302 lines
10 KiB
Bash
302 lines
10 KiB
Bash
|
|
# Copyright 2016 The Kubernetes Authors.
|
|
#
|
|
# 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.
|
|
# bash completion V2 for kubectl -*- shell-script -*-
|
|
|
|
__kubectl_debug()
|
|
{
|
|
if [[ -n ${BASH_COMP_DEBUG_FILE:-} ]]; then
|
|
echo "$*" >> "${BASH_COMP_DEBUG_FILE}"
|
|
fi
|
|
}
|
|
|
|
# Macs have bash3 for which the bash-completion package doesn't include
|
|
# _init_completion. This is a minimal version of that function.
|
|
__kubectl_init_completion()
|
|
{
|
|
COMPREPLY=()
|
|
_get_comp_words_by_ref "$@" cur prev words cword
|
|
}
|
|
|
|
# This function calls the kubectl program to obtain the completion
|
|
# results and the directive. It fills the 'out' and 'directive' vars.
|
|
__kubectl_get_completion_results() {
|
|
local requestComp lastParam lastChar args
|
|
|
|
# Prepare the command to request completions for the program.
|
|
# Calling ${words[0]} instead of directly kubectl allows to handle aliases
|
|
args=("${words[@]:1}")
|
|
requestComp="${words[0]} __completeNoDesc ${args[*]}"
|
|
|
|
lastParam=${words[$((${#words[@]}-1))]}
|
|
lastChar=${lastParam:$((${#lastParam}-1)):1}
|
|
__kubectl_debug "lastParam ${lastParam}, lastChar ${lastChar}"
|
|
|
|
if [ -z "${cur}" ] && [ "${lastChar}" != "=" ]; then
|
|
# If the last parameter is complete (there is a space following it)
|
|
# We add an extra empty parameter so we can indicate this to the go method.
|
|
__kubectl_debug "Adding extra empty parameter"
|
|
requestComp="${requestComp} ''"
|
|
fi
|
|
|
|
# When completing a flag with an = (e.g., kubectl -n=<TAB>)
|
|
# bash focuses on the part after the =, so we need to remove
|
|
# the flag part from $cur
|
|
if [[ "${cur}" == -*=* ]]; then
|
|
cur="${cur#*=}"
|
|
fi
|
|
|
|
__kubectl_debug "Calling ${requestComp}"
|
|
# Use eval to handle any environment variables and such
|
|
out=$(eval "${requestComp}" 2>/dev/null)
