mirror of
https://github.com/unslothai/unsloth
synced 2026-04-21 13:37:39 +00:00
d6aff00de3
install.ps1 now stages a standalone unsloth.exe in $LOCALAPPDATA\Unsloth Studio\bin and prepends that dir to user PATH so the running launcher during `unsloth studio update` lives outside the venv. setup.ps1 gains an idempotent migration path that parks any pre-existing locked venv launcher (MoveFileEx-allowed) before uv runs and syncs the standalone copy afterwards via SHA256 compare.
997 lines
44 KiB
PowerShell
997 lines
44 KiB
PowerShell
# Unsloth Studio Installer for Windows PowerShell
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# Usage: irm https://raw.githubusercontent.com/unslothai/unsloth/main/install.ps1 | iex
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# Local: Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass; .\install.ps1 --local
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# NoTorch: .\install.ps1 --no-torch (skip PyTorch, GGUF-only mode)
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# Test: .\install.ps1 --package roland-sloth
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function Install-UnslothStudio {
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$ErrorActionPreference = "Stop"
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$script:UnslothVerbose = ($env:UNSLOTH_VERBOSE -eq "1")
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# ── Parse flags ──
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$StudioLocalInstall = $false
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$PackageName = "unsloth"
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$RepoRoot = ""
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$SkipTorch = $false
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$argList = $args
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for ($i = 0; $i -lt $argList.Count; $i++) {
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switch ($argList[$i]) {
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"--local" { $StudioLocalInstall = $true }
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"--no-torch" { $SkipTorch = $true }
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"--verbose" { $script:UnslothVerbose = $true }
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"-v" { $script:UnslothVerbose = $true }
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"--package" {
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$i++
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if ($i -ge $argList.Count) {
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Write-Host "[ERROR] --package requires an argument." -ForegroundColor Red
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return
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}
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$PackageName = $argList[$i]
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}
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}
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}
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# Propagate to child processes so they also respect verbose mode.
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# Process-scoped -- does not persist.
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if ($script:UnslothVerbose) {
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$env:UNSLOTH_VERBOSE = '1'
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}
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if ($StudioLocalInstall) {
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$RepoRoot = (Resolve-Path (Split-Path -Parent $PSCommandPath)).Path
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if (-not (Test-Path (Join-Path $RepoRoot "pyproject.toml"))) {
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Write-Host "[ERROR] --local must be run from the unsloth repo root (pyproject.toml not found at $RepoRoot)" -ForegroundColor Red
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return
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}
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}
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$PythonVersion = "3.13"
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$StudioHome = Join-Path $env:USERPROFILE ".unsloth\studio"
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$VenvDir = Join-Path $StudioHome "unsloth_studio"
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$Rule = [string]::new([char]0x2500, 52)
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$Sloth = [char]::ConvertFromUtf32(0x1F9A5)
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function Enable-StudioVirtualTerminal {
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if ($env:NO_COLOR) { return $false }
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try {
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if (-not ("StudioVT.Native" -as [type])) {
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Add-Type -Namespace StudioVT -Name Native -MemberDefinition @'
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[DllImport("kernel32.dll")] public static extern IntPtr GetStdHandle(int nStdHandle);
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[DllImport("kernel32.dll")] public static extern bool GetConsoleMode(IntPtr h, out uint m);
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[DllImport("kernel32.dll")] public static extern bool SetConsoleMode(IntPtr h, uint m);
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'@ -ErrorAction Stop
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}
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$h = [StudioVT.Native]::GetStdHandle(-11)
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[uint32]$mode = 0
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if (-not [StudioVT.Native]::GetConsoleMode($h, [ref]$mode)) { return $false }
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$mode = $mode -bor 0x0004
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return [StudioVT.Native]::SetConsoleMode($h, $mode)
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} catch {
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return $false
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}
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}
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$script:StudioVtOk = Enable-StudioVirtualTerminal
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function Get-StudioAnsi {
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param(
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[Parameter(Mandatory = $true)]
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[ValidateSet('Title', 'Dim', 'Ok', 'Warn', 'Err', 'Reset')]
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[string]$Kind
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)
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$e = [char]27
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switch ($Kind) {
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'Title' { return "${e}[38;5;150m" }
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'Dim' { return "${e}[38;5;245m" }
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'Ok' { return "${e}[38;5;108m" }
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'Warn' { return "${e}[38;5;136m" }
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'Err' { return "${e}[91m" }
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'Reset' { return "${e}[0m" }
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}
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}
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Write-Host ""
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if ($script:StudioVtOk -and -not $env:NO_COLOR) {
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Write-Host (" " + (Get-StudioAnsi Title) + $Sloth + " Unsloth Studio Installer (Windows)" + (Get-StudioAnsi Reset))
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Write-Host (" {0}{1}{2}" -f (Get-StudioAnsi Dim), $Rule, (Get-StudioAnsi Reset))
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} else {
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Write-Host (" {0} Unsloth Studio Installer (Windows)" -f $Sloth) -ForegroundColor DarkGreen
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Write-Host " $Rule" -ForegroundColor DarkGray
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}
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Write-Host ""
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# ── Helper: refresh PATH from registry (deduplicating entries) ──
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function Refresh-SessionPath {
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$machine = [System.Environment]::GetEnvironmentVariable("Path", "Machine")
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$user = [System.Environment]::GetEnvironmentVariable("Path", "User")
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$merged = "$machine;$user;$env:Path"
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$seen = @{}
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$unique = @()
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foreach ($p in $merged -split ";") {
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$key = $p.TrimEnd("\").ToLowerInvariant()
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if ($key -and -not $seen.ContainsKey($key)) {
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$seen[$key] = $true
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$unique += $p
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}
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}
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$env:Path = $unique -join ";"
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}
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function step {
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param(
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[Parameter(Mandatory = $true)][string]$Label,
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[Parameter(Mandatory = $true)][string]$Value,
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[string]$Color = "Green"
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)
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if ($script:StudioVtOk -and -not $env:NO_COLOR) {
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$dim = Get-StudioAnsi Dim
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$rst = Get-StudioAnsi Reset
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$val = switch ($Color) {
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'Green' { Get-StudioAnsi Ok }
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'Yellow' { Get-StudioAnsi Warn }
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'Red' { Get-StudioAnsi Err }
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'DarkGray' { Get-StudioAnsi Dim }
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default { Get-StudioAnsi Ok }
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}
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$padded = if ($Label.Length -ge 15) { $Label.Substring(0, 15) } else { $Label.PadRight(15) }
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Write-Host (" {0}{1}{2}{3}{4}{2}" -f $dim, $padded, $rst, $val, $Value)
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} else {
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$padded = if ($Label.Length -ge 15) { $Label.Substring(0, 15) } else { $Label.PadRight(15) }
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Write-Host (" {0}" -f $padded) -NoNewline -ForegroundColor DarkGray
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$fc = switch ($Color) {
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'Green' { 'DarkGreen' }
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'Yellow' { 'Yellow' }
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'Red' { 'Red' }
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'DarkGray' { 'DarkGray' }
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default { 'DarkGreen' }
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}
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Write-Host $Value -ForegroundColor $fc
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}
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}
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function substep {
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param(
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[Parameter(Mandatory = $true)][string]$Message,
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[string]$Color = "DarkGray"
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)
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if ($script:StudioVtOk -and -not $env:NO_COLOR) {
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$msgCol = switch ($Color) {
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'Yellow' { (Get-StudioAnsi Warn) }
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'Red' { (Get-StudioAnsi Err) }
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default { (Get-StudioAnsi Dim) }
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}
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$pad = "".PadRight(15)
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Write-Host (" {0}{1}{2}{3}" -f $msgCol, $pad, $Message, (Get-StudioAnsi Reset))
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} else {
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$fc = switch ($Color) {
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'Yellow' { 'Yellow' }
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'Red' { 'Red' }
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default { 'DarkGray' }
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}
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Write-Host (" {0,-15}{1}" -f "", $Message) -ForegroundColor $fc
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}
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}
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# Run native commands quietly by default to match install.sh behavior.
