Open solution file in current directory with most recent visual studio

sln.ps1

Function sln([string]$hintPath = $null)
{
    [string[]]$installed = @(gci HKLM:\Software\Microsoft\VisualStudio\) |% { $_.Name } |% { Split-Path $_ -Leaf }
    $versions = @()
    foreach ($i in $installed)
    {
        [Version]$v = "0.0"
        if ([Version]::TryParse($i, [ref]$v))
        {
            $versions += $v
        }
    }
    $versions = $versions | sort -Descending
    [string]$maxVersion = $versions[0]
    $maxVersionRegPath = "HKLM:\Software\Microsoft\VisualStudio\$maxVersion"
    $maxVersionInstallPath = (Get-ItemProperty $maxVersionRegPath).InstallDir
    if (-not $maxVersionInstallPath -or !(Test-Path $maxVersionInstallPath)) {
        $maxVersionInstallPath = (Join-Path ${env:ProgramFiles(x86)} "Microsoft Visual Studio $maxVersion\Common7\IDE")
    }
    for ($vs2017Ver = 2020; $vs2017Ver -ge 2017; $vs2017Ver--) {
        foreach ($vs2017Type in @('Enterprise', 'Professional', 'Community')) {
            $vs2017VerPath = (Join-Path ${env:ProgramFiles(x86)} "Microsoft Visual Studio\$vs2017Ver\$vs2017Type\Common7\IDE")
            if (Test-Path (Join-Path $vs2017VerPath "devenv.exe")) {
                $maxVersionInstallPath = $vs2017VerPath
                break
            }
        }
    }
    $devenv = (Join-Path $maxVersionInstallPath "devenv.exe")
    if (!(Test-Path $devenv))
    {
        Write-Error "Unable to locate devenv: $devenv"
    }
    else
    {
        if ([string]::IsNullOrEmpty($hintPath))
        {
            $searchPath = Resolve-Path '.'
            if (Get-Command 'Get-GitDirectory' -ErrorAction SilentlyContinue)
            {
                $gitDirectory = Get-GitDirectory
                if ((-not [string]::IsNullOrEmpty($gitDirectory)) -and (Test-Path $gitDirectory))
                {
                    $searchPath = Resolve-Path (Split-Path ($gitDirectory))
                }
            }

            $defaultHintPaths = @("src")
            foreach ($hp in $defaultHintPaths) {
                $p = Join-Path $searchPath $hp
                if (Test-Path $p) {
                    if (gci $p *.sln -Recurse -ErrorAction SilentlyContinue) {
                        $searchPath = Resolve-Path $p
                        break
                    }
                }
            }
        }
        else
        {
            Write-Host "Using hint path: " $hintPath
            $searchPath = Resolve-Path $hintPath
        }

        $solutions = @(gci $searchPath *.sln -Recurse)
        if ($solutions.Count -eq 0)
        {
            Write-Error "Unable to find any solution files in $searchPath"
        }
        else
        {
            $sln = Resolve-Path $solutions[0].FullName
            Write-Host "Opening first solution file: $sln"
            pushd (Split-Path $sln)
            Start-Process cmd -ArgumentList @('/c', 'set GIT_DIR=.no_git_for_vs', '&', 'start', '""', ('"' + $devenv + '"'), '/nosplash', ('"' + $sln + '"')) -Verb runAs
            popd
        }
    }
}