build-aux: Replace Flatpak modules with pre-compiled dependencies

To reduce compile time and prepare for aarch64 support, dependencies
compilation except CEF is moved to a BuildStream project junctionned
with Freedesktop SDK.

The BuildStream project is configured to build dependencies in a
Flatpak-like environment.

Author: tytan652

.github/workflows/build-project.yaml

@@ -312,7 +312,7 @@ jobs:
 
           git config --global --add safe.directory "${GITHUB_WORKSPACE}"
 
-          cache_key='flatpak-builder-${{ hashFiles('build-aux/**/*.json') }}'
+          cache_key='flatpak-builder-${{ hashFiles('build-aux/com.obsproject.Studio.json') }}'
           cache_ref='master'
           read -r id key size unit created accessed <<< \
             "$(gh cache list --ref "refs/heads/${cache_ref}" --key "${cache_key}-x86_64" | head -1)"

.github/workflows/publish.yaml

@@ -153,7 +153,7 @@ jobs:
 
           git config --global --add safe.directory "${GITHUB_WORKSPACE}"
 
-          cache_key='flatpak-builder-${{ hashFiles('build-aux/**/*.json') }}'
+          cache_key='flatpak-builder-${{ hashFiles('build-aux/com.obsproject.Studio.json') }}'
           cache_ref='master'
           read -r id key size unit created accessed <<< \
             "$(gh cache list --ref "refs/heads/${cache_ref}" --key "${cache_key}-x86_64" | head -1)"

build-aux/README.md

@@ -49,24 +49,3 @@ Example of use:
 ```sh
 python3 ./build-aux/format-manifest.py com.obsproject.Studio.json
 ```
-
-## OBS Studio Flatpak Manifest
-
-The manifest is composed of multiple files:
- - The main manifest `com.obsproject.Studio.json`
- - The `modules` folder which contains OBS Studio dependencies modules
-
-### Manifest modules
-
-Modules are ordered/dispatched in numbered categories following a short list of rules:
-- A module must not depend on another module from the same category, so a module can only depend on modules from lower numbered categories.
-- A module without dependencies must be placed in the highest numbered category in use, excluding categories meant for specific types of dependency.
-
-Actual categories:
- - `99-`: CEF
- - `90-`: Headers-only libraries that are dependencies of only OBS Studio
- - `50-`: Modules that are dependencies of only OBS Studio
- - `40-`: Modules that are dependencies of the `50-` category
- - `30-`: FFmpeg
- - `20-`: Modules that are dependencies of FFmpeg
- - `10-`: Modules that are dependencies of the `20-` category