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# Full command output is shown only when --verbose / UNSLOTH_VERBOSE=1.
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function Invoke-InstallCommand {
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param(
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[Parameter(Mandatory = $true)][ScriptBlock]$Command
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)
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$prevEap = $ErrorActionPreference
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$ErrorActionPreference = "Continue"
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try {
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# Reset to avoid stale values from prior native commands.
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$global:LASTEXITCODE = 0
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if ($script:UnslothVerbose) {
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# Merge stderr into stdout so progress/warning output stays visible
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# without flipping $? on successful native commands (PS 5.1 treats
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# stderr records as errors that set $? = $false even on exit code 0).
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& $Command 2>&1 | Out-Host
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} else {
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$output = & $Command 2>&1 | Out-String
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if ($LASTEXITCODE -ne 0) {
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Write-Host $output -ForegroundColor Red
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}
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}
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return [int]$LASTEXITCODE
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} finally {
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$ErrorActionPreference = $prevEap
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}
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}
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function New-StudioShortcuts {
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param(
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[Parameter(Mandatory = $true)][string]$UnslothExePath
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)
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if (-not (Test-Path $UnslothExePath)) {
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substep "cannot create shortcuts, unsloth.exe not found at $UnslothExePath" "Yellow"
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return
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}
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try {
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# Persist an absolute path in launcher scripts so shortcut working
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# directory changes do not break process startup.
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$UnslothExePath = (Resolve-Path $UnslothExePath).Path
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# Escape for single-quoted embedding in generated launcher script.
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# This prevents runtime variable expansion for paths containing '$'.
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$SingleQuotedExePath = $UnslothExePath -replace "'", "''"
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$localAppDataDir = $env:LOCALAPPDATA
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if (-not $localAppDataDir -or [string]::IsNullOrWhiteSpace($localAppDataDir)) {
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substep "LOCALAPPDATA path unavailable; skipped shortcut creation" "Yellow"
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return
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}
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$appDir = Join-Path $localAppDataDir "Unsloth Studio"
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$launcherPs1 = Join-Path $appDir "launch-studio.ps1"
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$launcherVbs = Join-Path $appDir "launch-studio.vbs"
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$desktopDir = [Environment]::GetFolderPath("Desktop")
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$desktopLink = if ($desktopDir -and $desktopDir.Trim()) {
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Join-Path $desktopDir "Unsloth Studio.lnk"
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} else {
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$null
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}
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$startMenuDir = if ($env:APPDATA -and $env:APPDATA.Trim()) {
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Join-Path $env:APPDATA "Microsoft\Windows\Start Menu\Programs"
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} else {
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$null
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}
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$startMenuLink = if ($startMenuDir -and $startMenuDir.Trim()) {
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Join-Path $startMenuDir "Unsloth Studio.lnk"
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} else {
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$null
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}
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if (-not $desktopLink) {
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substep "Desktop path unavailable; skipped desktop shortcut creation" "Yellow"
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}
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if (-not $startMenuLink) {
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substep "APPDATA/Start Menu path unavailable; skipped Start menu shortcut creation" "Yellow"
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}
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$iconPath = Join-Path $appDir "unsloth.ico"
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$bundledIcon = $null
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if ($PSScriptRoot -and $PSScriptRoot.Trim()) {
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$bundledIcon = Join-Path $PSScriptRoot "studio\frontend\public\unsloth.ico"
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}
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$iconUrl = "https://raw.githubusercontent.com/unslothai/unsloth/main/studio/frontend/public/unsloth.ico"
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if (-not (Test-Path $appDir)) {
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New-Item -ItemType Directory -Path $appDir -Force | Out-Null
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}
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$launcherContent = @"
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`$ErrorActionPreference = 'Stop'
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`$basePort = 8888
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`$maxPortOffset = 20
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`$timeoutSec = 60
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`$pollIntervalMs = 1000
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function Test-StudioHealth {
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param([Parameter(Mandatory = `$true)][int]`$Port)
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try {
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`$url = "http://127.0.0.1:`$Port/api/health"
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`$resp = Invoke-RestMethod -Uri `$url -TimeoutSec 1 -Method Get
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return (`$resp -and `$resp.status -eq 'healthy' -and `$resp.service -eq 'Unsloth UI Backend')
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} catch {
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return `$false
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}
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}
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function Get-CandidatePorts {
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# Fast path: only probe base port + currently listening ports in range.
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`$ports = @(`$basePort)
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try {
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`$maxPort = `$basePort + `$maxPortOffset
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`$listening = Get-NetTCPConnection -State Listen -ErrorAction Stop |
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Where-Object { `$_.LocalPort -ge `$basePort -and `$_.LocalPort -le `$maxPort } |
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Select-Object -ExpandProperty LocalPort
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`$ports = (@(`$basePort) + `$listening) | Sort-Object -Unique
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} catch {
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Write-Host "[DEBUG] Get-NetTCPConnection failed: `$(`$_.Exception.Message). Falling back to full port scan." -ForegroundColor DarkGray
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# Fallback when Get-NetTCPConnection is unavailable/restricted.
