mirror of
https://github.com/spf13/cobra
synced 2024-06-28 22:59:07 +00:00
0fc734c3c5
We do this so we get stable repeatable output and can see if updates are necessary or if it is just golang doing the same thing twice differently
346 lines
8 KiB
Go
346 lines
8 KiB
Go
package cobra
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"os"
|
|
"sort"
|
|
"strings"
|
|
|
|
"github.com/spf13/pflag"
|
|
)
|
|
|
|
const (
|
|
BashCompFilenameExt = "cobra_annotation_bash_completion_filename_extentions"
|
|
BashCompOneRequiredFlag = "cobra_annotation_bash_completion_one_required_flag"
|
|
)
|
|
|
|
func preamble(out *bytes.Buffer) {
|
|
fmt.Fprintf(out, `#!/bin/bash
|
|
|
|
|
|
__debug()
|
|
{
|
|
if [[ -n ${BASH_COMP_DEBUG_FILE} ]]; then
|
|
echo "$*" >> ${BASH_COMP_DEBUG_FILE}
|
|
fi
|
|
}
|
|
|
|
__index_of_word()
|
|
{
|
|
local w word=$1
|
|
shift
|
|
index=0
|
|
for w in "$@"; do
|
|
[[ $w = "$word" ]] && return
|
|
index=$((index+1))
|
|
done
|
|
index=-1
|
|
}
|
|
|
|
__contains_word()
|
|
{
|
|
local w word=$1; shift
|
|
for w in "$@"; do
|
|
[[ $w = "$word" ]] && return
|
|
done
|
|
return 1
|
|
}
|
|
|
|
__handle_reply()
|
|
{
|
|
__debug "${FUNCNAME}"
|
|
case $cur in
|
|
-*)
|
|
compopt -o nospace
|
|
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") )
|
|
[[ $COMPREPLY == *= ]] || compopt +o nospace
|
|
return 0;
|
|
;;
|
|
esac
|
|
|
|
# check if we are handling a flag with special work handling
|
|
local index
|
|
__index_of_word "${prev}" "${flags_with_completion[@]}"
|
|
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
|
|
if [[ ${#must_have_one_flag[@]} -ne 0 ]]; then
|
|
completions=("${must_have_one_flag[@]}")
|
|
elif [[ ${#must_have_one_noun[@]} -ne 0 ]]; then
|
|
completions=("${must_have_one_noun[@]}")
|
|
else
|
|
completions=("${commands[@]}")
|
|
fi
|
|
COMPREPLY=( $(compgen -W "${completions[*]}" -- "$cur") )
|
|
|
|
if [[ ${#COMPREPLY[@]} -eq 0 ]]; then
|
|
declare -F __custom_func >/dev/null && __custom_func
|
|
fi
|
|
}
|
|
|
|
__handle_flag()
|
|
{
|
|
__debug "${FUNCNAME}: c is $c words[c] is ${words[c]}"
|
|
|
|
# if a command required a flag, and we found it, unset must_have_one_flag()
|
|
local flagname=${words[c]}
|
|
# if the word contained an =
|
|
if [[ ${words[c]} == *"="* ]]; then
|
|
flagname=${flagname%%=*} # strip everything after the =
|
|
flagname="${flagname}=" # but put the = back
|
|
fi
|
|
__debug "${FUNCNAME}: looking for ${flagname}"
|
|
if __contains_word "${flagname}" "${must_have_one_flag[@]}"; then
|
|
must_have_one_flag=()
|
|
fi
|
|
|
|
# skip the argument to a two word flag
|
|
if __contains_word "${words[c]}" "${two_word_flags[@]}"; then
|
|
c=$((c+1))
|
|
# if we are looking for a flags value, don't show commands
|
|
if [[ $c -eq $cword ]]; then
|
|
commands=()
|
|
fi
|
|
fi
|
|
|
|
# skip the flag itself
|
