cloudwatch-dashboards-one-shot.tf

# from variables.tf
locals {
  ...
  lambda_sourcepath  = "../src"
  lambda_zipfilename = "../dist/cloudwatch-dashboards-updater.zip"
}

# from data.tf, actually creates the zip file.
data "archive_file" "cloudwatch_dashboard_lambda_zipfile" {
  type        = "zip"
  source_dir  = local.lambda_sourcepath
  output_path = local.lambda_zipfilename
}

# from lambda_function.tf
resource "aws_lambda_function" "lambda_function" {
  depends_on = [data.archive_file.cloudwatch_dashboard_lambda_zipfile]
  function_name = “func_name”
  filename      = local.lambda_zipfilename
  ...
}