646 lines
17 KiB
Go
646 lines
17 KiB
Go
package cobra
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import (
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"fmt"
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"io"
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"os"
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"sort"
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"strings"
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"github.com/spf13/pflag"
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)
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// Annotations for Bash completion.
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const (
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BashCompFilenameExt = "cobra_annotation_bash_completion_filename_extensions"
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BashCompCustom = "cobra_annotation_bash_completion_custom"
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BashCompOneRequiredFlag = "cobra_annotation_bash_completion_one_required_flag"
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BashCompSubdirsInDir = "cobra_annotation_bash_completion_subdirs_in_dir"
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)
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func preamble(out io.Writer, name string) error {
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_, err := fmt.Fprintf(out, "# bash completion for %-36s -*- shell-script -*-\n", name)
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if err != nil {
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return err
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}
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preamStr := `
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__debug()
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{
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if [[ -n ${BASH_COMP_DEBUG_FILE} ]]; then
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echo "$*" >> "${BASH_COMP_DEBUG_FILE}"
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fi
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}
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# Homebrew on Macs have version 1.3 of bash-completion which doesn't include
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# _init_completion. This is a very minimal version of that function.
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__my_init_completion()
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{
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COMPREPLY=()
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_get_comp_words_by_ref "$@" cur prev words cword
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}
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__index_of_word()
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{
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local w word=$1
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shift
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index=0
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for w in "$@"; do
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[[ $w = "$word" ]] && return
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index=$((index+1))
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done
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index=-1
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}
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__contains_word()
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{
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local w word=$1; shift
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for w in "$@"; do
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[[ $w = "$word" ]] && return
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done
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return 1
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}
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__handle_reply()
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{
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__debug "${FUNCNAME[0]}"
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case $cur in
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-*)
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if [[ $(type -t compopt) = "builtin" ]]; then
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compopt -o nospace
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fi
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local allflags
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if [ ${#must_have_one_flag[@]} -ne 0 ]; then
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allflags=("${must_have_one_flag[@]}")
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else
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allflags=("${flags[*]} ${two_word_flags[*]}")
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fi
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COMPREPLY=( $(compgen -W "${allflags[*]}" -- "$cur") )
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if [[ $(type -t compopt) = "builtin" ]]; then
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[[ "${COMPREPLY[0]}" == *= ]] || compopt +o nospace
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fi
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# complete after --flag=abc
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if [[ $cur == *=* ]]; then
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if [[ $(type -t compopt) = "builtin" ]]; then
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compopt +o nospace
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fi
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local index flag
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flag="${cur%%=*}"
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__index_of_word "${flag}" "${flags_with_completion[@]}"
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COMPREPLY=()
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if [[ ${index} -ge 0 ]]; then
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PREFIX=""
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cur="${cur#*=}"
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${flags_completion[${index}]}
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if [ -n "${ZSH_VERSION}" ]; then
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# zfs completion needs --flag= prefix
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eval "COMPREPLY=( \"\${COMPREPLY[@]/#/${flag}=}\" )"
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fi
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fi
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fi
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return 0;
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;;
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esac
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# check if we are handling a flag with special work handling
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local index
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__index_of_word "${prev}" "${flags_with_completion[@]}"
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if [[ ${index} -ge 0 ]]; then
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${flags_completion[${index}]}
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return
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fi
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# we are parsing a flag and don't have a special handler, no completion
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if [[ ${cur} != "${words[cword]}" ]]; then
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return
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fi
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local completions
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completions=("${commands[@]}")
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if [[ ${#must_have_one_noun[@]} -ne 0 ]]; then
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completions=("${must_have_one_noun[@]}")
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fi
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if [[ ${#must_have_one_flag[@]} -ne 0 ]]; then
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completions+=("${must_have_one_flag[@]}")
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fi
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COMPREPLY=( $(compgen -W "${completions[*]}" -- "$cur") )
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if [[ ${#COMPREPLY[@]} -eq 0 && ${#noun_aliases[@]} -gt 0 && ${#must_have_one_noun[@]} -ne 0 ]]; then
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COMPREPLY=( $(compgen -W "${noun_aliases[*]}" -- "$cur") )
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fi
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if [[ ${#COMPREPLY[@]} -eq 0 ]]; then
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declare -F __custom_func >/dev/null && __custom_func
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fi
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__ltrim_colon_completions "$cur"
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}
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# The arguments should be in the form "ext1|ext2|extn"
