[common/logging] Simplify logging logic and fix issues when logging before system is created (#3688)

- our logging code was bigger than spdlog itself, why???? just keep it simple
- fix issues when logging before logging system is even started
- removes the "initialized logging twice" issue
- removes uneeded indirection in file logging
- uses direct formatting instead of jumping hoopla-around the fmt::format() ressult
- code duplication and dead code removal as usual

I did explore dup2() but I think it's not worth the hassle
I did try `fwopen()` but it's better if things are just kept as-is.

there is a lot of noise because I removed a bunch of redundant files on logging and just put everything in one file

now normally this wouldn't be a good idea, however consider: the complexity of logging; it's less than 500 lines... does it really need a whole subsystem?!?!?! ITS JUST LOGGING

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3688
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: DraVee <chimera@dravee.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/input_common/drivers/gc_adapter.cpp

@@ -1,10 +1,13 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2014 Dolphin Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <fmt/ranges.h>
 #include <libusb.h>
 
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/param_package.h"
 #include "common/polyfill_thread.h"
 #include "common/settings_input.h"

src/input_common/drivers/sdl_driver.cpp

@@ -3,7 +3,7 @@
 // SPDX-FileCopyrightText: 2018 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/math_util.h"
 #include "common/param_package.h"
 #include "common/settings.h"

src/input_common/drivers/tas_input.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -8,7 +11,7 @@
 #include "common/fs/file.h"
 #include "common/fs/fs_types.h"
 #include "common/fs/path_util.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/settings.h"
 #include "input_common/drivers/tas_input.h"
 

src/input_common/drivers/udp_client.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: 2018 Citra Emulator Project
@@ -9,7 +9,7 @@
 #include <boost/asio.hpp>
 #include <fmt/ranges.h>
 
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/param_package.h"
 #include "common/settings.h"
 #include "input_common/drivers/udp_client.h"

src/input_common/drivers/virtual_amiibo.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -7,7 +10,7 @@
 #include "common/fs/file.h"
 #include "common/fs/fs.h"
 #include "common/fs/path_util.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/settings.h"
 #include "input_common/drivers/virtual_amiibo.h"
 

src/input_common/helpers/joycon_driver.cpp

@@ -1,8 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "common/input.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scope_exit.h"
 #include "common/swap.h"
 #include "common/thread.h"

src/input_common/helpers/joycon_protocol/common_protocol.cpp

@@ -1,8 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "common/input.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/helpers/joycon_protocol/common_protocol.h"
 
 namespace InputCommon::Joycon {

src/input_common/helpers/joycon_protocol/generic_functions.cpp

@@ -1,8 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "common/input.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/helpers/joycon_protocol/generic_functions.h"
 
 namespace InputCommon::Joycon {

src/input_common/helpers/joycon_protocol/irs.cpp

@@ -1,8 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "common/input.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/helpers/joycon_protocol/irs.h"
 
 namespace InputCommon::Joycon {

src/input_common/helpers/joycon_protocol/nfc.cpp

@@ -1,11 +1,11 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "common/input.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/helpers/joycon_protocol/nfc.h"
 
 namespace InputCommon::Joycon {

src/input_common/helpers/joycon_protocol/poller.cpp

@@ -1,10 +1,10 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/helpers/joycon_protocol/poller.h"
 
 namespace InputCommon::Joycon {

src/input_common/helpers/joycon_protocol/ringcon.cpp

@@ -1,8 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "common/input.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/helpers/joycon_protocol/ringcon.h"
 
 namespace InputCommon::Joycon {

src/input_common/helpers/joycon_protocol/rumble.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
@@ -8,7 +8,7 @@
 #include <cmath>
 
 #include "common/input.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/helpers/joycon_protocol/rumble.h"
 
 namespace InputCommon::Joycon {

src/input_common/helpers/udp_protocol.cpp

@@ -1,9 +1,12 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2018 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <cstddef>
 #include <cstring>
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/helpers/udp_protocol.h"
 
 namespace InputCommon::CemuhookUDP {

src/input_common/input_engine.cpp

@@ -1,9 +1,9 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/input_engine.h"
 
 namespace InputCommon {