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for (`$offset = 1; `$offset -le `$maxPortOffset; `$offset++) {
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`$ports += (`$basePort + `$offset)
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}
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}
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return `$ports
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}
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function Find-HealthyStudioPort {
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foreach (`$candidate in (Get-CandidatePorts)) {
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if (Test-StudioHealth -Port `$candidate) {
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return `$candidate
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}
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}
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return `$null
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}
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function Test-PortBusy {
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param([Parameter(Mandatory = `$true)][int]`$Port)
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`$listener = `$null
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try {
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`$listener = [System.Net.Sockets.TcpListener]::new([System.Net.IPAddress]::Any, `$Port)
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`$listener.Start()
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return `$false
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} catch {
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return `$true
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} finally {
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if (`$listener) { try { `$listener.Stop() } catch {} }
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}
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}
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function Find-FreeLaunchPort {
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`$maxPort = `$basePort + `$maxPortOffset
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try {
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`$listening = Get-NetTCPConnection -State Listen -ErrorAction Stop |
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Where-Object { `$_.LocalPort -ge `$basePort -and `$_.LocalPort -le `$maxPort } |
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Select-Object -ExpandProperty LocalPort
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for (`$offset = 0; `$offset -le `$maxPortOffset; `$offset++) {
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`$candidate = `$basePort + `$offset
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if (`$candidate -notin `$listening) {
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return `$candidate
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}
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}
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} catch {
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# Get-NetTCPConnection unavailable or restricted; probe ports directly
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for (`$offset = 0; `$offset -le `$maxPortOffset; `$offset++) {
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`$candidate = `$basePort + `$offset
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if (-not (Test-PortBusy -Port `$candidate)) {
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return `$candidate
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}
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}
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}
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return `$null
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}
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# If Studio is already healthy on any expected port, just open it and exit.
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`$existingPort = Find-HealthyStudioPort
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if (`$existingPort) {
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Start-Process "http://localhost:`$existingPort"
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exit 0
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}
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`$launchMutex = [System.Threading.Mutex]::new(`$false, 'Local\UnslothStudioLauncher')
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`$haveMutex = `$false
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try {
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try {
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`$haveMutex = `$launchMutex.WaitOne(0)
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} catch [System.Threading.AbandonedMutexException] {
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`$haveMutex = `$true
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}
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if (-not `$haveMutex) {
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# Another launcher is already running; wait for it to bring Studio up
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`$deadline = (Get-Date).AddSeconds(`$timeoutSec)
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while ((Get-Date) -lt `$deadline) {
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`$port = Find-HealthyStudioPort
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if (`$port) { Start-Process "http://localhost:`$port"; exit 0 }
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Start-Sleep -Milliseconds `$pollIntervalMs
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}
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exit 0
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}
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`$powershellExe = Join-Path `$env:SystemRoot 'System32\WindowsPowerShell\v1.0\powershell.exe'
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`$studioExe = '$SingleQuotedExePath'
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`$launchPort = Find-FreeLaunchPort
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if (-not `$launchPort) {
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`$msg = "No free port found in range `$basePort-`$(`$basePort + `$maxPortOffset)"
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try {
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Add-Type -AssemblyName System.Windows.Forms -ErrorAction Stop
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[System.Windows.Forms.MessageBox]::Show(`$msg, 'Unsloth Studio') | Out-Null
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} catch {}
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exit 1
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}
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`$studioCommand = '& "' + `$studioExe + '" studio -H 0.0.0.0 -p ' + `$launchPort
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`$launchArgs = @(
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'-NoExit',
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'-NoProfile',
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'-ExecutionPolicy',
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'Bypass',
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'-Command',
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`$studioCommand
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)
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try {
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`$proc = Start-Process -FilePath `$powershellExe -ArgumentList `$launchArgs -WorkingDirectory `$env:USERPROFILE -PassThru
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} catch {
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`$msg = "Could not launch Unsloth Studio terminal.`n`nError: `$(`$_.Exception.Message)"
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try {
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Add-Type -AssemblyName System.Windows.Forms -ErrorAction Stop
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[System.Windows.Forms.MessageBox]::Show(`$msg, 'Unsloth Studio') | Out-Null
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} catch {}
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exit 1
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}
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`$browserOpened = `$false
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`$deadline = (Get-Date).AddSeconds(`$timeoutSec)
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while ((Get-Date) -lt `$deadline) {
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`$healthyPort = Find-HealthyStudioPort
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if (`$healthyPort) {
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Start-Process "http://localhost:`$healthyPort"
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`$browserOpened = `$true
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break
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}
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if (`$proc.HasExited) { break }
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Start-Sleep -Milliseconds `$pollIntervalMs
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}
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if (-not `$browserOpened) {
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if (`$proc.HasExited) {
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`$msg = "Unsloth Studio exited before becoming healthy. Check terminal output for errors."
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} else {
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`$msg = "Unsloth Studio is still starting but did not become healthy within `$timeoutSec seconds. Check the terminal window for the selected port and open it manually."
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}
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try {
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Add-Type -AssemblyName System.Windows.Forms -ErrorAction Stop
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[System.Windows.Forms.MessageBox]::Show(`$msg, 'Unsloth Studio') | Out-Null
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} catch {}
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}
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} finally {
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if (`$haveMutex) { `$launchMutex.ReleaseMutex() | Out-Null }
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`$launchMutex.Dispose()
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}
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exit 0
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"@
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# Write UTF-8 with BOM for reliable decoding by Windows PowerShell 5.1,
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# even when install.ps1 is executed from PowerShell 7.
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$utf8Bom = New-Object System.Text.UTF8Encoding($true)
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[System.IO.File]::WriteAllText($launcherPs1, $launcherContent, $utf8Bom)
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$vbsContent = @"
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Set shell = CreateObject("WScript.Shell")
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cmd = "powershell -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -File ""$launcherPs1"""
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shell.Run cmd, 0, False
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"@
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# WSH handles UTF-16LE reliably for .vbs files with non-ASCII paths.
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Set-Content -Path $launcherVbs -Value $vbsContent -Encoding Unicode -Force
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# Prefer bundled icon from local clone/dev installs.
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# If not available, best-effort download from raw GitHub.
