Powershell - Compare multiple files against single csv files - powershell

Question

I am trying to compare multiple files against a single document. I have managed to make that part work however where my issue is, is that i want to be able to check if the files exist before a comparison is run.
i.e. check if file A exists, if so compare against master csv file, if not continue on and check if file b exists, if so compare against master csv and so on.
my script so far goes:
$files = get-content -path "H:\Compare\File Location\servername Files.txt"
$prod = "H:\compare\Results\master_SystemInfo.csv"
foreach ($file in $files) {
If((Test-Path -path $file))
{
Write-Host "File exists, comparing against production"
$content1 = Get-Content "H:\Compare\Results\$file"
$content2 = Get-Content $prod
$comparedLines = Compare-Object $content1 $content2 -IncludeEqual |
Sort-Object { $_.InputObject.ReadCount }
$lineNumber = 0
$comparedLines | foreach {
$pattern = ".*"
if($_.SideIndicator -eq "==" -or $_.SideIndicator -eq "=>")
{
$lineNumber = $_.InputObject.ReadCount
}
if($_.InputObject -match $pattern)
{
if($_.SideIndicator -ne "==")
{
if($_.SideIndicator -eq "=>")
{
$lineOperation = "prod"
}
elseif($_.SideIndicator -eq "<=")
{
$lineOperation = "test"
}
[PSCustomObject] #{
Line = $lineNumber
File = $lineOperation
Text = $_.InputObject
}
}
}
} | Export-Csv "h:\compare\Comparison Reports\Prod.vs.$file" - NoTypeInformation
}
Else
{ "File does not exist, aborting" ; return}
}
The comparison is working just need to add the check for file before running comparison as it is still spitting out results for files that don't exist.
Thank you very much,

Answer 1

I have found the answer by altering the code, this time im just creating a txt file from the files in the folder first that way i don't need to test-path. This now generates a file list from the folder, then compares each file against the master file and outputs multiple files, one for each comparison saving it as the original filename i.e. "Prod.vs._SystemInfor.csv"
FYI - In the first line the abc123* is a variable i put in to look for specific server names within the folder and generate a file list based on those only. We have a number of servers all with similar naming conventions just the last 4 digits are different depending on where they are located.
Thanks
Working Powershell script:
Get-ChildItem -file abc123* H:\Compare\Results -Name | Out-File "H:\Compare\Results\Office Files.txt"
$officefiles = get-content -path "H:\Compare\results\Office Files.txt"
$officeprod = "H:\compare\Results\master_SystemInfo.csv"
foreach ($officefile in $officefiles) {
$content1 = Get-Content "H:\Compare\Results\$officefile"
$content2 = Get-Content $officeprod
$comparedLines = Compare-Object $content1 $content2 -IncludeEqual |
Sort-Object { $_.InputObject.ReadCount }
$lineNumber = 0
$comparedLines | foreach {
$pattern = ".*"
if($_.SideIndicator -eq "==" -or $_.SideIndicator -eq "=>")
{
$lineNumber = $_.InputObject.ReadCount
}
if($_.InputObject -match $pattern)
{
if($_.SideIndicator -ne "==")
{
if($_.SideIndicator -eq "=>")
{
$lineOperation = "prod"
}
elseif($_.SideIndicator -eq "<=")
{
$lineOperation = "test"
}
[PSCustomObject] #{
Line = $lineNumber
File = $lineOperation
Text = $_.InputObject
}
}
}
} | Export-Csv "h:\compare\Comparison Reports\Prod.vs.$officefile" -NoTypeInformation
}