Added the UseLogger extension method to provide access to IConfiguration. (#4)

Author: junalmeida

Autofac.Extensions.DependencyInjection.AzureFunctions/ConfigurationExtensions.cs

@@ -98,6 +98,24 @@ public static IFunctionsHostBuilder UseAppSettings(this IFunctionsHostBuilder ho
             return hostBuilder;
         }
 
+
+        /// <summary>
+        /// Adds logging services to the specified HostBuilder
+        /// </summary>
+        /// <param name="hostBuilder">An instance of <see cref="IFunctionsHostBuilder"/>.</param>
+        /// <param name="configure">The <see cref="ILoggingBuilder"/> configuration delegate.</param>
+        /// <returns>The IFunctionsHostBuilder.</returns>
+        public static IFunctionsHostBuilder UseLogger(this IFunctionsHostBuilder hostBuilder, Action<ILoggingBuilder, IConfiguration> configure)
+        {
+            var configuration = hostBuilder.Services.Where(x => x.ServiceType == typeof(IConfiguration)).SingleOrDefault()?.ImplementationInstance as IConfiguration;
+
+            hostBuilder.Services.AddLogging((config) => configure?.Invoke(config, configuration));
+
+            return hostBuilder;
+        }
+
+
+
         /// <summary>
         /// Share one instance of the component within the context of a single
         /// azure function trigger request.

SampleAutofacFunction/Startup.cs

@@ -2,6 +2,7 @@
 using Autofac.Extensions.DependencyInjection.AzureFunctions;
 using Microsoft.Azure.Functions.Extensions.DependencyInjection;
 using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
 using SampleAutofacFunction.Settings;
 
 [assembly: FunctionsStartup(typeof(SampleAutofacFunction.Startup))]
@@ -14,9 +15,15 @@ public override void Configure(IFunctionsHostBuilder builder)
         {
             builder
                 .UseAppSettings()
+                .UseLogger(ConfigureLogger)
                 .UseAutofacServiceProviderFactory(ConfigureContainer);
         }
 
+        private void ConfigureLogger(ILoggingBuilder builder, IConfiguration config)
+        {
+            builder.AddConfiguration(config.GetSection("Logging"));
+        }
+
         private void ConfigureContainer(ContainerBuilder builder)
         {
             builder

SampleAutofacFunction/appsettings.json

@@ -1,4 +1,11 @@
 {
+    "Logging": {
+        "LogLevel": {
+            "Default": "Information",
+            "System": "Error"
+        }
+    },
+
     "MySettings": {
         "Value1": "Value 1 from appsettings.json",
         "Value2": "Value 2 from appsettings.json"