dex/vendor/github.com/spf13/cobra/bash_completions.go

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package cobra
import (
"bytes"
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"fmt"
"io"
"os"
"sort"
"strings"
"github.com/spf13/pflag"
)
// Annotations for Bash completion.
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const (
BashCompFilenameExt = "cobra_annotation_bash_completion_filename_extensions"
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BashCompCustom = "cobra_annotation_bash_completion_custom"
BashCompOneRequiredFlag = "cobra_annotation_bash_completion_one_required_flag"
BashCompSubdirsInDir = "cobra_annotation_bash_completion_subdirs_in_dir"
)
func writePreamble(buf *bytes.Buffer, name string) {
buf.WriteString(fmt.Sprintf("# bash completion for %-36s -*- shell-script -*-\n", name))
buf.WriteString(fmt.Sprintf(`
__%[1]s_debug()
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{
if [[ -n ${BASH_COMP_DEBUG_FILE} ]]; then
echo "$*" >> "${BASH_COMP_DEBUG_FILE}"
fi
}
# Homebrew on Macs have version 1.3 of bash-completion which doesn't include
# _init_completion. This is a very minimal version of that function.
__%[1]s_init_completion()
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{
COMPREPLY=()
_get_comp_words_by_ref "$@" cur prev words cword
}
__%[1]s_index_of_word()
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{
local w word=$1
shift
index=0
for w in "$@"; do
[[ $w = "$word" ]] && return
index=$((index+1))
done
index=-1
}
__%[1]s_contains_word()
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{
local w word=$1; shift
for w in "$@"; do
[[ $w = "$word" ]] && return
done
return 1
}
__%[1]s_handle_reply()
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{
__%[1]s_debug "${FUNCNAME[0]}"
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case $cur in
-*)
if [[ $(type -t compopt) = "builtin" ]]; then
compopt -o nospace
fi
local allflags
if [ ${#must_have_one_flag[@]} -ne 0 ]; then
allflags=("${must_have_one_flag[@]}")
else
allflags=("${flags[*]} ${two_word_flags[*]}")
fi
COMPREPLY=( $(compgen -W "${allflags[*]}" -- "$cur") )
if [[ $(type -t compopt) = "builtin" ]]; then
[[ "${COMPREPLY[0]}" == *= ]] || compopt +o nospace
fi
# complete after --flag=abc
if [[ $cur == *=* ]]; then
if [[ $(type -t compopt) = "builtin" ]]; then
compopt +o nospace
fi
local index flag
flag="${cur%%=*}"
__%[1]s_index_of_word "${flag}" "${flags_with_completion[@]}"
COMPREPLY=()
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if [[ ${index} -ge 0 ]]; then
PREFIX=""
cur="${cur#*=}"
${flags_completion[${index}]}
if [ -n "${ZSH_VERSION}" ]; then
# zsh completion needs --flag= prefix
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eval "COMPREPLY=( \"\${COMPREPLY[@]/#/${flag}=}\" )"
fi
fi
fi
return 0;
;;
esac
# check if we are handling a flag with special work handling
local index
__%[1]s_index_of_word "${prev}" "${flags_with_completion[@]}"
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if [[ ${index} -ge 0 ]]; then
${flags_completion[${index}]}
return
fi
# we are parsing a flag and don't have a special handler, no completion
if [[ ${cur} != "${words[cword]}" ]]; then
return
fi
local completions
completions=("${commands[@]}")
if [[ ${#must_have_one_noun[@]} -ne 0 ]]; then
completions=("${must_have_one_noun[@]}")
fi
if [[ ${#must_have_one_flag[@]} -ne 0 ]]; then
completions+=("${must_have_one_flag[@]}")
fi
COMPREPLY=( $(compgen -W "${completions[*]}" -- "$cur") )
if [[ ${#COMPREPLY[@]} -eq 0 && ${#noun_aliases[@]} -gt 0 && ${#must_have_one_noun[@]} -ne 0 ]]; then
COMPREPLY=( $(compgen -W "${noun_aliases[*]}" -- "$cur") )
fi
if [[ ${#COMPREPLY[@]} -eq 0 ]]; then
if declare -F __%[1]s_custom_func >/dev/null; then
# try command name qualified custom func
__%[1]s_custom_func
else
# otherwise fall back to unqualified for compatibility
declare -F __custom_func >/dev/null && __custom_func
fi
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fi
# available in bash-completion >= 2, not always present on macOS
if declare -F __ltrim_colon_completions >/dev/null; then
