gift.ps1

# git for fork.
param (
    [string] $RepoUrl,
    [string] $Dest
)

function Help {
    Write-Host 'Git command for clone repo which not belong to you.'
    Write-Host '  -> create dir with name ' -NoNewline
    Write-Host '$host#$user#$repo' -ForegroundColor Green
    Write-Host ''
    Write-Host '// use ' -NoNewline
    Write-Host 'Get-Help gift' -ForegroundColor Yellow -NoNewline
    Write-Host ' to get parameter info'
}

if (!$RepoUrl) {
    Help
    return
}

function ParseRepoUrl([string] $url) {
    $schemaPrefixPattern = '(?:https://)'
    $hostPattern = '(?<host>.+)'
    $userPattern = '(?<user>[^/]+)'
    $projPattern = '(?<proj>[^/]+)'

    function Perpare([hashtable] $table) {
        if (!$table.ContainsKey('GitUrl')) {
            $gitHost = $table.Host
            $user = $table.User
            $proj = $table.Proj
            $table['GitUrl'] = "https://$gitHost/$user/$proj.git"
        }

        return $table
    }

    if ($url -match "^$schemaPrefixPattern$hostPattern/$userPattern/$projPattern\.git$") {
        return Perpare(@{
            Host = $Matches.host
            User = $Matches.user
            Proj = $Matches.proj
            GitUrl = $url
        })
    }

    if ($url -match "^$schemaPrefixPattern$hostPattern/$userPattern/$projPattern$") {
        return Perpare(@{
            Host = $Matches.host
            User = $Matches.user
            Proj = $Matches.proj
            GitUrl = "$url.git"
        })
    }

    if ($url -match "^$userPattern/$projPattern$") {
        return Perpare(@{
            Host = 'github.com'
            User = $Matches.user
            Proj = $Matches.proj
        })
    }
}

$repoInfo = ParseRepoUrl $RepoUrl

if ($repoInfo) {
    if (!$Dest) {
        $Dest = (Resolve-Path .).Path
    }

    $name = "$($repoInfo.Host)#$($repoInfo.User)#$($repoInfo.Proj)"
    $gitUrl = $repoInfo.GitUrl
    $command = "git clone --depth 1 $gitUrl $Dest\$name"
    Write-Host "Running '$command' ..." -ForegroundColor Green
    Invoke-Expression $command

} else {
    Write-Error "Unable parse git repo from url: $RepoUrl"
}