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__handle_filename_extension_flag()
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{
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local ext="$1"
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_filedir "@(${ext})"
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}
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__handle_subdirs_in_dir_flag()
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{
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local dir="$1"
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pushd "${dir}" >/dev/null 2>&1 && _filedir -d && popd >/dev/null 2>&1
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}
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__handle_flag()
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{
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__debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
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# if a command required a flag, and we found it, unset must_have_one_flag()
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local flagname=${words[c]}
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local flagvalue
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# if the word contained an =
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if [[ ${words[c]} == *"="* ]]; then
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flagvalue=${flagname#*=} # take in as flagvalue after the =
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flagname=${flagname%%=*} # strip everything after the =
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flagname="${flagname}=" # but put the = back
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fi
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__debug "${FUNCNAME[0]}: looking for ${flagname}"
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if __contains_word "${flagname}" "${must_have_one_flag[@]}"; then
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must_have_one_flag=()
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fi
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# if you set a flag which only applies to this command, don't show subcommands
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if __contains_word "${flagname}" "${local_nonpersistent_flags[@]}"; then
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commands=()
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fi
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# keep flag value with flagname as flaghash
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if [ -n "${flagvalue}" ] ; then
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flaghash[${flagname}]=${flagvalue}
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elif [ -n "${words[ $((c+1)) ]}" ] ; then
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flaghash[${flagname}]=${words[ $((c+1)) ]}
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else
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flaghash[${flagname}]="true" # pad "true" for bool flag
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fi
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# skip the argument to a two word flag
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if __contains_word "${words[c]}" "${two_word_flags[@]}"; then
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c=$((c+1))
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# if we are looking for a flags value, don't show commands
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if [[ $c -eq $cword ]]; then
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commands=()
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fi
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fi
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c=$((c+1))
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}
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__handle_noun()
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{
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__debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
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if __contains_word "${words[c]}" "${must_have_one_noun[@]}"; then
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must_have_one_noun=()
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elif __contains_word "${words[c]}" "${noun_aliases[@]}"; then
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must_have_one_noun=()
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fi
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nouns+=("${words[c]}")
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c=$((c+1))
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}
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__handle_command()
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{
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__debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
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local next_command
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if [[ -n ${last_command} ]]; then
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next_command="_${last_command}_${words[c]//:/__}"
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else
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if [[ $c -eq 0 ]]; then
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next_command="_$(basename "${words[c]//:/__}")"
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else
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next_command="_${words[c]//:/__}"
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fi
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fi
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c=$((c+1))
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__debug "${FUNCNAME[0]}: looking for ${next_command}"
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declare -F "$next_command" >/dev/null && $next_command
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}
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__handle_word()
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{
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if [[ $c -ge $cword ]]; then
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__handle_reply
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return
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fi
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__debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
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if [[ "${words[c]}" == -* ]]; then
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__handle_flag
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elif __contains_word "${words[c]}" "${commands[@]}"; then
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__handle_command
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elif [[ $c -eq 0 ]] && __contains_word "$(basename "${words[c]}")" "${commands[@]}"; then
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__handle_command
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else
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__handle_noun
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fi
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__handle_word
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}
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`
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_, err = fmt.Fprint(out, preamStr)
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return err
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}
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func postscript(w io.Writer, name string) error {
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name = strings.Replace(name, ":", "__", -1)
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_, err := fmt.Fprintf(w, "__start_%s()\n", name)
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if err != nil {
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return err
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}
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_, err = fmt.Fprintf(w, `{
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local cur prev words cword
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declare -A flaghash 2>/dev/null || :
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if declare -F _init_completion >/dev/null 2>&1; then
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_init_completion -s || return
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else
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__my_init_completion -n "=" || return
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fi
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local c=0
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local flags=()
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local two_word_flags=()
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local local_nonpersistent_flags=()
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local flags_with_completion=()
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local flags_completion=()
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local commands=("%s")
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local must_have_one_flag=()
