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Merged
mhuisi merged 1 commit into from
Nov 13, 2025
Merged

feat: more robust windows installation #689

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12 changes: 6 additions & 6 deletions vscode-lean4/media/guide-installLean-windows.md
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Original file line number Diff line number Diff line change
Expand Up @@ -13,10 +13,10 @@ On newer Windows systems that support the package manager [winget](https://learn
# Install Git using `winget`.
winget install -e --id Git.Git --silent --accept-package-agreements --accept-source-agreements --disable-interactivity
# Download the Elan installation script at https://github.com/leanprover/elan/blob/master/elan-init.ps1 and run it. Elan will be installed to `%USERPROFILE%\.elan`.
Invoke-WebRequest -Uri "https://elan.lean-lang.org/elan-init.ps1" -OutFile "elan-init.ps1"
$installCode = (Invoke-WebRequest -Uri "https://elan.lean-lang.org/elan-init.ps1" -UseBasicParsing -ErrorAction Stop).Content
$installer = [ScriptBlock]::Create([System.Text.Encoding]::UTF8.GetString($installCode))
Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope Process
.\elan-init.ps1 -NoPrompt 1 -DefaultToolchain leanprover/lean4:stable
del .\elan-init.ps1
& $installer -NoPrompt 1 -DefaultToolchain ${elanStableChannel}
```

On older Windows systems that do not support the package manager [winget](https://learn.microsoft.com/en-us/windows/package-manager/winget/), the following script will be executed instead:
Expand All @@ -29,10 +29,10 @@ New-Item -ItemType Directory -Path $installDir -Force
Invoke-WebRequest -Uri $gitInstallerUrl -OutFile $gitInstallerLoc
& $gitInstallerLoc /VERYSILENT /NORESTART /SP-
# Download the Elan installation script at https://github.com/leanprover/elan/blob/master/elan-init.ps1 and run it. Elan will be installed to `%USERPROFILE%\.elan`.
Invoke-WebRequest -Uri "https://elan.lean-lang.org/elan-init.ps1" -OutFile "elan-init.ps1"
$installCode = (Invoke-WebRequest -Uri "https://elan.lean-lang.org/elan-init.ps1" -UseBasicParsing -ErrorAction Stop).Content
$installer = [ScriptBlock]::Create([System.Text.Encoding]::UTF8.GetString($installCode))
Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope Process
.\elan-init.ps1 -NoPrompt 1 -DefaultToolchain leanprover/lean4:stable
del .\elan-init.ps1
& $installer -NoPrompt 1 -DefaultToolchain ${elanStableChannel}
```

## Restricted Environments
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16 changes: 11 additions & 5 deletions vscode-lean4/src/utils/leanInstaller.ts
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Expand Up @@ -19,11 +19,17 @@ import {
displayStickyNotificationWithOptionalInput,
} from './notifs'

const windowsInstallationScript = `Invoke-WebRequest -Uri "https://elan.lean-lang.org/elan-init.ps1" -OutFile "elan-init.ps1"
Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope Process
$rc = .\\elan-init.ps1 -NoPrompt 1 -DefaultToolchain ${elanStableChannel}
del .\\elan-init.ps1
exit $rc`
const windowsInstallationScript = `try {
$installCode = (Invoke-WebRequest -Uri "https://elan.lean-lang.org/elan-init.ps1" -UseBasicParsing -ErrorAction Stop).Content
$installer = [ScriptBlock]::Create([System.Text.Encoding]::UTF8.GetString($installCode))
Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope Process
$rc = & $installer -NoPrompt 1 -DefaultToolchain ${elanStableChannel}
exit $rc
} catch {
Write-Host "Downloading and running the Elan installer failed."
Write-Host $_
exit 1
}`

const unixInstallationScript = `curl "https://elan.lean-lang.org/elan-init.sh" -sSf | sh -s -- -y --default-toolchain ${elanStableChannel}`

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