PowerShell script that iterates over all .meta files in the given directory (defaults to the parent working directory) to scan for duplicate GUIDs.

duplicate-guids-finder.ps1

param (
    [Parameter(Position = 0)]
    [string]$FolderPath = $pwd.Path
)

Write-Host "Scanning for duplicate GUIDs. Please wait..."

# Find all .meta files recursively within the specified folder
$metaFiles = Get-ChildItem -Path $FolderPath -Filter "*.meta" -Recurse

# Loop through each .meta file and extract the GUIDs into an array
$guids = @()
foreach ($file in $metaFiles) {
    try {
        $content = Get-Content -LiteralPath $file.FullName
        foreach ($line in $content) {
            if ($line -match "^guid: ([0-9a-fA-F]{32})$") {
                $guids += $Matches[1]
            }
        }
    }
    catch {
        Write-Warning "Error reading file: $($file.FullName): $($_.Exception.Message)"
    }
}

# Group the GUIDs and count occurrences
$groupedGuids = $guids | Group-Object

# Output duplicate GUIDs
$foundDuplicates = $false
foreach ($group in $groupedGuids) {
    if ($group.Count -gt 1) {
        Write-Host "Duplicate GUID: $($group.Name) (Count: $($group.Count))" -ForegroundColor Red
        $foundDuplicates = $true
    }
}

# If there were none, output that instead!
if (-not $foundDuplicates) {
    Write-Host "No duplicate GUIDs were found."
}

Example output:

Scanning for duplicate GUIDs. Please wait...
Duplicate GUID: cb3892a2411d7d74284ba952f374ca45 (Count: 2)

You can then use grep or similar tools to find the files or folders that have the duplicate GUIDs. For example, in a git repository you can run:

git grep --recurse-submodules cb3892a2411d7d74284ba952f374ca45 *.meta