v2 modularization: tier gates, test-external harness, workflow fixes

- Update check-acyclic-deps tier map to the 16-module tree (drop removed packages, use renamed names); all four CI gates (acyclic, single-source, siv-placement, no-replaces) pass.
- Add test-external/ consumer-simulation (own go.mod, kept out of go.work) that pulls core + terraform under GOWORK=off; red until the coordinated v2 tags exist, by design.
- Fix v2-release.yml tag-push list to the 16 modules (no shell/slack/oci/version-checker/cmd; renamed http-helper/dns-helper/test-structure).

Author: james00012

.github/workflows/v2-release.yml

@@ -66,11 +66,11 @@ jobs:
           # Same order as docs/v2-release-runbook.md.
           ORDER=(
             modules/core
-            modules/shell modules/ssh modules/http-helper modules/dns-helper modules/version-checker
-            modules/docker modules/packer modules/database modules/slack modules/oci modules/opa
+            modules/ssh modules/httphelper modules/dnshelper
+            modules/docker modules/packer modules/database modules/opa
             modules/aws modules/azure modules/gcp modules/k8s modules/helm
-            modules/terraform modules/terragrunt modules/test-structure
-            cmd/terratest_log_parser cmd/pick-instance-type
+            modules/terraform modules/terragrunt modules/teststructure
+           
           )
 
           for path in "${ORDER[@]}"; do
@@ -92,7 +92,7 @@ jobs:
           # Allow the proxy a moment to populate after push.
           sleep 30
           fail=0
-          for path in modules/core modules/shell modules/ssh modules/http-helper modules/dns-helper modules/version-checker modules/docker modules/packer modules/database modules/slack modules/oci modules/opa modules/aws modules/azure modules/gcp modules/k8s modules/helm modules/terraform modules/terragrunt modules/test-structure cmd/terratest_log_parser cmd/pick-instance-type; do
+          for path in modules/core modules/ssh modules/httphelper modules/dnshelper modules/docker modules/packer modules/database modules/opa modules/aws modules/azure modules/gcp modules/k8s modules/helm modules/terraform modules/terragrunt modules/teststructure; do
             url="https://proxy.golang.org/github.com/gruntwork-io/terratest/${path}/v2/@v/${VERSION}.info"
             code=$(curl -s -o /dev/null -w '%{http_code}' "$url")
             if [ "$code" = "200" ]; then

modules/core/go.mod

@@ -1,23 +1,3 @@
 module github.com/gruntwork-io/terratest/modules/core/v2
 
 go 1.26
-
-require (
-	github.com/gruntwork-io/go-commons v0.17.2
-	github.com/jstemmer/go-junit-report v1.0.0
-	github.com/mattn/go-zglob v0.0.6
-	github.com/sirupsen/logrus v1.9.4
-	github.com/stretchr/testify v1.11.1
-)
-
-require (
-	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/go-errors/errors v1.4.2 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/urfave/cli/v2 v2.10.3 // indirect
-	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
-	golang.org/x/sys v0.18.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)

scripts/check-acyclic-deps.sh

@@ -12,15 +12,12 @@ set -uo pipefail
 # Tier assignment. Lower number = lower layer.
 declare -A TIER=(
   [core]=0
-  [shell]=1
   [ssh]=1
-  [http-helper]=1
-  [dns-helper]=1
+  [httphelper]=1
+  [dnshelper]=1
   [docker]=2
   [packer]=2
   [database]=2
-  [slack]=2
-  [oci]=2
   [opa]=2
   [aws]=3
   [azure]=3
@@ -29,8 +26,7 @@ declare -A TIER=(
   [helm]=3
   [terraform]=4
   [terragrunt]=4
-  [test-structure]=4
-  [version-checker]=4
+  [teststructure]=4
 )
 
 fail=0

test-external/consumer_test.go

@@ -0,0 +1,21 @@
+package external_test
+
+import (
+	"testing"
+
+	"github.com/gruntwork-io/terratest/modules/core/v2/random"
+	"github.com/gruntwork-io/terratest/modules/terraform/v2"
+	"github.com/stretchr/testify/assert"
+)
+
+// Proves a real external consumer can pull a tier-0 module (core) and a top-tier
+// module (terraform, which transitively requires httphelper/opa/ssh) purely through
+// published go.mods under GOWORK=off.
+func TestExternalConsumer(t *testing.T) {
+	t.Parallel()
+
+	assert.Len(t, random.UniqueId(), 6)
+
+	opts := terraform.Options{TerraformDir: "."}
+	assert.Equal(t, ".", opts.TerraformDir)
+}

test-external/go.mod

@@ -0,0 +1,13 @@
+// In-repo consumer-simulation project. Imports a cross-section of terratest v2
+// submodules under GOWORK=off so CI can verify the external-consumer experience:
+// each submodule resolves through its own go.mod and the proxy, not the workspace.
+// NOT published; exists only to be tested by CI (red until the v2 tags are cut).
+module github.com/gruntwork-io/terratest/test-external
+
+go 1.26
+
+require (
+	github.com/gruntwork-io/terratest/modules/core/v2 v2.0.0
+	github.com/gruntwork-io/terratest/modules/terraform/v2 v2.0.0
+	github.com/stretchr/testify v1.11.1
+)