Mark Many As Read Enabled By Default

Reading detection for local module sources

Terragrunt can select units by the files they read, which is the basis of change-based runs in CI. Previously, pointing a unit's terraform block at a local directory didn't mark the files inside that directory as read, so a change to the module wouldn't select the unit.

When a unit's source is a local module, Terragrunt now records the module's *.tf, *.tf.json, *.hcl, *.tofu, and *.tofu.json files as read by that unit, so --filter 'reading=<path>' and --queue-include-units-reading select the unit when a module file changes:

terragrunt run --all --filter 'reading=./modules/vpc/main.tf' -- plan

For files that reading detection doesn't track on its own, the new mark_glob_as_read() HCL function expands a glob and marks every matching file as read in one call:

locals {
  configs = mark_glob_as_read("${get_terragrunt_dir()}/config/{*.yaml,**/*.yaml}")
}

Existing pipelines built on --queue-include-units-reading or reading= filters may select more units than before, because changes to local module files now count as reads. Previously gated behind the mark-many-as-read experiment, these behaviors no longer require --experiment mark-many-as-read.