Clone all the repos for a given GitHub username.

Clone-AllGitHubRepos.ps1

function Clone-AllGitHubRepos
{
    <#
    .SYNOPSIS
        Clone all GitHub Repositories of a given user.
    .DESCRIPTION
        Recursively clone all the repos for a given username.
    .EXAMPLE 
        Clone-AllGitHubRepos -User "aspnet" 

    #>
    [cmdletbinding()]
    param(
        [string]$User, 
        [string]$Destination, 
        [string]$ApiUrl = "https://api.github.com/users/$User/repos", 
        [string]$UserAgent = "Powershell"
    )
    
    Write-Verbose ("User: " + $User)
    Write-Verbose ("ApiUrl: " + $ApiUrl)
    
    $wc =  New-Object System.Net.WebClient
    if ($UserAgent) {
        Write-Verbose ("Using user-agent: " + $UserAgent)
        $wc.Headers.Add("User-agent", "$UserAgent")
    }
    $json = $wc.DownloadString($ApiUrl)
    $res = ConvertFrom-Json $json
    if ($Destination) {
        Write-Verbose ("Using destination dir: " + $Destination)
        cd $Destination
    }
    $res | % { Write-Verbose "$($_.name): $($_.html_url)"; git clone $_.html_url }
}