Add xonsh ctrl-R search

atuin/src/shell/atuin.xsh

@@ -15,4 +15,24 @@ def _atuin_postcommand(cmd: str, rtn: int, out, ts):
         # For more details, see https://github.com/xonsh/xonsh/issues/5224
         # (atuin history end --exit @(rtn) -- $ATUIN_HISTORY_ID &) > /dev/null 2>&1
         atuin history end --exit @(rtn) -- $ATUIN_HISTORY_ID > /dev/null 2>&1
-    del $ATUIN_HISTORY_ID
+    del $ATUIN_HISTORY_ID
+
+import tempfile
+from prompt_toolkit.keys import Keys
+@events.on_ptk_create
+def _custom_keybindings(bindings, **kw):
+
+    @bindings.add(Keys.ControlR)
+    def search(event):
+        # We can't use $() notation, as that would prevent the TUI from being shown
+        # xonsh.lib.subprocess.check_output has the same issue, and 
+        # xonsh.lib.subprocess.run can't capture output.
+        # xonsh.procs.specs.SubprocSpec doesn't support redirecting output either.
+        # As inefficient as it is, we have to use a temporary file
+        with tempfile.NamedTemporaryFile(mode="w+", encoding="utf8") as f:
+            atuin search -i -- @(event.current_buffer.text) e> @(f.name)
+            cmd = f.read().rstrip('\n')
+            event.current_buffer.reset()
+            event.current_buffer.insert_text(cmd)
+
+del _custom_keybindings