From 8d24768d5d0d2eaa49ed1487b83c4526112d89b2 Mon Sep 17 00:00:00 2001
From: Frank LENORMAND <lenormf@gmail.com>
Date: Sat, 17 Jun 2017 11:27:07 +0300
Subject: [PATCH] src: Add a `commands` debug flag

This commit allows setting the `commands` flag to the `debug` option, in
order to have the engine write on the *debug* buffer the commands that are
being executed, along with their arguments.
---
 src/command_manager.cc | 11 +++++++++++
 src/option.hh          | 16 +++++++++-------
 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/src/command_manager.cc b/src/command_manager.cc
index 6ab012d1..4d422feb 100644
--- a/src/command_manager.cc
+++ b/src/command_manager.cc
@@ -9,6 +9,7 @@
 #include "utils.hh"
 #include "optional.hh"
 #include "containers.hh"
+#include "buffer_utils.hh"
 
 #include <algorithm>
 
@@ -443,6 +444,16 @@ void CommandManager::execute_single_command(CommandParameters params,
     if (command_it == m_commands.end())
         throw command_not_found(params[0]);
 
+    const DebugFlags debug_flags = context.options()["debug"].get<DebugFlags>();
+    if (debug_flags & DebugFlags::Commands)
+    {
+        String repr_parameters;
+
+        for (auto repr_param : param_view)
+            repr_parameters += " " + repr_param;
+        write_to_debug_buffer(format("command {}{}", params[0], repr_parameters));
+    }
+
     try
     {
         ParametersParser parameter_parser(param_view,
diff --git a/src/option.hh b/src/option.hh
index dc1acaae..c0d450d5 100644
--- a/src/option.hh
+++ b/src/option.hh
@@ -36,22 +36,24 @@ using TimestampedList = PrefixedList<size_t, T>;
 
 enum class DebugFlags
 {
-    None  = 0,
-    Hooks = 1 << 0,
-    Shell = 1 << 1,
-    Profile = 1 << 2,
-    Keys = 1 << 3,
+    None     = 0,
+    Hooks    = 1 << 0,
+    Shell    = 1 << 1,
+    Profile  = 1 << 2,
+    Keys     = 1 << 3,
+    Commands = 1 << 4,
 };
 
 constexpr bool with_bit_ops(Meta::Type<DebugFlags>) { return true; }
 
-constexpr Array<EnumDesc<DebugFlags>, 4> enum_desc(Meta::Type<DebugFlags>)
+constexpr Array<EnumDesc<DebugFlags>, 5> enum_desc(Meta::Type<DebugFlags>)
 {
     return { {
         { DebugFlags::Hooks, "hooks" },
         { DebugFlags::Shell, "shell" },
         { DebugFlags::Profile, "profile" },
-        { DebugFlags::Keys, "keys" }
+        { DebugFlags::Keys, "keys" },
+        { DebugFlags::Commands, "commands" },
     } };
 }