Install the latest release of the Azure Functions item and project templates for dotnet new

install-azure-functions-templates.ps1

# Install the latest release of the Azure item and project templates:
#
# See [Azure Functions Templates wiki](https://github.com/Azure/azure-functions-templates/wiki/Using-the-templates-directly-via-dotnet-new)
# See [Issue 721](https://github.com/Azure/azure-functions-templates/issues/721)

$feed = Invoke-WebRequest https://functionscdn.azureedge.net/public/cli-feed-v3.json | ConvertFrom-Json
$release = $feed.tags.v2.release

foreach ($t in "itemTemplates", "projectTemplates") {
    $uri = $feed.releases."$release"."$t"
    $headers = Invoke-WebRequest $uri -Method Head 
    $name = $headers.Headers."Content-Disposition" -replace 'filename=(.*)', '$1'
    Write-Output "Installing $name ..."
    $tmpFile = [System.IO.Path]::GetTempFileName();
    Invoke-WebRequest $uri -OutFile $tmpFile
    dotnet new -i $tmpFile | Out-Null
    Remove-Item $tmpFile
}

# To uninstall:
# 
# dotnet new -u Azure.Functions.Templates
# dotnet new -u Microsoft.AzureFunctions.ProjectTemplates