<#
    .SYNOPSIS
    Copy-ChangedFilesFromGit
    .DESCRIPTION
    This function uses git (git status --porcelain) to get list of files
    modified in local git repository and copies those files into a separate
    directory to serve as a backup of your changes. It also saves full paths
    of all coppied files in index.txt (as default), toegether with the
    backup.
    .EXAMPLE
    copygit c:\git\myproj
    .NOTES
     author: Albert
#>
function Copy-ChangedFilesFromGit {
    [cmdletbinding()]
    param(
        [string] $repo = "C:\git\mfxi",
        [string] $output = "$home\Desktop\changes-backup\",
        [string] $index = "$output\index.txt"
    )

    if(Test-Path $output){
        Write-Verbose "Renaming previous backup"
        Rename-Item $output ($output + "_" + (Get-Date -format "ddhhmmss"))
    }

    Write-Verbose "Creating output directory"
    New-Item -Path $output -ItemType Directory

    $gitOutput = git --git-dir="$repo\.git" status --porcelain
    $files = $gitOutput -replace "/","\" -split "`n"
    $files | ForEach-Object {
        if($_[1] -ne 'D'){
            $file = Get-ChildItem "$repo\*$($_.Substring(3))" | Select-Object -ExpandProperty FullName
            Write-Verbose "Copying: $file to: $output"
            Copy-Item $file -Destination $output
            Out-File -File $index -InputObject $file -Append
        }
    }
}

New-Alias -Name copygit -Value Copy-ChangedFilesFromGit
New-Alias -Name copychanges -Value Copy-ChangedFilesFromGit
New-Alias -Name cpgit -Value Copy-ChangedFilesFromGit
New-Alias -Name cpchanges -Value Copy-ChangedFilesFromGit
Export-ModuleMember -Alias * -Function *