Add Flatpak manifest and Builder instructions

README.md

@@ -60,6 +60,20 @@ If you want to make a release build, you need to specify `-DCMAKE_BUILD_TYPE=Rel
 
 ### Linux
 
+#### GNOME Builder
+1. Set up Flathub by following the [guide](https://flatpak.org/setup/) for your distribution.
+1. Install [GNOME Builder](https://flathub.org/apps/details/org.gnome.Builder).
+1. Open GNOME Builder.
+1. Press the Clone Repository button, enter `https://github.com/YaLTeR/BunnymodXT.git` and press Clone Project. Wait until it finishes.
+
+   The cloning window should close, and a new window with the BunnymodXT project should open.
+1. If Builder prompts you to install missing SDKs, press Install and wait for the process to finish. It will take a while. You can monitor the progress by pressing the circle in the top-right.
+1. Click on the bar at the top-center which says BunnymodXT, and click the Build button.
+1. Once the build finishes, in the same bar menu click the Export Bundle button. The file manager will open in a path that looks like `gnome-builder/projects/BunnymodXT/flatpak/staging/x86_64-master`. Navigate up to the `BunnymodXT` folder, then down to `builds/rs.bxt.BunnymodXT.json-...` where you will find the built `libBunnymodXT.so`.
+1. Now you can make some changes to the code and press Build, then grab `libBunnymodXT.so` from the same folder.
+
+#### Manually
+
 Building on Linux requires
 
 - A recent GCC or Clang toolchain

build-aux/flatpak/rs.bxt.BunnymodXT.json

@@ -0,0 +1,54 @@
+{
+    "app-id": "rs.bxt.BunnymodXT",
+    "runtime": "org.freedesktop.Sdk",
+    "runtime-version": "20.08",
+    "command": "",
+    "sdk": "org.freedesktop.Sdk",
+    "sdk-extensions": [
+        "org.freedesktop.Sdk.Compat.i386",
+        "org.freedesktop.Sdk.Extension.toolchain-i386",
+        "org.freedesktop.Sdk.Extension.rust-stable"
+    ],
+    "build-options": {
+        "append-path": "/usr/lib/sdk/toolchain-i386/bin:/usr/lib/sdk/rust-stable/bin",
+        "build-args" : [
+            "--share=network"
+        ],
+        "env": {
+            "CC": "i686-unknown-linux-gnu-gcc",
+            "CXX": "i686-unknown-linux-gnu-g++",
+            "RUSTFLAGS": "-C linker=i686-unknown-linux-gnu-gcc"
+        }
+    },
+    "modules": [
+        {
+            "name": "boost",
+            "buildsystem": "simple",
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://boostorg.jfrog.io/artifactory/main/release/1.76.0/source/boost_1_76_0.tar.bz2",
+                    "sha256": "f0397ba6e982c4450f27bf32a2a83292aba035b827a5623a14636ea583318c41"
+                }
+            ],
+            "build-commands": [
+                "./bootstrap.sh --prefix=${FLATPAK_DEST} --with-libraries=headers",
+                "./b2 -j${FLATPAK_BUILDER_N_JOBS} -d0 install"
+            ],
+            "cleanup": [
+                "*"
+            ]
+        },
+        {
+            "name": "BunnymodXT",
+            "buildsystem": "cmake-ninja",
+            "builddir": true,
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "https://github.com/YaLTeR/BunnymodXT.git"
+                }
+            ]
+        }
+    ]
+}