PowerShell modify_ script

[jeandeaual]

I'm having trouble writing a modify_ script in PowerShell.
Basically I'd like to get the contents of the source file into a variable to then modify it. This can be done in a modify_*.sh script as follows:

var="$(cat <&0)"

For PowerShell, I tried doing:

$var = while ($line = Read-Host) { $line }

The issue is that this seems to also output the file contents at the same time, resulting in the output file containing both the unmodified and modified contents.

Does anyone have a working sample of a modify_*.ps1 script?

[bradenhilton]

See https://stackoverflow.com/a/66550241/11000543 regarding Read-Host.

I can't remember off the top of my head if $input/$($input)/@($input) works in the context of a chezmoi modify_ script. Feel free to try it.

At the moment I'm using this:

function Read-FileFromStdin {
    $stdin = [System.Console]::In

    $allLines = @()
    while ($line = $stdin.ReadLine()) {
        $allLines += $line
    } 

    if (-not $allLines) {
        return $null
    }

    return $allLines -join [System.Environment]::NewLine
}

$CurrentFileContents = Read-FileFromStdin

You can also just directly read the file contents if you want:

function Read-FileFromPath {
    $filePath = "your/path/here"

    if (-not (Test-Path -Path $filePath)) {
        return $null
    }

    $allLines = Get-Content -Path $filePath -ErrorAction 'SilentlyContinue'

    if (-not $allLines) {
        return $null
    }

    return $allLines -join [System.Environment]::NewLine
}

$CurrentFileContents = Read-FileFromPath

[jeandeaual]

I couldn't use $input but your function works wonders. Thanks!