Merge branch 'bash-prompt-marks'

src/shell-integration/bash/ghostty.bash

@@ -101,6 +101,17 @@ function __ghostty_precmd() {
       PS1=$PS1'\[\e]133;B\a\]'
       PS2=$PS2'\[\e]133;B\a\]'
 
+      if [[ "${PS1}" == *"\n"* || "${PS1}" == *$'\n'* ]]; then
+        # bash doesn't redraw the leading lines in a multiline prompt so
+        # mark the last line as a secondary prompt (k=s) to prevent the
+        # preceding lines from being erased by ghostty after a resize.
+        builtin local oldval
+        oldval=$(builtin shopt -p extglob)
+        builtin shopt -s extglob
+        PS1=${PS1%@('\n'|$'\n')*}'\n\[\e]133;A;k=s\a\]'${PS1##*@('\n'|$'\n')}
+        builtin eval "$oldval"
+      fi
+
       # Cursor
       if test "$GHOSTTY_SHELL_INTEGRATION_NO_CURSOR" != "1"; then
         PS1=$PS1'\[\e[5 q\]'