Fix homebrew and git installation

RE #62

jenkins-node/mantid-builder-macos/ansible/requirements.yml

@@ -0,0 +1,3 @@
+---
+collections:
+  - name: geerlingguy.mac

jenkins-node/mantid-builder-macos/ansible/roles/agent/tasks/main.yml

@@ -1,48 +1,47 @@
 ---
+# Deploy Jenkins agent on macOS
 
-- name: Deploy Jenkins agent on macOS
-  tasks:
-    # Install Requirements
+# Install Requirements
 
-    - name: Install homebrew
-      include_role:
-        name: geerlingguy.mac.homebrew
-
-    - name: Make sure homebrew bin is in the path
-      ansible.builtin.lineinfile:
-        path: /etc/paths
-        state: present
-        line: '/opt/homebrew/bin'
-      become: true
-      become_user: root
-
-    - name: Install git
-      community.general.homebrew:
-        name: git
-        state: latest
-
-    - name: Install Java 11
-      community.general.homebrew:
-        name: java11
-        state: present
-
-    # Configure macOS Settings
-
-    - name: Disable screensaver
-      shell: defaults write com.apple.screensaver idleTime 0
-
-    - name: Disable saved application states to avoid dialog
-      shell: defaults write org.python.python NSQuitAlwaysKeepsWindows -bool false
+- name: Install homebrew
+  include_role:
+    name: geerlingguy.mac.homebrew
+
+- name: Make sure homebrew bin is in the path
+  ansible.builtin.lineinfile:
+    path: /etc/paths
+    state: present
+    line: '/opt/homebrew/bin'
+  become: true
+  become_user: root
+
+- name: Install git
+  community.general.homebrew:
+    name: git
+    state: latest
+
+- name: Install Java 11
+  community.general.homebrew:
+    name: java11
+    state: present
+
+# Configure macOS Settings
+
+- name: Disable screensaver
+  shell: defaults write com.apple.screensaver idleTime 0
+
+- name: Disable saved application states to avoid dialog
+  shell: defaults write org.python.python NSQuitAlwaysKeepsWindows -bool false
 
-    # TODO: Disable autolock (this seems to change between versions, so might not be possible to script)
+# TODO: Disable autolock (this seems to change between versions, so might not be possible to script)
 
-    - name: Download jenkins slave script
-      shell: curl -o ~/jenkins-slave.sh https://raw.githubusercontent.com/mantidproject/mantid/main/buildconfig/Jenkins/jenkins-slave.sh
-    
-    - name: Start script as chrontab entry
-      ansible.builtin.cron:
-        name: "Run slave script"
-        minute: "*/5"
-        job: "$HOME/jenkins-slave.sh {{ agent_name }} {{ agent_secret }}"
+- name: Download jenkins slave script
+  shell: curl -o ~/jenkins-slave.sh https://raw.githubusercontent.com/mantidproject/mantid/main/buildconfig/Jenkins/jenkins-slave.sh
+
+- name: Start script as chrontab entry
+  ansible.builtin.cron:
+    name: "Run slave script"
+    minute: "*/5"
+    job: "$HOME/jenkins-slave.sh {{ agent_name }} {{ agent_secret }}"