Extend GPG workaround to Ubuntu 26.04 (resolute) and add tests

Author: Copilot

src/terraform/install.sh

@@ -19,8 +19,8 @@ INSTALL_SENTINEL=${INSTALLSENTINEL:-false}
 INSTALL_TFSEC=${INSTALLTFSEC:-false}
 INSTALL_TERRAFORM_DOCS=${INSTALLTERRAFORMDOCS:-false}
 CUSTOM_DOWNLOAD_SERVER="${CUSTOMDOWNLOADSERVER:-""}"
-# This is because ubuntu noble and debian trixie don't support the old format of GPG keys and validation 
-NEW_GPG_CODENAMES="trixie noble"
+# This is because ubuntu noble, ubuntu resolute and debian trixie don't support the old format of GPG keys and validation 
+NEW_GPG_CODENAMES="trixie noble resolute"
 
 TERRAFORM_SHA256="${TERRAFORM_SHA256:-"automatic"}"
 TFLINT_SHA256="${TFLINT_SHA256:-"automatic"}"
@@ -52,7 +52,7 @@ if [ "$(id -u)" -ne 0 ]; then
     exit 1
 fi
 
-# Detect Ubuntu Noble or Debian Trixie and use new repo setup, else use legacy GPG logic
+# Detect Ubuntu Noble, Ubuntu Resolute or Debian Trixie and use new repo setup, else use legacy GPG logic
 IS_GPG_NEW=0
 . /etc/os-release
 if [[ "${NEW_GPG_CODENAMES}" == *"${VERSION_CODENAME}"* ]]; then

test/terraform/install_in_ubuntu_resolute.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+set -e
+
+# Import test library
+source dev-container-features-test-lib
+
+# Check if terraform was installed correctly
+check "terraform installed" terraform --version
+
+check "tflint" tflint --version
+
+# Report results
+reportResults

test/terraform/install_in_ubuntu_resolute_sentinel.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+set -e
+
+# Import test library for `check` command
+source dev-container-features-test-lib
+
+# Check if terraform was installed correctly
+check "terraform installed" terraform --version
+
+check "tflint" tflint --version
+
+# Sentinel specific tests
+check "sentinel" sentinel --version
+
+# Report result
+reportResults

test/terraform/scenarios.json

@@ -31,6 +31,22 @@
             }
         }
     },
+    "install_in_ubuntu_resolute": {
+        "image": "ubuntu:resolute",
+        "features": {
+            "terraform": {
+                "version": "latest"
+            }
+        }
+    },
+    "install_in_ubuntu_resolute_sentinel": {
+        "image": "ubuntu:resolute",
+        "features": {
+            "terraform": {
+                "installSentinel": true
+            }
+        }
+    },
     "install_sentinel": {
         "image": "mcr.microsoft.com/devcontainers/base:jammy",
         "features": {