|
|
|
|
# Extract the directive integer at the very end of the output following a colon (:)
|
|
directive=${out##*:}
|
|
# Remove the directive
|
|
out=${out%:*}
|
|
if [ "${directive}" = "${out}" ]; then
|
|
# There is not directive specified
|
|
directive=0
|
|
fi
|
|
__kubectl_debug "The completion directive is: ${directive}"
|
|
__kubectl_debug "The completions are: ${out[*]}"
|
|
}
|
|
|
|
__kubectl_process_completion_results() {
|
|
local shellCompDirectiveError=1
|
|
local shellCompDirectiveNoSpace=2
|
|
local shellCompDirectiveNoFileComp=4
|
|
local shellCompDirectiveFilterFileExt=8
|
|
local shellCompDirectiveFilterDirs=16
|
|
|
|
if [ $((directive & shellCompDirectiveError)) -ne 0 ]; then
|
|
# Error code. No completion.
|
|
__kubectl_debug "Received error from custom completion go code"
|
|
return
|
|
else
|
|
if [ $((directive & shellCompDirectiveNoSpace)) -ne 0 ]; then
|
|
if [[ $(type -t compopt) = "builtin" ]]; then
|
|
__kubectl_debug "Activating no space"
|
|
compopt -o nospace
|
|
else
|
|
__kubectl_debug "No space directive not supported in this version of bash"
|
|
fi
|
|
fi
|
|
if [ $((directive & shellCompDirectiveNoFileComp)) -ne 0 ]; then
|
|
if [[ $(type -t compopt) = "builtin" ]]; then
|
|
__kubectl_debug "Activating no file completion"
|
|
compopt +o default
|
|
else
|
|
__kubectl_debug "No file completion directive not supported in this version of bash"
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
if [ $((directive & shellCompDirectiveFilterFileExt)) -ne 0 ]; then
|
|
# File extension filtering
|
|
local fullFilter filter filteringCmd
|
|
|
|
# Do not use quotes around the $out variable or else newline
|
|
# characters will be kept.
|
|
for filter in ${out[*]}; do
|
|
fullFilter+="$filter|"
|
|
done
|
|
|
|
filteringCmd="_filedir $fullFilter"
|
|
__kubectl_debug "File filtering command: $filteringCmd"
|
|
$filteringCmd
|
|
elif [ $((directive & shellCompDirectiveFilterDirs)) -ne 0 ]; then
|
|
# File completion for directories only
|
|
|
|
# Use printf to strip any trailing newline
|
|
local subdir
|
|
subdir=$(printf "%s" "${out[0]}")
|
|
if [ -n "$subdir" ]; then
|
|
__kubectl_debug "Listing directories in $subdir"
|
|
pushd "$subdir" >/dev/null 2>&1 && _filedir -d && popd >/dev/null 2>&1 || return
|
|
else
|
|
__kubectl_debug "Listing directories in ."
|
|
_filedir -d
|
|
fi
|
|
else
|
|
__kubectl_handle_completion_types
|
|
fi
|
|
|
|
__kubectl_handle_special_char "$cur" :
|
|
__kubectl_handle_special_char "$cur" =
|
|
}
|
|
|
|
__kubectl_handle_completion_types() {
|
|
__kubectl_debug "__kubectl_handle_completion_types: COMP_TYPE is $COMP_TYPE"
|
|
|
|
case $COMP_TYPE in
|
|
37|42)
|
|
# Type: menu-complete/menu-complete-backward and insert-completions
|
|
# If the user requested inserting one completion at a time, or all
|
|
# completions at once on the command-line we must remove the descriptions.
|
|
# https://github.com/spf13/cobra/issues/1508
|
|
local tab comp
|
|
tab=$(printf '\t')
|
|
while IFS='' read -r comp; do
|
|
# Strip any description
|
|
comp=${comp%%$tab*}
|
|
# Only consider the completions that match
|
|
comp=$(compgen -W "$comp" -- "$cur")
|
|
if [ -n "$comp" ]; then
|
|
COMPREPLY+=("$comp")
|
|
fi
|
|
done < <(printf "%s\n" "${out[@]}")
|
|
;;
|
|
|
|
*)
|
|
# Type: complete (normal completion)
|
|
__kubectl_handle_standard_completion_case
|
|
;;
|
|
esac
|
|
}
|
|
|
|
__kubectl_handle_standard_completion_case() {
|
|
local tab comp
|
|
tab=$(printf '\t')
|
|
|
|
local longest=0
|
|
# Look for the longest completion so that we can format things nicely
|
|
while IFS='' read -r comp; do
|
|
# Strip any description before checking the length
|
|
comp=${comp%%$tab*}
|
|
# Only consider the completions that match
|
|
comp=$(compgen -W "$comp" -- "$cur")
