Installs Miniconda from extracted .exe installer

Install-Miniconda.ps1

param(
    [string]$Exe7z,
    [string]$PackageDir,
    [string]$InstallDir
)

Function Expand-ToDirectory {
    param(
        [string]$Archive,
        [string]$TargetDir
    )

    Write-Host "INFO: Expanding $Archive to $TargetDir"
    & $Exe7z x -aoa -bd $Archive -o"$TargetDir" > null
    If ($LASTEXITCODE -ne 0) {
        Throw "Failed to expand $Archive to $TargetDir with error code $LASTEXITCODE"
    }
}

Function Install-MinicondaPackage {
    param([string]$Package)

    Write-Host "INFO: Installing package $Package"
    Expand-ToDirectory -Archive $Package -TargetDir $InstallDir
    & "$InstallDir\python.exe" -E -s "$InstallDir\pkgs\.install.py" --root-prefix "$InstallDir" --post root
    If ($LASTEXITCODE -ne 0) {
        Throw "Failed to install $Package with error code $LASTEXITCODE"
    }
}

Write-Host "INFO: Creating $InstallDir"
New-Item -Type Directory $InstallDir -Force | Out-Null

Write-Host "INFO: Copying $PackageDir\Lib to $InstallDir"
Copy-Item "$PackageDir\Lib" $InstallDir -Recurse -Container -Force | Out-Null

Write-Host "INFO: Expanding tar.bz2 files"
Expand-ToDirectory -Archive "$PackageDir\preconda.tar.bz2" -TargetDir $PackageDir
Expand-ToDirectory -Archive "$PackageDir\preconda.tar" -TargetDir $InstallDir
Expand-ToDirectory -Archive "$PackageDir\pkgs\*.bz2" -TargetDir "$PackageDir\pkgs"

Write-Host "INFO: Getting list of packages"
$Packages = Get-ChildItem "$PackageDir\pkgs" -Filter *.tar | Select-Object -ExpandProperty FullName

Write-Host "INFO: Bootstrapping Python"
Expand-ToDirectory -Archive ($Packages -like '*vs*_runtime*') -TargetDir $InstallDir
Install-MinicondaPackage -Package ($Packages -like '*python*')

Write-Host "INFO: Installing packages"
$Packages -notlike '*python*' | %{Install-MinicondaPackage -Package $_}

Write-Host "INFO: Running post-install scripts"
& "$InstallDir\python.exe" -E -s "$InstallDir\Lib\_nsis.py" mkdirs
& "$InstallDir\python.exe" -E -s "$InstallDir\Lib\_nsis.py" addpath