finish adding terraform and vault archive

tasks/archive/terraform.yml

@@ -1,13 +1,38 @@
-- name: Download terraform archive
-  ansible.builtin.get_url:
-    dest: "{{ d_tempdir.path }}/{{ terraform.file }}"
-    url: "{{ terraform.url }}/{{ terraform.file }}"
-    decompress: false
-    mode: '0644'
+# vim: set filetype=yaml.ansible :
+---
+- name: Check if terraform is already installed
+  register: r_terraform_inst
+  ansible.builtin.stat:
+    path: "{{ terraform.bin }}"
 
-- name: Extract terraform archive
-  become: "{{ ext_become }}"
-  ansible.builtin.unarchive:
-    dest: "{{ path.archive }}/terraform"
-    src: "{{ d_tempdir.path }}/{{ terraform.file }}"
-    remote_src: true
+- name: Download and install terraform
+  when:
+    - not r_terraform_inst.stat.exists
+  block:
+    - name: Download terraform archive
+      ansible.builtin.get_url:
+        dest: "{{ d_tempdir.path }}/{{ terraform.archive }}"
+        url: "{{ terraform.url }}/{{ terraform.archive }}"
+        mode: '0644'
+        decompress: false
+
+    - name: Ensure vault archive dir exists
+      become: "{{ ext_become }}"
+      ansible.builtin.file:
+        state: directory
+        path: "{{ terraform.path }}"
+        mode: '0755'
+
+    - name: Extract terraform archive
+      become: "{{ ext_become }}"
+      ansible.builtin.unarchive:
+        dest: "{{ terraform.path }}"
+        src: "{{ d_tempdir.path }}/{{ terraform.archive }}"
+        remote_src: true
+
+    - name: Link terraform executable
+      become: "{{ ext_become }}"
+      ansible.builtin.file:
+        state: link
+        src: "{{ terraform.path }}/terraform"
+        path: "{{ terraform.bin }}"