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# We only attach the icon if the resulting file has a valid ICO header.
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$hasValidIcon = $false
|
|
if ($bundledIcon -and (Test-Path $bundledIcon)) {
|
|
try {
|
|
Copy-Item -Path $bundledIcon -Destination $iconPath -Force
|
|
} catch {
|
|
Write-Host "[DEBUG] Error copying bundled icon: $($_.Exception.Message)" -ForegroundColor DarkGray
|
|
}
|
|
} elseif (-not (Test-Path $iconPath)) {
|
|
try {
|
|
Invoke-WebRequest -Uri $iconUrl -OutFile $iconPath -UseBasicParsing
|
|
} catch {
|
|
Write-Host "[DEBUG] Error downloading icon: $($_.Exception.Message)" -ForegroundColor DarkGray
|
|
}
|
|
}
|
|
|
|
if (Test-Path $iconPath) {
|
|
try {
|
|
$bytes = [System.IO.File]::ReadAllBytes($iconPath)
|
|
if (
|
|
$bytes.Length -ge 4 -and
|
|
$bytes[0] -eq 0 -and
|
|
$bytes[1] -eq 0 -and
|
|
$bytes[2] -eq 1 -and
|
|
$bytes[3] -eq 0
|
|
) {
|
|
$hasValidIcon = $true
|
|
} else {
|
|
Remove-Item $iconPath -Force -ErrorAction SilentlyContinue
|
|
}
|
|
} catch {
|
|
Write-Host "[DEBUG] Error validating or removing icon: $($_.Exception.Message)" -ForegroundColor DarkGray
|
|
Remove-Item $iconPath -Force -ErrorAction SilentlyContinue
|
|
}
|
|
}
|
|
|
|
$wscriptExe = Join-Path $env:SystemRoot "System32\wscript.exe"
|
|
$shortcutArgs = "//B //Nologo `"$launcherVbs`""
|
|
|
|
try {
|
|
$wshell = New-Object -ComObject WScript.Shell
|
|
$createdShortcutCount = 0
|
|
foreach ($linkPath in @($desktopLink, $startMenuLink)) {
|
|
if (-not $linkPath -or [string]::IsNullOrWhiteSpace($linkPath)) { continue }
|
|
try {
|
|
$shortcut = $wshell.CreateShortcut($linkPath)
|
|
$shortcut.TargetPath = $wscriptExe
|
|
$shortcut.Arguments = $shortcutArgs
|
|
$shortcut.WorkingDirectory = $appDir
|
|
$shortcut.Description = "Launch Unsloth Studio"
|
|
if ($hasValidIcon) {
|
|
$shortcut.IconLocation = "$iconPath,0"
|
|
}
|
|
$shortcut.Save()
|
|
$createdShortcutCount++
|
|
} catch {
|
|
substep "could not create shortcut at ${linkPath}: $($_.Exception.Message)" "Yellow"
|
|
}
|
|
}
|
|
if ($createdShortcutCount -gt 0) {
|
|
substep "Created Unsloth Studio shortcut"
|
|
} else {
|
|
substep "no Unsloth Studio shortcuts were created" "Yellow"
|
|
}
|
|
} catch {
|
|
substep "shortcut creation unavailable: $($_.Exception.Message)" "Yellow"
|
|
}
|
|
} catch {
|
|
substep "shortcut setup failed; skipping shortcuts: $($_.Exception.Message)" "Yellow"
|
|
}
|
|
}
|
|
|
|
# ── Check winget ──
|
|
if (-not (Get-Command winget -ErrorAction SilentlyContinue)) {
|
|
step "winget" "not available" "Red"
|
|
substep "Install it from https://aka.ms/getwinget" "Yellow"
|
|
substep "or install Python $PythonVersion and uv manually, then re-run." "Yellow"
|
|
return
|
|
}
|
|
|
|
# ── Helper: detect a working Python 3.11-3.13 on the system ──
|
|
# Returns the version string (e.g. "3.13") or "" if none found.
|
|
# Uses try-catch + stderr redirection so that App Execution Alias stubs
|
|
# (WindowsApps) and other non-functional executables are probed safely
|
|
# without triggering $ErrorActionPreference = "Stop".
|
|
#
|
|
# Skips Anaconda/Miniconda Python: conda-bundled CPython ships modified
|
|
# DLL search paths that break torch's c10.dll loading on Windows.
|
|
# Standalone CPython (python.org, winget, uv) does not have this issue.
|
|
#
|
|
# NOTE: A venv created from conda Python inherits conda's base_prefix
|
|
# even if the venv path does not contain "conda". We check both the
|
|
# executable path AND sys.base_prefix to catch this.
|
|
$script:CondaSkipPattern = '(?i)(conda|miniconda|anaconda|miniforge|mambaforge)'
|
|
|
|
function Test-IsCondaPython {
|
|
param([string]$Exe)
|
|
if ($Exe -match $script:CondaSkipPattern) { return $true }
|
|
try {
|
|
$basePrefix = (& $Exe -c "import sys; print(sys.base_prefix)" 2>$null | Out-String).Trim()
|
|
if ($basePrefix -match $script:CondaSkipPattern) { return $true }
|
|
} catch { }
|
|
return $false
|
|
}
|
|
|
|
# Returns @{ Version = "3.13"; Path = "C:\...\python.exe" } or $null.
|
|
# The resolved Path is passed to `uv venv --python` to prevent uv from
|
|
# re-resolving the version string back to a conda interpreter.
|
|
function Find-CompatiblePython {
|
|
# Try the Python Launcher first (most reliable on Windows)
|
|
# py.exe resolves to the standard CPython install, not conda.
|
|
$pyLauncher = Get-Command py -CommandType Application -ErrorAction SilentlyContinue
|
|
if ($pyLauncher -and $pyLauncher.Source -notmatch $script:CondaSkipPattern) {
|
|
foreach ($minor in @("3.13", "3.12", "3.11")) {
|
|
try {
|
|
$out = & $pyLauncher.Source "-$minor" --version 2>&1 | Out-String
|
|
if ($out -match "Python (3\.1[1-3])\.\d+") {
|
|
$ver = $Matches[1]
|
|
# Resolve the actual executable path and verify it is not conda-based
|
|
$resolvedExe = (& $pyLauncher.Source "-$minor" -c "import sys; print(sys.executable)" 2>$null | Out-String).Trim()
|
|
if ($resolvedExe -and (Test-Path $resolvedExe) -and -not (Test-IsCondaPython $resolvedExe)) {
