azurerm_function_app_function file updates should not ForceNew resource

[dav009]

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Description

Current behaviour

Whenever files declared in the file block changes, it triggers a deletion and a new resource creation (see code snippet below). This is troublesome for deployments. Also because this provider assumes the destruction of a function takes 30s, but more often than None, the function still exists by the time when creation is requested, resulting in errors.

Furthermore the AZ CLI is able to update this resource in place.

# Expected behaviour
Updating files should trigger an inplace update of this resource.

resource "azurerm_function_app_function" "trigger_function" {
  name            = ".."
  function_app_id =  "..."
  language        = "Python"
  file {
    name = "__init__.py"
    content = file("somepackage/__init__.py")
  }

  config_json = jsonencode({
    "scriptFile" : "__init__.py",
    "bindings" : [
      {
        "name" : "..",
        "type" : "blobTrigger",
        "direction" : "in",
        "path" : "a/{filename}.json",
        "connection" : "TriggerBucket"
      },
      {
        "name" : "..",
        "type" : "blob",
        "direction" : "out"
        "path" : "b/{filename}.json",
        "connection" : "TriggerBucket",
      }
    ]
  })
}

New or Affected Resource(s)/Data Source(s)

azurerm_function_app_function

Potential Terraform Configuration

No response

References

No response

[xiaxyi]

@dav009 Thanks for this, may I know which cli command are you talking about? I didn't see any in-place update available in azure cli command list:https://docs.microsoft.com/en-us/cli/azure/functionapp/function?view=azure-cli-latest