__ltrim_colon_completions "$cur"
fi
# If there is only 1 completion and it is a flag with an = it will be completed
# but we don't want a space after the =
if [[ "${#COMPREPLY[@]}" -eq "1" ]] && [[ $(type -t compopt) = "builtin" ]] && [[ "${COMPREPLY[0]}" == --*= ]]; then
compopt -o nospace
fi
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}
# The arguments should be in the form "ext1|ext2|extn"
__%[1]s_handle_filename_extension_flag()
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{
local ext="$1"
_filedir "@(${ext})"
}
__%[1]s_handle_subdirs_in_dir_flag()
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{
local dir="$1"
pushd "${dir}" >/dev/null 2>&1 && _filedir -d && popd >/dev/null 2>&1
}
__%[1]s_handle_flag()
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{
__%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
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# if a command required a flag, and we found it, unset must_have_one_flag()
local flagname=${words[c]}
local flagvalue
# if the word contained an =
if [[ ${words[c]} == *"="* ]]; then
flagvalue=${flagname#*=} # take in as flagvalue after the =
flagname=${flagname%%=*} # strip everything after the =
flagname="${flagname}=" # but put the = back
fi
__%[1]s_debug "${FUNCNAME[0]}: looking for ${flagname}"
if __%[1]s_contains_word "${flagname}" "${must_have_one_flag[@]}"; then
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must_have_one_flag=()
fi
# if you set a flag which only applies to this command, don't show subcommands
if __%[1]s_contains_word "${flagname}" "${local_nonpersistent_flags[@]}"; then
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commands=()
fi
# keep flag value with flagname as flaghash
# flaghash variable is an associative array which is only supported in bash > 3.
if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then
if [ -n "${flagvalue}" ] ; then
flaghash[${flagname}]=${flagvalue}
elif [ -n "${words[ $((c+1)) ]}" ] ; then
flaghash[${flagname}]=${words[ $((c+1)) ]}
else
flaghash[${flagname}]="true" # pad "true" for bool flag
fi
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fi
# skip the argument to a two word flag
if [[ ${words[c]} != *"="* ]] && __%[1]s_contains_word "${words[c]}" "${two_word_flags[@]}"; then
__%[1]s_debug "${FUNCNAME[0]}: found a flag ${words[c]}, skip the next argument"
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c=$((c+1))
# if we are looking for a flags value, don't show commands
if [[ $c -eq $cword ]]; then
commands=()
fi
fi
c=$((c+1))
}
__%[1]s_handle_noun()
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{
__%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
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if __%[1]s_contains_word "${words[c]}" "${must_have_one_noun[@]}"; then
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must_have_one_noun=()
elif __%[1]s_contains_word "${words[c]}" "${noun_aliases[@]}"; then
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must_have_one_noun=()
fi
nouns+=("${words[c]}")
c=$((c+1))
}
__%[1]s_handle_command()
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{
__%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
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local next_command
if [[ -n ${last_command} ]]; then
next_command="_${last_command}_${words[c]//:/__}"
else
if [[ $c -eq 0 ]]; then
next_command="_%[1]s_root_command"
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else
next_command="_${words[c]//:/__}"
fi
fi
c=$((c+1))
__%[1]s_debug "${FUNCNAME[0]}: looking for ${next_command}"
declare -F "$next_command" >/dev/null && $next_command
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}
__%[1]s_handle_word()
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{
if [[ $c -ge $cword ]]; then
__%[1]s_handle_reply
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return
fi
__%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
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if [[ "${words[c]}" == -* ]]; then
