Allow explicit override for mgmt_hieradata

ansible-role-puppet attempts to infer where it should copy hieradata
from based on puppet3 or puppet4. However, for hosts that are not
running puppet themselves this isn't going to work very well. Allow a
user to set mgmt_hieradata explicity.

Change-Id: Ie533da9af71ab84ce6e95dc63ceb8426740f53a3

tasks/main.yml

@@ -1,17 +1,25 @@
 ---
-- name: Get management server puppet version
-  shell:
-    cmd: "PATH=$PATH:/opt/puppetlabs/bin puppet --version | cut -d '.' -f 1"
-  delegate_to: localhost
-  register: mgmt_puppet_version
+- block:
 
-- name: Set management server puppet version fact
-  set_fact:
-    mgmt_puppet_version: "{{ mgmt_puppet_version.stdout }}"
+  - name: Get management server puppet version
+    shell:
+      cmd: "PATH=$PATH:/opt/puppetlabs/bin puppet --version | cut -d '.' -f 1"
+    delegate_to: localhost
+    register: mgmt_puppet_version
 
-- name: Sanity check management server puppet version
-  fail: "Unsupported puppet version {{ mgmt_puppet_version }}"
-  when: (mgmt_puppet_version != '3' and mgmt_puppet_version != '4')
+  - name: Set management server puppet version fact
+    set_fact:
+      mgmt_puppet_version: "{{ mgmt_puppet_version.stdout }}"
+
+  - name: Sanity check management server puppet version
+    fail: "Unsupported puppet version {{ mgmt_puppet_version }}"
+    when: (mgmt_puppet_version != '3' and mgmt_puppet_version != '4')
+
+  - name: Set management server hieradata var
+    set_fact:
+      mgmt_hieradata: "{{ '/etc/puppet/hieradata/' + puppet_environment if mgmt_puppet_version == '3' else '/etc/puppetlabs/code/environments/' + puppet_environment + '/hieradata' }}"
+
+  when: mgmt_hieradata is not defined
 
 - name: Get puppet version
   shell:
@@ -27,10 +35,6 @@
   when: (puppet_version != '3' and puppet_version != '4')
 
 - block:
-  - name: Set management server hieradata var
-    set_fact:
-      mgmt_hieradata: "{{ '/etc/puppet/hieradata/' + puppet_environment if mgmt_puppet_version == '3' else '/etc/puppetlabs/code/environments/' + puppet_environment + '/hieradata' }}"
-    delegate_to: localhost
 
   - name: Set hieradata var
     set_fact:
@@ -51,7 +55,7 @@
     puppet_get_hiera_file_list:
       fqdn: "{{ ansible_fqdn }}"
       groups: "{{ hostvars[inventory_hostname].group_names }}"
-      location: "{{ hieradata }}"
+      location: "{{ mgmt_hieradata }}"
     delegate_to: localhost
     register: hiera_file_paths