chore(terraform): align with current terraform standards (charmkeeper)

.github/workflows/test_terraform_module.yaml

@@ -0,0 +1,18 @@
+# Copyright 2025 Canonical Ltd.
+# See LICENSE file for licensing details.
+
+name: Terraform modules tests
+
+on:
+  workflow_dispatch:
+  pull_request:
+    paths:
+      - 'terraform/**'
+
+jobs:
+  terraform-tests:
+    uses: canonical/operator-workflows/.github/workflows/terraform_modules_test.yaml@main
+    secrets: inherit
+    with:
+      k8s-controller: true
+      terraform-directories: '["terraform"]'

renovate.json

@@ -1,6 +1,15 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "automerge": true,
+  "customDatasources": {
+    "charmhub": {
+      "defaultRegistryUrlTemplate": "https://api.charmhub.io/v2/charms/info/{{packageName}}?fields=channel-map",
+      "format": "json",
+      "transformTemplates": [
+        "{\"releases\": [{\"version\": $string($$.(`channel-map`[channel.risk = 'edge' and channel.track = 'latest' and channel.base.architecture = 'amd64' and channel.base.channel = '24.04'].revision.revision))}]}"
+      ]
+    }
+  },
   "customManagers": [
     {
       "customType": "regex",
@@ -15,12 +24,20 @@
       ],
       "matchStringsStrategy": "any",
       "versioningTemplate": "ubuntu"
+    },
+    {
+      "customType": "regex",
+      "fileMatch": ["\\.tftest\\.hcl$", "\\.tf$"],
+      "matchStrings": ["# renovate: depName=\"(?<packageName>[^\"]+)\"\\s*\\n\\s*(?<fieldName>[a-zA-Z0-9_]+)\\s*=\\s*(?<currentValue>\\d+)"],
+      "versioningTemplate": "semver-coerced",
+      "datasourceTemplate": "custom.charmhub"
     }
   ],
   "extends": [
     "config:recommended",
     "group:allNonMajor"
   ],
+  "ignorePaths": [],
   "packageRules": [
     {
       "enabled": true,
@@ -29,6 +46,13 @@
       ],
       "pinDigests": true
     },
+    {
+      "matchDatasources": [
+        "custom.charmhub"
+      ],
+      "automerge": true,
+      "enabled": true
+    },
     {
       "enabled": false,
       "matchFileNames": [
@@ -39,15 +63,6 @@
         "minor",
         "patch"
       ]
-    },
-    {
-      "enabled": true,
-      "matchDatasources": [
-        "terraform-provider"
-      ],
-      "matchPackageNames": [
-        "juju/juju"
-      ]
     }
   ],
   "schedule": [

terraform/.tflint.hcl

@@ -2,5 +2,5 @@
 # See LICENSE file for licensing details.
 
 rule "terraform_required_version" {
-  enabled = false
+  enabled = true
 }

terraform/README.md

@@ -1,8 +1,8 @@
-<!-- Remember to update this file for your charm -- replace __charm_name__ with the appropriate name. -->
+<!-- Remember to update this file for your charm -- replace mattermost-k8s with the appropriate name. -->
 
-# __charm_name__ Terraform module
+# mattermost-k8s Terraform module
 
-This folder contains a base [Terraform][Terraform] module for the __charm_name__ charm.
+This folder contains a base [Terraform][Terraform] module for the mattermost-k8s charm.
 
 The module uses the [Terraform Juju provider][Terraform Juju provider] to model the charm
 deployment onto any Kubernetes environment managed by [Juju][Juju].
@@ -17,18 +17,18 @@ deployment onto any Kubernetes environment managed by [Juju][Juju].
   the Juju application name.
 - **versions.tf** - Defines the Terraform provider version.
 
-## Using __charm_name__ base module in higher level modules
+## Using mattermost-k8s base module in higher level modules
 
-If you want to use `__charm_name__` base module as part of your Terraform module, import it
+If you want to use `mattermost-k8s` base module as part of your Terraform module, import it
 like shown below:
 
 ```text
 data "juju_model" "my_model" {
   name = var.model
 }
 
-module "__charm_name__" {
-  source = "git::https://github.com/canonical/__charm_name__-operator//terraform"
+module "mattermost-k8s" {
+  source = "git::https://github.com/canonical/mattermost-k8s-operator//terraform"
 
   model = juju_model.my_model.name
   # (Customize configuration variables here if needed)
@@ -38,11 +38,11 @@ module "__charm_name__" {
 Create integrations, for instance:
 