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local must_have_one_noun=()
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local last_command
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local nouns=()
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__handle_word
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}
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`, name)
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if err != nil {
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return err
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}
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_, err = fmt.Fprintf(w, `if [[ $(type -t compopt) = "builtin" ]]; then
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complete -o default -F __start_%s %s
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else
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complete -o default -o nospace -F __start_%s %s
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fi
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`, name, name, name, name)
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if err != nil {
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return err
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}
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_, err = fmt.Fprintf(w, "# ex: ts=4 sw=4 et filetype=sh\n")
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return err
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}
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func writeCommands(cmd *Command, w io.Writer) error {
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if _, err := fmt.Fprintf(w, " commands=()\n"); err != nil {
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return err
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}
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for _, c := range cmd.Commands() {
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if !c.IsAvailableCommand() || c == cmd.helpCommand {
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continue
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}
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if _, err := fmt.Fprintf(w, " commands+=(%q)\n", c.Name()); err != nil {
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return err
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}
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}
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_, err := fmt.Fprintf(w, "\n")
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return err
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}
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func writeFlagHandler(name string, annotations map[string][]string, w io.Writer) error {
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for key, value := range annotations {
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switch key {
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case BashCompFilenameExt:
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_, err := fmt.Fprintf(w, " flags_with_completion+=(%q)\n", name)
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if err != nil {
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return err
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}
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if len(value) > 0 {
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ext := "__handle_filename_extension_flag " + strings.Join(value, "|")
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_, err = fmt.Fprintf(w, " flags_completion+=(%q)\n", ext)
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} else {
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ext := "_filedir"
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_, err = fmt.Fprintf(w, " flags_completion+=(%q)\n", ext)
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}
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if err != nil {
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return err
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}
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case BashCompCustom:
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_, err := fmt.Fprintf(w, " flags_with_completion+=(%q)\n", name)
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if err != nil {
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return err
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}
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if len(value) > 0 {
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handlers := strings.Join(value, "; ")
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_, err = fmt.Fprintf(w, " flags_completion+=(%q)\n", handlers)
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} else {
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_, err = fmt.Fprintf(w, " flags_completion+=(:)\n")
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}
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if err != nil {
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return err
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}
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case BashCompSubdirsInDir:
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_, err := fmt.Fprintf(w, " flags_with_completion+=(%q)\n", name)
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if len(value) == 1 {
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ext := "__handle_subdirs_in_dir_flag " + value[0]
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_, err = fmt.Fprintf(w, " flags_completion+=(%q)\n", ext)
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} else {
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ext := "_filedir -d"
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_, err = fmt.Fprintf(w, " flags_completion+=(%q)\n", ext)
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}
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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func writeShortFlag(flag *pflag.Flag, w io.Writer) error {
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b := (len(flag.NoOptDefVal) > 0)
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name := flag.Shorthand
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format := " "
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if !b {
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format += "two_word_"
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}
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format += "flags+=(\"-%s\")\n"
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if _, err := fmt.Fprintf(w, format, name); err != nil {
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return err
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}
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return writeFlagHandler("-"+name, flag.Annotations, w)
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}
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func writeFlag(flag *pflag.Flag, w io.Writer) error {
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b := (len(flag.NoOptDefVal) > 0)
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name := flag.Name
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format := " flags+=(\"--%s"
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if !b {
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format += "="
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}
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format += "\")\n"
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if _, err := fmt.Fprintf(w, format, name); err != nil {
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return err
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}
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return writeFlagHandler("--"+name, flag.Annotations, w)
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}
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func writeLocalNonPersistentFlag(flag *pflag.Flag, w io.Writer) error {
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b := (len(flag.NoOptDefVal) > 0)
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name := flag.Name
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format := " local_nonpersistent_flags+=(\"--%s"
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if !b {
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format += "="
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}
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format += "\")\n"
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_, err := fmt.Fprintf(w, format, name)
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return err
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}
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func writeFlags(cmd *Command, w io.Writer) error {
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_, err := fmt.Fprintf(w, ` flags=()
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two_word_flags=()
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local_nonpersistent_flags=()
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flags_with_completion=()
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flags_completion=()
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`)
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if err != nil {
