terraform installation

defaults/main.yaml

@@ -1 +1,2 @@
 ---
+terraform_version: 0.12.24 # "{{ terraform_latest_version }}"

tasks/main.yaml

@@ -1 +1,45 @@
 ---
+
+- name: required debian packages
+  apt:
+    pkg:
+      # ansible
+      - unzip
+
+- name: get latest terraform release version
+  uri:
+    url: https://checkpoint-api.hashicorp.com/v1/check/terraform
+  register: terraform_release_query
+
+- name: check if terraform version matches
+  command: terraform --version
+  failed_when: False
+  changed_when: False
+  register: terraform_version_command
+
+- name: get terraform release checksums
+  uri:
+    url: "https://releases.hashicorp.com/terraform/{{ terraform_version }}/terraform_{{ terraform_version }}_SHA256SUMS"
+    return_content: yes
+  register: terraform_release_checksums_uri
+
+- debug:
+    msg:
+      terraform_current_version: "{{ terraform_current_version }}"
+      ansible_architecture: "{{ ansible_architecture }}"
+      terraform_download_checksum: "{{ terraform_download_checksum }}"
+      terraform_download_filename: "{{ terraform_download_filename }}"
+      terraform_download_checksum: "{{ terraform_download_checksum }}"
+
+- name: download terraform release
+  get_url:
+    url: "{{ terraform_download_url }}"
+    dest: "{{ terraform_download_dest }}"
+    checksum: "{{ terraform_download_checksum }}"
+  register: terraform_download
+
+- name: extract and install Terraform
+  unarchive:
+    src: "{{terraform_download_dest}}"
+    dest: /usr/local/bin
+    copy: no

vars/main.yaml

@@ -1 +1,11 @@
 ---
+terraform_latest_version: "{{terraform_release.json.current_version}}"
+terraform_current_version: "{{ terraform_version_command }}"
+terraform_ansible_architecture_map:
+  x86_64: amd64
+terraform_architecture: "{{ terraform_ansible_architecture_map[ansible_architecture] }}"
+terraform_download_checksum_line: "{{ terraform_release_checksums_uri.content.split('\n')|select('match', '^[0-9a-fA-F]+ +(terraform_'+terraform_version+'_linux_'+terraform_architecture+'.zip)') | first }}"
+terraform_download_filename: "{{ terraform_download_checksum_line | regex_replace('^[0-9a-fA-F]+ +(terraform_'+terraform_version+'_linux_'+terraform_architecture+'.zip)','\\1') }}"
+terraform_download_checksum: "sha256:{{ terraform_download_checksum_line | regex_replace('^([0-9a-fA-F]+) +terraform_'+terraform_version+'_linux_'+terraform_architecture+'.zip','\\1') }}"
+terraform_download_url: "https://releases.hashicorp.com/terraform/{{ terraform_version }}/{{terraform_download_filename}}"
+terraform_download_dest: "/usr/local/src/{{terraform_download_filename}}"