Added mongosh to mongo service and added test for mongodb with initial

user creation.

examples/mongodb/.test.sh

@@ -0,0 +1,61 @@
+#!/bin/sh
+set -x
+
+mongosh --version
+mongod --version
+
+# Start service in the background and store the PID
+echo "Starting mongo service..."
+devenv up&
+DEVENV_PID=$!
+
+check_mongo_status() {
+    echo "Waiting for service to become available..."
+    MONGO_OUTPUT=$(mongosh --quiet --eval "{ ping: 1 }" 2>&1)
+    MONGO_EXIT_STATUS=$?
+}
+
+check_if_mongo_user_created() {
+    # This line queries mongo using the shell and trims the output to make sure
+    # it is either an empty string or the created user document
+    createdUser=$(echo "use admin\n db.system.users.find({ user: \"mongouser\", db: \"admin\", \"roles.role\": \"root\", \"roles.db\": \"admin\" })" | mongosh --quiet --eval --shell | tail -n +2 | sed 's/^admin> //')
+
+    if [ -n "$createdUser" ]; then
+       MONGO_EXIT_STATUS=0
+    else
+       MONGO_EXIT_STATUS=1
+    fi
+}
+
+# Just to allow the service some time to start up 
+sleep 10
+
+for i in $(seq 1 10); do
+    check_mongo_status
+    if [ $MONGO_EXIT_STATUS -eq 0 ]; then
+        echo "Service is up..."
+        break
+    else
+        sleep 1
+    fi
+done
+
+echo "Startup complete..."
+echo "Checking for initial user creation..."
+for i in $(seq 1 10); do
+    check_if_mongo_user_created
+    if [ $MONGO_EXIT_STATUS -eq 0 ]; then
+        echo "Initial user created..."
+        break
+    else
+        sleep 1
+    fi
+done
+
+echo 'Killing service...'
+pkill -P $DEVENV_PID
+wait $DEVENV_PID 2>&1 >/dev/null
+
+# Exit the script
+exit $MONGO_EXIT_STATUS
+

examples/mongodb/devenv.nix

@@ -0,0 +1,9 @@
+{ pkgs, config, ... }:
+
+{
+  services.mongodb = {
+    enable = true;
+    initDatabaseUsername = "mongouser";
+    initDatabasePassword = "secret";
+  };
+}

examples/mongodb/devenv.yaml

@@ -0,0 +1,4 @@
+allowUnfree: true
+inputs:
+  nixpkgs:
+    url: github:NixOS/nixpkgs/nixpkgs-unstable

src/modules/services/mongodb.nix

@@ -37,13 +37,14 @@ let
        fi
     done
 
-    while ! mongo --quiet --eval "{ ping: 1 }" ''${mongoShellArgs} 2>&1 >/dev/null ; do
+    while ! ${pkgs.mongosh}/bin/mongosh --quiet --eval "{ ping: 1 }" ''${mongoShellArgs} 2>&1 >/dev/null ; do
         sleep 1
     done
 
     if [ "${cfg.initDatabaseUsername}" ] && [ "${cfg.initDatabasePassword}" ]; then
+        echo "Creating initial user"
         rootAuthDatabase="admin"
-        mongo ''${mongoShellArgs} "$rootAuthDatabase" >/dev/null <<-EOJS
+        ${pkgs.mongosh}/bin/mongosh ''${mongoShellArgs} "$rootAuthDatabase" >/dev/null <<-EOJS
             db.createUser({
                 user: "${cfg.initDatabaseUsername}",
                 pwd: "${cfg.initDatabasePassword}",``
@@ -105,7 +106,7 @@ in
   };
 
   config = lib.mkIf cfg.enable {
-    packages = [ cfg.package pkgs.mongodb-tools ];
+    packages = [ cfg.package pkgs.mongodb-tools pkgs.mongosh ];
 
     env.MONGODBDATA = config.env.DEVENV_STATE + "/mongodb";