Modify and ZIP file in one statement

Question

PSVersion 5.1.18362.2212

I would like to know if it is possible to read in a set of text files, modify their content and their filenames and store the results directly into a ZIP file?

The following reads text files in and modifies them, storing the change into a new file:

$xSource = "sourcefile.json"
$xTarget = "targetfile.json"
$replacement = "abc"
(Get-Content $xSource) | Foreach-Object {
  $_.replace('[XX]', $replacement).`
} | Set-Content -path $xTarget

Is it possible to modify this to store the target file directly into a ZIP file?

I was hoping something like the following would work, but I am unsure of how I can pass the new filename through to the ZIP? or whether the following works at all?

$xSource = "sourcefile.json"
$xTarget = "targetfile.json"
$xTargetZip = "target.zip"
$replacement = "abc"
(Get-Content $xSource) | Foreach-Object {
  $_.replace('[XX]', $replacement).`
} | Compress-Archive -Update -DestinationPath $xTargetZip

I get the impression that I would need to store the target files into a temporary folder and then pack them from there ... is there any way of avoiding a temporary folder?

Thanks in advance for any and all help.

Are you looking to do this only for one file or multiple files? This definitely can't be done without prior writing to a file using `Compress-Archive` but it can be done with .NET Apis — Santiago Squarzon, Jul 04 '22 at 18:31
Hi @SantiagoSquarzon multiple source files into a single ZIP file — Eric, Jul 04 '22 at 18:40

Santiago Squarzon · Accepted Answer · 2022-07-05T11:38:44.907

The solution to this is cumbersome but you asked for it, this is how you can write entries to a zip file without prior writing the updates of your Jsons to new files, in other words, having the contents of the files in memory and writing them to a zip entry.

References for the .NET Docs used here:

using namespace System.IO
using namespace System.IO.Compression

Add-Type -AssemblyName System.IO.Compression

try {    
    # be aware, DO NOT use relative paths here!
    $DestinationPath = 'path\to\test.zip'
    $destfs = [File]::Open($DestinationPath, [FileMode]::CreateNew)
    $zip    = [ZipArchive]::new($destfs, [ZipArchiveMode]::Update)

    Get-ChildItem -Path path\to\jsonfolder -Filter *.json | ForEach-Object {
        # `OpenText` uses UTF8 encoding, normally there shouldn't be any issues here
        # but you can also use `Get-Content` instead to get the file content
        $reader    = $_.OpenText()
        $content   = $reader.ReadToEnd() -replace 'hello', 'world'
        # this is yours to define, this is how each entry should be named
        $entryName = $_.BaseName + '-ToBeDetermined' + $_.Extension
        $zipEntry  = $zip.CreateEntry($entryName)
        $zipStream = $zipEntry.Open()
        $writer    = [StreamWriter]::new($zipStream)
        $writer.Write($content)
        $writer, $reader, $zipStream | ForEach-Object 'Dispose'
    }
}
finally {
    $zip, $destfs | ForEach-Object 'Dispose'
}

Thank you. Not at all cumbersome, and a few minor adjustments to match my requirements and now it works like a charm! :) — Eric, Jul 05 '22 at 07:15

Modify and ZIP file in one statement

1 Answers1