[FIXED] Converting Powershell script to jenkins job

Issue

I have the following function:

function DivideAndCreateFiles ([string] $file, [string] $ruleName) {
    $Suffix = 0
    $FullData = Get-Content $file
    $MaxIP = 40
        
    while ($FullData.count -gt 0 ){
        $NewData = $FullData | Select-Object -First $MaxIP
        $FullData = $FullData | Select-Object -Skip $MaxIP
        $NewName = "$ruleName$Suffix"
        New-Variable -name $NewName -Value $NewData
        Get-Variable -name $NewName -ValueOnly  | out-file "$NewName.txt" 
        $Suffix++
    }
   
}

This function takes a file location, this file holds hundreds of ips. it then iterate the file and create files from it each one holding 40 ip's naming it $rulename$suffix so if $rulename=blabla

i would get blabla_0 , blabla_1, .. and so on, each with 40 ips.

i need to convert this logic and put it inside a jenkins job. this file is in the working dir of the job and is called ips.txt

suffix = 0
maxIP = 40
ips = readFile('ips.txt')

...

Id be very happy for some help here re-writing this function, im very new to jenkins / groovy

Thanks in advacne

Solution

You can achieve this easily using something like the following groovy code:

def divideAndCreateFiles(path, rule_name, init_suffix = 0, max_ip = 40){
    // read the file and split lines by new line separator
    def ips = readFile(path).split("\n").trim()   
  
    // divide the IPs into groups according to the maximum ip range          
    def ip_groups = ips.collate(ips.size().intdiv(max_ip))   
 
    // Iterate over all groups and write them to the corresponding file
    ip_groups.eachWithIndex { group, index ->
        writeFile file : "${rule_name}${init_suffix + index}", text: group.join("\n")
    }
}

From my perspective, because you are already writing a full pipeline in groovy, it is easier to handle all logic in groovy, including this function.

Answered By - Noam Helmer