add ccache for macos

Author: George Adams

ansible/roles/baselayout/tasks/main.yml

@@ -73,6 +73,20 @@
     - "{{ packages[os|stripversion]|default('[]') }}"
     - "{{ common_packages|default('[]') }}"
 
+- name: Check whether /etc/paths contains "/usr/localopt/ccache/libexec" (macos)
+  when: os|startswith("macos")
+  command: grep -Fxq "/usr/localopt/ccache/libexec" /etc/paths
+  register: ccache_mac
+  check_mode: no
+  ignore_errors: yes
+  changed_when: no
+
+- name: add ccache to the path (macos)
+  when: ccache_mac.rc == 1
+  lineinfile: dest=/etc/paths
+    insertbefore=BOF
+    line='/usr/localopt/ccache/libexec'
+
 - name: update package alternatives
   when: os == "ubuntu1404"
   alternatives: link=/usr/bin/{{ gcc }} name={{ gcc }} path=/usr/bin/{{ gcc }}-4.9

ansible/roles/baselayout/vars/main.yml

@@ -91,6 +91,7 @@ packages: {
   macos: [
     'curl',
     'python2',
+    'ccache',
   ],
 
   smartos14: [