extras: add PowerShell greeting port, Rust gm-switch and Windows installers
- powershell_greeting: PowerShell port of fish_greeting (fastfetch random logo, sixel/kitty-direct per terminal, logs, modes) - win-gm-switch: Rust port of gm-switch.cpp (cross-platform mode file, --status, Start Menu shortcuts installer) - install-windows.ps1 umbrella installer; README pointers
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# J621Greeting.ps1 - show a random J621 library image as the shell greeting.
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#
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# PowerShell port of extras/fish_greeting/fish_greeting.fish (the J621 REST
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# rewrite): asks GET /api/random/?fastfetch=1&rating=X for a random
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# png/jpg/gif, downloads the signed url and runs fastfetch with the image as
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# its logo. Based on the original script from
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# J621-Django/extras/fish_greeting system/fish_greeting.fish.
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#
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# Requires: fastfetch and curl.exe (ships with Windows 10 1803+).
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#
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# Rating modes (same file name as the fish version):
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# %APPDATA%\j621Greeting\greeting_mode 0 = NSFW (explicit)
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# 1 = SFW (safe)
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# 2 = Questionable (default)
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#
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# Configuration: %APPDATA%\j621Greeting\config.ps1 (sets environment
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# variables; see config.example.ps1):
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# J621_BASE API origin (default https://j621.rainbow-herring.ts.net)
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# J621_TOKEN API / scoped greeting token, sent as "Authorization: Token ..."
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# J621_WEB web origin used in the printed link (defaults to J621_BASE)
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# J621_FASTFETCH_CONFIG fastfetch config name (default "jake")
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# J621_MODE_FILE mode file override
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# J621_LOGO_TYPE force a fastfetch logo type (sixel, kitty-direct, ...)
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# J621_ALWAYS_FETCH=1 fetch even in terminals without image support
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# J621_LOGO_WIDTH logo width in columns (default 35)
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#Requires -Version 5.1
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function Get-J621FileKind {
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param([string]$Path)
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try {
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$stream = [IO.File]::OpenRead($Path)
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try {
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$buffer = New-Object byte[] 8
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$read = $stream.Read($buffer, 0, 8)
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if ($read -ge 4 -and $buffer[0] -eq 0x89 -and $buffer[1] -eq 0x50 -and $buffer[2] -eq 0x4E -and $buffer[3] -eq 0x47) { return 'png' }
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if ($read -ge 2 -and $buffer[0] -eq 0xFF -and $buffer[1] -eq 0xD8) { return 'jpeg' }
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if ($read -ge 3 -and $buffer[0] -eq 0x47 -and $buffer[1] -eq 0x49 -and $buffer[2] -eq 0x46) { return 'gif' }
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return 'unknown'
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} finally { $stream.Dispose() }
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} catch { return 'unknown' }
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}
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function Format-J621Accent {
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param([string]$Text)
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return "$([char]27)[4;2;38;2;138;0;222;49m$Text$([char]27)[0m"
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}
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function Format-J621Error {
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param([string]$Text)
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return "$([char]27)[31m$Text$([char]27)[0m"
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}
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function Get-J621FastfetchArgs {
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$configName = if ($env:J621_FASTFETCH_CONFIG) { $env:J621_FASTFETCH_CONFIG } else { 'jake' }
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$candidates = @(
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(Join-Path $env:APPDATA "fastfetch\$configName.jsonc"),
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(Join-Path $env:APPDATA "fastfetch\$configName\config.jsonc")
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)
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foreach ($candidate in $candidates) {
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if (Test-Path -LiteralPath $candidate) { return @('--config', $configName) }
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}
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return @()
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}
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function Show-J621Greeting {
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param([int]$Depth = 0)
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# --- Configuration ---
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$configFile = Join-Path $env:APPDATA 'j621Greeting\config.ps1'
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if (Test-Path -LiteralPath $configFile) { . $configFile }
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$base = if ($env:J621_BASE) { $env:J621_BASE.TrimEnd('/') } else { 'https://j621.rainbow-herring.ts.net' }
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$webBase = if ($env:J621_WEB) { $env:J621_WEB.TrimEnd('/') } else { $base }
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$token = $env:J621_TOKEN
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$logoWidth = if ($env:J621_LOGO_WIDTH) { $env:J621_LOGO_WIDTH } else { '35' }
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$modeFile = if ($env:J621_MODE_FILE) { $env:J621_MODE_FILE } else { Join-Path $env:APPDATA 'j621Greeting\greeting_mode' }
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# --- Setup logging ---
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$logDir = Join-Path $env:APPDATA 'j621Logos'
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$logFile = Join-Path $logDir 'logs.log'
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if (-not (Test-Path -LiteralPath $logDir)) { New-Item -ItemType Directory -Path $logDir -Force | Out-Null }
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$stamp = (Get-Date).ToString('yyyy-MM-dd HH:mm:ss')
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# --- Mode selection ---
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$mode = '2'
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if (Test-Path -LiteralPath $modeFile) {
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$raw = Get-Content -LiteralPath $modeFile -Raw -ErrorAction SilentlyContinue
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if ($null -ne $raw) { $mode = $raw.Trim() }
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}
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switch ($mode) {
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'0' { $rating = 'e'; $modeName = 'NSFW' }
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'1' { $rating = 's'; $modeName = 'SFW' }
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'2' { $rating = 'q'; $modeName = 'Questionable' }
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default { Write-Output 'Unknown mode, using default NSFW'; $rating = 'e'; $modeName = 'NSFW' }
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}
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# --- Pick the image protocol for this terminal ---
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$logoType = $env:J621_LOGO_TYPE
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if (-not $logoType) {
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if ($env:WT_SESSION) { $logoType = 'sixel' }
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elseif ($env:WEZTERM_PANE) { $logoType = 'kitty-direct' }
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}
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$fetchImage = [bool]$logoType -or ($env:J621_ALWAYS_FETCH -eq '1')
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$ffArgs = @(Get-J621FastfetchArgs)
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if (-not $fetchImage) {
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# Terminal without image support (e.g. VS Code): plain fastfetch.
