<#
.SYNOPSIS
	clone-repos.ps1 [<parent-dir>]
.DESCRIPTION
	Clones well-known Git repositories under the current/given directory.
.EXAMPLE
	PS> .\clone-repos.ps1 C:\MyRepos
.NOTES
	Author: Markus Fleschutz · License: CC0
.LINK
	https://github.com/fleschutz/PowerShell
#>

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

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

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

	$Null = (git --version)
	if ($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 "$ParentDir/$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 "$URL" "$ParentDir/$FolderName"
		} else {
			"🢃 Cloning to 📂$FolderName, $Branch branch, full history..."
			& git clone --branch "$Branch" --recurse-submodules "$URL" "$ParentDir/$FolderName"
		}
		if ($lastExitCode -ne "0") { throw "'git clone $URL' failed" }
		$Count++
	}
	[int]$Elapsed = $StopWatch.Elapsed.TotalSeconds
	"✔️ cloned $Count Git repositories at 📂$ParentDir in $Elapsed sec"
	exit 0
} catch {
	write-error "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
	exit 1
}