From a57fa34f82d8c2c3305dc862b6b27e0d4f8394f8 Mon Sep 17 00:00:00 2001
From: WerWolv <werwolv98@gmail.com>
Date: Fri, 8 Jul 2022 14:17:22 +0200
Subject: [PATCH] build: Added option for Offline builds

---
 CMakeLists.txt            |  2 ++
 cmake/build_helpers.cmake | 22 ++++++++++++----------
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cfddb1061..1cabaa6d4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,8 @@ set(IMHEX_BASE_FOLDER ${CMAKE_CURRENT_SOURCE_DIR})
 set(CMAKE_MODULE_PATH "${IMHEX_BASE_FOLDER}/cmake/modules")
 include("${IMHEX_BASE_FOLDER}/cmake/build_helpers.cmake")
 
+option(IMHEX_OFFLINE_BUILD "Enable offline build" OFF)
+
 # Make sure project is configured correctly
 setDefaultBuiltTypeIfUnset()
 detectBadClone()
diff --git a/cmake/build_helpers.cmake b/cmake/build_helpers.cmake
index e50b026c9..366aba891 100644
--- a/cmake/build_helpers.cmake
+++ b/cmake/build_helpers.cmake
@@ -290,17 +290,19 @@ endmacro()
 
 
 function(downloadImHexPatternsFiles dest)
-    FetchContent_Declare(
-        imhex_patterns
-        GIT_REPOSITORY https://github.com/WerWolv/ImHex-Patterns.git
-        GIT_TAG master
-    )
+    if (NOT IMHEX_OFFLINE_BUILD)
+        FetchContent_Declare(
+            imhex_patterns
+            GIT_REPOSITORY https://github.com/WerWolv/ImHex-Patterns.git
+            GIT_TAG master
+        )
 
-    FetchContent_Populate(imhex_patterns)
+        FetchContent_Populate(imhex_patterns)
 
-    set(PATTERNS_FOLDERS_TO_INSTALL constants encodings includes patterns magic)
-    foreach (FOLDER ${PATTERNS_FOLDERS_TO_INSTALL})
-        install(DIRECTORY "${imhex_patterns_SOURCE_DIR}/${FOLDER}" DESTINATION ${dest})
-    endforeach()
+        set(PATTERNS_FOLDERS_TO_INSTALL constants encodings includes patterns magic)
+        foreach (FOLDER ${PATTERNS_FOLDERS_TO_INSTALL})
+            install(DIRECTORY "${imhex_patterns_SOURCE_DIR}/${FOLDER}" DESTINATION ${dest})
+        endforeach ()
+    endif ()
 
 endfunction()
\ No newline at end of file