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& fastfetch @ffArgs
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return
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}
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# --- Ask the API for a random image (JSON with a signed URL) ---
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$apiUrl = "$base/api/random/?fastfetch=1&rating=$rating"
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$curlArgs = @('-s', '-L', '--max-time', '20')
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if ($token) { $curlArgs += @('-H', "Authorization: Token $token") }
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$json = & curl.exe @curlArgs $apiUrl 2>$null | Out-String
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$data = $null
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try { $data = $json | ConvertFrom-Json } catch { $data = $null }
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$imageUrl = $null; $jId = $null; $md5 = $null; $filename = $null; $detail = $null; $ext = 'img'
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if ($data) {
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if ($data.url) { $imageUrl = [string]$data.url }
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if ($data.j_id) { $jId = [string]$data.j_id }
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if ($data.md5) { $md5 = [string]$data.md5 }
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if ($data.filename) { $filename = [string]$data.filename }
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if ($data.detail) { $detail = [string]$data.detail }
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if ($data.extension) { $ext = [string]$data.extension }
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}
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if ($ext -notmatch '^[A-Za-z0-9]+$') { $ext = 'img' }
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if (-not $imageUrl) {
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& fastfetch @ffArgs
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if ($detail) { Write-Host (Format-J621Accent "No logo ($detail)") } else { Write-Host (Format-J621Accent 'No logo (API error)') }
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Add-Content -LiteralPath $logFile -Value "$stamp No logo for rating=${rating}: $detail"
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return
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}
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# --- Download the signed image ---
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$tempFile = Join-Path ([IO.Path]::GetTempPath()) ('j621_logo_' + [guid]::NewGuid().ToString('N') + '.' + $ext)
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$downloadSuccess = $false
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& curl.exe -s -L --max-time 60 -o $tempFile $imageUrl 2>$null
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if ($LASTEXITCODE -eq 0 -and (Test-Path -LiteralPath $tempFile) -and (Get-Item -LiteralPath $tempFile).Length -gt 0) { $downloadSuccess = $true }
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if (-not $downloadSuccess) {
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& fastfetch @ffArgs
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Write-Host (Format-J621Accent 'No logo (download failed)')
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Add-Content -LiteralPath $logFile -Value "$stamp Download failed for $jId"
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Remove-Item -LiteralPath $tempFile -ErrorAction SilentlyContinue
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return
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}
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# --- Accept only PNG, JPEG, GIF; anything else causes one more roll ---
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$kind = Get-J621FileKind -Path $tempFile
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if ($kind -eq 'unknown') {
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if ($Depth -lt 3) {
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Show-J621Greeting -Depth ($Depth + 1)
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} else {
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Write-Host (Format-J621Error 'Max recursion depth reached, skipping unsupported file type: unknown')
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}
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if ($Depth -eq 0) {
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Write-Host (Format-J621Error ("Forked (Got unsupported type: unknown - $filename)"))
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if ($md5) { Write-Output "Link: $webBase/view/$md5" }
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}
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Remove-Item -LiteralPath $tempFile -ErrorAction SilentlyContinue
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return
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}
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# --- Display result ---
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if ($logoType) {
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& fastfetch @ffArgs --logo-type $logoType --logo $tempFile --logo-width $logoWidth
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} else {
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& fastfetch @ffArgs
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}
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Add-Content -LiteralPath $logFile -Value "$stamp Downloaded: $jId $filename [$modeName]"
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if ($filename) {
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Write-Host (Format-J621Accent "Logo from API: $filename ($modeName, $jId)")
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Write-Output "Link: $webBase/detail/$jId"
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} else {
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Write-Host (Format-J621Accent "Logo from API ($modeName)")
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}
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# --- Keep only the last 1000 lines of the log ---
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$lines = @(Get-Content -LiteralPath $logFile -Tail 1000)
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Set-Content -LiteralPath $logFile -Value $lines
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# --- Cleanup ---
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Remove-Item -LiteralPath $tempFile -ErrorAction SilentlyContinue
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}
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