Install specific tag and set version env var for display on the homepage

ref Princeton-CDH/htr2hpc#10

inventory/group_vars/htr_staging/vars.yml

@@ -4,6 +4,10 @@ application_url: https://test-htr.princeton.edu
 
 # Git repository (on gitlab instead of github, so need to specify the full repo url)
 repo_url: https://gitlab.com/scripta/escriptorium.git
+# staging default branch is develop; install a specific tag for testing/documenting
+gitref: dev-0.14.2
+
+
 # repo variable is still needed for checkout file structure
 repo: scripta/escriptorium
 # name of django application
@@ -64,6 +68,7 @@ django_local_settings_template: "escriptorium_settings.py.j2"
 
 deploy_env_vars:
   DJANGO_SETTINGS_MODULE: escriptorium.local_settings
+  VERSION_DATE: "{{ gitref }}"  # deployed version, for display on home page
 
 # single deploy path - no versioning, no nesting
 deploy: "{{ install_root }}"

roles/django/templates/escriptorium_settings.py.j2

@@ -71,7 +71,7 @@ PUCAS_LDAP.update({
         "ldap3.princeton.edu",
         "ldap4.princeton.edu",
         "ldap5.princeton.edu"
-    ,
+    ],
      "SEARCH_BASE": "o=Princeton University,c=US",
      "SEARCH_FILTER": "(uid=%(user)s)",
 })