git

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@ECHO OFF
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REM ================================================================
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REM This script installs the "vcpkg" source package manager and uses
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REM it to build the third-party libraries that git requires when it
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REM is built using MSVC.
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REM
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REM [1] Install VCPKG.
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REM     [a] Create <root>/compat/vcbuild/vcpkg/
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REM     [b] Download "vcpkg".
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REM     [c] Compile using the currently installed version of VS.
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REM     [d] Create <root>/compat/vcbuild/vcpkg/vcpkg.exe
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REM
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REM [2] Install third-party libraries.
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REM     [a] Download each (which may also install CMAKE).
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REM     [b] Compile in RELEASE mode and install in:
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REM         vcpkg/installed/<arch>/{bin,lib}
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REM     [c] Compile in DEBUG mode and install in:
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REM         vcpkg/installed/<arch>/debug/{bin,lib}
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REM     [d] Install headers in:
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REM         vcpkg/installed/<arch>/include
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REM
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REM [3] Create a set of MAKE definitions for the top-level
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REM     Makefile to allow "make MSVC=1" to find the above
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REM     third-party libraries.
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REM     [a] Write vcpkg/VCPGK-DEFS
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REM
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REM https://blogs.msdn.microsoft.com/vcblog/2016/09/19/vcpkg-a-tool-to-acquire-and-build-c-open-source-libraries-on-windows/
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REM https://github.com/Microsoft/vcpkg
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REM https://vcpkg.readthedocs.io/en/latest/
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REM ================================================================
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	SETLOCAL EnableDelayedExpansion
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	@FOR /F "delims=" %%D IN ("%~dp0") DO @SET cwd=%%~fD
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	cd %cwd%
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	dir vcpkg\vcpkg.exe >nul 2>nul && GOTO :install_libraries
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	echo Fetching vcpkg in %cwd%vcpkg
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	git.exe clone https://github.com/Microsoft/vcpkg vcpkg
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	IF ERRORLEVEL 1 ( EXIT /B 1 )
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	cd vcpkg
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	echo Building vcpkg
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	powershell -exec bypass scripts\bootstrap.ps1
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	IF ERRORLEVEL 1 ( EXIT /B 1 )
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	echo Successfully installed %cwd%vcpkg\vcpkg.exe
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:install_libraries
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	SET arch=x64-windows
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	echo Installing third-party libraries...
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	FOR %%i IN (zlib expat libiconv openssl libssh2 curl) DO (
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	    cd %cwd%vcpkg
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	    IF NOT EXIST "packages\%%i_%arch%" CALL :sub__install_one %%i
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	    IF ERRORLEVEL 1 ( EXIT /B 1 )
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	)
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:install_defines
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	cd %cwd%
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	SET inst=%cwd%vcpkg\installed\%arch%
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	echo vcpkg_inc=-I"%inst%\include">VCPKG-DEFS
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	echo vcpkg_rel_lib=-L"%inst%\lib">>VCPKG-DEFS
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	echo vcpkg_rel_bin="%inst%\bin">>VCPKG-DEFS
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	echo vcpkg_dbg_lib=-L"%inst%\debug\lib">>VCPKG-DEFS
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	echo vcpkg_dbg_bin="%inst%\debug\bin">>VCPKG-DEFS
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	EXIT /B 0
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:sub__install_one
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	echo     Installing package %1...
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	.\vcpkg.exe install %1:%arch%
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	IF ERRORLEVEL 1 ( EXIT /B 1 )
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	echo     Finished %1
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	goto :EOF
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