composer: Upgrade only if requested

roles/composer/defaults/main.yaml

@@ -0,0 +1,2 @@
+---
+composer_upgrade: false

roles/composer/meta/argument_specs.yaml

@@ -0,0 +1,10 @@
+---
+argument_specs:
+  main:
+    description: Installs composer if not already installed system-wide
+    options:
+      composer_upgrade:
+        description: Whether to upgrade composer to the latest version if already installed
+        type: bool
+        required: false
+        default: false

roles/composer/tasks/main.yml

@@ -1,20 +1,24 @@
 ---
-
 - name: Test if composer is installed system-wide
-  stat:
+  ansible.builtin.stat:
     path: /usr/bin/composer
-  register: global_composer
+  register: _composer_global_executable
 
-- block:
-  - name: Download latest version of composer locally
-    get_url:
-      url: https://getcomposer.org/download/latest-stable/composer.phar
-      dest: "{{ ansible_user_dir }}/.local/bin/composer"
-      mode: 0755
+- name: Install composer for user
+  when: not _composer_global_executable.stat.exists
+  block:
+    - name: Check if composer installed
+      ansible.builtin.stat:
+        path: "{{ ansible_user_dir }}/.local/bin/composer"
+      register: _composer_user_executable
 
-  - name: Set composer path to use local installation
-    set_fact:
-      composer_path: "{{ ansible_user_dir }}/.local/bin/composer"
-  
-  when: not global_composer.stat.exists
+    - name: Download latest version of composer locally
+      ansible.builtin.get_url:
+        url: https://getcomposer.org/download/latest-stable/composer.phar
+        dest: "{{ ansible_user_dir }}/.local/bin/composer"
+        mode: "0755"
+      when: (not _composer_user_executable.stat.exists) or composer_upgrade
 
+    - name: Set composer path to use local installation
+      ansible.builtin.set_fact:
+        composer_path: "{{ ansible_user_dir }}/.local/bin/composer"

roles/kimai/meta/main.yaml

@@ -1,3 +1,4 @@
 ---
 dependencies:
-  - composer
+  - role: composer
+    composer_upgrade: "{{ kimai_upgrade }}"