The next script modifies one value in one section in an INI file. The INI filename stays the same. No input validation, no backup, no fancy command line parsing, no help, no nothing...
The regexp's are stolen from: https://devblogs.microsoft.com/scripting/use-powershell-to-work-with-any-ini-file/
<#
Script: modifyINI.ps1
Purpose: Change values in INI files
Date: 20-Oct-2022
Version: 0.1
Usage:
PS C:\> modifyINI.ps1 "INI file" "[Section]" "Key" "New value"
--- c:\temp\test.ini -------------------
[System]
Colors=256
memSize=20MB
cpuCores=4
----------------------------------------
PS C:\> modifyINI.ps1 "c:\temp\test.ini" "[System]" "memSize" "35MB"
--- c:\temp\test.ini -------------------
[System]
Colors=256
memSize=35MB
cpuCores=4
----------------------------------------
#>
if ($args.count -NE 4) {Exit}
$iniFile = $args[0]
$srcSection = $args[1]
$srcKey = $args[2]
$newVal = $args[3]
$tabChr = "" #--- Ident for val/var lines
$spaceChr = "" #--- Space before/after "=", for readability.
$section = $NULL
$srcFile = get-content $iniFile
$tmpFile = New-TemporaryFile
foreach ($line in $srcFile) {
$bareLine = $line.trim()
if ($bareLine -MATCH "^\[(.+)\]") { #--- [Section]...
$section = $bareLine
} ELSEIF ($bareLine -MATCH "(.+?)\s*=(.*)") { #--- key=val...
$key = $bareLine.split("=")[0].trim()
$val = $bareLine.split("=")[1].trim()
if (($srcSection -EQ $section) -AND ($srcKey -EQ $key)) {
$bareLine = "$tabChr$key$spaceChr=$spaceChr$newVal"
} ELSE {
$bareLine = "$tabChr$key$spaceChr=$spaceChr$val"
}
} #--- ELSE do nothing $bareLine...
write-output "$bareLine" | out-file $tmpFile -append
}
copy-item $tmpFile $iniFile -force
remove-item $tmpFile -force
