fix(bash): improve the support for enter_accept with ble.sh (#1465)

* feat(bash): check version of ble.sh

blehooks are only supported in ble.sh >= 0.4, so we require the ble.sh
version to be larger or equal to 0.4.  We also describe the version
requirement in README.md.

* fix(bash): use ble.sh's contrib/integration/bash-preexec

ble.sh provides module "contrib/integration/bash-preexec", which can
be used with the same interface as bash-preexec.  This module provides
"preexec_functions" and "precmd_functions" without requiring
bash-preexec.

This module also properly handles it when both ble.sh and bash-preexec
are loaded; the module resolves the conflicts between ble.sh and
bash-preexec, and the module also tries to support bash-preexec in the
detached state of ble.sh.

* fix(bash): use ble.sh's accept-line widget for enter_accept

In ble.sh, one can directly call the widget "accept-line" from a shell
script.  The widget "accept-line" is the actual widget that reserves
the command execution in ble.sh, so calling "accept-line" is
equivalent to the normal execution.  It includes all the necessary
adjustments and processing including stty and history.

In addition, the command will be executed at the top-level context
instead in a function scope.  For example, without ble.sh, running
"declare -A dict=()" through enter_accept will create an associative
array in the function scope unexpectedly.  With ble.sh, since the
command is executed at the top-level context, such a problem does not
happen.

When ble.sh is in a detached state, we fall back to the manual
execution of the command.  In this case, we cannot assume the
existence of the shell function "__bp_set_ret_value", so we always use
__atuin_set_ret_value.

README.md

@@ -274,14 +274,16 @@ antigen bundle atuinsh/atuin@main
 
 #### [ble.sh](https://github.com/akinomyoga/ble.sh)
 
-Atuin works best in bash when using [ble.sh](https://github.com/akinomyoga/ble.sh).
+Atuin works best in bash when using [ble.sh](https://github.com/akinomyoga/ble.sh) >= 0.4.
 
-With ble.sh installed, just add atuin to your .bashrc
+With ble.sh (>= 0.4) installed, just add atuin to your .bashrc
 
 ```bash
 echo 'eval "$(atuin init bash)"' >> ~/.bashrc
 ```
 
+Please make sure that the above line comes after sourcing ble.sh so atuin knows the presence of ble.sh.
+
 #### [bash-preexec](https://github.com/rcaloras/bash-preexec)
 
 [Bash-preexec](https://github.com/rcaloras/bash-preexec) can also be used, but you may experience some minor problems with the recorded duration and exit status of some commands.

atuin/src/shell/atuin.bash

@@ -28,17 +28,19 @@ __atuin_history() {
     if [[ $HISTORY == __atuin_accept__:* ]]
     then
       HISTORY=${HISTORY#__atuin_accept__:}
-      # Reprint the prompt, accounting for multiple lines
-      local __atuin_prompt_offset
-      __atuin_prompt_offset=$(echo -n "${PS1@P}" | tr -cd '\n' | wc -c)
-      if ((__atuin_prompt_offset > 0)); then
-        tput cuu "$__atuin_prompt_offset"
-      fi
-      echo "${PS1@P}$HISTORY"
 
-      if [[ -n "${BLE_VERSION-}" ]]; then
-        blehook/invoke PREEXEC "$HISTORY"
+      if [[ -n "${BLE_ATTACHED-}" ]]; then
+        ble-edit/content/reset-and-check-dirty "$HISTORY"
+        ble/widget/accept-line
       else
+        # Reprint the prompt, accounting for multiple lines
+        local __atuin_prompt_offset
+        __atuin_prompt_offset=$(echo -n "${PS1@P}" | tr -cd '\n' | wc -c)
+        if ((__atuin_prompt_offset > 0)); then
+          tput cuu "$__atuin_prompt_offset"
+        fi
+        echo "${PS1@P}$HISTORY"
+
         # Assuming bash-preexec
         # Invoke every function in the preexec array
         local preexec_function
@@ -46,7 +48,7 @@ __atuin_history() {
         local preexec_ret_value=0
         for preexec_function in "${preexec_functions[@]:-}"; do
           if type -t "$preexec_function" 1>/dev/null; then
-            __bp_set_ret_value "${__bp_last_ret_value:-}"
+            __atuin_set_ret_value "${__bp_last_ret_value:-}"
             "$preexec_function" "$HISTORY"
             preexec_function_ret_value="$?"
             if [[ "$preexec_function_ret_value" != 0 ]]; then
@@ -55,35 +57,32 @@ __atuin_history() {
           fi
         done
         # shellcheck disable=SC2154
-        __bp_set_ret_value "$preexec_ret_value" "$__bp_last_argument_prev_command" 
-      fi
-      # Juggle the terminal settings so that the command can be interacted with
-      local stty_backup
-      stty_backup=$(stty -g)
-      stty "$ATUIN_STTY"
+        __atuin_set_ret_value "$preexec_ret_value" "$__bp_last_argument_prev_command"
 
-      eval "$HISTORY"
-      exit_status=$?
+        # Juggle the terminal settings so that the command can be interacted with
+        local stty_backup
+        stty_backup=$(stty -g)
+        stty "$ATUIN_STTY"
 
-      stty "$stty_backup"
+        eval "$HISTORY"
+        exit_status=$?
 
-      # Execute preprompt commands
-      __atuin_set_ret_value "$exit_status" "$HISTORY"
-      eval "$PROMPT_COMMAND"
-      # Need to reexecute the blehook
-      if [[ -n "${BLE_VERSION-}" ]]; then
+        stty "$stty_backup"
+
+        # Execute preprompt commands
+        __atuin_set_ret_value "$exit_status" "$HISTORY"
+        eval "$PROMPT_COMMAND"
+        # Add it to the bash history
+        history -s "$HISTORY"
+        # Bash will redraw only the line with the prompt after we finish,
+        # so to work for a multiline prompt we need to print it ourselves,
+        # then move up a line
+        __atuin_set_ret_value "$exit_status" "$HISTORY"
+        echo "${PS1@P}"
+        tput cuu 1
         __atuin_set_ret_value "$exit_status" "$HISTORY"
-        blehook/invoke PRECMD "$?"
       fi
-      # Add it to the bash history
-      history -s "$HISTORY"
-      # Bash will redraw only the line with the prompt after we finish,
-      # so to work for a multiline prompt we need to print it ourselves,
-      # then move up a line
-      __atuin_set_ret_value "$exit_status" "$HISTORY"
-      echo "${PS1@P}"
-      tput cuu 1
-      __atuin_set_ret_value "$exit_status" "$HISTORY"
+
       READLINE_LINE=""
       READLINE_POINT=${#READLINE_LINE}
     else
@@ -92,10 +91,9 @@ __atuin_history() {
     fi
 }
 
-if [[ -n "${BLE_VERSION-}" ]]; then
-    blehook PRECMD-+=__atuin_precmd
-    blehook PREEXEC-+=__atuin_preexec
-else
-    precmd_functions+=(__atuin_precmd)
-    preexec_functions+=(__atuin_preexec)
+# shellcheck disable=SC2154
+if [[ -n "${BLE_VERSION-}" ]] && ((_ble_version >= 400)); then
+    ble-import contrib/integration/bash-preexec
 fi
+precmd_functions+=(__atuin_precmd)
+preexec_functions+=(__atuin_preexec)