Could not locate source_path "null" despite create_function = false

[DuncanKwokTR]

Description

I already have zipped my own package and do not require create_function, so it is set to false.
Yet despite that, module is looking to for source_path of the deployment.
It is already given local_existing_package = "file.zip"

module "r53_lambda_function_externally_managed_package" {
source = "../../Resource_modules/lambda/"
create_function = true # to control creation of the Lambda Function and related resources
create_package = false # to control build package process
create_layer = false # to control creation of the Lambda Layer and related resources
create_role = true # to control creation of the IAM role and policies required for Lambda Function

function_name = local.vds_lambda_function_name
description = "My lambda function code is deployed separately"
handler = var.vds_lambda_handler
runtime = var.vds_lambda_runtime
ignore_source_code_hash = true
vpc_security_group_ids = [module.r53_security_group.security_group]
vpc_subnet_ids = var.vds_lambda_subnet_ids

attach_cloudwatch_logs_policy = false
attach_dead_letter_policy = false
attach_network_policy = false
attach_tracing_policy = false
attach_async_event_policy = false

local_existing_package = var.vds_lambda_filename

Depsite asking not to create package...

source_path = local.source_path

source_path = "../../../lambda_python/healthcheck.zip"

// IAM Role Create
role_path = local.iam_lambda_role_path
role_name = local.iam_lambda_role_name
role_description = local.iam_lambda_role_description
role_permissions_boundary = local.iam_lambda_role_permissions_boundary_arn
role_force_detach_policies = local.iam_lambda_force_detach_policies

// IAM Policy Create
policy_name = local.iam_lambda_policy_name
policy_path = local.iam_lambda_policy_path
policy_json = local.iam_lambda_policy

// IAM Policy Attachment
attach_policy_json = true

}

Looking at the main.tf module, I see only 2 references to source_path
resource "null_resource" "sam_metadata_aws_lambda_function" {
count = local.create && var.create_package && var.create_function && !var.create_layer ? 1 : 0

resource "null_resource" "sam_metadata_aws_lambda_layer_version" {
count = local.create && var.create_package && var.create_layer ? 1 : 0

To my understanding, if create_package = false, source_path should not even be required and will be null.

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• ✋ I have searched the open/closed issues and my issue is not listed.

⚠️ Note

Before you submit an issue, please perform the following first:

1. Remove the local .terraform directory (! ONLY if state is stored remotely, which hopefully you are following that best practice!): rm -rf .terraform/
2. Re-initialize the project root to pull down modules: terraform init
3. Re-attempt your terraform plan or apply and check if the issue still persists

Versions

• Module version [Required]: 4.8

• Terraform version:
  Terraform v1.3.6
  on linux_amd64

• Provider version(s):
  Terraform v1.3.6
  on linux_amd64

• provider registry.terraform.io/hashicorp/aws v4.51.0
• provider registry.terraform.io/hashicorp/external v2.2.3
• provider registry.terraform.io/hashicorp/local v2.3.0
• provider registry.terraform.io/hashicorp/null v3.2.1

Reproduction Code [Required]

Steps to reproduce the behavior:

no yes

call the resource module to create lambda function that has externally managed package and don;t build it from source.

Expected behavior

Skip the creation of the package.

Actual behavior

it is looking asking for source_path, despite create_function = false.

Terminal Output Screenshot(s)

│ Error: External Program Execution Failed
│
│ with module.r53_lambda_permission.data.external.archive_prepare[0],
│ on ../../Resource_modules/lambda/package.tf line 10, in data "external" "archive_prepare":
│ 10: program = [local.python, "${path.module}/package.py", "prepare"]
│
│ The data source received an unexpected error while attempting to execute the program.
│
│ Program: /usr/local/bin/python3
│ Error Message: Could not locate source_path "null". Paths are relative to directory where terraform plan is being run
│ ("/home/users/gitprojects/Infrastructure_modules/cloud_container_infrastructure")

It says paths are relative, but in variables.tf, it says absolute path.
variable "source_path" {
description = "The absolute path to a local file or directory containing your Lambda source code"
type = any # string | list(string | map(any))
default = null
}

I've also tried to set create_function = true but it can never find my source through source_path even though it is correct.

Additional context

[DuncanKwokTR]

Apologies, in my original post, i wrote source_path = "../../../lambda_python/healthcheck.zip"
It is supposed to be simply source_path = "../../../lambda_python" but still didnt work.

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