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return err
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}
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localNonPersistentFlags := cmd.LocalNonPersistentFlags()
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var visitErr error
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cmd.NonInheritedFlags().VisitAll(func(flag *pflag.Flag) {
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if nonCompletableFlag(flag) {
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return
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}
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if err := writeFlag(flag, w); err != nil {
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visitErr = err
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return
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}
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if len(flag.Shorthand) > 0 {
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if err := writeShortFlag(flag, w); err != nil {
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visitErr = err
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return
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}
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}
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if localNonPersistentFlags.Lookup(flag.Name) != nil {
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if err := writeLocalNonPersistentFlag(flag, w); err != nil {
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visitErr = err
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return
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}
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}
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})
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if visitErr != nil {
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return visitErr
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}
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cmd.InheritedFlags().VisitAll(func(flag *pflag.Flag) {
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if nonCompletableFlag(flag) {
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return
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}
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if err := writeFlag(flag, w); err != nil {
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visitErr = err
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return
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}
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if len(flag.Shorthand) > 0 {
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if err := writeShortFlag(flag, w); err != nil {
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visitErr = err
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return
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}
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}
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})
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if visitErr != nil {
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return visitErr
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}
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_, err = fmt.Fprintf(w, "\n")
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return err
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}
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func writeRequiredFlag(cmd *Command, w io.Writer) error {
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if _, err := fmt.Fprintf(w, " must_have_one_flag=()\n"); err != nil {
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return err
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}
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flags := cmd.NonInheritedFlags()
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var visitErr error
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flags.VisitAll(func(flag *pflag.Flag) {
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if nonCompletableFlag(flag) {
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return
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}
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for key := range flag.Annotations {
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switch key {
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case BashCompOneRequiredFlag:
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format := " must_have_one_flag+=(\"--%s"
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b := (flag.Value.Type() == "bool")
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if !b {
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format += "="
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}
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format += "\")\n"
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if _, err := fmt.Fprintf(w, format, flag.Name); err != nil {
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visitErr = err
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return
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}
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if len(flag.Shorthand) > 0 {
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if _, err := fmt.Fprintf(w, " must_have_one_flag+=(\"-%s\")\n", flag.Shorthand); err != nil {
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visitErr = err
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return
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}
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}
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}
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}
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})
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return visitErr
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}
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func writeRequiredNouns(cmd *Command, w io.Writer) error {
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if _, err := fmt.Fprintf(w, " must_have_one_noun=()\n"); err != nil {
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return err
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}
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sort.Sort(sort.StringSlice(cmd.ValidArgs))
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for _, value := range cmd.ValidArgs {
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if _, err := fmt.Fprintf(w, " must_have_one_noun+=(%q)\n", value); err != nil {
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return err
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}
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}
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return nil
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}
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func writeArgAliases(cmd *Command, w io.Writer) error {
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if _, err := fmt.Fprintf(w, " noun_aliases=()\n"); err != nil {
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return err
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}
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sort.Sort(sort.StringSlice(cmd.ArgAliases))
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for _, value := range cmd.ArgAliases {
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if _, err := fmt.Fprintf(w, " noun_aliases+=(%q)\n", value); err != nil {
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return err
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}
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}
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return nil
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}
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func gen(cmd *Command, w io.Writer) error {
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for _, c := range cmd.Commands() {
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if !c.IsAvailableCommand() || c == cmd.helpCommand {
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continue
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}
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if err := gen(c, w); err != nil {
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return err
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}
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}
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commandName := cmd.CommandPath()
|
|
commandName = strings.Replace(commandName, " ", "_", -1)
|
|
commandName = strings.Replace(commandName, ":", "__", -1)
|
|
if _, err := fmt.Fprintf(w, "_%s()\n{\n", commandName); err != nil {
|
|
return err
|
|
}
|
|
if _, err := fmt.Fprintf(w, " last_command=%q\n", commandName); err != nil {
|
|
return err
|
|
}
|
|
if err := writeCommands(cmd, w); err != nil {
|
|
return err
|
|
}
|
|
if err := writeFlags(cmd, w); err != nil {
|
|
return err
|
|
}
|
|
if err := writeRequiredFlag(cmd, w); err != nil {
|
|
return err
|
|
}
|
|
if err := writeRequiredNouns(cmd, w); err != nil {
|
|
return err
|
|
}
|
|
if err := writeArgAliases(cmd, w); err != nil {
|
|
return err
|
|
}
|
|
if _, err := fmt.Fprintf(w, "}\n\n"); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// GenBashCompletion generates bash completion file and writes to the passed writer.
