install go only if version is different from desired

tasks/build/go.yml

@@ -3,54 +3,63 @@
     file: go.yml
     name: _go
 
-- name: set go arch
-  ansible.builtin.set_fact:
-    arch: "{{ _go.archmap[ansible_architecture] }}"
-
-- name: set go archive filename
-  ansible.builtin.set_fact:
-    go_archive: "go{{ _go.version }}.{{ ansible_system | lower }}-{{ arch }}.{{ _go.extmap[ansible_system] }}"
-  tags:
-    - dev
-    - go
-    - debug
-
-- name: create temp path
-  ansible.builtin.tempfile:
-    state: directory
-    prefix: go_dl.
-  register: d_go_dl_tmp
-
-- name: download go archive
-  become: true
-  ansible.builtin.get_url:
-    dest: "{{ d_go_dl_tmp.path }}/{{ go_archive }}"
-    url: "https://go.dev/dl/{{ go_archive }}"
-    checksum: "{{ _go[_go.version][ansible_system][arch] }}"
-    decompress: false
-  tags:
-    - dev
-    - go
-
-- name: ensure go install dir exists
-  become: true
-  ansible.builtin.file:
-    path: "{{ _go.install_path }}"
-    state: directory
-
-- name: extract go package
-  ansible.builtin.unarchive:
-    dest: "{{ _go.install_path }}"
-    src: "{{ d_go_dl_tmp.path }}/{{ go_archive }}"
-    remote_src: true
-  when: ansible_system == 'Linux'
-  become: true
-
-- name: install go macOS use pkg file
+- name: check go version
   ansible.builtin.command:
-    cmd: "installer -pkg {{ d_go_dl_tmp.path }}/{{ go_archive }} -target /"
-  when: ansible_system == 'Darwin'
-  become: true
-  tags:
-    - dev
-    - go
+    cmd: "go version"
+  register: r_go_version
+  ignore_errors: true
+
+- name: install/update go
+  when: "'{{ _go.version }}' not in r_go_version.stdout"
+  block:
+    - name: set go arch
+      ansible.builtin.set_fact:
+        arch: "{{ _go.archmap[ansible_architecture] }}"
+    
+    - name: set go archive filename
+      ansible.builtin.set_fact:
+        go_archive: "go{{ _go.version }}.{{ ansible_system | lower }}-{{ arch }}.{{ _go.extmap[ansible_system] }}"
+      tags:
+        - dev
+        - go
+        - debug
+    
+    - name: create temp path
+      ansible.builtin.tempfile:
+        state: directory
+        prefix: go_dl.
+      register: d_go_dl_tmp
+    
+    - name: download go archive
+      become: true
+      ansible.builtin.get_url:
+        dest: "{{ d_go_dl_tmp.path }}/{{ go_archive }}"
+        url: "https://go.dev/dl/{{ go_archive }}"
+        checksum: "{{ _go[_go.version][ansible_system][arch] }}"
+        decompress: false
+      tags:
+        - dev
+        - go
+    
+    - name: ensure go install dir exists
+      become: true
+      ansible.builtin.file:
+        path: "{{ _go.install_path }}"
+        state: directory
+    
+    - name: extract go package
+      ansible.builtin.unarchive:
+        dest: "{{ _go.install_path }}"
+        src: "{{ d_go_dl_tmp.path }}/{{ go_archive }}"
+        remote_src: true
+      when: ansible_system == 'Linux'
+      become: true
+    
+    - name: install go macOS use pkg file
+      ansible.builtin.command:
+        cmd: "installer -pkg {{ d_go_dl_tmp.path }}/{{ go_archive }} -target /"
+      when: ansible_system == 'Darwin'
+      become: true
+      tags:
+        - dev
+        - go