|
|
return @{ Version = $ver; Path = $resolvedExe }
|
|
}
|
|
}
|
|
} catch {}
|
|
}
|
|
}
|
|
# Try python3 / python via Get-Command -All to look past stubs that
|
|
# might shadow a real Python further down PATH.
|
|
# Skip WindowsApps entries: the App Execution Alias stubs live there
|
|
# and can open the Microsoft Store as a side effect. Legitimate Store
|
|
# Python is already detected via the py launcher above (Store packages
|
|
# include py since Python 3.11).
|
|
# Skip Anaconda/Miniconda: check both path and sys.base_prefix.
|
|
foreach ($name in @("python3", "python")) {
|
|
foreach ($cmd in @(Get-Command $name -All -ErrorAction SilentlyContinue)) {
|
|
if (-not $cmd.Source) { continue }
|
|
if ($cmd.Source -like "*\WindowsApps\*") { continue }
|
|
if (Test-IsCondaPython $cmd.Source) { continue }
|
|
try {
|
|
$out = & $cmd.Source --version 2>&1 | Out-String
|
|
if ($out -match "Python (3\.1[1-3])\.\d+") {
|
|
return @{ Version = $Matches[1]; Path = $cmd.Source }
|
|
}
|
|
} catch {}
|
|
}
|
|
}
|
|
return $null
|
|
}
|
|
|
|
# ── Install Python if no compatible version (3.11-3.13) found ──
|
|
# Find-CompatiblePython returns @{ Version = "3.13"; Path = "C:\...\python.exe" } or $null.
|
|
$DetectedPython = Find-CompatiblePython
|
|
if ($DetectedPython) {
|
|
step "python" "Python $($DetectedPython.Version) already installed"
|
|
}
|
|
if (-not $DetectedPython) {
|
|
substep "installing Python ${PythonVersion}..."
|
|
$pythonPackageId = "Python.Python.$PythonVersion"
|
|
# Temporarily lower ErrorActionPreference so that winget stderr
|
|
# (progress bars, warnings) does not become a terminating error
|
|
# on PowerShell 5.1 where native-command stderr is ErrorRecord.
|
|
$prevEAP = $ErrorActionPreference
|
|
$ErrorActionPreference = "Continue"
|
|
try {
|
|
winget install -e --id $pythonPackageId --accept-package-agreements --accept-source-agreements
|
|
$wingetExit = $LASTEXITCODE
|
|
} catch { $wingetExit = 1 }
|
|
$ErrorActionPreference = $prevEAP
|
|
Refresh-SessionPath
|
|
|
|
# Re-detect after install (PATH may have changed)
|
|
$DetectedPython = Find-CompatiblePython
|
|
|
|
if (-not $DetectedPython) {
|
|
# Python still not functional after winget -- force reinstall.
|
|
# This handles both real failures AND "already installed" codes where
|
|
# winget thinks Python is present but it's not actually on PATH
|
|
# (e.g. user partially uninstalled, or installed via a different method).
|
|
substep "Python not found on PATH after winget. Retrying with --force..." "Yellow"
|
|
$ErrorActionPreference = "Continue"
|
|
try {
|
|
winget install -e --id $pythonPackageId --accept-package-agreements --accept-source-agreements --force
|
|
$wingetExit = $LASTEXITCODE
|
|
} catch { $wingetExit = 1 }
|
|
$ErrorActionPreference = $prevEAP
|
|
Refresh-SessionPath
|
|
$DetectedPython = Find-CompatiblePython
|
|
}
|
|
|
|
if (-not $DetectedPython) {
|
|
Write-Host "[ERROR] Python installation failed (exit code $wingetExit)" -ForegroundColor Red
|
|
Write-Host " Please install Python $PythonVersion manually from https://www.python.org/downloads/" -ForegroundColor Yellow
|
|
Write-Host " Make sure to check 'Add Python to PATH' during installation." -ForegroundColor Yellow
|
|
Write-Host " Then re-run this installer." -ForegroundColor Yellow
|
|
return
|
|
}
|
|
}
|
|
|
|
# ── Install uv if not present ──
|
|
if (-not (Get-Command uv -ErrorAction SilentlyContinue)) {
|
|
substep "installing uv package manager..."
|
|
$prevEAP = $ErrorActionPreference
|
|
$ErrorActionPreference = "Continue"
|
|
try { winget install --id=astral-sh.uv -e --accept-package-agreements --accept-source-agreements } catch {}
|
|
$ErrorActionPreference = $prevEAP
|
|
Refresh-SessionPath
|
|
# Fallback: if winget didn't put uv on PATH, try the PowerShell installer
|
|
if (-not (Get-Command uv -ErrorAction SilentlyContinue)) {
|
|
substep "trying alternative uv installer..." "Yellow"
|
|
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"
|
|
Refresh-SessionPath
|
|
}
|
|
}
|
|
|
|
if (-not (Get-Command uv -ErrorAction SilentlyContinue)) {
|
|
step "uv" "could not be installed" "Red"
|
|
substep "Install it from https://docs.astral.sh/uv/" "Yellow"
|
|
return
|
|
}
|
|
|
|
# ── Create venv (migrate old layout if possible, otherwise fresh) ──
|
|
# Pass the resolved executable path to uv so it does not re-resolve
|
|
# a version string back to a conda interpreter.
|
|
if (-not (Test-Path $StudioHome)) {
|
|
New-Item -ItemType Directory -Path $StudioHome -Force | Out-Null
|
|
}
|
|
|
|
$VenvPython = Join-Path $VenvDir "Scripts\python.exe"
|
|
$_Migrated = $false
|
|
|
|
if (Test-Path $VenvPython) {
|
|
# New layout already exists -- nuke for fresh install
|
|
substep "removing existing environment for fresh install..."
|
|
Remove-Item -Recurse -Force $VenvDir
|
|
} elseif (Test-Path (Join-Path $StudioHome ".venv\Scripts\python.exe")) {
|
|
# Old layout (~/.unsloth/studio/.venv) exists -- validate before migrating
|
|
$OldVenv = Join-Path $StudioHome ".venv"
|
|
$OldPy = Join-Path $OldVenv "Scripts\python.exe"
|
|
substep "found legacy Studio environment, validating..."
