Install Github cli on machine with not admin access.

Install-GithubCli.ps1

function Install-GitHubCli {
    # Create .gh folder if it doesn't exist
    $userProfileFolder = [Environment]::GetFolderPath('UserProfile')
    $ghFolder = Join-Path -Path $userProfileFolder -ChildPath '.gh'
    if (-not (Test-Path -LiteralPath $ghFolder)) {
        New-Item -Path $ghFolder -ItemType Directory > $null
    }

    # Get the main releases page HTML
    $releasesUrl = 'https://github.com/cli/cli/releases'
    $releasesHtml = Invoke-WebRequest -Uri $releasesUrl -UseBasicParsing

    # Identify the latest version using the first release link
    if ($releasesHtml.Content -notmatch '/cli/cli/releases/tag/(?<Version>[^"]+)') {
        Write-Error -Message 'No release link found.'
        return
    }

    $version = $matches['Version']

    # Download the zip file
    $downloadUrl = "https://github.com/cli/cli/releases/download/${version}/gh_$($version -replace '^v')_windows_amd64.zip"
    $zipFileName = "gh_${version}_windows_amd64.zip"
    $zipPath = Join-Path -Path $env:TEMP -ChildPath $zipFileName
    Invoke-WebRequest -Uri $downloadUrl -OutFile $zipPath

    # Extract gh.exe using Expand-Archive
    Expand-Archive -LiteralPath $zipPath -DestinationPath $ghFolder -Force

    # Clean up
    Remove-Item -LiteralPath $zipPath

    # Add to environment PATH for the current process and future processes via a user environment setting update if the path is not already present
    $currentPath = [Environment]::GetEnvironmentVariable('Path', [EnvironmentVariableTarget]::Process)
    $ghExeFolder = Join-Path -Path $ghFolder -ChildPath 'bin'
    if ($currentPath.Split(';') -notcontains $ghExeFolder) {
        ${env:Path} = "${currentPath};${ghExeFolder}"
        [Environment]::SetEnvironmentVariable('Path', ${env:Path}, [EnvironmentVariableTarget]::Process)
        [Environment]::SetEnvironmentVariable('Path', ${env:Path}, [EnvironmentVariableTarget]::User)
    }

    Write-Output "gh.exe installed to ${ghFolder} and ${ghExeFolder} added to PATH."
}
Install-GitHubCli