[lldb/Interpreter] Add `interpreter.repeat-previous-command` setting

This patch introduces a new interpreter setting to prevent LLDB from
re-executing the previous command when passing an empty command.

This can be very useful when performing actions that requires a long
time to complete.

To preserve the original behaviour, the setting defaults to `true`.

rdar://74983516

Differential Revision: https://reviews.llvm.org/D97999

Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/lldb/source/Interpreter/CommandInterpreter.cpp b/lldb/source/Interpreter/CommandInterpreter.cpp
index b0ff634..eeef14b 100644
--- a/lldb/source/Interpreter/CommandInterpreter.cpp
+++ b/lldb/source/Interpreter/CommandInterpreter.cpp
@@ -223,6 +223,12 @@ bool CommandInterpreter::GetSpaceReplPrompts() const {
       nullptr, idx, g_interpreter_properties[idx].default_uint_value != 0);
 }
 
+bool CommandInterpreter::GetRepeatPreviousCommand() const {
+  const uint32_t idx = ePropertyRepeatPreviousCommand;
+  return m_collection_sp->GetPropertyAtIndexAsBoolean(
+      nullptr, idx, g_interpreter_properties[idx].default_uint_value != 0);
+}
+
 void CommandInterpreter::Initialize() {
   LLDB_SCOPED_TIMER();
 
@@ -1695,6 +1701,11 @@ bool CommandInterpreter::HandleCommand(const char *command_line,
   }
 
   if (empty_command) {
+    if (!GetRepeatPreviousCommand()) {
+      result.SetStatus(eReturnStatusSuccessFinishNoResult);
+      return true;
+    }
+
     if (m_command_history.IsEmpty()) {
       result.AppendError("empty command");
       result.SetStatus(eReturnStatusFailed);