kube/config"
+  end
+
+  for conf in _kube_ps1_split_config "$kubeconfig"
+      [ -r "$conf" ] or continue
+      set -a config_file_cache conf
+      if _kube_ps1_file_newer_than "$conf" "$_KUBE_PS1_LAST_TIME"
+          _kube_ps1_get_context_ns
+          return $return_code
+      end
+  end
+
+  if [ "$config_file_cache" != "$_KUBE_PS1_CFGFILES_READ_CACHE" ]
+      _kube_ps1_get_context_ns
+      return $return_code
+  end
+
+  return $return_code
+end
+
+## DONE ##
+function _kube_ps1_get_context
+  if [ "$KUBE_PS1_CONTEXT_ENABLE" = true ]
+      set -g _KUBE_PS1_CONTEXT $_KUBE_PS1_BINARY config current-context 2>/dev/null
+
+      if not test -e "_KUBE_PS1_CONTEXT"
+          set _KUBE_PS1_CONTEXT "N/A"
+      end
+  end
+end
+
+## DONE ##
+function _kube_ps1_get_ns
+    if [ "$KUBE_PS1_NS_ENABLE" = true ]
+        set -g _KUBE_PS1_NAMESPACE $_KUBE_PS1_BINARY config view --minify --output 'jsonpath={..namespace}' 2>/dev/null
+
+        if test -z "_KUBE_PS1_NAMESPACE"
+            set _KUBE_PS1_NAMESPACE "N/A"
+        end
+    end
+end
+
+function kube_ps1_get_ctx_ns
+  # Set the command time
+  set -l _KUBE_PS1_LAST_TIME (date +%s)
+
+  set -q KUBE_PS1_CONTEXT; or set -l KUBE_PS1_CONTEXT "N/A"
+  set -q KUBE_PS1_NAMESPACE; or set -l KUBE_PS1_NAMESPACE "N/A"
+
+  # Cache which cfgfiles we can read in case they change.
+  set -l conf
+
+  set -l kubeconfig "$KUBECONFIG"
+  if set -q "$kubeconfig"
+      set -l kubeconfig "$HOME/.kube/config"
+  end
+
+  # _KUBE_PS1_CFGFILES_READ_CACHE=
+  for conf in _kube_ps1_split_config $kubeconfig
+      [ -r $conf ]; and set -a conf _KUBE_PS1_CFGFILES_READ_CACHE
+  end
+
+  _kube_ps1_get_context
+  _kube_ps1_get_ns
+
+  set -g KUBE_PS1_CONTEXT "N/A"
+  set -g KUBE_PS1_NAMESPACE "N/A"
+end
+
+function _kube_ps1_symbol
+  [ "$KUBE_PS1_SYMBOL_ENABLE" = false ]; and return
+
+  set -l KUBE_PS1_SYMBOL \u2638
+
+  if [ "$KUBE_PS1_SYMBOL_USE_IMG" = true ]
+      set -l KUBE_PS1_SYMBOL "$KUBE_PS1_SYMBOL_IMG"
+  end
+
+  # OpenShift glyph
+  # NOTE: this requires a patched "Nerd" font to work
+  # https://www.nerdfonts.com/
+  if [ "$KUBE_PS1_SYMBOL_OC_IMG" = true ]
+      set -l KUBE_PS1_SYMBOL \ue7b7
+  end
+
+  if [ "$KUBE_PS1_SYMBOL_PADDING" = true ]
+      echo "$KUBE_PS1_SYMBOL "
+  else
+      echo "$KUBE_PS1_SYMBOL"
+  end
+end
+
+## DONE ##
+function _kubeon_usage
+    echo "Toggle kube-ps1 prompt on"
+    echo
+    echo "Usage: kubeon [-g | --global] [-h | --help]"
+    echo
+    echo "With no arguments, turn oon kube-ps1 status for this shell instance (default)."
+    echo
+    echo "  -g --global  turn on kube-ps1 status globally"
+    echo "  -h --help    print this message"
+end
+
+## DONE ##
+function _kubeoff_usage
+    echo "Toggle kube-ps1 prompt off"
+    echo
+    echo "Usage: kubeoff [-g | --global] [-h | --help]"
+    echo
+    echo "With no arguments, turn off kube-ps1 status for this shell instance (default)."
+    echo
+    echo "  -g --global turn off kube-ps1 status globally"
+    echo "  -h --help   print this message"
+end
+
+function kube_ps1_on
+    argparse h/help g/global -- $argv
+    or return
+
+    if set -ql _flag_help
+        _kubeon_usage
+        return 0
+    end
+
+    if set -ql _flag_second
+        rm -f -- "$_KUBE_PS1_DISABLE_PATH"
+    end
+
+    set -g _KUBE_PS1_ENABLED on
+end
+
+function kube_ps1_off
+    argparse h/help g/global -- $argv
+    or return
+
+    if set -ql _flag_help
+        _kubeon_usage
+        return 0
+    end
+
+    if set -ql _flag_second
+        mkdir -p -- "(path basename "$_KUBE_PS1_DISABLE_PATH")"
+        touch -- "$_KUBE_PS1_DISABLE_PATH"
+    end
+
+    set -g _KUBE_PS1_ENABLED off
+end
+
+# Build our prompt
+function kube_ps1
+
+    echo "$_KUBE_PS1_PREFIX" \
+        (_kube_ps1_symbol) \
+        "$_KUBE_PS1_SEPARATOR" \
+        (_kube_ps1_get_context) \
+        "$_KUBE_PS1_DIVIDER" \
+        (_kube_ps1_get_ns) \
+        "$_KUBE_PS1_SUFFIX"
+
+      # echo (set_color blue)$KUBECTL_PROMPT_ICON" "(set_color cyan)"($context"(set_color white)"$KUBECTL_PROMPT_SEPARATOR"(set_color yellow)"$ns)"
+
+end