|
|
func (cmd *Command) GenBashCompletion(w io.Writer) error {
|
|
if err := preamble(w, cmd.Name()); err != nil {
|
|
return err
|
|
}
|
|
if len(cmd.BashCompletionFunction) > 0 {
|
|
if _, err := fmt.Fprintf(w, "%s\n", cmd.BashCompletionFunction); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if err := gen(cmd, w); err != nil {
|
|
return err
|
|
}
|
|
return postscript(w, cmd.Name())
|
|
}
|
|
|
|
func nonCompletableFlag(flag *pflag.Flag) bool {
|
|
return flag.Hidden || len(flag.Deprecated) > 0
|
|
}
|
|
|
|
// GenBashCompletionFile generates bash completion file.
|
|
func (cmd *Command) GenBashCompletionFile(filename string) error {
|
|
outFile, err := os.Create(filename)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer outFile.Close()
|
|
|
|
return cmd.GenBashCompletion(outFile)
|
|
}
|
|
|
|
// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag, if it exists.
|
|
func (cmd *Command) MarkFlagRequired(name string) error {
|
|
return MarkFlagRequired(cmd.Flags(), name)
|
|
}
|
|
|
|
// MarkPersistentFlagRequired adds the BashCompOneRequiredFlag annotation to the named persistent flag, if it exists.
|
|
func (cmd *Command) MarkPersistentFlagRequired(name string) error {
|
|
return MarkFlagRequired(cmd.PersistentFlags(), name)
|
|
}
|
|
|
|
// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag in the flag set, if it exists.
|
|
func MarkFlagRequired(flags *pflag.FlagSet, name string) error {
|
|
return flags.SetAnnotation(name, BashCompOneRequiredFlag, []string{"true"})
|
|
}
|
|
|
|
// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag, if it exists.
|
|
// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
|
|
func (cmd *Command) MarkFlagFilename(name string, extensions ...string) error {
|
|
return MarkFlagFilename(cmd.Flags(), name, extensions...)
|
|
}
|
|
|
|
// MarkFlagCustom adds the BashCompCustom annotation to the named flag, if it exists.
|
|
// Generated bash autocompletion will call the bash function f for the flag.
|
|
func (cmd *Command) MarkFlagCustom(name string, f string) error {
|
|
return MarkFlagCustom(cmd.Flags(), name, f)
|
|
}
|
|
|
|
// MarkPersistentFlagFilename adds the BashCompFilenameExt annotation to the named persistent flag, if it exists.
|
|
// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
|
|
func (cmd *Command) MarkPersistentFlagFilename(name string, extensions ...string) error {
|
|
return MarkFlagFilename(cmd.PersistentFlags(), name, extensions...)
|
|
}
|
|
|
|
// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag in the flag set, if it exists.
|
|
// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
|
|
func MarkFlagFilename(flags *pflag.FlagSet, name string, extensions ...string) error {
|
|
return flags.SetAnnotation(name, BashCompFilenameExt, extensions)
|
|
}
|
|
|
|
// MarkFlagCustom adds the BashCompCustom annotation to the named flag in the flag set, if it exists.
|
|
// Generated bash autocompletion will call the bash function f for the flag.
|
|
func MarkFlagCustom(flags *pflag.FlagSet, name string, f string) error {
|
|
return flags.SetAnnotation(name, BashCompCustom, []string{f})
|
|
}
|