handle ephemeral model failures better

On an ephemeral model failure mark dependencies as being skipped due to errors, and log them.

dbt/node_runners.py

@@ -54,6 +54,7 @@ def __init__(self, config, adapter, node, node_index, num_nodes):
         self.num_nodes = num_nodes
 
         self.skip = False
+        self.skip_cause = None
 
     def raise_on_first_error(self):
         return False
@@ -170,15 +171,38 @@ def on_skip(self):
         schema_name = self.node.schema
         node_name = self.node.name
 
+        error = None
         if not self.is_ephemeral_model(self.node):
-            dbt.ui.printer.print_skip_line(self.node, schema_name, node_name,
-                                           self.node_index, self.num_nodes)
-
-        node_result = RunModelResult(self.node, skip=True)
+            if self.skip_cause is None:
+                dbt.ui.printer.print_skip_line(
+                    self.node,
+                    schema_name,
+                    node_name,
+                    self.node_index,
+                    self.num_nodes
+                )
+            else:
+                dbt.ui.printer.print_skip_caused_by_error(
+                    self.node,
+                    schema_name,
+                    node_name,
+                    self.node_index,
+                    self.num_nodes,
+                    self.skip_cause
+                )
+                # set an error so dbt will exit with an error code
+                error = (
+                    'Compilation Error in referenced ephemeral model {}.{}'
+                    .format(self.skip_cause.node.schema,
+                            self.skip_cause.node.name)
+                )
+
+        node_result = RunModelResult(self.node, skip=True, error=error)
         return node_result
 
-    def do_skip(self):
+    def do_skip(self, cause=None):
         self.skip = True
+        self.skip_cause = cause
 
     @classmethod
     def get_model_schemas(cls, manifest):

dbt/runner.py

@@ -122,18 +122,18 @@ def execute_nodes(self, linker, Runner, manifest, node_dependency_list):
 
             try:
                 for result in pool.imap_unordered(self.call_runner, args_list):
-                    if not Runner.is_ephemeral_model(result.node):
+                    is_ephemeral = Runner.is_ephemeral_model(result.node)
+                    if not is_ephemeral:
                         node_results.append(result)
 
                     node = CompileResultNode(**result.node)
                     node_id = node.unique_id
                     manifest.nodes[node_id] = node
 
                     if result.errored:
-                        for dep_node_id in self.get_dependent(linker, node_id):
-                            runner = node_runners.get(dep_node_id)
-                            if runner:
-                                runner.do_skip()
+                        dependents = self.get_dependent(linker, node_id)
+                        self._mark_dependent_errors(node_runners, dependents,
+                                                    result, is_ephemeral)
 
             except KeyboardInterrupt:
                 pool.close()
@@ -164,6 +164,18 @@ def execute_nodes(self, linker, Runner, manifest, node_dependency_list):
 
         return node_results
 
+    @staticmethod
+    def _mark_dependent_errors(node_runners, dependents, result, is_ephemeral):
+        for dep_node_id in dependents:
+            runner = node_runners.get(dep_node_id)
+            if not runner:
+                continue
+            if is_ephemeral:
+                cause = result
+            else:
+                cause = None
+            runner.do_skip(cause=result)
+
     def write_results(self, execution_result):
         filepath = os.path.join(self.config.target_path, RESULT_FILE_NAME)
         write_json(filepath, execution_result.serialize())

dbt/ui/printer.py

@@ -220,8 +220,9 @@ def print_run_status_line(results):
     logger.info(stats_line.format(**stats))
 
 
-def print_run_result_error(result):
-    logger.info("")
+def print_run_result_error(result, newline=True):
+    if newline:
+        logger.info("")
 
     if result.failed:
         logger.info(yellow("Failure in {} {} ({})").format(
@@ -245,6 +246,14 @@ def print_run_result_error(result):
                 logger.info(line)
 
 
+def print_skip_caused_by_error(model, schema, relation, index, num_models,
+                               result):
+    msg = ('SKIP relation {}.{} due to ephemeral model error'
+           .format(schema, relation))
+    print_fancy_output_line(msg, red('ERROR SKIP'), index, num_models)
+    print_run_result_error(result, newline=False)
+
+
 def print_end_of_run_summary(num_errors, early_exit=False):
     if early_exit:
         message = yellow('Exited because of keyboard interrupt.')