|
|
$prevEAP2 = $ErrorActionPreference
|
|
$ErrorActionPreference = "Continue"
|
|
try {
|
|
& $OldPy -c "import torch; A = torch.ones((2,2)); B = A + A" 2>$null | Out-Null
|
|
$torchOk = ($LASTEXITCODE -eq 0)
|
|
} catch { $torchOk = $false }
|
|
$ErrorActionPreference = $prevEAP2
|
|
if ($torchOk) {
|
|
substep "legacy environment is healthy -- migrating..."
|
|
Move-Item -Path $OldVenv -Destination $VenvDir -Force
|
|
substep "moved .venv -> unsloth_studio"
|
|
$_Migrated = $true
|
|
} else {
|
|
substep "legacy environment failed validation -- creating fresh environment" "Yellow"
|
|
Remove-Item -Recurse -Force $OldVenv -ErrorAction SilentlyContinue
|
|
}
|
|
} elseif (Test-Path (Join-Path $env:USERPROFILE "unsloth_studio\Scripts\python.exe")) {
|
|
# CWD-relative venv from old install.ps1 -- migrate to absolute path
|
|
$CwdVenv = Join-Path $env:USERPROFILE "unsloth_studio"
|
|
substep "found CWD-relative Studio environment, migrating to $VenvDir..."
|
|
Move-Item -Path $CwdVenv -Destination $VenvDir -Force
|
|
substep "moved ~/unsloth_studio -> ~/.unsloth/studio/unsloth_studio"
|
|
$_Migrated = $true
|
|
}
|
|
|
|
if (-not (Test-Path $VenvPython)) {
|
|
step "venv" "creating Python $($DetectedPython.Version) virtual environment"
|
|
substep "$VenvDir"
|
|
$venvExit = Invoke-InstallCommand { uv venv $VenvDir --python "$($DetectedPython.Path)" }
|
|
if ($venvExit -ne 0) {
|
|
Write-Host "[ERROR] Failed to create virtual environment (exit code $venvExit)" -ForegroundColor Red
|
|
return
|
|
}
|
|
} else {
|
|
step "venv" "using migrated environment"
|
|
substep "$VenvDir"
|
|
}
|
|
|
|
# ── Detect GPU (robust: PATH + hardcoded fallback paths, mirrors setup.ps1) ──
|
|
$HasNvidiaSmi = $false
|
|
$NvidiaSmiExe = $null
|
|
try {
|
|
$nvSmiCmd = Get-Command nvidia-smi -ErrorAction SilentlyContinue
|
|
if ($nvSmiCmd) {
|
|
& $nvSmiCmd.Source *> $null
|
|
if ($LASTEXITCODE -eq 0) { $HasNvidiaSmi = $true; $NvidiaSmiExe = $nvSmiCmd.Source }
|
|
}
|
|
} catch {}
|
|
if (-not $HasNvidiaSmi) {
|
|
foreach ($p in @(
|
|
"$env:ProgramFiles\NVIDIA Corporation\NVSMI\nvidia-smi.exe",
|
|
"$env:SystemRoot\System32\nvidia-smi.exe"
|
|
)) {
|
|
if (Test-Path $p) {
|
|
try {
|
|
& $p *> $null
|
|
if ($LASTEXITCODE -eq 0) { $HasNvidiaSmi = $true; $NvidiaSmiExe = $p; break }
|
|
} catch {}
|
|
}
|
|
}
|
|
}
|
|
if ($HasNvidiaSmi) {
|
|
step "gpu" "NVIDIA GPU detected"
|
|
} else {
|
|
step "gpu" "none (chat-only / GGUF)" "Yellow"
|
|
substep "Training and GPU inference require an NVIDIA GPU with drivers installed." "Yellow"
|
|
}
|
|
|
|
# ── Choose the correct PyTorch index URL based on driver CUDA version ──
|
|
# Mirrors Get-PytorchCudaTag in setup.ps1.
|
|
function Get-TorchIndexUrl {
|
|
$baseUrl = if ($env:UNSLOTH_PYTORCH_MIRROR) { $env:UNSLOTH_PYTORCH_MIRROR.TrimEnd('/') } else { "https://download.pytorch.org/whl" }
|
|
if (-not $NvidiaSmiExe) { return "$baseUrl/cpu" }
|
|
try {
|
|
$output = & $NvidiaSmiExe 2>&1 | Out-String
|
|
if ($output -match 'CUDA Version:\s+(\d+)\.(\d+)') {
|
|
$major = [int]$Matches[1]; $minor = [int]$Matches[2]
|
|
if ($major -ge 13) { return "$baseUrl/cu130" }
|
|
if ($major -eq 12 -and $minor -ge 8) { return "$baseUrl/cu128" }
|
|
if ($major -eq 12 -and $minor -ge 6) { return "$baseUrl/cu126" }
|
|
if ($major -ge 12) { return "$baseUrl/cu124" }
|
|
if ($major -ge 11) { return "$baseUrl/cu118" }
|
|
return "$baseUrl/cpu"
|
|
}
|
|
} catch {}
|
|
substep "could not determine CUDA version from nvidia-smi, defaulting to cu126" "Yellow"
|
|
return "$baseUrl/cu126"
|
|
}
|
|
$TorchIndexUrl = Get-TorchIndexUrl
|
|
|
|
# ── Print CPU-only hint when no GPU detected ──
|
|
if (-not $SkipTorch -and $TorchIndexUrl -like "*/cpu") {
|
|
Write-Host ""
|
|
substep "No NVIDIA GPU detected." "Yellow"
|
|
substep "Installing CPU-only PyTorch. If you only need GGUF chat/inference," "Yellow"
|
|
substep "re-run with --no-torch for a faster, lighter install:" "Yellow"
|
|
substep ".\install.ps1 --no-torch" "Yellow"
|
|
Write-Host ""
