Add bash line editor.

.local/share/blesh/contrib/integration/nix-completion.bash

@@ -0,0 +1,27 @@
+# ble/contrib/integration/nix-completion.bash (C) 2023, akinomyoga
+
+[[ $- == *i* ]] || return 0
+
+function ble/contrib/integration:nix-completion/_complete_nix.advice {
+  if [[ ${_ble_attached-} && " ${FUNCNAME[*]} " == *" ble/complete/progcomp/.compgen "* && ${COMP_WORDS[0]-} != *[\'\"\\]* ]]; then
+    local _ble_nix_cmd=${COMP_WORDS[0]-nix} ret
+    ble/function#push "$_ble_nix_cmd" '
+      local IFS=$_ble_term_IFS
+      local -a args; args=("$@")
+      ble/util/conditional-sync "exec $_ble_nix_cmd \"\${args[@]}\"" \
+        '\''! ble/complete/check-cancel'\'' 128 progressive-weight:killall'
+    ble/function#advice/do
+    ble/function#pop "$_ble_nix_cmd"
+  else
+    ble/function#advice/do
+    return 0
+  fi
+}
+
+function ble/contrib/integration:nix-completion/adjust {
+  if ble/is-function _complete_nix; then
+    ble/function#advice around _complete_nix ble/contrib/integration:nix-completion/_complete_nix.advice
+  fi
+}
+
+ble/contrib/integration:nix-completion/adjust