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Skip FetchContent if relevant targets already exist #176

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53 changes: 31 additions & 22 deletions cmake/FindDependencies.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -21,30 +21,39 @@ if(TESTS_ENABLED)
endif()

include(FetchContent)
FetchContent_Declare(PoseLib
GIT_REPOSITORY https://github.com/PoseLib/PoseLib.git
GIT_TAG 0439b2d361125915b8821043fca9376e6cc575b9
EXCLUDE_FROM_ALL
SYSTEM
)
message(STATUS "Configuring PoseLib...")
if (FETCH_POSELIB)
FetchContent_MakeAvailable(PoseLib)

if (NOT TARGET PoseLib AND NOT TARGET PoseLib::PoseLib)
FetchContent_Declare(PoseLib
GIT_REPOSITORY https://github.com/PoseLib/PoseLib.git
GIT_TAG 0439b2d361125915b8821043fca9376e6cc575b9
EXCLUDE_FROM_ALL
SYSTEM
)
message(STATUS "Configuring PoseLib...")
if (FETCH_POSELIB)
FetchContent_MakeAvailable(PoseLib)
else()
find_package(PoseLib REQUIRED)
endif()
message(STATUS "Configuring PoseLib... done")
else()
find_package(PoseLib REQUIRED)
message(STATUS "PoseLib target already exists.")
endif()
message(STATUS "Configuring PoseLib... done")

FetchContent_Declare(COLMAP
GIT_REPOSITORY https://github.com/colmap/colmap.git
GIT_TAG 78f1eefacae542d753c2e4f6a26771a0d976227d
EXCLUDE_FROM_ALL
)
message(STATUS "Configuring COLMAP...")
set(UNINSTALL_ENABLED OFF CACHE INTERNAL "")
if (FETCH_COLMAP)
FetchContent_MakeAvailable(COLMAP)
if (NOT TARGET colmap AND NOT TARGET colmap::colmap)
FetchContent_Declare(COLMAP
GIT_REPOSITORY https://github.com/colmap/colmap.git
GIT_TAG 78f1eefacae542d753c2e4f6a26771a0d976227d
EXCLUDE_FROM_ALL
)
message(STATUS "Configuring COLMAP...")
set(UNINSTALL_ENABLED OFF CACHE INTERNAL "")
if (FETCH_COLMAP)
FetchContent_MakeAvailable(COLMAP)
else()
find_package(COLMAP REQUIRED)
endif()
message(STATUS "Configuring COLMAP... done")
else()
find_package(COLMAP REQUIRED)
message(STATUS "COLMAP target already exists.")
endif()
message(STATUS "Configuring COLMAP... done")
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