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/*
Copyright 2016 The Kubernetes Authors All rights reserved.
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.
*/
package cmd
import (
"bytes"
"io"
"os"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"k8s.io/minikube/pkg/minikube/exit"
)
const longDescription = `
Outputs minikube shell completion for the given shell (bash or zsh)
This depends on the bash-completion binary. Example installation instructions:
OS X:
$ brew install bash-completion
$ source $(brew --prefix)/etc/bash_completion
$ minikube completion bash > ~/.minikube-completion # for bash users
$ minikube completion zsh > ~/.minikube-completion # for zsh users
$ source ~/.minikube-completion
Ubuntu:
$ apt-get install bash-completion
$ source /etc/bash-completion
$ source <(minikube completion bash) # for bash users
$ source <(minikube completion zsh) # for zsh users
Additionally, you may want to output the completion to a file and source in your .bashrc
Note for zsh users: [1] zsh completions are only supported in versions of zsh >= 5.2
`
const boilerPlate = `
# 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.
`
var completionCmd = &cobra.Command{
Use: "completion SHELL",
Short: "Outputs minikube shell completion for the given shell (bash or zsh)",
Long: longDescription,
Run: func(cmd *cobra.Command, args []string) {
if len(args) != 1 {
exit.Usage("Usage: minikube completion SHELL")
}
if args[0] != "bash" && args[0] != "zsh" {
exit.Usage("Sorry, completion support is not yet implemented for %q", args[0])
} else if args[0] == "bash" {
err := GenerateBashCompletion(os.Stdout, cmd.Parent())
if err != nil {
exit.WithError("bash completion failed", err)
}
} else {
err := GenerateZshCompletion(os.Stdout, cmd.Parent())
if err != nil {
exit.WithError("zsh completion failed", err)
}
}
},
}
func GenerateBashCompletion(w io.Writer, cmd *cobra.Command) error {
_, err := w.Write([]byte(boilerPlate))
if err != nil {
return err
}
err = cmd.GenBashCompletion(w)
if err != nil {
return errors.Wrap(err, "Error generating bash completion")
}
return nil
}
func GenerateZshCompletion(out io.Writer, cmd *cobra.Command) error {
zsh_initialization := `#compdef minikube
__minikube_bash_source() {
alias shopt=':'
alias _expand=_bash_expand
alias _complete=_bash_comp
emulate -L sh
setopt kshglob noshglob braceexpand
source "$@"
}
__minikube_type() {
# -t is not supported by zsh
if [ "$1" == "-t" ]; then
shift
# fake Bash 4 to disable "complete -o nospace". Instead
# "compopt +-o nospace" is used in the code to toggle trailing
# spaces. We don't support that, but leave trailing spaces on
# all the time
if [ "$1" = "__minikube_compopt" ]; then
echo builtin
return 0
fi
fi
type "$@"
}
__minikube_compgen() {
local completions w
completions=( $(compgen "$@") ) || return $?
# filter by given word as prefix
while [[ "$1" = -* && "$1" != -- ]]; do
shift
shift
done
if [[ "$1" == -- ]]; then
shift
fi
for w in "${completions[@]}"; do
if [[ "${w}" = "$1"* ]]; then
echo "${w}"
fi
done
}
__minikube_compopt() {
true # don't do anything. Not supported by bashcompinit in zsh
}
__minikube_declare() {
if [ "$1" == "-F" ]; then
whence -w "$@"
else
builtin declare "$@"
fi
}
__minikube_ltrim_colon_completions()
{
if [[ "$1" == *:* && "$COMP_WORDBREAKS" == *:* ]]; then
# Remove colon-word prefix from COMPREPLY items
local colon_word=${1%${1##*:}}
local i=${#COMPREPLY[*]}
while [[ $((--i)) -ge 0 ]]; do
COMPREPLY[$i]=${COMPREPLY[$i]#"$colon_word"}
done
fi
}
__minikube_get_comp_words_by_ref() {
cur="${COMP_WORDS[COMP_CWORD]}"
prev="${COMP_WORDS[${COMP_CWORD}-1]}"
words=("${COMP_WORDS[@]}")
cword=("${COMP_CWORD[@]}")
}
__minikube_filedir() {
local RET OLD_IFS w qw
__debug "_filedir $@ cur=$cur"
if [[ "$1" = \~* ]]; then
# somehow does not work. Maybe, zsh does not call this at all
eval echo "$1"
return 0
fi
OLD_IFS="$IFS"
IFS=$'\n'
if [ "$1" = "-d" ]; then
shift
RET=( $(compgen -d) )
else
RET=( $(compgen -f) )
fi
IFS="$OLD_IFS"
IFS="," __debug "RET=${RET[@]} len=${#RET[@]}"
for w in ${RET[@]}; do
if [[ ! "${w}" = "${cur}"* ]]; then
continue
fi
if eval "[[ \"\${w}\" = *.$1 || -d \"\${w}\" ]]"; then
qw="$(__minikube_quote "${w}")"
if [ -d "${w}" ]; then
COMPREPLY+=("${qw}/")
else
COMPREPLY+=("${qw}")
fi
fi
done
}
__minikube_quote() {
if [[ $1 == \'* || $1 == \"* ]]; then
# Leave out first character
printf %q "${1:1}"
else
printf %q "$1"
fi
}
autoload -U +X bashcompinit && bashcompinit
# use word boundary patterns for BSD or GNU sed
LWORD='[[:<:]]'
RWORD='[[:>:]]'
if sed --help 2>&1 | grep -q GNU; then
LWORD='\<'
RWORD='\>'
fi
__minikube_convert_bash_to_zsh() {
sed \
-e 's/declare -F/whence -w/' \
-e 's/_get_comp_words_by_ref "\$@"/_get_comp_words_by_ref "\$*"/' \
-e 's/local \([a-zA-Z0-9_]*\)=/local \1; \1=/' \
-e 's/flags+=("\(--.*\)=")/flags+=("\1"); two_word_flags+=("\1")/' \
-e 's/must_have_one_flag+=("\(--.*\)=")/must_have_one_flag+=("\1")/' \
-e "s/${LWORD}_filedir${RWORD}/__minikube_filedir/g" \
-e "s/${LWORD}_get_comp_words_by_ref${RWORD}/__minikube_get_comp_words_by_ref/g" \
-e "s/${LWORD}__ltrim_colon_completions${RWORD}/__minikube_ltrim_colon_completions/g" \
-e "s/${LWORD}compgen${RWORD}/__minikube_compgen/g" \
-e "s/${LWORD}compopt${RWORD}/__minikube_compopt/g" \
-e "s/${LWORD}declare${RWORD}/__minikube_declare/g" \
-e "s/\\\$(type${RWORD}/\$(__minikube_type/g" \
<<'BASH_COMPLETION_EOF'
`
_, err := out.Write([]byte(boilerPlate))
if err != nil {
return err
}
_, err = out.Write([]byte(zsh_initialization))
if err != nil {
return err
}
buf := new(bytes.Buffer)
err = cmd.GenBashCompletion(buf)
if err != nil {
return errors.Wrap(err, "Error generating zsh completion")
}
_, err = out.Write(buf.Bytes())
if err != nil {
return err
}
zsh_tail := `
BASH_COMPLETION_EOF
}
__minikube_bash_source <(__minikube_convert_bash_to_zsh)
`
_, err = out.Write([]byte(zsh_tail))
if err != nil {
return err
}
return nil
}
func init() {
RootCmd.AddCommand(completionCmd)
}