Support setting functionapp kind on Azure Functions projects

[captainsafia]

To support Functions-specific deployment behaviors, we want to be able to assign the functionapp kind to the container app associated with the AzureFunctionsProjectResource during deployment time.

[davidfowl]

@captainsafia can you clarify where this gets set in the container app definition?

[captainsafia]

See the sample below. I realize this isn't documented in the official definition.

@description('The location for the resource(s) to be deployed.')
param location string = resourceGroup().location

param storage_outputs_blobendpoint string

param storage_outputs_queueendpoint string

param storage_outputs_tableendpoint string

param messaging_outputs_servicebusendpoint string

param eventhubs_outputs_eventhubsendpoint string

param outputs_azure_container_registry_managed_identity_id string

param outputs_managed_identity_client_id string

param outputs_azure_container_apps_environment_id string

param outputs_azure_container_registry_endpoint string

param acanativefunctions_containerimage string

resource acanativefunctions 'Microsoft.App/containerApps@2024-10-02-preview' = {
  name: 'acanativefunctions'
  location: location
  properties: {
    configuration: {
      activeRevisionsMode: 'Single'
      ingress: {
        external: true
        targetPort: 8080
        transport: 'http'
      }
      registries: [
        {
          server: outputs_azure_container_registry_endpoint
          identity: outputs_azure_container_registry_managed_identity_id
        }
      ]
    }
    environmentId: outputs_azure_container_apps_environment_id
    template: {
      containers: [
        {
          image: acanativefunctions_containerimage
          name: 'acanativefunctions'
          env: []
      scale: {
        minReplicas: 1
      }
    }
  }
  identity: {
    type: 'UserAssigned'
    userAssignedIdentities: {
      '${outputs_azure_container_registry_managed_identity_id}': { }
    }
  }
  kind: 'functionapp' // here
}

[davidfowl]

Ok top level

[mattchenderson]

Adding a link to Azure/azure-sdk-for-net#48417 which might be helpful if we can resolve it. It would probably simplify testing to be able to leverage PublishAsContainerApp for this until this work item is tackled.

I don't know how much codegen Azure.Provisioning is doing, but those docs are also typically built off of the service's Swagger, which is what would also be used for generation.