|
c=$((c+1))
|
|
|
|
}
|
|
|
|
__handle_noun()
|
|
{
|
|
__debug "${FUNCNAME}: c is $c words[c] is ${words[c]}"
|
|
|
|
if __contains_word "${words[c]}" "${must_have_one_noun[@]}"; then
|
|
must_have_one_noun=()
|
|
fi
|
|
|
|
nouns+=("${words[c]}")
|
|
c=$((c+1))
|
|
}
|
|
|
|
__handle_command()
|
|
{
|
|
__debug "${FUNCNAME}: c is $c words[c] is ${words[c]}"
|
|
|
|
local next_command
|
|
if [[ -n ${last_command} ]]; then
|
|
next_command="_${last_command}_${words[c]}"
|
|
else
|
|
next_command="_${words[c]}"
|
|
fi
|
|
c=$((c+1))
|
|
__debug "${FUNCNAME}: looking for ${next_command}"
|
|
declare -F $next_command >/dev/null && $next_command
|
|
}
|
|
|
|
__handle_word()
|
|
{
|
|
if [[ $c -ge $cword ]]; then
|
|
__handle_reply
|
|
return
|
|
fi
|
|
__debug "${FUNCNAME}: c is $c words[c] is ${words[c]}"
|
|
if [[ "${words[c]}" == -* ]]; then
|
|
__handle_flag
|
|
elif __contains_word "${words[c]}" "${commands[@]}"; then
|
|
__handle_command
|
|
else
|
|
__handle_noun
|
|
fi
|
|
__handle_word
|
|
}
|
|
|
|
`)
|
|
}
|
|
|
|
func postscript(out *bytes.Buffer, name string) {
|
|
fmt.Fprintf(out, "__start_%s()\n", name)
|
|
fmt.Fprintf(out, `{
|
|
local cur prev words cword split
|
|
_init_completion -s || return
|
|
|
|
local completions_func
|
|
local c=0
|
|
local flags=()
|
|
local two_word_flags=()
|
|
local flags_with_completion=()
|
|
local flags_completion=()
|
|
local commands=("%s")
|
|
local must_have_one_flag=()
|
|
local must_have_one_noun=()
|
|
local last_command
|
|
local nouns=()
|
|
|
|
__handle_word
|
|
}
|
|
|
|
`, name)
|
|
fmt.Fprintf(out, "complete -F __start_%s %s\n", name, name)
|
|
fmt.Fprintf(out, "# ex: ts=4 sw=4 et filetype=sh\n")
|
|
}
|
|
|
|
func writeCommands(cmd *Command, out *bytes.Buffer) {
|
|
fmt.Fprintf(out, " commands=()\n")
|
|
for _, c := range cmd.Commands() {
|
|
fmt.Fprintf(out, " commands+=(%q)\n", c.Name())
|
|
}
|
|
fmt.Fprintf(out, "\n")
|
|
}
|
|
|
|
func writeFlagHandler(name string, annotations map[string][]string, out *bytes.Buffer) {
|
|
for key, value := range annotations {
|
|
switch key {
|
|
case BashCompFilenameExt:
|
|
fmt.Fprintf(out, " flags_with_completion+=(%q)\n", name)
|
|
|
|
ext := strings.Join(value, "|")
|
|
ext = "_filedir '@(" + ext + ")'"
|
|
fmt.Fprintf(out, " flags_completion+=(%q)\n", ext)
|
|
}
|
|
}
|
|
}
|
|
|
|
func writeShortFlag(flag *pflag.Flag, out *bytes.Buffer) {
|
|
b := (flag.Value.Type() == "bool")
|
|
name := flag.Shorthand
|
|
format := " "
|
|
if !b {
|
|
format += "two_word_"
|
|
}
|
|
format += "flags+=(\"-%s\")\n"
|
|
fmt.Fprintf(out, format, name)
|
|
writeFlagHandler("-"+name, flag.Annotations, out)
|
|
}
|
|
|
|
func writeFlag(flag *pflag.Flag, out *bytes.Buffer) {
|
|
b := (flag.Value.Type() == "bool")
|
|
name := flag.Name
|
|
format := " flags+=(\"--%s"
|
|
if !b {
|
|
