################################################################################
##  File:  Install-Msys2.ps1
##  Desc:  Install Msys2 and 64 & 32 bit gcc, cmake, & llvm
################################################################################

# References
# https://github.com/msys2/MINGW-packages/blob/master/azure-pipelines.yml
# https://packages.msys2.org/group/

$dash = "-" * 40

# Downloading msys2
$msys2Release = "https://api.github.com/repos/msys2/msys2-installer/releases/latest"
$msys2Uri = ((Invoke-RestMethod $msys2Release).assets | Where-Object {
  $_.name -match "x86_64" -and $_.name.EndsWith("sfx.exe") }).browser_download_url
$msys2File = Start-DownloadWithRetry -Url $msys2Uri

# extract sfx.exe to C:\
Write-Host "Starting msys2 extraction"
& $msys2File -y -oC:\
Write-Host "Finished extraction"

# Add msys2 bin tools folders to PATH temporary
$env:PATH = "C:\msys64\mingw64\bin;C:\msys64\usr\bin;$env:PATH"

Write-Host "`n$dash bash pacman-key --init"
bash.exe -c "pacman-key --init 2>&1"

Write-Host "bash pacman-key --populate msys2"
bash.exe -c "pacman-key --populate msys2 2>&1"

Write-Host "`n$dash pacman --noconfirm -Syyuu"
pacman.exe -Syyuu --noconfirm
taskkill /f /fi "MODULES eq msys-2.0.dll"
Write-Host "`n$dash pacman --noconfirm -Syuu (2nd pass)"
pacman.exe -Syuu  --noconfirm
taskkill /f /fi "MODULES eq msys-2.0.dll"

Write-Host "`n$dash Install msys2 packages"
pacman.exe -S --noconfirm --needed --noprogressbar base-devel compression
taskkill /f /fi "MODULES eq msys-2.0.dll"

Write-Host "`n$dash Remove p7zip/7z package due to conflicts"
pacman.exe -R --noconfirm --noprogressbar p7zip

# mingw package list
$tools64 = "___clang ___clang-tools-extra ___cmake ___llvm  ___toolchain ___ragel"
$tools32 = "___clang ___cmake ___llvm  ___toolchain ___ragel"

# install mingw64 packages
Write-Host "`n$dash Install mingw64 packages"
$pre = "mingw-w64-x86_64-"
pacman.exe -S --noconfirm --needed --noprogressbar $tools64.replace('___', $pre).split(' ')

# install mingw32 packages
Write-Host "`n$dash Install mingw32 packages"
$pre = "mingw-w64-i686-"
pacman.exe -S --noconfirm --needed --noprogressbar $tools32.replace('___', $pre).split(' ')

# install openssh
Write-Host "`n$dash Install openssh package"
pacman.exe -S --noconfirm --needed --noprogressbar openssh

# clean all packages to decrease image size
Write-Host "`n$dash Clean packages"
pacman.exe -Scc --noconfirm

Write-Host "`n$dash Installed mingw64 packages"
pacman.exe -Q | grep ^mingw-w64-x86_64-

Write-Host "`n$dash Installed mingw32 packages"
pacman.exe -Q | grep ^mingw-w64-i686-

Write-Host "`n$dash Installed msys2 packages"
pacman.exe -Q | grep -v ^mingw-w64-

Write-Host "`nMSYS2 installation completed"

# Environment
# add C:\msys64\mingw64\bin and C:\msys64\usr\bin to PATH
# C:\msys64\mingw64\bin add after C:\Windows\System32 to not replace built-in tar.exe
$regEnvKey = 'HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager\Environment\'
$pathValue = Get-ItemPropertyValue -Path $regEnvKey -Name 'Path'
$pathValue += ";C:\msys64\mingw64\bin;C:\msys64\usr\bin"
Set-ItemProperty -Path $regEnvKey -Name 'Path' -Value $pathValue

# Add well-known SSH host keys to ssh_known_hosts to Msys2
ssh-keyscan -t rsa github.com >> "C:\msys64\etc\ssh\ssh_known_hosts"
ssh-keyscan -t rsa ssh.dev.azure.com >> "C:\msys64\etc\ssh\ssh_known_hosts"

# Add well-known SSH host keys to ssh_known_hosts to Git
if (Test-Path "C:\Program Files\Git\etc\ssh")
{
  ssh-keyscan -t rsa github.com >> "C:\Program Files\Git\etc\ssh\ssh_known_hosts"
  ssh-keyscan -t rsa ssh.dev.azure.com >> "C:\Program Files\Git\etc\ssh\ssh_known_hosts"
}

# Copy bash wrapper from git
$wrapperPath = "C:\msys64\bin"
New-Item -Path $wrapperPath -ItemType Directory -Force | Out-Null
Copy-Item -Path "$env:ProgramFiles\Git\bin\bash.exe" -Destination $wrapperPath
Copy-Item -Path "$env:ProgramFiles\Git\bin\sh.exe" -Destination $wrapperPath

Invoke-PesterTests -TestFile "MSYS2"