only download ora when it hasn't already been downloaded

playbooks/roles/discern/tasks/deploy.yml

@@ -41,7 +41,7 @@
     - deploy
 
 #Numpy has to be a pre-requirement in order for scipy to build
-- name : install python pre-requirements for discern and ease
+- name : discern | install python pre-requirements for discern and ease
   pip: requirements={{item}} virtualenv={{ discern_venv_dir }} state=present
   sudo_user: "{{ discern_user }}"
   notify:
@@ -52,7 +52,7 @@
   tags:
     - deploy
 
-- name : install python requirements for discern and ease
+- name : discern | install python requirements for discern and ease
   pip: requirements={{item}} virtualenv={{ discern_venv_dir }} state=present
   sudo_user: "{{ discern_user }}"
   notify:
@@ -75,6 +75,7 @@
 - name: discern | install nltk data using rendered shell script
   shell: >
     {{ discern_venv_dir }}/bin/python -m nltk.downloader -d {{ discern_nltk_data_dir }} all
+      creates={{ discern_nltk_data_dir }}/taggers/maxent_treebank_pos_tagger/english.pickle
   sudo_user: "{{ discern_user }}"
   notify:
     - discern | restart discern

playbooks/roles/ora/tasks/ease.yml

@@ -48,20 +48,10 @@
   tags:
   - deploy
 
-#Needed for the ease package to work
-- name: ora | check for the existence of nltk data taggers/maxent_treebank_pos_tagger/english.pickle
-  shell: "[ -f {{ ora_nltk_data_dir }}/taggers/maxent_treebank_pos_tagger/english.pickle ] && echo 'Found' || echo ''"
-  register: ora_nltk_data_installed
-  notify:
-    - ora | restart ora
-    - ora | restart ora_celery
-  tags:
-  - deploy
-
-
 - name: ora | install nltk data using rendered shell script
-  command: "{{ora_ease_venv_dir}}/bin/python -m nltk.downloader -d {{ ora_nltk_data_dir }} all"
-  when: ora_nltk_data_installed.stdout  != "Found"
+  command: >
+    "{{ora_ease_venv_dir}}/bin/python -m nltk.downloader -d {{ ora_nltk_data_dir }} all"
+      creates={{ ora_nltk_data_dir }}/taggers/maxent_treebank_pos_tagger/english.pickle
   sudo_user: "{{ common_web_user }}"
   notify:
     - ora | restart ora