Prepare Version 0.14.0

Per [dicsuccion](https://github.com/netbox-community/netbox-docker/pull/137#issuecomment-495667921) with @cimnine, changing the API endpoint to one that retains functionality of previous URL while supporting both HEADS and TAGS

Dockerfile

@@ -29,20 +29,34 @@ RUN pip install \
 # django-rq is used for webhooks
       django-rq
 
+ARG BRANCH=master
+
+WORKDIR /tmp
+
+# As the requirements don't change very often,
+# and as they take some time to compile,
+# we try to cache them very agressively.
+ARG REQUIREMENTS_URL=https://raw.githubusercontent.com/digitalocean/netbox/$BRANCH/requirements.txt
+ADD ${REQUIREMENTS_URL} requirements.txt
+RUN pip install -r requirements.txt
+
+# Cache bust when the upstream branch changes:
+# ADD will fetch the file and check if it has changed
+# If not, Docker will use the existing build cache.
+# If yes, Docker will bust the cache and run every build step from here on.
+ARG REF_URL=https://api.github.com/repos/digitalocean/netbox/contents?ref=$BRANCH
+ADD ${REF_URL} version.json
+
 WORKDIR /opt
 
-ARG BRANCH=master
 ARG URL=https://github.com/digitalocean/netbox/archive/$BRANCH.tar.gz
 RUN wget -q -O - "${URL}" | tar xz \
   && mv netbox* netbox
 
-WORKDIR /opt/netbox
-RUN pip install -r requirements.txt
-
 COPY docker/configuration.docker.py /opt/netbox/netbox/netbox/configuration.py
 COPY configuration/gunicorn_config.py /etc/netbox/config/
 COPY docker/nginx.conf /etc/netbox-nginx/nginx.conf
-COPY docker/docker-entrypoint.sh docker-entrypoint.sh
+COPY docker/docker-entrypoint.sh /opt/netbox/docker-entrypoint.sh
 COPY startup_scripts/ /opt/netbox/startup_scripts/
 COPY initializers/ /opt/netbox/initializers/
 COPY configuration/configuration.py /etc/netbox/config/configuration.py

README.md

@@ -385,6 +385,8 @@ Compare the version with the list below to check whether a breaking change was i
 
 The following is a list of breaking changes of the `netbox-docker` project:
 
+* 0.14.0: Improved caching strategy [#137][137] [#136][136].
+  New `AUTH_LDAP_GROUP_TYPE` environment variable [#135][135].
 * 0.13.0: `AUTH_LDAP_BIND_PASSWORD` can now be extracted into a secrets file. [#133][133]
 * 0.12.0: A new flag `REDIS_SSL=false` was added to the `env/netbox.env` file. [#129][129]
 * 0.11.0: The docker-compose file now marks volumes as shared (`:z`). This should prevent SELinux problems [#131][131]
@@ -404,6 +406,9 @@ The following is a list of breaking changes of the `netbox-docker` project:
 [131]: https://github.com/netbox-community/netbox-docker/pull/131
 [129]: https://github.com/netbox-community/netbox-docker/pull/129
 [133]: https://github.com/netbox-community/netbox-docker/pull/133
+[135]: https://github.com/netbox-community/netbox-docker/pull/135
+[136]: https://github.com/netbox-community/netbox-docker/pull/136
+[137]: https://github.com/netbox-community/netbox-docker/pull/137
 
 ## Rebuilding & Publishing images
 

VERSION

@@ -1 +1 @@
-0.13.0
+0.14.0

configuration/ldap_config.py

@@ -1,7 +1,8 @@
 import ldap
 import os
 
-from django_auth_ldap.config import LDAPSearch, GroupOfNamesType
+from django_auth_ldap.config import LDAPSearch
+from importlib import import_module
 
 # Read secret from file
 def read_secret(secret_name):
@@ -13,6 +14,14 @@ def read_secret(secret_name):
         with f:
             return f.readline().strip()
 
+# Import and return the group type based on string name
+def import_group_type(group_type_name):
+    mod = import_module('django_auth_ldap.config')
+    try:
+        return getattr(mod, group_type_name)()
+    except:
+        return None
+
 # Server URI
 AUTH_LDAP_SERVER_URI = os.environ.get('AUTH_LDAP_SERVER_URI', '')
 
@@ -45,7 +54,7 @@ AUTH_LDAP_GROUP_SEARCH_BASEDN = os.environ.get('AUTH_LDAP_GROUP_SEARCH_BASEDN',
 AUTH_LDAP_GROUP_SEARCH_CLASS = os.environ.get('AUTH_LDAP_GROUP_SEARCH_CLASS', 'group')
 AUTH_LDAP_GROUP_SEARCH = LDAPSearch(AUTH_LDAP_GROUP_SEARCH_BASEDN, ldap.SCOPE_SUBTREE,
                                     "(objectClass=" + AUTH_LDAP_GROUP_SEARCH_CLASS + ")")
-AUTH_LDAP_GROUP_TYPE = GroupOfNamesType()
+AUTH_LDAP_GROUP_TYPE = import_group_type(os.environ.get('AUTH_LDAP_GROUP_TYPE', 'GroupOfNamesType'))
 
 # Define a group required to login.
 AUTH_LDAP_REQUIRE_GROUP = os.environ.get('AUTH_LDAP_REQUIRE_GROUP_DN', '')