ollama source for Momentry Core verification
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Accusys
323
scripts/install.ps1
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323
scripts/install.ps1
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<#
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.SYNOPSIS
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Install, upgrade, or uninstall Ollama on Windows.
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.DESCRIPTION
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Downloads and installs Ollama.
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Quick install:
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irm https://ollama.com/install.ps1 | iex
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Specific version:
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$env:OLLAMA_VERSION="0.5.7"; irm https://ollama.com/install.ps1 | iex
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Custom install directory:
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$env:OLLAMA_INSTALL_DIR="D:\Ollama"; irm https://ollama.com/install.ps1 | iex
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Uninstall:
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$env:OLLAMA_UNINSTALL=1; irm https://ollama.com/install.ps1 | iex
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Environment variables:
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OLLAMA_VERSION Target version (default: latest stable)
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OLLAMA_INSTALL_DIR Custom install directory
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OLLAMA_UNINSTALL Set to 1 to uninstall Ollama
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OLLAMA_DEBUG Enable verbose output
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.EXAMPLE
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irm https://ollama.com/install.ps1 | iex
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.EXAMPLE
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$env:OLLAMA_VERSION = "0.5.7"; irm https://ollama.com/install.ps1 | iex
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.LINK
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https://ollama.com
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#>
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$ErrorActionPreference = "Stop"
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$ProgressPreference = "SilentlyContinue"
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# --------------------------------------------------------------------------
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# Configuration from environment variables
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# --------------------------------------------------------------------------
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$Version = if ($env:OLLAMA_VERSION) { $env:OLLAMA_VERSION } else { "" }
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$InstallDir = if ($env:OLLAMA_INSTALL_DIR) { $env:OLLAMA_INSTALL_DIR } else { "" }
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$Uninstall = $env:OLLAMA_UNINSTALL -eq "1"
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$DebugInstall = [bool]$env:OLLAMA_DEBUG
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# --------------------------------------------------------------------------
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# Constants
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# --------------------------------------------------------------------------
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# OLLAMA_DOWNLOAD_URL for developer testing only
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$DownloadBaseURL = if ($env:OLLAMA_DOWNLOAD_URL) { $env:OLLAMA_DOWNLOAD_URL.TrimEnd('/') } else { "https://ollama.com/download" }
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$InnoSetupUninstallGuid = "{44E83376-CE68-45EB-8FC1-393500EB558C}_is1"
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# --------------------------------------------------------------------------
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# Helpers
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# --------------------------------------------------------------------------
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function Write-Status {
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param([string]$Message)
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if ($DebugInstall) { Write-Host $Message }
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}
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function Write-Step {
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param([string]$Message)
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if ($DebugInstall) { Write-Host ">>> $Message" -ForegroundColor Cyan }
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}
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function Test-Signature {
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param([string]$FilePath)
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$sig = Get-AuthenticodeSignature -FilePath $FilePath
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if ($sig.Status -ne "Valid") {
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Write-Status " Signature status: $($sig.Status)"
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return $false
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}
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# Verify it's signed by Ollama Inc. (check exact organization name)
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# Anchor with comma/boundary to prevent "O=Not Ollama Inc." from matching
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$subject = $sig.SignerCertificate.Subject
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if ($subject -notmatch "(^|, )O=Ollama Inc\.(,|$)") {
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Write-Status " Unexpected signer: $subject"
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return $false
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}
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Write-Status " Signature valid: $subject"
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return $true
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}
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function Find-InnoSetupInstall {
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# Check both HKCU (per-user) and HKLM (per-machine) locations
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$possibleKeys = @(
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"HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall\$InnoSetupUninstallGuid",
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"HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\$InnoSetupUninstallGuid",
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"HKLM:\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\$InnoSetupUninstallGuid"
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)
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foreach ($key in $possibleKeys) {
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if (Test-Path $key) {
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Write-Status " Found install at: $key"
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return $key
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}
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}
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return $null
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}
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function Update-SessionPath {
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# Update PATH in current session so 'ollama' works immediately
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if ($InstallDir) {
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$ollamaDir = $InstallDir
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} else {
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$ollamaDir = Join-Path $env:LOCALAPPDATA "Programs\Ollama"
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}
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# Add to PATH if not already present
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if (Test-Path $ollamaDir) {
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$currentPath = $env:PATH -split ';'
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if ($ollamaDir -notin $currentPath) {
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$env:PATH = "$ollamaDir;$env:PATH"
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Write-Status " Added $ollamaDir to session PATH"
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}
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}
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}
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function Invoke-Download {
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param(
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[string]$Url,
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[string]$OutFile
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)
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Write-Status " Downloading: $Url"
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try {
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$request = [System.Net.HttpWebRequest]::Create($Url)
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$request.AllowAutoRedirect = $true
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$response = $request.GetResponse()
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$totalBytes = $response.ContentLength
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$stream = $response.GetResponseStream()
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$fileStream = [System.IO.FileStream]::new($OutFile, [System.IO.FileMode]::Create)
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$buffer = [byte[]]::new(65536)
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$totalRead = 0
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$lastUpdate = [DateTime]::MinValue
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$barWidth = 40
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try {
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while (($read = $stream.Read($buffer, 0, $buffer.Length)) -gt 0) {
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$fileStream.Write($buffer, 0, $read)
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$totalRead += $read
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$now = [DateTime]::UtcNow
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if (($now - $lastUpdate).TotalMilliseconds -ge 250) {
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if ($totalBytes -gt 0) {
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$pct = [math]::Min(100.0, ($totalRead / $totalBytes) * 100)
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$filled = [math]::Floor($barWidth * $pct / 100)
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$empty = $barWidth - $filled
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$bar = ('#' * $filled) + (' ' * $empty)
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$pctFmt = $pct.ToString("0.0")
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Write-Host -NoNewline "`r$bar ${pctFmt}%"
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} else {
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$sizeMB = [math]::Round($totalRead / 1MB, 1)
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Write-Host -NoNewline "`r${sizeMB} MB downloaded..."
