Leverage existing bash completion

This is a PoC implementation for leveraging existing bash completion

git **<tab>
kubectl **<tab>

shell/completion.bash

@@ -283,7 +283,7 @@ _fzf_handle_dynamic_completion() {
 }
 
 __fzf_generic_path_completion() {
- local cur base dir leftover matches trigger cmd
+ local cur base dir leftover matches trigger cmd rest
  cmd="${COMP_WORDS[0]}"
  if [[ $cmd == \\* ]]; then
  cmd="${cmd:1}"
@@ -295,6 +295,16 @@ __fzf_generic_path_completion() {
  base=${cur:0:${#cur}-${#trigger}}
  eval "base=$base" 2> /dev/null || return
 
+ # Try to leverage existing completion
+ rest=("${@:4}")
+ unset 'rest[${#rest[@]}-2]'
+ COMP_LINE=${COMP_LINE:0:${#COMP_LINE}-${#trigger}}
+ COMP_POINT=$((COMP_POINT-${#trigger}))
+ COMP_WORDS[$COMP_CWORD]=$base
+ _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
+ [[ $? -ne 0 ]] &&
+ _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
+
  dir=
  [[ $base = *"/"* ]] && dir="$base"
  while true; do
@@ -306,7 +316,11 @@ __fzf_generic_path_completion() {
  matches=$(
  export FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --scheme=path" "${FZF_COMPLETION_OPTS-} $2")
  unset FZF_DEFAULT_COMMAND FZF_DEFAULT_OPTS_FILE
- if declare -F "$1" > /dev/null; then
+ if [[ ${#COMPREPLY[@]} -gt 0 ]]; then
+ for h in "${COMPREPLY[@]}"; do
+ echo "$h"
+ done | command sort -u | __fzf_comprun "$4" -q "$leftover"
+ elif declare -F "$1" > /dev/null; then
  eval "$1 $(printf %q "$dir")" | __fzf_comprun "$4" -q "$leftover"
  else
  if [[ $1 =~ dir ]]; then
@@ -374,7 +388,20 @@ _fzf_complete() {
  if [[ "$cur" == *"$trigger" ]] && [[ $cur != *'$('* ]] && [[ $cur != *':='* ]] && [[ $cur != *'`'* ]]; then
  cur=${cur:0:${#cur}-${#trigger}}
 
+ # Try to leverage existing completion
+ COMP_LINE=${COMP_LINE:0:${#COMP_LINE}-${#trigger}}
+ COMP_POINT=$((COMP_POINT-${#trigger}))
+ unset 'rest[${#rest[@]}-2]'
+ _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
+ [[ $? -ne 0 ]] &&
+ _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
+
  selected=$(
+ (if [[ ${#COMPREPLY[@]} -gt 0 ]]; then
+ for h in "${COMPREPLY[@]}"; do
+ echo "$h"
+ done
+ fi; cat) | command sort -u |
  FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse" "${FZF_COMPLETION_OPTS-} $str_arg") \
  FZF_DEFAULT_OPTS_FILE='' \
  __fzf_comprun "${rest[0]}" "${args[@]}" -q "$cur" | $post | command tr '\n' ' ')