################################################################################
##  File:  Install-GitHub-CLI.ps1
##  Desc:  Install GitHub CLI
##  Supply chain security: GitHub CLI - checksum validation
################################################################################

Write-Host "Get the latest gh version..."

$repoUrl = "https://api.github.com/repos/cli/cli/releases/latest"
$installerFile = "gh_windows_amd64.msi"
$assets = (Invoke-RestMethod -Uri $repoUrl).assets
$downloadUrl = ($assets.browser_download_url -match "windows_amd64.msi") | Select-Object -First 1
$packagePath = Start-DownloadWithRetry -Url $downloadUrl -Name $installerFile

#region Supply chain security - GitHub CLI
$fileHash = (Get-FileHash -Path $packagePath -Algorithm SHA256).Hash
$hashUrl = ($assets.browser_download_url -match "checksums.txt") | Select-Object -First 1
$externalHash = (Invoke-RestMethod -Uri $hashURL).ToString().Split("`n").Where({ $_ -ilike "*windows_amd64.msi*" }).Split(' ')[0]
Use-ChecksumComparison $fileHash $externalHash
#endregion

Install-Binary -FilePath $packagePath

Add-MachinePathItem "C:\Program Files (x86)\GitHub CLI"

Invoke-PesterTests -TestFile "CLI.Tools" -TestName "GitHub CLI"