void InitializeProdEnvironment()

in src/Saas.Admin/Saas.Admin.Service/Program.cs [172:197]
16 lines of code
1 McCabe index (conditional complexity)

void InitializeProdEnvironment()
{
    // For procution environment, we'll configured Managed Identities for managing access Azure App Services
    // and Key Vault. The Azure App Services endpoint is stored in an environment variable for the web app.

    var version = builder.Configuration.GetRequiredSection("Version")?.Value
        ?? throw new NullReferenceException("The Version value cannot be found. Has the 'Version' environment variable been set correctly for the Web App?");

    logger.LogInformation("Version: {version}", version);
    logger.LogInformation($"Is Production.");

    var appConfigurationEndpoint = builder.Configuration.GetRequiredSection("AppConfiguration:Endpoint")?.Value
        ?? throw new NullReferenceException("The Azure App Configuration Endpoint cannot be found. Has the endpoint environment variable been set correctly for the Web App?");

    // Get the ClientId of the UserAssignedIdentity
    // If we don't set this ClientID in the ManagedIdentityCredential constructor, it doesn't know it should use the user assigned managed id.
    var managedIdentityClientId = builder.Configuration.GetRequiredSection("UserAssignedManagedIdentityClientId")?.Value
        ?? throw new NullReferenceException("The Environment Variable 'UserAssignedManagedIdentityClientId' cannot be null. Check the App Service Configuration.");

    ManagedIdentityCredential userAssignedManagedCredentials = new(managedIdentityClientId);

    builder.Configuration.AddAzureAppConfiguration(options =>
        options.Connect(new Uri(appConfigurationEndpoint), userAssignedManagedCredentials)
            .ConfigureKeyVault(kv => kv.SetCredential(userAssignedManagedCredentials))
        .Select(KeyFilter.Any, version)); // <-- Important since we're using labels in our Azure App Configuration store
}