chore(profiles/base): replace default bash prompt (PS1) to not contain a newline

profiles/base/default.nix

@@ -42,4 +42,21 @@
     usbutils
     pciutils
   ];
+  programs.bash.promptInit = ''
+    # Provide a nice prompt if the terminal supports it.
+    if [ "$TERM" != "dumb" ] || [ -n "$INSIDE_EMACS" ]; then
+      PROMPT_COLOR="38;5;253m"
+      PATH_PROMPT_COLOR="38;5;199m"
+      ((UID)) && PROMPT_COLOR="1;32m"
+      if [ -n "$INSIDE_EMACS" ]; then
+        # Emacs term mode doesn't support xterm title escape sequence (\e]0;)
+        PS1="[\[\033[$PROMPT_COLOR\]\u\033[0m@\H:\033[1m\033[$PATH_PROMPT_COLOR\w\a\]\[\033[0m\]]\$ "
+      else
+        PS1="[\[\033[$PROMPT_COLOR\]\u\033[0m@\H:\033[1m\033[$PATH_PROMPT_COLOR\w\a\]\[\033[0m\]]\$ "
+      fi
+      if test "$TERM" = "xterm"; then
+        PS1="\[\033]2;\h:\u:\w\007\]$PS1"
+      fi
+    fi
+  '';
 }