Terraform provider to validate Amazon EventBridge Cron expressions.
If the cron expression is incorrect, an error will occur in terraform plan.
provider "cronplan" {
}
data "cronplan_expr" "every_weekday" {
# NOTE: Expression is validated with terraform plan.
expr = "cron(5 0 ? * MON-FRI *)"
from = "2023-09-30 10:00:00 UTC" # Optional
}
output "every_weekday" {
value = data.cronplan_expr.every_weekday.schedules
}
check "every_weekday_schedules" {
assert {
condition = data.cronplan_expr.every_weekday.schedules == tolist([
"Mon, 02 Oct 2023 00:05:00",
"Tue, 03 Oct 2023 00:05:00",
"Wed, 04 Oct 2023 00:05:00",
"Thu, 05 Oct 2023 00:05:00",
"Fri, 06 Oct 2023 00:05:00",
"Mon, 09 Oct 2023 00:05:00",
"Tue, 10 Oct 2023 00:05:00",
"Wed, 11 Oct 2023 00:05:00",
"Thu, 12 Oct 2023 00:05:00",
"Fri, 13 Oct 2023 00:05:00",
])
error_message = "Unexpected schedule: \n${join("\n", data.cronplan_expr.every_weekday.schedules)}"
}
}cp cronplan.tf.sample cronplan.tf
make tf-plan