Added the script in the correct path.

Scripts/SetDatastoreTag.ps1

@@ -0,0 +1,198 @@
+<#
+	.SYNOPSIS
+		A brief description of the  file.
+	
+	.DESCRIPTION
+		Given a list of Datastore Names, this script will assign a Tag to them
+	
+	.PARAMETER csvFile
+		String representing the full path of the file
+		The file must be structured like this:
+		-----------------------------
+		Tag1,Tag2,Tag3,Tag4
+		IPv4-iSCSI-SiteA,Tag1,Tag3
+		IPv4-NFS-SiteA,Tag2,Tag4
+		...
+		-----------------------------
+	
+	.NOTES
+		===========================================================================
+		Created on:   	31/03/2017 11:16
+		Created by:   	Alessio Rocchi <arocchi@vmware.com>
+		Organization: 	VMware
+		Filename:       SetDatastoreTag.ps1
+		===========================================================================
+#>
+[CmdletBinding()]
+param
+(
+	[Parameter(Mandatory = $true,
+			   ValueFromPipeline = $true)]
+	[ValidateNotNullOrEmpty()]
+	[System.String]$csvFile,
+	[Parameter(Mandatory = $true,
+			   ValueFromPipeline = $true)]
+	[ValidateNotNullOrEmpty()]
+	[String]$vCenter,
+	[Parameter(ValueFromPipeline = $true,
+			   Position = 2)]
+	[AllowNull()]
+	[String]$Username,
+	[Parameter(Position = 3)]
+	[AllowNull()]
+	[String]$Password
+)
+
+Import-Module -Name VMware.VimAutomation.Core -ErrorAction SilentlyContinue | Out-Null
+
+class vcConnector : System.IDisposable
+{
+	[String]$Username
+	[String]$Password
+	[String]$vCenter
+	[PSObject]$server
+	
+	static [vcConnector]$instance
+	
+	vcConnector($Username, $Password, $vCenter)
+	{
+		Import-Module -Name VMware.VimAutomation.Core -ErrorAction SilentlyContinue | Out-Null
+		
+		$this.Username = $Username
+		$this.Password = $Password
+		$this.vCenter = $vCenter
+		$this.connect()
+	}
+	
+	vcConnector($vcCredential, $vCenter)
+	{
+		Import-Module -Name VMware.VimAutomation.Core -ErrorAction SilentlyContinue | Out-Null
+		
+		$this.vcCredential = $vcCredential
+		$this.vCenter = $vCenter
+		$this.connect()
+	}
+	
+	[void] hidden connect()
+	{
+		try
+		{
+			if ([String]::IsNullOrEmpty($this.Username) -or [String]::IsNullOrEmpty($this.Password))
+			{
+				$vcCredential = Get-Credential
+				Connect-VIServer -Server $this.vCenter -Credential $this.vcCredential -WarningAction SilentlyContinue -ErrorAction Stop | Out-Null
+			}
+			else
+			{
+				Connect-VIServer -Server $this.vCenter -User $this.Username -Password $this.Password -WarningAction SilentlyContinue -ErrorAction Stop
+			}
+			Write-Debug("Connected to vCenter: {0}" -f $this.vCenter)
+		}
+		catch
+		{
+			Write-Error($Error[0].Exception.Message)
+			exit
+		}
+	}
+	
+	
+	[void] Dispose()
+	{
+		Write-Debug("Called Dispose Method of Instance: {0}" -f ($this))
+		Disconnect-VIServer -WarningAction SilentlyContinue -Server $this.vCenter -Force -Confirm:$false | Out-Null
+	}
+	
+	static [vcConnector] GetInstance()
+	{
+		if ([vcConnector]::instance -eq $null)
+		{
+			[vcConnector]::instance = [vcConnector]::new()
+		}
+		
+		return [vcConnector]::instance
+	}
+}
+
+class Content{
+	[System.Collections.Generic.List[System.String]]$availableTags
+	[System.Collections.Generic.List[System.String]]$elements
+	
+	Content()
+	{
+	}
+	
+	Content([String]$filePath)
+	{
+		if ((Test-Path -Path $filePath) -eq $false)
+		{
+			throw ("Cannot find file: {0}" -f ($filePath))
+		}
+		try
+		{
+			# Cast the Get-Content return type to Generic List of Strings in order to avoid fixed-size array
+			$this.elements = [System.Collections.Generic.List[System.String]](Get-Content -Path $filePath -ea SilentlyContinue -wa SilentlyContinue)
+			$this.availableTags = $this.elements[0].split(',')
+			# Delete the first element aka availableTags
+			$this.elements.RemoveAt(0)
+		}
+		catch
+		{
+			throw ("Error reading the file: {0}" -f ($filePath))
+		}
+	}
+}
+
+try
+{
+	$vc = [vcConnector]::new($Username, $Password, $vCenter)
+	$csvContent = [Content]::new($csvFile)
+	
+	Write-Host("Available Tags: {0}" -f ($csvContent.availableTags))
+
+	foreach ($element in $csvContent.elements)
+	{
+		[System.Collections.Generic.List[System.String]]$splittedList = $element.split(',')
+		# Get the Datastore Name
+		[System.String]$datastoreName = $splittedList[0]
+		# Removing Datastore Name
+		$splittedList.RemoveAt(0)
+		# Create a List of Tags which will be assigned to the Datastore
+		[System.Collections.Generic.List[PSObject]]$tagsToAssign = $splittedList | ForEach-Object { Get-Tag -Name $_ }
+		Write-Host("Tags to assign to Datastore: {0} are: {1}" -f ($datastoreName, $tagsToAssign))
+		# Get Datastore object by the given Datastore Name, first field of the the line
+		$datastore = Get-Datastore -Name $datastoreName -ea Stop
+		# Iterate the assigned Datastore Tags
+		foreach ($tag in ($datastore | Get-TagAssignment))
+		{
+			# Check if the current tag is one of the available ones.
+			if ($tag.Tag.Name -in $csvContent.availableTags)
+			{
+				# Remove the current assigned Tag
+				Write-Host("Removing Tag: {0}" -f ($tag))
+				Remove-TagAssignment -TagAssignment $tag -Confirm:$false
+			}
+		}
+		# Finally add the new set of tags to the Datastore
+		foreach ($tag in $tagsToAssign)
+		{
+			Write-Host("Trying to assign Tag: {0} to Datastore: {1}" -f ($tag.Name, $datastoreName))
+			# Assign the Tag
+			New-TagAssignment -Entity $datastore -Tag $tag
+		}		
+	}
+}
+catch [VMware.VimAutomation.Sdk.Types.V1.ErrorHandling.VimException.VimException]
+{
+	Write-Error("VIException: {0}" -f ($Error[0].Exception.Message))
+	exit
+}
+catch
+{
+	Write-Error $Error[0].Exception.Message
+	exit
+}
+finally
+{
+	# Let be assured that the vc connection will be disposed.
+	$vc.Dispose()
+}