Count lines of code between commits with wildcard ignores

Ignored Files.txt

*.txt
a/b/*.txt
*.xml
*.csproj

loc.ps1

<#
.NOTES 
    Name: loc.ps1 
    Author: Ranveer Aggarwal 

.SYNOPSIS 
    A script to count the lines of code change between two commits with wildcard ignores.

.DESCRIPTION 
    Run like ./loc.ps1 -ignoreFile path/to/ignore_file.txt -repository path/to/repository -commit1 commit_1_sha -commit2 commit_2_sha
#>

Param (
    [String]$ignoreFile = "",
    [String]$repository = ".",
    [String]$commit1 = "",
    [String]$commit2 = ""
)

# Get ignored wildcards
if ($ignoreFile.Equals("")){}
else{
    $ignores = (Get-Content $ignoreFile | Out-String).Split("`n")
}

# Change to repository's location
Set-Location -Path $repository

# Get the changed files
$outputs = git diff --numstat $commit1 $commit2 | Out-String
$outputs = $outputs.Split("`n")

# Get list of changed filenames and changed lines
$fileLines = New-Object System.Collections.Generic.List[System.Object]

foreach($changedFile in $outputs) {
    if ($changedFile.Equals("")){}
    else {
        $filename = $changedFile.Split("`t")[2].TrimEnd()
        $addedLines = $changedFile.Split("`t")[0]
        if ($addedLines.Equals("-")) {
            $addedLines = 0
        }
        $removedLines = $changedFile.Split("`t")[1]
        if ($removedLines.Equals("-")) {
            $removedLines = 0
        }
        $fileLines.Add(($filename, $addedLines, $removedLines))
    }
}

$ignoredLines = 0

foreach ($fileLine in $fileLines.ToArray()) {
    foreach ($ignore in $ignores) {
        if ($fileLine[0] -like $ignore.Trim()) {
            $ignoredLines += $fileLine[1]
            $ignoredLines += $fileLine[2]
        }    
    }
}

# Count total lines
$totalLines = 0

foreach ($fileLine in $fileLines.ToArray()) {
    $totalLines += $fileLine[1]
    $totalLines += $fileLine[2]
}

# Print Final Output
Write-Host ($totalLines-$ignoredLines)