pull-repos.ps1

<#
.SYNOPSIS
	Pulls updates into Git repos
.DESCRIPTION
	This PowerShell script pulls updates into all Git repositories in a folder (including submodules).
.PARAMETER parentDir
	Specifies the path to the parent folder
.EXAMPLE
	PS> ./pull-repos C:\MyRepos
	⏳ Searching for Git executable...       git version 2.43.0
	⏳ Checking parent folder...             33 subfolders
	⏳ Pulling into 'base256U' (1/33)...
	...
.LINK
	https://github.com/fleschutz/PowerShell
.NOTES
	Author: Markus Fleschutz | License: CC0
#>

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

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

	Write-Host "⏳ Searching for Git executable...`t`t" -noNewline
	& git --version
	if ($lastExitCode -ne 0) { throw "Can't execute 'git' - make sure Git is installed and available" }

	Write-Host "⏳ Checking parent folder...`t`t`t" -noNewline
	if (-not(Test-Path "$parentDir" -pathType container)) { throw "Can't access folder: $parentDir" }
	$folders = (Get-ChildItem "$parentDir" -attributes Directory)
	$numFolders = $folders.Count
	$parentDirName = (Get-Item "$parentDir").Name
	Write-Host "$parentDir with $numFolders subfolders"

	[int]$step = 1
	[int]$numFailed = 0
	foreach ($folder in $folders) {
		$folderName = (Get-Item "$folder").Name
		Write-Host "⏳ Pulling into 📂$($folderName)...`t`t`t($step/$($numFolders)) " -noNewline

		& git -C "$folder" pull --recurse-submodules=yes
		if ($lastExitCode -ne 0) { $numFailed++; Write-Warning "'git pull' failed with exit code $lastExitCode" }

		& git -C "$folder" submodule update --init --recursive
		if ($lastExitCode -ne 0) { $numFailed++; Write-Warning "'git submodule update' failed with exit code $lastExitCode" }
		$step++
	}
	[int]$elapsed = $stopWatch.Elapsed.TotalSeconds
	if ($numFailed -eq 0) {
		"✅ $numFolders Git repos updated at $parentDir in $($elapsed)s."
		exit 0 # success
	} else {
		"⚠️ $numFolders Git repos updated at $parentDir but $numFailed FAILED (took $($elapsed)s)"
		exit 1
	}
} catch {
	"⚠️ ERROR: $($Error[0]) (script line $($_.InvocationInfo.ScriptLineNumber))"
	exit 1
}