Extension bundle provides a way for non-dotnet function apps to reference and use to Azure Function extension packages written in C#. It does that by bundling several of the azure function extensions into a single package and then referencing extension bundle via host.json. Below is sample configuration for extension bundles.

{
    "version": "2.0",
    "extensionBundle": {
        "id": "Microsoft.Azure.Functions.ExtensionBundle",
        "version": "[1.*, 2.0.0)"
    }
}

Branch	Status
v1.x
v2.x
v3.x
v3.x-preview
v4.x-preview

• Dotnet Core SDK 2.2
• Dotnet Core SDK 3.1

cd build

dotnet run skip:PackageNetCoreV3BundlesLinux,CreateCDNStoragePackageLinux,BuildBundleBinariesForLinux,DownloadManifestUtility,RunManifestUtilityLinux,RunManifestUtilityWindows

cd build

dotnet run skip:dotnet run skip:PackageNetCoreV2Bundle,PackageNetCoreV3BundlesWindows,CreateRUPackage,CreateCDNStoragePackage,CreateCDNStoragePackageWindows,BuildBundleBinariesForWindows,DownloadManifestUtility,RunManifestUtilityWindows,RunManifestUtilityLinux

1. Identify the bundle version you want to update and checkout the corresponding branch

   Bundle version	Branch
   v1.x	https://github.com/Azure/azure-functions-extension-bundles/tree/v1.x
   v2.x	https://github.com/Azure/azure-functions-extension-bundles/tree/v2.x
   v3.x	https://github.com/Azure/azure-functions-extension-bundles/tree/v3.x
   v3.x-preview	https://github.com/Azure/azure-functions-extension-bundles/tree/v3.x-preview
   v4.x-preview	https://github.com/Azure/azure-functions-extension-bundles/tree/v4.x-preview

2. Add the following details to extensions.json file

   {
           "id": "Microsoft.Azure.WebJobs.Extensions.Kafka", // Nuget package id for the extension
   
           "majorVersion": "3",                              // Major version of the extension
   
           "name": "Kafka",                                  // This should match the name proprerty from bin/extensions.json in the generated output
                                                             // Easiest way to find out this is to perform the following steps.
                                                             // 1. Install the extension package to pre-compiled function app
                                                             // 2. Build the function app
                                                             // 3. Look at the bin/extension.json file in the output
   
           "bindings": [                                     // binding attributes supported by the extension.
               "kafkatrigger",
               "kafka"
           ]
       }

3. Build and test the extension bundle

• Follow the steps mentioned at the link below to add a template to extension bundle.

  • https://github.com/Azure/azure-functions-templates#adding-a-template-to-extension-bundle

• Also follow the steps mentioned at the link below to test templates added to extension bundle

  • https://github.com/Azure/azure-functions-templates#testing-script-type-template-via-core-tools

1. Build extension bundles locally and locate the artifacts\Microsoft.Azure.Functions.ExtensionBundle.{version}_any-any.zip file.
2. Create a function app via core tools, open host.json to verify that it has extension bundle configuration present.
   • Sample commands for node app: func init . --worker-runtime node
3. Execute the func GetExtensionBundlePath to find the path to the bundle being used.
   • Sample response: %userprofile%\.azure-functions-core-tools\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle\2.8.4
4. Replace the contents of the bundle directory from step 3 with the contents of the zip file from Step 1.

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