<#
.SYNOPSIS
	Clones well-known Git repositories into a folder
.DESCRIPTION
	This script clones well-known Git repositories into a folder.
.PARAMETER folder
	Specifies the target folder
.EXAMPLE
	PS> ./clone-repos C:\Users\Markus\Repos
.NOTES
	Author: Markus Fleschutz · License: CC0
.LINK
	https://github.com/fleschutz/PowerShell
#>

param([string]$folder = "$PWD")

try {
	$StopWatch = [system.diagnostics.stopwatch]::startNew()

	if (-not(test-path "$folder" -pathType container)) { throw "Can't access directory: $folder" }

	$Null = (git --version)
	if ($lastExitCode -ne "0") { throw "Can't execute 'git' - make sure Git is installed and available" }

	$Table = import-csv "$PSScriptRoot/../Data/git-repos.csv"
	$TableCount = $Table.count
	"Found $TableCount entries in Data/git-repos.csv database..."

	[int]$Count = 0
	foreach($Row in $Table) {
		[string]$FolderName = $Row.FolderName
		[string]$Branch = $Row.Branch
		[string]$Shallow = $Row.Shallow
		[string]$URL = $Row.URL

		if (test-path "$folder/$FolderName" -pathType container) {
			"📂$FolderName exists, skipping..."
			continue
		}
		if ($Shallow -eq "yes") {
			"🢃 Cloning to 📂$FolderName, $Branch branch, shallow..."
			& git clone --branch "$Branch" --depth 1 --shallow-submodules --recurse-submodules "$URL" "$folder/$FolderName"
		} else {
			"🢃 Cloning to 📂$FolderName, $Branch branch, full history..."
			& git clone --branch "$Branch" --recurse-submodules "$URL" "$folder/$FolderName"
		}
		if ($lastExitCode -ne "0") { throw "'git clone $URL' failed" }
		$Count++
	}
	[int]$Elapsed = $StopWatch.Elapsed.TotalSeconds
	"✔️ cloned $Count Git repositories into 📂$folder in $Elapsed sec"
	exit 0 # success
} catch {
	"⚠️ Error: $($Error[0]) ($($MyInvocation.MyCommand.Name):$($_.InvocationInfo.ScriptLineNumber))"
	exit 1
}