|
|
}
|
|
|
|
# ── Install PyTorch first, then unsloth separately ──
|
|
#
|
|
# Why two steps?
|
|
# `uv pip install unsloth --torch-backend=cpu` on Windows resolves to
|
|
# unsloth==2024.8 (a pre-CLI release with no unsloth.exe) because the
|
|
# cpu-only solver cannot satisfy newer unsloth's dependencies.
|
|
# Installing torch first from the explicit CUDA index, then upgrading
|
|
# unsloth in a second step, avoids this solver dead-end.
|
|
#
|
|
# Why --upgrade-package instead of --upgrade?
|
|
# `--upgrade unsloth` re-resolves ALL dependencies including torch,
|
|
# pulling torch from default PyPI and stripping the +cuXXX suffix
|
|
# that step 1 installed (e.g. torch 2.5.1+cu124 -> 2.10.0 with no
|
|
# CUDA suffix). `--upgrade-package unsloth` upgrades ONLY unsloth
|
|
# to the latest version while preserving the already-pinned torch
|
|
# CUDA wheels. Missing dependencies (transformers, trl, peft, etc.)
|
|
# are still pulled in because they are new, not upgrades.
|
|
#
|
|
# ── Helper: find no-torch-runtime.txt ──
|
|
function Find-NoTorchRuntimeFile {
|
|
if ($StudioLocalInstall -and (Test-Path (Join-Path $RepoRoot "studio\backend\requirements\no-torch-runtime.txt"))) {
|
|
return Join-Path $RepoRoot "studio\backend\requirements\no-torch-runtime.txt"
|
|
}
|
|
$installed = Get-ChildItem -Path $VenvDir -Recurse -Filter "no-torch-runtime.txt" -ErrorAction SilentlyContinue |
|
|
Where-Object { $_.FullName -like "*studio*backend*requirements*no-torch-runtime.txt" } |
|
|
Select-Object -ExpandProperty FullName -First 1
|
|
return $installed
|
|
}
|
|
|
|
if ($_Migrated) {
|
|
# Migrated env: force-reinstall unsloth+unsloth-zoo to ensure clean state
|
|
# in the new venv location, while preserving existing torch/CUDA
|
|
substep "upgrading unsloth in migrated environment..."
|
|
if ($SkipTorch) {
|
|
# No-torch: install unsloth + unsloth-zoo with --no-deps, then
|
|
# runtime deps (typer, safetensors, transformers, etc.) with --no-deps.
|
|
$baseInstallExit = Invoke-InstallCommand { uv pip install --python $VenvPython --no-deps --reinstall-package unsloth --reinstall-package unsloth-zoo "unsloth>=2026.4.5" unsloth-zoo }
|
|
if ($baseInstallExit -eq 0) {
|
|
$NoTorchReq = Find-NoTorchRuntimeFile
|
|
if ($NoTorchReq) {
|
|
$baseInstallExit = Invoke-InstallCommand { uv pip install --python $VenvPython --no-deps -r $NoTorchReq }
|
|
}
|
|
}
|
|
} else {
|
|
$baseInstallExit = Invoke-InstallCommand { uv pip install --python $VenvPython --reinstall-package unsloth --reinstall-package unsloth-zoo "unsloth>=2026.4.5" unsloth-zoo }
|
|
}
|
|
if ($baseInstallExit -ne 0) {
|
|
Write-Host "[ERROR] Failed to install unsloth (exit code $baseInstallExit)" -ForegroundColor Red
|
|
return
|
|
}
|
|
if ($StudioLocalInstall) {
|
|
substep "overlaying local repo (editable)..."
|
|
$overlayExit = Invoke-InstallCommand { uv pip install --python $VenvPython -e $RepoRoot --no-deps }
|
|
if ($overlayExit -ne 0) {
|
|
Write-Host "[ERROR] Failed to overlay local repo (exit code $overlayExit)" -ForegroundColor Red
|
|
return
|
|
}
|
|
}
|
|
} elseif ($TorchIndexUrl) {
|
|
if ($SkipTorch) {
|
|
substep "skipping PyTorch (--no-torch flag set)." "Yellow"
|
|
} else {
|
|
substep "installing PyTorch ($TorchIndexUrl)..."
|
|
$torchInstallExit = Invoke-InstallCommand { uv pip install --python $VenvPython "torch>=2.4,<2.11.0" torchvision torchaudio --index-url $TorchIndexUrl }
|
|
if ($torchInstallExit -ne 0) {
|
|
Write-Host "[ERROR] Failed to install PyTorch (exit code $torchInstallExit)" -ForegroundColor Red
|
|
return
|
|
}
|
|
}
|
|
|
|
substep "installing unsloth (this may take a few minutes)..."
|
|
if ($SkipTorch) {
|
|
# No-torch: install unsloth + unsloth-zoo with --no-deps, then
|
|
# runtime deps (typer, safetensors, transformers, etc.) with --no-deps.
|
|
$baseInstallExit = Invoke-InstallCommand { uv pip install --python $VenvPython --no-deps --upgrade-package unsloth --upgrade-package unsloth-zoo "unsloth>=2026.4.5" unsloth-zoo }
|
|
if ($baseInstallExit -eq 0) {
|
|
$NoTorchReq = Find-NoTorchRuntimeFile
|
|
if ($NoTorchReq) {
|
|
$baseInstallExit = Invoke-InstallCommand { uv pip install --python $VenvPython --no-deps -r $NoTorchReq }
|
|
}
|
|
}
|
|
} elseif ($StudioLocalInstall) {
|
|
$baseInstallExit = Invoke-InstallCommand { uv pip install --python $VenvPython --upgrade-package unsloth "unsloth>=2026.4.5" unsloth-zoo }
|
|
} else {
|
|
$baseInstallExit = Invoke-InstallCommand { uv pip install --python $VenvPython --upgrade-package unsloth "$PackageName" }
|
|
}
|
|
if ($baseInstallExit -ne 0) {
|
|
Write-Host "[ERROR] Failed to install unsloth (exit code $baseInstallExit)" -ForegroundColor Red
|
|
return
|
|
}
|
|
|
|
if ($StudioLocalInstall) {
|
|
substep "overlaying local repo (editable)..."
|
|
$overlayExit = Invoke-InstallCommand { uv pip install --python $VenvPython -e $RepoRoot --no-deps }
|
|
if ($overlayExit -ne 0) {
|
|
Write-Host "[ERROR] Failed to overlay local repo (exit code $overlayExit)" -ForegroundColor Red
|
|
return
|
|
}
|
|
}
|
|
} else {
|
|
# Fallback: GPU detection failed to produce a URL -- let uv resolve torch
|
|
substep "installing unsloth (this may take a few minutes)..."
|
|
if ($StudioLocalInstall) {
|
|
$baseInstallExit = Invoke-InstallCommand { uv pip install --python $VenvPython unsloth-zoo "unsloth>=2026.4.5" --torch-backend=auto }
|
|
if ($baseInstallExit -ne 0) {
|
|
Write-Host "[ERROR] Failed to install unsloth (exit code $baseInstallExit)" -ForegroundColor Red
|
|
return
|
|
}
|
|
substep "overlaying local repo (editable)..."