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}
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$lastUpdate = $now
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}
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}
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# Final progress update
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if ($totalBytes -gt 0) {
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$bar = '#' * $barWidth
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Write-Host "`r$bar 100.0%"
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} else {
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$sizeMB = [math]::Round($totalRead / 1MB, 1)
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Write-Host "`r${sizeMB} MB downloaded. "
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}
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} finally {
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$fileStream.Close()
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$stream.Close()
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$response.Close()
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}
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} catch {
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if ($_.Exception -is [System.Net.WebException]) {
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$webEx = [System.Net.WebException]$_.Exception
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if ($webEx.Response -and ([System.Net.HttpWebResponse]$webEx.Response).StatusCode -eq [System.Net.HttpStatusCode]::NotFound) {
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throw "Download failed: not found at $Url"
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}
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}
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if ($_.Exception.InnerException -is [System.Net.WebException]) {
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$webEx = [System.Net.WebException]$_.Exception.InnerException
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if ($webEx.Response -and ([System.Net.HttpWebResponse]$webEx.Response).StatusCode -eq [System.Net.HttpStatusCode]::NotFound) {
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throw "Download failed: not found at $Url"
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}
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}
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throw "Download failed for ${Url}: $($_.Exception.Message)"
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}
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}
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# --------------------------------------------------------------------------
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# Uninstall
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# --------------------------------------------------------------------------
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function Invoke-Uninstall {
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Write-Step "Uninstalling Ollama"
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$regKey = Find-InnoSetupInstall
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if (-not $regKey) {
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Write-Host ">>> Ollama is not installed."
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return
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}
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$uninstallString = (Get-ItemProperty -Path $regKey).UninstallString
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if (-not $uninstallString) {
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Write-Warning "No uninstall string found in registry"
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return
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}
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# Strip quotes if present
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$uninstallExe = $uninstallString -replace '"', ''
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Write-Status " Uninstaller: $uninstallExe"
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if (-not (Test-Path $uninstallExe)) {
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Write-Warning "Uninstaller not found at: $uninstallExe"
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return
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}
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Write-Host ">>> Launching uninstaller..."
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# Run with GUI so user can choose whether to keep models
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Start-Process -FilePath $uninstallExe -Wait
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# Verify removal
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if (Find-InnoSetupInstall) {
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Write-Warning "Uninstall may not have completed"
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} else {
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Write-Host ">>> Ollama has been uninstalled."
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}
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}
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# --------------------------------------------------------------------------
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# Install
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# --------------------------------------------------------------------------
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function Invoke-Install {
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# Determine installer URL
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if ($Version) {
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$installerUrl = "$DownloadBaseURL/OllamaSetup.exe?version=$Version"
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} else {
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$installerUrl = "$DownloadBaseURL/OllamaSetup.exe"
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}
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# Download installer
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Write-Step "Downloading Ollama"
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if (-not $DebugInstall) {
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Write-Host ">>> Downloading Ollama for Windows..."
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}
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$tempInstaller = Join-Path $env:TEMP "OllamaSetup.exe"
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Invoke-Download -Url $installerUrl -OutFile $tempInstaller
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# Verify signature
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Write-Step "Verifying signature"
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if (-not (Test-Signature -FilePath $tempInstaller)) {
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Remove-Item $tempInstaller -Force -ErrorAction SilentlyContinue
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throw "Installer signature verification failed"
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}
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# Build installer arguments
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$installerArgs = "/VERYSILENT /NORESTART /SUPPRESSMSGBOXES"
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if ($InstallDir) {
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$installerArgs += " /DIR=`"$InstallDir`""
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}
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Write-Status " Installer args: $installerArgs"
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# Run installer
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Write-Step "Installing Ollama"
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if (-not $DebugInstall) {
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Write-Host ">>> Installing Ollama..."
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}
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# Create upgrade marker so the app starts hidden
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# The app checks for this file on startup and removes it after
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$markerDir = Join-Path $env:LOCALAPPDATA "Ollama"
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$markerFile = Join-Path $markerDir "upgraded"
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if (-not (Test-Path $markerDir)) {
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New-Item -ItemType Directory -Path $markerDir -Force | Out-Null
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}
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New-Item -ItemType File -Path $markerFile -Force | Out-Null
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Write-Status " Created upgrade marker: $markerFile"
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# Start installer and wait for just the installer process (not children)
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# Using -Wait would wait for Ollama to exit too, which we don't want
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$proc = Start-Process -FilePath $tempInstaller `
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-ArgumentList $installerArgs `
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-PassThru
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$proc.WaitForExit()
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if ($proc.ExitCode -ne 0) {
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Remove-Item $tempInstaller -Force -ErrorAction SilentlyContinue
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throw "Installation failed with exit code $($proc.ExitCode)"
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}
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# Cleanup
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Remove-Item $tempInstaller -Force -ErrorAction SilentlyContinue
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# Update PATH in current session so 'ollama' works immediately
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Write-Step "Updating session PATH"
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Update-SessionPath
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Write-Host ">>> Install complete. Run 'ollama' from the command line."
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}
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# --------------------------------------------------------------------------
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# Main
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# --------------------------------------------------------------------------
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if ($Uninstall) {
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Invoke-Uninstall
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} else {
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Invoke-Install
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}
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