(PowerShell Core) find long lines within a git commit range

find-longlines.ps1

#!/usr/bin/env pwsh

[CmdletBinding()]
param (
    [Parameter(Mandatory=$true, Position=0)]
    $StartRef,

    [Parameter(Mandatory=$true, Position=1)]
    $EndRef,

    [ValidateRange(72, 132)]
    [int]$Cutoff = 88
)

cd $PSScriptRoot/..

$files = git --no-pager diff $StartRef $EndRef --name-only |
    % { $PWD.Path + '/' + $_ }

$commits = @{}
foreach($commitInfo in (git --no-pager log --pretty=format:'%h %s' "$StartRef...$EndRef")){
    $commits += (ConvertFrom-StringData $commitInfo -Delimiter ' ')
}

foreach ($file in $files) {
    $lineNum = 1
    $path = Resolve-Path $file -Relative
    $first = $true
    foreach ($line in (Get-Content $file)) {
        if ($line.Length -gt $Cutoff) {
            $commit = git --no-pager log --pretty=format:"%h %s" -n 1 -L $lineNum,+1:$file --no-patch
            $commit = $commit.Split(' ', 2)[0]

            if ($commit -notin $commits.Keys) {
               continue
            }

            if ($first) {
                $path
                $first = $false
            }

            "    line $lineNum is $($line.Length) chars:"
            "      $($line.Trim())"
            "    modified in:"
            "      $commit – $($commits[$commit])"
            ""
        }
        $lineNum++
    }
}