k3s/pkg/cli/completion/completion.go

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package completion
import (
"fmt"
"os"
"github.com/k3s-io/k3s/pkg/version"
"github.com/urfave/cli"
)
func Run(ctx *cli.Context) error {
if ctx.NArg() < 1 {
return fmt.Errorf("must provide a valid SHELL argument")
}
shell := ctx.Args()[0]
completetionScript, err := genCompletionScript(shell)
if err != nil {
return err
}
if ctx.Bool("i") {
return writeToRC(shell)
}
fmt.Println(completetionScript)
return nil
}
func genCompletionScript(shell string) (string, error) {
var completionScript string
if shell == "bash" {
completionScript = fmt.Sprintf(`#! /bin/bash
_cli_bash_autocomplete() {
if [[ "${COMP_WORDS[0]}" != "source" ]]; then
local cur opts base
COMPREPLY=()
cur="${COMP_WORDS[COMP_CWORD]}"
if [[ "$cur" == "-"* ]]; then
opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} ${cur} --generate-bash-completion )
else
opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} --generate-bash-completion )
fi
COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
return 0
fi
}
complete -o bashdefault -o default -o nospace -F _cli_bash_autocomplete %s
`, version.Program)
} else if shell == "zsh" {
completionScript = fmt.Sprintf(`#compdef %[1]s
_cli_zsh_autocomplete() {
local -a opts
local cur
cur=${words[-1]}
if [[ "$cur" == "-"* ]]; then
opts=("${(@f)$(_CLI_ZSH_AUTOCOMPLETE_HACK=1 ${words[@]:0:#words[@]-1} ${cur} --generate-bash-completion)}")
else
opts=("${(@f)$(_CLI_ZSH_AUTOCOMPLETE_HACK=1 ${words[@]:0:#words[@]-1} --generate-bash-completion)}")
fi
if [[ "${opts[1]}" != "" ]]; then
_describe 'values' opts
else
_files
fi
return
}
compdef _cli_zsh_autocomplete %[1]s`, version.Program)
} else {
return "", fmt.Errorf("unknown shell: %s", shell)
}
return completionScript, nil
}
func writeToRC(shell string) error {
rcFileName := ""
if shell == "bash" {
rcFileName = "/.bashrc"
} else if shell == "zsh" {
rcFileName = "/.zshrc"
}
home, err := os.UserHomeDir()
if err != nil {
return nil
}
rcFileName = home + rcFileName
f, err := os.OpenFile(rcFileName, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return err
}
defer f.Close()
bashEntry := fmt.Sprintf("# >> %[1]s command completion (start)\n. <(%[1]s completion %s)\n# >> %[1]s command completion (end)", version.Program, shell)
if _, err := f.WriteString(bashEntry); err != nil {
return err
}
fmt.Printf("Autocomplete for %s added to: %s\n", shell, rcFileName)
return nil
}