|
|
if ((${#comp}>longest)); then
|
|
longest=${#comp}
|
|
fi
|
|
done < <(printf "%s\n" "${out[@]}")
|
|
|
|
local completions=()
|
|
while IFS='' read -r comp; do
|
|
if [ -z "$comp" ]; then
|
|
continue
|
|
fi
|
|
|
|
__kubectl_debug "Original comp: $comp"
|
|
comp="$(__kubectl_format_comp_descriptions "$comp" "$longest")"
|
|
__kubectl_debug "Final comp: $comp"
|
|
completions+=("$comp")
|
|
done < <(printf "%s\n" "${out[@]}")
|
|
|
|
while IFS='' read -r comp; do
|
|
COMPREPLY+=("$comp")
|
|
done < <(compgen -W "${completions[*]}" -- "$cur")
|
|
|
|
# If there is a single completion left, remove the description text
|
|
if [ ${#COMPREPLY[*]} -eq 1 ]; then
|
|
__kubectl_debug "COMPREPLY[0]: ${COMPREPLY[0]}"
|
|
comp="${COMPREPLY[0]%% *}"
|
|
__kubectl_debug "Removed description from single completion, which is now: ${comp}"
|
|
COMPREPLY=()
|
|
COMPREPLY+=("$comp")
|
|
fi
|
|
}
|
|
|
|
__kubectl_handle_special_char()
|
|
{
|
|
local comp="$1"
|
|
local char=$2
|
|
if [[ "$comp" == *${char}* && "$COMP_WORDBREAKS" == *${char}* ]]; then
|
|
local word=${comp%"${comp##*${char}}"}
|
|
local idx=${#COMPREPLY[*]}
|
|
while [[ $((--idx)) -ge 0 ]]; do
|
|
COMPREPLY[$idx]=${COMPREPLY[$idx]#"$word"}
|
|
done
|
|
fi
|
|
}
|
|
|
|
__kubectl_format_comp_descriptions()
|
|
{
|
|
local tab
|
|
tab=$(printf '\t')
|
|
local comp="$1"
|
|
local longest=$2
|
|
|
|
# Properly format the description string which follows a tab character if there is one
|
|
if [[ "$comp" == *$tab* ]]; then
|
|
desc=${comp#*$tab}
|
|
comp=${comp%%$tab*}
|
|
|
|
# $COLUMNS stores the current shell width.
|
|
# Remove an extra 4 because we add 2 spaces and 2 parentheses.
|
|
maxdesclength=$(( COLUMNS - longest - 4 ))
|
|
|
|
# Make sure we can fit a description of at least 8 characters
|
|
# if we are to align the descriptions.
|
|
if [[ $maxdesclength -gt 8 ]]; then
|
|
# Add the proper number of spaces to align the descriptions
|
|
for ((i = ${#comp} ; i < longest ; i++)); do
|
|
comp+=" "
|
|
done
|
|
else
|
|
# Don't pad the descriptions so we can fit more text after the completion
|
|
maxdesclength=$(( COLUMNS - ${#comp} - 4 ))
|
|
fi
|
|
|
|
# If there is enough space for any description text,
|
|
# truncate the descriptions that are too long for the shell width
|
|
if [ $maxdesclength -gt 0 ]; then
|
|
if [ ${#desc} -gt $maxdesclength ]; then
|
|
desc=${desc:0:$(( maxdesclength - 1 ))}
|
|
desc+="…"
|
|
fi
|
|
comp+=" ($desc)"
|
|
fi
|
|
fi
|
|
|
|
# Must use printf to escape all special characters
|
|
printf "%q" "${comp}"
|
|
}
|
|
|
|
__start_kubectl()
|
|
{
|
|
local cur prev words cword split
|
|
|
|
COMPREPLY=()
|
|
|
|
# Call _init_completion from the bash-completion package
|
|
# to prepare the arguments properly
|
|
if declare -F _init_completion >/dev/null 2>&1; then
|
|
_init_completion -n "=:" || return
|
|
else
|
|
__kubectl_init_completion -n "=:" || return
|
|
fi
|
|
|
|
__kubectl_debug
|
|
__kubectl_debug "========= starting completion logic =========="
|
|
__kubectl_debug "cur is ${cur}, words[*] is ${words[*]}, #words[@] is ${#words[@]}, cword is $cword"
|
|
|
|
# The user could have moved the cursor backwards on the command-line.
|
|
# We need to trigger completion from the $cword location, so we need
|
|
# to truncate the command-line ($words) up to the $cword location.
|
|
words=("${words[@]:0:$cword+1}")
|
|
__kubectl_debug "Truncated words[*]: ${words[*]},"
|
|
|
|
local out directive
|
|
__kubectl_get_completion_results
|
|
__kubectl_process_completion_results
|
|
}
|
|
|
|
if [[ $(type -t compopt) = "builtin" ]]; then
|
|
complete -o default -F __start_kubectl kubectl
|
|
else
|
|
complete -o default -o nospace -F __start_kubectl kubectl
|
|
fi
|
|
|
|
# ex: ts=4 sw=4 et filetype=sh
|