Add support for blesh (#267)

* Fix intendation

* Add support for blesh

See https://github.com/akinomyoga/ble.sh/wiki/Manual-%C2%A71-Introduction#user-content-fn-blehook for more details

src/shell/atuin.bash

@@ -2,34 +2,38 @@ ATUIN_SESSION=$(atuin uuid)
 export ATUIN_SESSION
 
 _atuin_preexec() {
-	id=$(atuin history start "$1")
-	export ATUIN_HISTORY_ID="$id"
+    id=$(atuin history start "$1")
+    export ATUIN_HISTORY_ID="$id"
 }
 
 _atuin_precmd() {
-	local EXIT="$?"
+    local EXIT="$?"
 
-	[[ -z "${ATUIN_HISTORY_ID}" ]] && return
+    [[ -z "${ATUIN_HISTORY_ID}" ]] && return
 
-
-	(RUST_LOG=error atuin history end "$ATUIN_HISTORY_ID" --exit $EXIT &) > /dev/null 2>&1
+    (RUST_LOG=error atuin history end "$ATUIN_HISTORY_ID" --exit $EXIT &) > /dev/null 2>&1
 }
 
 
 __atuin_history ()
 {
-	tput rmkx
+    tput rmkx
     HISTORY="$(RUST_LOG=error atuin search -i "$BUFFER" 3>&1 1>&2 2>&3)"
-	tput smkx
+    tput smkx
 
     READLINE_LINE=${HISTORY}
     READLINE_POINT=${#READLINE_LINE}
 }
 
 
-preexec_functions+=(_atuin_preexec)
-precmd_functions+=(_atuin_precmd)
+if [[ -v BLE_VERSION ]]; then
+    blehook PRECMD+=_atuin_precmd
+    blehook PREEXEC+=_atuin_preexec
+else
+    precmd_functions+=(_atuin_precmd)
+    preexec_functions+=(_atuin_preexec)
+fi
 
 if [[ -z $ATUIN_NOBIND ]]; then
-	bind -x '"\C-r": __atuin_history'
+    bind -x '"\C-r": __atuin_history'
 fi