package main

import (
	"fmt"
	"os"

	"github.com/urfave/cli/v2"
)

var cmdHook = &cli.Command{
	Name:  "hook",
	Usage: "Prints the shell function used to execute " + appName,
	Subcommands: []*cli.Command{
		{
			Name: "bash",
			Action: func(_ *cli.Context) error {
				_, err := os.Stdout.WriteString(fmt.Sprintf(`: ${PROG:=%s}

# Macs have bash3 for which the bash-completion package doesn't include
# _init_completion. This is a minimal version of that function.
_cli_init_completion() {
  COMPREPLY=()
  _get_comp_words_by_ref "$@" cur prev words cword
}

_cli_bash_autocomplete() {
  if [[ "${COMP_WORDS[0]}" != "source" ]]; then
    local cur opts base words
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    if declare -F _init_completion >/dev/null 2>&1; then
      _init_completion -n "=:" || return
    else
      _cli_init_completion -n "=:" || return
    fi
    words=("${words[@]:0:$cword}")
    if [[ "$cur" == "-"* ]]; then
      requestComp="${words[*]} ${cur} --generate-bash-completion"
    else
      requestComp="${words[*]} --generate-bash-completion"
    fi
    opts=$(eval "${requestComp}" 2>/dev/null)
    COMPREPLY=($(compgen -W "${opts}" -- ${cur}))
    return 0
  fi
}

complete -o bashdefault -o default -o nospace -F _cli_bash_autocomplete $PROG
unset PROG`, appName))
				return err
			},
		},
	},
}