DCD-224: Refactor of product installer role.

roles/product_install/tasks/main.yml

@@ -1,14 +1,97 @@
 ---
 
-# Common case for most products and Jira editions.
-- name: Fetch ServiceDesk metadata if necessary
-  include_tasks: "servicedesk_download.yml"
-  when: atl_product_edition == "jira-servicedesk"
+- name: Create installation directories
+  file:
+    path: "{{ item }}"
+    state: directory
+    mode: 0750
+    owner: "{{ atl_product_user }}"
+    group: "{{ atl_product_user }}"
+  with_items:
+    - "{{ atl_installer_temp }}"
+    - "{{ atl_product_home }}"
+    - "{{ atl_product_installation_versioned }}"
+    - "{{ atl_product_version_cache_dir }}"
+  changed_when: false  # For Molecule idempotence check
 
-# Differences for ServiceDesk become fiddly enough that it's better to
-# just split them out and move common functionality into individual
-# task files. This gives us some flexibility in the future if
-# necessary.
-- name: Fetch product metadata if necessary
-  include_tasks: "product_download.yml"
-  when: atl_product_edition != "jira-servicedesk"
+
+- name: Check for existing version cache file
+  stat:
+    path: "{{ atl_product_version_cache }}"
+  register: cached
+
+# Case: File exists, always use its value
+- name: Use version for product version
+  block:
+
+    - name: Read cached version from file
+      command: "cat {{ atl_product_version_cache }}"
+      register: atl_product_version_file
+      changed_when: false
+
+    - name: Set the local var to cached version
+      set_fact:
+        atl_product_version: "{{ atl_product_version_file.stdout }}"
+
+  when: cached.stat.exists
+
+
+# Case: File doesn't exist and no version has been set; find latest.
+- name: Fetch and cache latest version when no override
+  block:
+
+    - name: Fetch the latest edition version
+      include_tasks: "{{ atl_product_edition }}_version_latest.yml"
+
+  when:
+    not cached.stat.exists and
+    (atl_product_version is undefined or
+     not atl_product_version or
+     atl_product_version == "latest")
+
+
+- name: Perform any additional per-edition version setup
+  include_tasks: "{{ atl_product_edition }}_extra_tasks.yml"
+
+
+# At this point atl_product_version should be set, cache if necessary.
+- name: Write override cached version when specified
+  template:
+    src: version.j2
+    dest: "{{ atl_product_version_cache }}"
+    force: false
+
+# Note: We don't the cache binary in the shared drive to the complexity
+# around download race-conditions if multiple nodes are starting at
+# the same time. When downloading from product-downloads.atlassian.com
+# (which is a CDN) takes seconds anyway.
+- name: Fetch product installer
+  get_url:
+    url: "{{ atl_product_download_url }}"
+    dest: "{{ atl_product_download }}"
+    mode: 0755
+    force: false
+
+- name: Create installer varfile
+  template:
+    src: "{{ atl_product_family }}.varfile.j2"
+    dest: "{{ atl_product_varfile }}"
+    mode: 0755
+
+# NOTE: We run the installer as the user rather than root to limit its
+# actions. For example, if root and the 'jira' user exists then it
+# will create 'jira1'; this potentially creates idempotency/upgrade
+# issues down the line.
+- name: Run the installer
+  command: /bin/sh "{{ atl_product_download }}" -q -varfile "{{ atl_product_varfile }}"
+  args:
+    creates: "{{ atl_product_installation_versioned }}/.install4j/"
+  become: true
+  become_user: "{{ atl_product_user }}"
+
+- name: Symlink the installed version to current
+  file:
+    src: "{{ atl_product_installation_versioned }}"
+    dest: "{{ atl_product_installation_current }}"
+    state: link
+    force: true