[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>

6 files changed, 17 insertions, 9 deletions

diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp b/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp
index 4b56f3794b..c00734216e 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2.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: 2016 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <SDL.h>
 
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scm_rev.h"
 #include "common/settings.h"
 #include "core/core.h"
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp b/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp
index 32f365e0d0..94a6a69776 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.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 2019 yuzu Emulator Project
@@ -13,7 +13,7 @@
 
 #include <fmt/ranges.h>
 #include <glad/glad.h>
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scm_rev.h"
 #include "common/settings.h"
 #include "common/string_util.h"
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_null.cpp b/src/yuzu_cmd/emu_window/emu_window_sdl2_null.cpp
index 506137bd8a..4947080313 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2_null.cpp
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_null.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-2.0-or-later
 
@@ -7,7 +10,7 @@
 
 #include <fmt/ranges.h>
 
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scm_rev.h"
 #include "video_core/renderer_null/renderer_null.h"
 #include "yuzu_cmd/emu_window/emu_window_sdl2_null.h"
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp b/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp
index f509652bf6..c54e5b4fda 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -7,7 +10,7 @@
 
 #include <fmt/ranges.h>
 
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scm_rev.h"
 #include "video_core/renderer_vulkan/renderer_vulkan.h"
 #include "yuzu_cmd/emu_window/emu_window_sdl2_vk.h"
diff --git a/src/yuzu_cmd/sdl_config.cpp b/src/yuzu_cmd/sdl_config.cpp
index 6e0f254b6b..136043dc9e 100644
--- a/src/yuzu_cmd/sdl_config.cpp
+++ b/src/yuzu_cmd/sdl_config.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -5,7 +8,7 @@
 #define SDL_MAIN_HANDLED
 #include <SDL.h>
 
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "input_common/main.h"
 #include "sdl_config.h"
 
diff --git a/src/yuzu_cmd/yuzu.cpp b/src/yuzu_cmd/yuzu.cpp
index 8124c91ea1..8e518d816c 100644
--- a/src/yuzu_cmd/yuzu.cpp
+++ b/src/yuzu_cmd/yuzu.cpp
@@ -12,8 +12,7 @@
 #include <fmt/ostream.h>
 
 #include "common/detached_tasks.h"
-#include "common/logging/backend.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scm_rev.h"
 #include "common/settings.h"
 #include "common/string_util.h"