initial commit

third_party/eigen/scripts/msvc_setup.ps1

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+# Powershell script to set up MSVC environment.
+
+param ($EIGEN_CI_MSVC_ARCH, $EIGEN_CI_MSVC_VER)
+
+Set-PSDebug -Trace 1
+
+function Get-ScriptDirectory { Split-Path $MyInvocation.ScriptName }
+       
+# Set defaults if not already set.
+IF (!$EIGEN_CI_MSVC_ARCH)             { $EIGEN_CI_MSVC_ARCH             = "x64" }
+IF (!$EIGEN_CI_MSVC_VER)              { $EIGEN_CI_MSVC_VER              = "14.29" }
+
+# Export variables into the global scope
+$global:EIGEN_CI_MSVC_ARCH             = $EIGEN_CI_MSVC_ARCH
+$global:EIGEN_CI_MSVC_VER              = $EIGEN_CI_MSVC_VER
+
+# Find Visual Studio installation directory.
+$global:VS_INSTALL_DIR = &"${Env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe" -latest -property installationPath
+# Run VCVarsAll.bat incitialization script and extract environment variables.
+# http://allen-mack.blogspot.com/2008/03/replace-visual-studio-command-prompt.html
+cmd.exe /c "`"${VS_INSTALL_DIR}\VC\Auxiliary\Build\vcvarsall.bat`" $EIGEN_CI_MSVC_ARCH -vcvars_ver=$EIGEN_CI_MSVC_VER & set" | foreach { if ($_ -match "=") { $v = $_.split("="); set-item -force -path "ENV:\$($v[0])" -value "$($v[1])" } }