From b8b32a6426fb60c711470b6a281b77f007305ea3 Mon Sep 17 00:00:00 2001
From: Ruin0x11 <ipickering2@gmail.com>
Date: Mon, 19 Feb 2024 15:59:05 +0000
Subject: [PATCH 1/2] libretro: add easyrpg core

---
 .../emulators/retroarch/cores.nix             | 36 +++++++++++++++++++
 .../emulators/retroarch/hashes.json           | 11 ++++++
 .../emulators/retroarch/update_cores.py       |  1 +
 3 files changed, 48 insertions(+)

diff --git a/pkgs/applications/emulators/retroarch/cores.nix b/pkgs/applications/emulators/retroarch/cores.nix
index c981f07114ab..72925c0acb79 100644
--- a/pkgs/applications/emulators/retroarch/cores.nix
+++ b/pkgs/applications/emulators/retroarch/cores.nix
@@ -7,10 +7,14 @@
 , cmake
 , curl
 , fetchFromGitHub
+, fetchpatch
 , ffmpeg
 , ffmpeg_4
 , fluidsynth
+, fmt
+, freetype
 , gettext
+, harfbuzz
 , hexdump
 , hidapi
 , icu
@@ -19,21 +23,28 @@
 , libGL
 , libGLU
 , libjpeg
+, liblcf
 , libpcap
 , libpng
+, libsndfile
 , libvorbis
 , libxml2
+, libxmp
 , libzip
 , makeWrapper
+, mpg123
 , nasm
 , openssl
+, opusfile
 , pcre
+, pixman
 , pkg-config
 , portaudio
 , python3
 , retroarch
 , sfml
 , snappy
+, speexdsp
 , udev
 , which
 , xorg
@@ -400,6 +411,31 @@ in
     };
   };
 
+  easyrpg = mkLibretroCore {
+    core = "easyrpg";
+    extraNativeBuildInputs = [ cmake pkg-config ];
+    extraBuildInputs = [ fmt freetype harfbuzz liblcf libpng libsndfile libvorbis libxmp mpg123 opusfile pcre pixman speexdsp ];
+    patches = [
+      # Fixed compatibility with fmt > 9
+      # Remove when version > 0.8
+      (fetchpatch {
+        name = "0001-Fix-building-with-fmtlib-10.patch";
+        url = "https://github.com/EasyRPG/Player/commit/ab6286f6d01bada649ea52d1f0881dde7db7e0cf.patch";
+        hash = "sha256-GdSdVFEG1OJCdf2ZIzTP+hSrz+ddhTMBvOPjvYQHy54=";
+      })
+    ];
+    cmakeFlags = [
+      "-DBUILD_SHARED_LIBS=ON"
+      "-DPLAYER_TARGET_PLATFORM=libretro"
+      "-DCMAKE_INSTALL_DATADIR=${placeholder "out"}/share"
+    ];
+    makefile = "Makefile";
+    meta = {
+      description = "EasyRPG Player libretro port";
+      license = lib.licenses.gpl3Only;
+    };
+  };
+
   eightyone = mkLibretroCore {
     core = "81";
     repo = "eightyone";
diff --git a/pkgs/applications/emulators/retroarch/hashes.json b/pkgs/applications/emulators/retroarch/hashes.json
index 60bbcff311ad..4690bbf6fc8a 100644
--- a/pkgs/applications/emulators/retroarch/hashes.json
+++ b/pkgs/applications/emulators/retroarch/hashes.json
@@ -251,6 +251,17 @@
         },
         "version": "unstable-2023-12-29"
     },
+    "easyrpg": {
+        "fetcher": "fetchFromGitHub",
+        "src": {
+            "owner": "EasyRPG",
+            "repo": "Player",
+            "rev": "f8e41f43b619413f95847536412b56f85307d378",
+            "hash": "sha256-nvWM4czTv/GxY9raomBEn7dmKBeLtSA9nvjMJxc3Q8s=",
+            "fetchSubmodules": true
+        },
+        "version": "unstable-2023-04-29"
+    },
     "eightyone": {
         "fetcher": "fetchFromGitHub",
         "src": {
diff --git a/pkgs/applications/emulators/retroarch/update_cores.py b/pkgs/applications/emulators/retroarch/update_cores.py
index 1795c0f70edc..e45f4464d6f6 100755
--- a/pkgs/applications/emulators/retroarch/update_cores.py
+++ b/pkgs/applications/emulators/retroarch/update_cores.py
@@ -50,6 +50,7 @@ CORES = {
     "dolphin": {"repo": "dolphin"},
     "dosbox": {"repo": "dosbox-libretro"},
     "dosbox-pure": {"repo": "dosbox-pure", "owner": "schellingb"},
+    "easyrpg": {"repo": "Player", "owner": "EasyRPG", "fetch_submodules": True, "rev": "0.8"},
     "eightyone": {"repo": "81-libretro"},
     "fbalpha2012": {"repo": "fbalpha2012"},
     "fbneo": {"repo": "fbneo"},

From bf5a14fb08a416e488ef110dfd7f2c95ebff50ee Mon Sep 17 00:00:00 2001
From: Ruin0x11 <ipickering2@gmail.com>
Date: Mon, 19 Feb 2024 18:29:35 +0000
Subject: [PATCH 2/2] libretro: add comments about easyrpg core build process

---
 pkgs/applications/emulators/retroarch/cores.nix       | 5 +++--
 pkgs/applications/emulators/retroarch/update_cores.py | 4 ++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/pkgs/applications/emulators/retroarch/cores.nix b/pkgs/applications/emulators/retroarch/cores.nix
index 72925c0acb79..b42966f5a10c 100644
--- a/pkgs/applications/emulators/retroarch/cores.nix
+++ b/pkgs/applications/emulators/retroarch/cores.nix
@@ -416,8 +416,9 @@ in
     extraNativeBuildInputs = [ cmake pkg-config ];
     extraBuildInputs = [ fmt freetype harfbuzz liblcf libpng libsndfile libvorbis libxmp mpg123 opusfile pcre pixman speexdsp ];
     patches = [
-      # Fixed compatibility with fmt > 9
-      # Remove when version > 0.8
+      # The following patch is shared with easyrpg-player.
+      # Update when new versions of liblcf and easyrpg-player are released.
+      # See pkgs/games/easyrpg-player/default.nix for details.
       (fetchpatch {
         name = "0001-Fix-building-with-fmtlib-10.patch";
         url = "https://github.com/EasyRPG/Player/commit/ab6286f6d01bada649ea52d1f0881dde7db7e0cf.patch";
diff --git a/pkgs/applications/emulators/retroarch/update_cores.py b/pkgs/applications/emulators/retroarch/update_cores.py
index e45f4464d6f6..3b4ee5f77692 100755
--- a/pkgs/applications/emulators/retroarch/update_cores.py
+++ b/pkgs/applications/emulators/retroarch/update_cores.py
@@ -50,6 +50,10 @@ CORES = {
     "dolphin": {"repo": "dolphin"},
     "dosbox": {"repo": "dosbox-libretro"},
     "dosbox-pure": {"repo": "dosbox-pure", "owner": "schellingb"},
+    # The EasyRPG core is pinned to 0.8 since it depends on version 0.8 of liblcf, which
+    # was released in April 2023.
+    # Update the version when a compatible liblcf is available.
+    # See pkgs/games/easyrpg-player/default.nix for details.
     "easyrpg": {"repo": "Player", "owner": "EasyRPG", "fetch_submodules": True, "rev": "0.8"},
     "eightyone": {"repo": "81-libretro"},
     "fbalpha2012": {"repo": "fbalpha2012"},