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cmake (Windows): initialize vcpkg/build dependencies automatically
The idea of having CMake support in Git's source tree is to enable contributors on Windows to start contributing with little effort. To that end, we just added some sensible defaults that will let users open the worktree in Visual Studio and start building. This expects the dependencies (such as zlib) to be available already, though. If they are not available, we expect the user to run `compat/vcbuild/vcpkg_install.bat`. Rather than requiring this step to be manual, detect the situation and run it as part of the CMake configuration step. Note that this obviously only applies to the scenario when we want to compile in Visual Studio (i.e. with MS Visual C), not with GCC. Therefore, we guard this new code block behind the `MSVC` conditional. This concludes our journey to make it as effortless as possible to start developing Git in Visual Studio: all the developer needs to do is to clone Git's repository, open the worktree via `File>Open>Folder...` and wait for CMake to finish configuring. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -42,6 +42,10 @@ cmake_minimum_required(VERSION 3.14)
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set(CMAKE_SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/../..)
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if(WIN32)
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set(VCPKG_DIR "${CMAKE_SOURCE_DIR}/compat/vcbuild/vcpkg")
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if(MSVC AND NOT EXISTS ${VCPKG_DIR})
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message("Initializing vcpkg and building the Git's dependencies (this will take a while...)")
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execute_process(COMMAND ${CMAKE_SOURCE_DIR}/compat/vcbuild/vcpkg_install.bat)
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endif()
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list(APPEND CMAKE_PREFIX_PATH "${VCPKG_DIR}/installed/x64-windows")
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# In the vcpkg edition, we need this to be able to link to libcurl
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