Enable env var for auto creation of MSSQL_DB if var exists and db does not (#17)

Author: potatoqualitee

sqlinstance/Dockerfile

@@ -46,15 +46,16 @@ RUN /bin/bash /tmp/start-sql.sh
 FROM dbatools/mssqlbase
 COPY --from=builder /var/opt/mssql /var/opt/mssql
 COPY --from=builder /opt/mssql-tools/bin /opt/mssql-tools/bin
+COPY --from=builder /tmp/post-entrypoint.sh /opt/mssql/bin/post-entrypoint.sh
 
 # make a shared dir with the proper permissions
 USER root
 RUN  mkdir /shared; chown mssql /shared
 
 # run a rootless container
 USER mssql
-ENTRYPOINT /opt/mssql/bin/sqlservr
-# CMD exec /bin/bash -c "trap : TERM INT; sleep infinity & wait"
+# create a new database if env var is set
+ENTRYPOINT /opt/mssql/bin/sqlservr & /opt/mssql/bin/post-entrypoint.sh
 
 # label the container
 LABEL org.opencontainers.image.vendor="dbatools"

sqlinstance/scripts/post-entrypoint.sh

@@ -0,0 +1,23 @@
+# if an environment variable for newdb exists, create it
+if [ -n "${MSSQL_DB+1}" ]; then
+    # load up environment variables
+    export SQLCMDSERVER=localhost
+    export SQLCMDUSER=sqladmin
+    export SQLCMDPASSWORD=dbatools.IO
+    export PATH=$PATH:/opt/mssql-tools/bin
+
+    # wait for sql to be ready
+    for i in {1..30};
+    do
+        sqlcmd -S localhost -d master -Q "SELECT @@VERSION"
+        if [ $? -ne 0 ];then
+            sleep 2
+        fi
+    done
+
+    # create the db if it doesn't exist already
+    sqlcmd -S localhost -d master -Q "IF DB_ID (N'${MSSQL_DB}') IS NULL CREATE DATABASE ${MSSQL_DB};"
+fi
+
+# keep it going
+sleep infinity