format += "="
|
|
}
|
|
format += "\")\n"
|
|
fmt.Fprintf(out, format, name)
|
|
writeFlagHandler("--"+name, flag.Annotations, out)
|
|
}
|
|
|
|
func writeFlags(cmd *Command, out *bytes.Buffer) {
|
|
fmt.Fprintf(out, ` flags=()
|
|
two_word_flags=()
|
|
flags_with_completion=()
|
|
flags_completion=()
|
|
|
|
`)
|
|
cmd.NonInheritedFlags().VisitAll(func(flag *pflag.Flag) {
|
|
writeFlag(flag, out)
|
|
if len(flag.Shorthand) > 0 {
|
|
writeShortFlag(flag, out)
|
|
}
|
|
})
|
|
|
|
fmt.Fprintf(out, "\n")
|
|
}
|
|
|
|
func writeRequiredFlag(cmd *Command, out *bytes.Buffer) {
|
|
fmt.Fprintf(out, " must_have_one_flag=()\n")
|
|
flags := cmd.NonInheritedFlags()
|
|
flags.VisitAll(func(flag *pflag.Flag) {
|
|
for key, _ := range flag.Annotations {
|
|
switch key {
|
|
case BashCompOneRequiredFlag:
|
|
format := " must_have_one_flag+=(\"--%s"
|
|
b := (flag.Value.Type() == "bool")
|
|
if !b {
|
|
format += "="
|
|
}
|
|
format += "\")\n"
|
|
fmt.Fprintf(out, format, flag.Name)
|
|
|
|
if len(flag.Shorthand) > 0 {
|
|
fmt.Fprintf(out, " must_have_one_flag+=(\"-%s\")\n", flag.Shorthand)
|
|
}
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
func writeRequiredNoun(cmd *Command, out *bytes.Buffer) {
|
|
fmt.Fprintf(out, " must_have_one_noun=()\n")
|
|
sort.Sort(sort.StringSlice(cmd.ValidArgs))
|
|
for _, value := range cmd.ValidArgs {
|
|
fmt.Fprintf(out, " must_have_one_noun+=(%q)\n", value)
|
|
}
|
|
}
|
|
|
|
func gen(cmd *Command, out *bytes.Buffer) {
|
|
for _, c := range cmd.Commands() {
|
|
gen(c, out)
|
|
}
|
|
commandName := cmd.CommandPath()
|
|
commandName = strings.Replace(commandName, " ", "_", -1)
|
|
fmt.Fprintf(out, "_%s()\n{\n", commandName)
|
|
fmt.Fprintf(out, " last_command=%q\n", commandName)
|
|
writeCommands(cmd, out)
|
|
writeFlags(cmd, out)
|
|
writeRequiredFlag(cmd, out)
|
|
writeRequiredNoun(cmd, out)
|
|
fmt.Fprintf(out, "}\n\n")
|
|
}
|
|
|
|
func (cmd *Command) GenBashCompletion(out *bytes.Buffer) {
|
|
preamble(out)
|
|
if len(cmd.BashCompletionFunction) > 0 {
|
|
fmt.Fprintf(out, "%s\n", cmd.BashCompletionFunction)
|
|
}
|
|
gen(cmd, out)
|
|
postscript(out, cmd.Name())
|
|
}
|
|
|
|
func (cmd *Command) GenBashCompletionFile(filename string) error {
|
|
out := new(bytes.Buffer)
|
|
|
|
cmd.GenBashCompletion(out)
|
|
|
|
outFile, err := os.Create(filename)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer outFile.Close()
|
|
|
|
_, err = outFile.Write(out.Bytes())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (cmd *Command) MarkFlagRequired(name string) {
|
|
flag := cmd.Flags().Lookup(name)
|
|
if flag == nil {
|
|
return
|
|
}
|
|
if flag.Annotations == nil {
|
|
flag.Annotations = make(map[string][]string)
|
|
}
|
|
annotation := make([]string, 1)
|
|
annotation[0] = "true"
|
|
flag.Annotations[BashCompOneRequiredFlag] = annotation
|
|
}
|