|
|
$overlayExit = Invoke-InstallCommand { uv pip install --python $VenvPython -e $RepoRoot --no-deps }
|
|
if ($overlayExit -ne 0) {
|
|
Write-Host "[ERROR] Failed to overlay local repo (exit code $overlayExit)" -ForegroundColor Red
|
|
return
|
|
}
|
|
} else {
|
|
$baseInstallExit = Invoke-InstallCommand { uv pip install --python $VenvPython "$PackageName" --torch-backend=auto }
|
|
if ($baseInstallExit -ne 0) {
|
|
Write-Host "[ERROR] Failed to install unsloth (exit code $baseInstallExit)" -ForegroundColor Red
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
# ── Stage standalone launcher outside the venv ──
|
|
# Copying the distlib-generated unsloth.exe to $LOCALAPPDATA\Unsloth Studio\bin
|
|
# (and prepending that dir to User PATH) means future `unsloth studio update`
|
|
# invocations run from the standalone copy, so pip/uv can freely rewrite
|
|
# the venv's in-use Scripts\unsloth.exe during dependency upgrades.
|
|
$VenvScriptsExe = Join-Path $VenvDir "Scripts\unsloth.exe"
|
|
$StandaloneBinDir = Join-Path $env:LOCALAPPDATA "Unsloth Studio\bin"
|
|
$StandaloneExe = Join-Path $StandaloneBinDir "unsloth.exe"
|
|
if (Test-Path $VenvScriptsExe) {
|
|
if (-not (Test-Path $StandaloneBinDir)) {
|
|
New-Item -ItemType Directory -Force $StandaloneBinDir | Out-Null
|
|
}
|
|
try { Copy-Item -LiteralPath $VenvScriptsExe -Destination $StandaloneExe -Force } catch {}
|
|
$_userPath = [System.Environment]::GetEnvironmentVariable("Path", "User")
|
|
if (-not $_userPath -or $_userPath -notlike "*$StandaloneBinDir*") {
|
|
$_newPath = if ($_userPath) { "$StandaloneBinDir;$_userPath" } else { $StandaloneBinDir }
|
|
[System.Environment]::SetEnvironmentVariable("Path", $_newPath, "User")
|
|
Refresh-SessionPath
|
|
}
|
|
}
|
|
|
|
# ── Run studio setup ──
|
|
# setup.ps1 will handle installing Git, CMake, Visual Studio Build Tools,
|
|
# CUDA Toolkit, Node.js, and other dependencies automatically via winget.
|
|
step "setup" "running unsloth studio setup..."
|
|
# Prefer the standalone launcher (so the running .exe is not inside the venv)
|
|
# and fall back to the venv copy if the staging step above did not succeed.
|
|
$UnslothExe = if (Test-Path $StandaloneExe) { $StandaloneExe } else { $VenvScriptsExe }
|
|
if (-not (Test-Path $UnslothExe)) {
|
|
Write-Host "[ERROR] unsloth CLI was not installed correctly." -ForegroundColor Red
|
|
Write-Host " Expected: $UnslothExe" -ForegroundColor Yellow
|
|
Write-Host " This usually means an older unsloth version was installed that does not include the Studio CLI." -ForegroundColor Yellow
|
|
Write-Host " Try re-running the installer or see: https://github.com/unslothai/unsloth?tab=readme-ov-file#-quickstart" -ForegroundColor Yellow
|
|
return
|
|
}
|
|
# Tell setup.ps1 to skip base package installation (install.ps1 already did it)
|
|
$env:SKIP_STUDIO_BASE = "1"
|
|
$env:STUDIO_PACKAGE_NAME = $PackageName
|
|
$env:UNSLOTH_NO_TORCH = if ($SkipTorch) { "true" } else { "false" }
|
|
# Always set STUDIO_LOCAL_INSTALL explicitly to avoid stale values from
|
|
# a previous --local run in the same PowerShell session.
|
|
if ($StudioLocalInstall) {
|
|
$env:STUDIO_LOCAL_INSTALL = "1"
|
|
$env:STUDIO_LOCAL_REPO = $RepoRoot
|
|
} else {
|
|
$env:STUDIO_LOCAL_INSTALL = "0"
|
|
Remove-Item Env:STUDIO_LOCAL_REPO -ErrorAction SilentlyContinue
|
|
}
|
|
# Use 'studio setup' (not 'studio update') because 'update' pops
|
|
# SKIP_STUDIO_BASE, which would cause redundant package reinstallation
|
|
# and bypass the fast-path version check from PR #4667.
|
|
$studioArgs = @('studio', 'setup')
|
|
if ($script:UnslothVerbose) { $studioArgs += '--verbose' }
|
|
& $UnslothExe @studioArgs
|
|
$setupExit = $LASTEXITCODE
|
|
if ($setupExit -ne 0) {
|
|
Write-Host "[ERROR] unsloth studio setup failed (exit code $setupExit)" -ForegroundColor Red
|
|
return
|
|
}
|
|
|
|
New-StudioShortcuts -UnslothExePath $UnslothExe
|
|
|
|
# ── Add venv Scripts dir to User PATH so `unsloth studio` works from any terminal ──
|
|
$ScriptsDir = Join-Path $VenvDir "Scripts"
|
|
$UserPath = [System.Environment]::GetEnvironmentVariable("Path", "User")
|
|
if (-not $UserPath -or $UserPath -notlike "*$ScriptsDir*") {
|
|
if ($UserPath) {
|
|
[System.Environment]::SetEnvironmentVariable("Path", "$ScriptsDir;$UserPath", "User")
|
|
} else {
|
|
[System.Environment]::SetEnvironmentVariable("Path", "$ScriptsDir", "User")
|
|
}
|
|
Refresh-SessionPath
|
|
step "path" "added unsloth to PATH"
|
|
}
|
|
|
|
# Launch studio automatically in interactive terminals;
|
|
# in non-interactive environments (CI, Docker) just print instructions.
|
|
$IsInteractive = [Environment]::UserInteractive -and (-not [Console]::IsInputRedirected)
|
|
if ($IsInteractive) {
|
|
& $UnslothExe studio -H 0.0.0.0 -p 8888
|
|
} else {
|
|
step "launch" "manual commands:"
|
|
substep "& `"$VenvDir\Scripts\Activate.ps1`""
|
|
substep "unsloth studio -H 0.0.0.0 -p 8888"
|
|
Write-Host ""
|
|
}
|
|
}
|
|
|
|
Install-UnslothStudio @args
|