Run 'git gc' in each subdirectory

git-gc-all.ps1

$originalWorkingDir = Get-Location;
$subDirectories = dir -Directory;

Foreach ($subDirectory in $subDirectories)
{
    $projectDir = Join-Path $originalWorkingDir $subDirectory;
    $gitDir = Join-Path $projectDir '.git'

    if (Test-Path $gitDir -PathType Container)
    {
        Write-Host "$projectDir> $Env:ProgramFiles\Git\bin\git.exe gc";

        Set-Location -Path $projectDir;

        Start-Process "$Env:ProgramFiles\Git\bin\git.exe" -ArgumentList 'gc' -Wait;
    }
}

Set-Location -Path $originalWorkingDir;

Write-Host 'All Done!'