 ```text
-resource "juju_integration" "__charm_name__-loki" {
+resource "juju_integration" "mattermost-k8s-loki" {
   model = juju_model.my_model.name
   application {
-    name     = module.__charm_name__.app_name
-    endpoint = module.__charm_name__.endpoints.logging
+    name     = module.mattermost-k8s.app_name
+    endpoint = module.mattermost-k8s.endpoints.logging
   }
   application {
     name     = "loki-k8s"
@@ -51,9 +51,9 @@ resource "juju_integration" "__charm_name__-loki" {
 }
 ```
 
-The complete list of available integrations can be found [in the Integrations tab][__charm_name__-integrations].
+The complete list of available integrations can be found [in the Integrations tab][mattermost-k8s-integrations].
 
 [Terraform]: https://developer.hashicorp.com/terraform
 [Terraform Juju provider]: https://registry.terraform.io/providers/juju/juju/latest
 [Juju]: https://juju.is
-[__charm_name__-integrations]: https://charmhub.io/__charm_name__/integrations
+[mattermost-k8s-integrations]: https://charmhub.io/mattermost-k8s/integrations

terraform/main.tf

@@ -1,12 +1,12 @@
 # Copyright 2025 Canonical Ltd.
 # See LICENSE file for licensing details.
 
-resource "juju_application" "__charm_name__" {
-  name  = var.app_name
-  model = var.model
+resource "juju_application" "mattermost_k8s" {
+  name       = var.app_name
+  model_uuid = var.model_uuid
 
   charm {
-    name     = "__charm_name__"
+    name     = "mattermost-k8s"
     channel  = var.channel
     revision = var.revision
     base     = var.base

terraform/outputs.tf

@@ -3,7 +3,7 @@
 
 output "app_name" {
   description = "Name of the deployed application."
-  value       = juju_application.__charm_name__.name
+  value       = juju_application.mattermost_k8s.name
 }
 
 output "endpoints" {

terraform/tests/.tflint.hcl

@@ -2,5 +2,5 @@
 # See LICENSE file for licensing details.
 
 rule "terraform_required_version" {
-  enabled = false
+  enabled = true
 }

terraform/tests/main.tftest.hcl

@@ -1,15 +1,23 @@
 # Copyright 2025 Canonical Ltd.
 # See LICENSE file for licensing details.
 
-variables {
-  channel = "latest/edge"
-  # renovate: depName="__charm_name__"
-  revision = 1
+run "setup_tests" {
+  module {
+    source = "./tests/setup"
+  }
 }
 
 run "basic_deploy" {
+  variables {
+    model_uuid = run.setup_tests.model_uuid
+    channel    = "latest/edge"
+    # renovate: depName="mattermost-k8s"
+    revision = 18
+  }
+
   assert {
-    condition     = module.__charm_name__.app_name == "__charm_name__"
-    error_message = "__charm_name__ app_name did not match expected"
+    condition     = output.app_name == "mattermost-k8s"
+    error_message = "mattermost-k8s app_name did not match expected"
   }
 }
+

terraform/tests/setup/main.tf

@@ -0,0 +1,22 @@
+# Copyright 2025 Canonical Ltd.
+# See LICENSE file for licensing details.
+
+terraform {
+  required_version = "~> 1.12"
+  required_providers {
+    juju = {
+      version = "~> 1.0"
+      source  = "juju/juju"
+    }
+  }
+}
+
+provider "juju" {}
+
+resource "juju_model" "test_model" {
+  name = "tf-testing-${formatdate("YYYYMMDDhhmmss", timestamp())}"
+}
+
+output "model_uuid" {
+  value = juju_model.test_model.uuid
+}

terraform/variables.tf

@@ -4,7 +4,7 @@
 variable "app_name" {
   description = "Name of the application in the Juju model."
   type        = string
-  default     = "__charm_name__"
+  default     = "mattermost-k8s"
 }
 
 variable "base" {
@@ -20,7 +20,7 @@ variable "channel" {
 }
 
 variable "config" {
-  description = "Application config. Details about available options can be found at https://charmhub.io/__charm_name__/configurations."
+  description = "Application config. Details about available options can be found at https://charmhub.io/mattermost-k8s/configurations."
   type        = map(string)
   default     = {}
 }
@@ -31,8 +31,8 @@ variable "constraints" {
   default     = ""
 }
 
-variable "model" {
-  description = "Reference to a `juju_model`."
+variable "model_uuid" {
+  description = "UUID of the Juju model to deploy the application into."
   type        = string
 }
 

terraform/versions.tf

@@ -2,10 +2,11 @@
 # See LICENSE file for licensing details.
 
 terraform {
+  required_version = "~> 1.12"
   required_providers {
     juju = {
       source  = "juju/juju"
-      version = ">= 0.20.0"
+      version = "~> 1.0"
     }
   }
 }