Create /dracor dataset after server start

This removes support for the FUSEKI_DATASET_* env variable since we don't need it.

README.md

@@ -15,6 +15,9 @@ which is a [SPARQL 1.1](http://www.w3.org/TR/sparql11-overview/) server with a
 web interface, backed by the
 [Apache Jena TDB](https://jena.apache.org/documentation/tdb/) RDF triple store.
 
+The entrypoint for this image creates an empty dataset `/dracor` after starting
+the Fuseki server.
+
 ## License
 
 Different licenses apply to files added by different Docker layers:
@@ -111,14 +114,6 @@ volume `fuseki-data` as recommended above, do:
     docker rm fuseki
     docker run -d --name fuseki -p 3030:3030 --volumes-from fuseki-data dracor/fuseki
 
-## Create empty datasets
-
-You can create empty datasets at startup with:
-
-    docker run -d --name fuseki -p 3030:3030 -e FUSEKI_DATASET_1=mydataset -e FUSEKI_DATASET_2=otherdataset dracor/fuseki
-
-This will create 2 empty datasets: mydataset and otherdataset.
-
 ## Customizing Fuseki configuration
 
 If you need to modify Fuseki's configuration further, you can use the equivalent of:

entrypoint.sh

@@ -42,8 +42,6 @@ if [ -n "$ADMIN_PASSWORD" ] ; then
   export ADMIN_PASSWORD
   envsubst '${ADMIN_PASSWORD}' < "$FUSEKI_BASE/shiro.ini" > "$FUSEKI_BASE/shiro.ini.$$" && \
     mv "$FUSEKI_BASE/shiro.ini.$$" "$FUSEKI_BASE/shiro.ini"
-  unset ADMIN_PASSWORD # Don't keep it in memory
-  export ADMIN_PASSWORD
 fi
 
 # fork
@@ -62,14 +60,10 @@ while [[ $(curl -I http://localhost:3030 2>/dev/null | head -n 1 | cut -d$' ' -f
 done
 
 # Convert env to datasets
-printenv | egrep "^FUSEKI_DATASET_" | while read env_var
-do
-    dataset=$(echo $env_var | egrep -o "=.*$" | sed 's/^=//g')
-    curl -s 'http://localhost:3030/$/datasets'\
-         -H "Authorization: Basic $(echo -n admin:${ADMIN_PASSWORD} | base64)" \
-         -H 'Content-Type: application/x-www-form-urlencoded; charset=UTF-8'\
-         --data "dbName=${dataset}&dbType=${TDB_VERSION}"
-done
+curl -s 'http://localhost:3030/$/datasets'\
+  -H "Authorization: Basic $(echo -n admin:${ADMIN_PASSWORD} | base64)" \
+  -H 'Content-Type: application/x-www-form-urlencoded; charset=UTF-8'\
+  --data "dbName=/dracor&dbType=${TDB_VERSION}"
 
 # rejoin our exec
 wait