internal: add BUILD_PATCHES option

.github/workflows/deploy.yml

@@ -123,6 +123,7 @@ jobs:
                     && ./build.sh --configure \
                        -DBUILD_UNIT_TESTS=OFF \
                        -DBUILD_GAMEMODE=ON \
+                       -DBUILD_PATCHES=ON \
                        -DOFFLINE_MODE=OFF \
                        -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} \
                        -DGITHUB_TOKEN=${{env.GAMEMODE_GITHUB_TOKEN}}

CMakeLists.txt

@@ -67,6 +67,7 @@ option(PREPARE_NEXUS_ARCHIVES "Prepare SP and other archives during build or not
 option(BUILD_UNIT_TESTS "Build unit tests (excluded from build when off - workaround for #1182)" ON)
 option(INSTALL_CLIENT_DIST "Install the client into SKYRIM_DIR after build" OFF)
 option(BUILD_GAMEMODE "Build gamemode" OFF)
+option(BUILD_PATCHES "Build patches" OFF)
 option(OFFLINE_MODE "Enable offline mode in generated server settings and client settings" ON)
 
 message(STATUS JS_ENGINE_TRACING_ENABLED=${JS_ENGINE_TRACING_ENABLED})
@@ -120,6 +121,18 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/modules)
 
+if(BUILD_PATCHES)
+  if(GITHUB_TOKEN)
+    include(cmake/download_and_apply_git_patch.cmake)
+    set(PATCH_URL "https://raw.githubusercontent.com/Pospelove/skymp5-patches/master/patch.patch?token=${GITHUB_TOKEN}")
+    set(EXPECTED_SHA512 "0")
+    set(PATCH_FILE "${CMAKE_BINARY_DIR}/patch.patch")
+    download_and_apply_git_patch(${PATCH_URL} ${PATCH_FILE} ${EXPECTED_SHA512})
+  else()
+    message(FATAL_ERROR "GITHUB_TOKEN is not set. Please set it to your GitHub personal access token.")
+  endif()
+endif()
+
 add_subdirectory(viet)
 add_subdirectory(savefile)
 add_subdirectory(papyrus-vm)

cmake/download_and_apply_git_patch.cmake

@@ -0,0 +1,40 @@
+function(download_and_apply_git_patch patch_url patch_file expected_sha512)
+    # Download the patch file
+    message(STATUS "Downloading patch file: ${patch_url}")
+    file(DOWNLOAD ${patch_url} ${patch_file}
+         TIMEOUT 60  # Adjust the timeout as necessary
+         EXPECTED_HASH SHA512=${expected_sha512}
+         STATUS download_status
+         SHOW_PROGRESS)
+
+    # Check if download was successful
+    list(GET download_status 0 status_code)
+    list(GET download_status 1 status_string)
+    if(NOT status_code EQUAL 0)
+        message(FATAL_ERROR "Error downloading patch: ${status_string}")
+    endif()
+
+    # Check if the patch has already been applied
+    execute_process(
+        COMMAND git apply --check ${patch_file}
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        RESULT_VARIABLE PATCH_APPLIED
+        OUTPUT_QUIET
+        ERROR_QUIET
+    )
+
+    # Apply the git patch if it has not been applied yet
+    if(NOT PATCH_APPLIED EQUAL 0)
+        message(STATUS "Applying git patch ${patch_file}")
+        execute_process(
+            COMMAND git apply ${patch_file}
+            WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+            RESULT_VARIABLE PATCH_RESULT
+        )
+        if(NOT PATCH_RESULT EQUAL 0)
+            message(FATAL_ERROR "Failed to apply git patch: ${patch_file}")
+        endif()
+    else()
+        message(STATUS "Patch ${patch_file} already applied")
+    endif()
+endfunction()