__%[1]s_handle_flag
elif __%[1]s_contains_word "${words[c]}" "${commands[@]}"; then
__%[1]s_handle_command
elif [[ $c -eq 0 ]]; then
__%[1]s_handle_command
elif __%[1]s_contains_word "${words[c]}" "${command_aliases[@]}"; then
# aliashash variable is an associative array which is only supported in bash > 3.
if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then
words[c]=${aliashash[${words[c]}]}
__%[1]s_handle_command
else
__%[1]s_handle_noun
fi
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else
__%[1]s_handle_noun
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fi
__%[1]s_handle_word
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}
`, name))
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}
func writePostscript(buf *bytes.Buffer, name string) {
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name = strings.Replace(name, ":", "__", -1)
buf.WriteString(fmt.Sprintf("__start_%s()\n", name))
buf.WriteString(fmt.Sprintf(`{
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local cur prev words cword
declare -A flaghash 2>/dev/null || :
declare -A aliashash 2>/dev/null || :
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if declare -F _init_completion >/dev/null 2>&1; then
_init_completion -s || return
else
__%[1]s_init_completion -n "=" || return
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fi
local c=0
local flags=()
local two_word_flags=()
local local_nonpersistent_flags=()
local flags_with_completion=()
local flags_completion=()
local commands=("%[1]s")
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local must_have_one_flag=()
local must_have_one_noun=()
local last_command
local nouns=()
__%[1]s_handle_word
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}
`, name))
buf.WriteString(fmt.Sprintf(`if [[ $(type -t compopt) = "builtin" ]]; then
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complete -o default -F __start_%s %s
else
complete -o default -o nospace -F __start_%s %s
fi
`, name, name, name, name))
buf.WriteString("# ex: ts=4 sw=4 et filetype=sh\n")
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}
func writeCommands(buf *bytes.Buffer, cmd *Command) {
buf.WriteString(" commands=()\n")
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for _, c := range cmd.Commands() {
if !c.IsAvailableCommand() || c == cmd.helpCommand {
continue
}
buf.WriteString(fmt.Sprintf(" commands+=(%q)\n", c.Name()))
writeCmdAliases(buf, c)
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}
buf.WriteString("\n")
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}
func writeFlagHandler(buf *bytes.Buffer, name string, annotations map[string][]string, cmd *Command) {
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for key, value := range annotations {
switch key {
case BashCompFilenameExt:
buf.WriteString(fmt.Sprintf(" flags_with_completion+=(%q)\n", name))
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var ext string
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if len(value) > 0 {
ext = fmt.Sprintf("__%s_handle_filename_extension_flag ", cmd.Root().Name()) + strings.Join(value, "|")
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} else {
ext = "_filedir"
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}
buf.WriteString(fmt.Sprintf(" flags_completion+=(%q)\n", ext))
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case BashCompCustom:
buf.WriteString(fmt.Sprintf(" flags_with_completion+=(%q)\n", name))
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if len(value) > 0 {
handlers := strings.Join(value, "; ")
buf.WriteString(fmt.Sprintf(" flags_completion+=(%q)\n", handlers))
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} else {
buf.WriteString(" flags_completion+=(:)\n")
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}
case BashCompSubdirsInDir:
buf.WriteString(fmt.Sprintf(" flags_with_completion+=(%q)\n", name))
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var ext string
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if len(value) == 1 {
ext = fmt.Sprintf("__%s_handle_subdirs_in_dir_flag ", cmd.Root().Name()) + value[0]
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} else {
ext = "_filedir -d"
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}
buf.WriteString(fmt.Sprintf(" flags_completion+=(%q)\n", ext))
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}
}
}
func writeShortFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
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name := flag.Shorthand
format := " "
if len(flag.NoOptDefVal) == 0 {
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format += "two_word_"
}
format += "flags+=(\"-%s\")\n"
buf.WriteString(fmt.Sprintf(format, name))
writeFlagHandler(buf, "-"+name, flag.Annotations, cmd)
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}
func writeFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
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name := flag.Name
format := " flags+=(\"--%s"
if len(flag.NoOptDefVal) == 0 {
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format += "="
}
format += "\")\n"
buf.WriteString(fmt.Sprintf(format, name))
if len(flag.NoOptDefVal) == 0 {
format = " two_word_flags+=(\"--%s\")\n"
buf.WriteString(fmt.Sprintf(format, name))
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}
writeFlagHandler(buf, "--"+name, flag.Annotations, cmd)
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}
func writeLocalNonPersistentFlag(buf *bytes.Buffer, flag *pflag.Flag) {
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name := flag.Name
format := " local_nonpersistent_flags+=(\"--%s"
if len(flag.NoOptDefVal) == 0 {
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format += "="
}
format += "\")\n"
buf.WriteString(fmt.Sprintf(format, name))
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}
func writeFlags(buf *bytes.Buffer, cmd *Command) {
buf.WriteString(` flags=()
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two_word_flags=()
local_nonpersistent_flags=()
flags_with_completion=()
flags_completion=()
`)
localNonPersistentFlags := cmd.LocalNonPersistentFlags()
cmd.NonInheritedFlags().VisitAll(func(flag *pflag.Flag) {
if nonCompletableFlag(flag) {
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return
}
writeFlag(buf, flag, cmd)
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if len(flag.Shorthand) > 0 {
writeShortFlag(buf, flag, cmd)
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}
if localNonPersistentFlags.Lookup(flag.Name) != nil {
writeLocalNonPersistentFlag(buf, flag)
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}
})
cmd.InheritedFlags().VisitAll(func(flag *pflag.Flag) {
if nonCompletableFlag(flag) {
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return
}
writeFlag(buf, flag, cmd)
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if len(flag.Shorthand) > 0 {
writeShortFlag(buf, flag, cmd)
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}
})
buf.WriteString("\n")
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}
func writeRequiredFlag(buf *bytes.Buffer, cmd *Command) {
buf.WriteString(" must_have_one_flag=()\n")
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flags := cmd.NonInheritedFlags()
flags.VisitAll(func(flag *pflag.Flag) {
if nonCompletableFlag(flag) {
return
}
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for key := range flag.Annotations {
switch key {
case BashCompOneRequiredFlag:
format := " must_have_one_flag+=(\"--%s"
if flag.Value.Type() != "bool" {
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format += "="
}
format += "\")\n"
buf.WriteString(fmt.Sprintf(format, flag.Name))
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if len(flag.Shorthand) > 0 {
buf.WriteString(fmt.Sprintf(" must_have_one_flag+=(\"-%s\")\n", flag.Shorthand))
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}
}
}
})
}
func writeRequiredNouns(buf *bytes.Buffer, cmd *Command) {
buf.WriteString(" must_have_one_noun=()\n")
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sort.Sort(sort.StringSlice(cmd.ValidArgs))
for _, value := range cmd.ValidArgs {
buf.WriteString(fmt.Sprintf(" must_have_one_noun+=(%q)\n", value))
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}
}
func writeCmdAliases(buf *bytes.Buffer, cmd *Command) {
if len(cmd.Aliases) == 0 {
return
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}
sort.Sort(sort.StringSlice(cmd.Aliases))
buf.WriteString(fmt.Sprint(` if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then`, "\n"))
for _, value := range cmd.Aliases {
buf.WriteString(fmt.Sprintf(" command_aliases+=(%q)\n", value))
buf.WriteString(fmt.Sprintf(" aliashash[%q]=%q\n", value, cmd.Name()))
}
buf.WriteString(` fi`)
buf.WriteString("\n")
}
func writeArgAliases(buf *bytes.Buffer, cmd *Command) {
buf.WriteString(" noun_aliases=()\n")
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sort.Sort(sort.StringSlice(cmd.ArgAliases))
for _, value := range cmd.ArgAliases {
buf.WriteString(fmt.Sprintf(" noun_aliases+=(%q)\n", value))
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}
}
func gen(buf *bytes.Buffer, cmd *Command) {
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for _, c := range cmd.Commands() {
if !c.IsAvailableCommand() || c == cmd.helpCommand {
continue
}
gen(buf, c)
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}
commandName := cmd.CommandPath()
commandName = strings.Replace(commandName, " ", "_", -1)
commandName = strings.Replace(commandName, ":", "__", -1)
if cmd.Root() == cmd {
buf.WriteString(fmt.Sprintf("_%s_root_command()\n{\n", commandName))
} else {
buf.WriteString(fmt.Sprintf("_%s()\n{\n", commandName))
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}
buf.WriteString(fmt.Sprintf(" last_command=%q\n", commandName))
buf.WriteString("\n")
buf.WriteString(" command_aliases=()\n")
buf.WriteString("\n")
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writeCommands(buf, cmd)
writeFlags(buf, cmd)
writeRequiredFlag(buf, cmd)
writeRequiredNouns(buf, cmd)
writeArgAliases(buf, cmd)
buf.WriteString("}\n\n")
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}
// GenBashCompletion generates bash completion file and writes to the passed writer.
func (c *Command) GenBashCompletion(w io.Writer) error {
buf := new(bytes.Buffer)
writePreamble(buf, c.Name())
if len(c.BashCompletionFunction) > 0 {
buf.WriteString(c.BashCompletionFunction + "\n")
}
gen(buf, c)
writePostscript(buf, c.Name())
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_, err := buf.WriteTo(w)
return err
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}
func nonCompletableFlag(flag *pflag.Flag) bool {
return flag.Hidden || len(flag.Deprecated) > 0
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}
// GenBashCompletionFile generates bash completion file.
func (c *Command) GenBashCompletionFile(filename string) error {
outFile, err := os.Create(filename)
if err != nil {
return err
}
defer outFile.Close()
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return c.GenBashCompletion(outFile)
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}