decode: fix non-working TAB completion in bash-4.4 and lower

ble.pp

@@ -132,15 +132,15 @@ function ble/base/restore-bash-options {
   ble/base/adjust-bash-options
 } &>/dev/null # set -x 対策 #D0930
 
-## @var _ble_edit_POSIXLY_CORRECT_adjusted
+## @var _ble_bash_POSIXLY_CORRECT_adjusted
 ##   現在 POSIXLY_CORRECT 状態を待避した状態かどうかを保持します。
-## @var _ble_edit_POSIXLY_CORRECT_set
+## @var _ble_bash_POSIXLY_CORRECT_set
 ##   待避した POSIXLY_CORRECT の設定・非設定状態を保持します。
-## @var _ble_edit_POSIXLY_CORRECT_set
+## @var _ble_bash_POSIXLY_CORRECT_set
 ##   待避した POSIXLY_CORRECT の値を保持します。
-_ble_edit_POSIXLY_CORRECT_adjusted=
-_ble_edit_POSIXLY_CORRECT_set=
-_ble_edit_POSIXLY_CORRECT=
+_ble_bash_POSIXLY_CORRECT_adjusted=
+_ble_bash_POSIXLY_CORRECT_set=
+_ble_bash_POSIXLY_CORRECT=
 function ble/base/workaround-POSIXLY_CORRECT {
   # This function will be overwritten by ble-decode
   true
@@ -152,29 +152,29 @@ function ble/base/unset-POSIXLY_CORRECT {
   fi
 }
 function ble/base/adjust-POSIXLY_CORRECT {
-  [[ $_ble_edit_POSIXLY_CORRECT_adjusted ]] && return
-  _ble_edit_POSIXLY_CORRECT_adjusted=1
-  _ble_edit_POSIXLY_CORRECT_set=${POSIXLY_CORRECT+set}
-  _ble_edit_POSIXLY_CORRECT=$POSIXLY_CORRECT
+  [[ $_ble_bash_POSIXLY_CORRECT_adjusted ]] && return
+  _ble_bash_POSIXLY_CORRECT_adjusted=1
+  _ble_bash_POSIXLY_CORRECT_set=${POSIXLY_CORRECT+set}
+  _ble_bash_POSIXLY_CORRECT=$POSIXLY_CORRECT
   unset -v POSIXLY_CORRECT
 
   # ユーザが触ったかもしれないので何れにしても workaround を呼び出す。
   ble/base/workaround-POSIXLY_CORRECT
 }
 function ble/base/restore-POSIXLY_CORRECT {
-  if [[ ! $_ble_edit_POSIXLY_CORRECT_adjusted ]]; then return; fi # Note: set -e の為 || は駄目
-  _ble_edit_POSIXLY_CORRECT_adjusted=
-  if [[ $_ble_edit_POSIXLY_CORRECT_set ]]; then
-    POSIXLY_CORRECT=$_ble_edit_POSIXLY_CORRECT
+  if [[ ! $_ble_bash_POSIXLY_CORRECT_adjusted ]]; then return; fi # Note: set -e の為 || は駄目
+  _ble_bash_POSIXLY_CORRECT_adjusted=
+  if [[ $_ble_bash_POSIXLY_CORRECT_set ]]; then
+    POSIXLY_CORRECT=$_ble_bash_POSIXLY_CORRECT
   else
     ble/base/unset-POSIXLY_CORRECT
   fi
 }
 ble/base/adjust-POSIXLY_CORRECT
 
 function ble/base/is-POSIXLY_CORRECT {
-  if [[ $_ble_edit_POSIXLY_CORRECT_adjusted ]]; then
-    [[ $_ble_edit_POSIXLY_CORRECT_set ]]
+  if [[ $_ble_bash_POSIXLY_CORRECT_adjusted ]]; then
+    [[ $_ble_bash_POSIXLY_CORRECT_set ]]
   else
     [[ ${POSIXLY_CORRECT+set} ]]
   fi

src/decode.sh

@@ -441,15 +441,25 @@ function ble-decode/.hook/erase-progress {
   fi
 }
 
+function ble-decode/.hook/adjust-volatile-options {
+  # Note: bind -x 内の set +v は揮発性なのでできるだけ先頭で set +v しておく。
+  # (PROLOGUE 内から呼ばれる) stdout.on より前であれば大丈夫 #D0930
+  if [[ $_ble_bash_options_adjusted ]]; then
+    set +ev
+  fi
+  if [[ $_ble_bash_POSIXLY_CORRECT_adjusted && ${POSIXLY_CORRECT+set} ]]; then
+    set +o posix
+    ble/base/workaround-POSIXLY_CORRECT
+  fi
+}
+
 function ble-decode/.hook {
   if ble/util/is-stdin-ready; then
     ble/array#push _ble_decode_input_buffer "$@"
     return
   fi
 
-  # Note: bind -x 内の set +v は揮発性なのでできるだけ先頭で set +v しておく。
-  # (PROLOGUE 内から呼ばれる) stdout.on より前であれば大丈夫 #D0930
-  [[ ! $_ble_bash_options_adjusted ]] || set +ev +o posix
+  ble-decode/.hook/adjust-volatile-options
 
   local IFS=$' \t\n'
   ble-decode/PROLOGUE