build-aux/com.obsproject.Studio.json

@@ -37,37 +37,79 @@
             "no-autodownload": true
         }
     },
-    "cleanup": [
-        "/share/man",
-        "*.la"
-    ],
     "modules": [
-        "modules/10-mbedtls.json",
-        "modules/20-librist.json",
-        "modules/20-nv-codec.json",
-        "modules/20-srt.json",
-        "modules/20-svt-av1.json",
-        "modules/20-x264.json",
-        "modules/30-ffmpeg.json",
-        "modules/40-luajit.json",
-        "modules/40-plog.json",
-        "modules/40-usrsctp.json",
-        "modules/50-intel-media-sdk.json",
-        "modules/50-jansson.json",
-        "modules/50-libdatachannel.json",
-        "modules/50-libqrcodegencpp.json",
-        "modules/50-libvpl.json",
-        "modules/50-ntv2.json",
-        "modules/50-rnnoise.json",
-        "modules/50-swig.json",
-        "modules/50-v4l-utils.json",
-        "modules/50-vpl-gpu-rt.json",
-        "modules/90-asio.json",
-        "modules/90-nlohmann-json.json",
-        "modules/90-simde.json",
-        "modules/90-uthash.json",
-        "modules/90-websocketpp.json",
-        "modules/99-cef.json",
+        {
+            "name": "obs-deps-base",
+            "buildsystem": "simple",
+            "build-commands": [
+                "tar -xvf base.tar.xz -C /"
+            ],
+            "sources": [
+                {
+                    "type": "file",
+                    "dest-filename": "base.tar.xz",
+                    "url": "https://github.com/obsproject/obs-deps-buildstream/releases/download/2025-10-03/flatpak-base-x86_64-2025-10-03.tar.xz",
+                    "sha256": "5bb40382cf587c0f20f6bead0f93f41ab0ea252a49f3d3ea73e8d554eb44ef6d"
+                }
+            ]
+        },
+        {
+            "name": "obs-deps-devel",
+            "buildsystem": "simple",
+            "build-commands": [
+                "tar -xvf devel.tar.xz -C /"
+            ],
+            "sources": [
+                {
+                    "type": "file",
+                    "dest-filename": "devel.tar.xz",
+                    "url": "https://github.com/obsproject/obs-deps-buildstream/releases/download/2025-10-03/flatpak-devel-x86_64-2025-10-03.tar.xz",
+                    "sha256": "69dbbb2f0097503b5c4acd9ee5834f44fc6276e9d3b4ab70526f0ef0292a9797"
+                }
+            ]
+        },
+        {
+            "name": "obs-deps-devtools",
+            "buildsystem": "simple",
+            "build-commands": [
+                "tar -xvf devtools.tar.xz -C /"
+            ],
+            "cleanup": [
+                "*"
+            ],
+            "sources": [
+                {
+                    "type": "file",
+                    "dest-filename": "devtools.tar.xz",
+                    "url": "https://github.com/obsproject/obs-deps-buildstream/releases/download/2025-10-03/flatpak-devtools-x86_64-2025-10-03.tar.xz",
+                    "sha256": "db1e9b7804c3f9f08b3a4321166abfb53462c9f6e6d6ca5a26eb36b8cfa23df3"
+                }
+            ]
+        },
+        {
+            "name": "cef",
+            "build-options": {
+                "no-debuginfo": true
+            },
+            "buildsystem": "simple",
+            "build-commands": [
+                "mkdir -p /app/cef/libcef_dll_wrapper",
+                "cp -R ./include /app/cef",
+                "cp -R ./Release /app/cef",
+                "cp -R ./Resources /app/cef",
+                "cp -R ./build/libcef_dll_wrapper/libcef_dll_wrapper.a /app/cef/libcef_dll_wrapper"
+            ],
+            "cleanup": [
+                "*"
+            ],
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://cdn-fastly.obsproject.com/downloads/cef_binary_6533_linux_x86_64_v6.tar.xz",
+                    "sha256": "7963335519a19ccdc5233f7334c5ab023026e2f3e9a0cc417007c09d86608146"
+                }
+            ]
+        },
         {
             "name": "obs",
             "buildsystem": "cmake-ninja",

build-aux/format-manifest.py

@@ -39,41 +39,12 @@ def main() -> int:
             manifest_string = manifest.read()
             manifest_data = json.loads(manifest_string)
 
-            module_list = manifest_data.get("modules", [])
-
-            obs_object = module_list[-1]
-
-            if type(obs_object) != dict:
-                logger.error(
-                    f"❌ Last element in modules list is not the obs-studio object"
-                )
-                return 2
-
-            new_module_list = []
-
-            for module in module_list:
-                if type(module) == str:
-                    if not os.path.isfile(os.path.join(manifest_path, module)):
-                        logger.warning(
-                            f"⚠️ Specified module {os.path.basename(module)} not found."
-                        )
-                        continue
-
-                    new_module_list.append(module)
-
-            new_module_list.sort()
-            new_module_list.append(obs_object)
-            manifest_data["modules"] = new_module_list
-
             new_manifest_string = (
                 f"{json.dumps(manifest_data, indent=4, ensure_ascii=False)}\n"
             )
 
             if arguments.check:
-                if new_module_list != module_list:
-                    logger.error(f"❌ Module list failed order validation")
-                    return 2
-                elif new_manifest_string != manifest_string:
+                if new_manifest_string != manifest_string:
                     logger.error(f"❌ Manifest file is not correctly formatted")
                     return 2
                 else: