Include file_dependencies as variable for Copy Commands. (#17)

Author: jieyinybl

data_integration/commands/sql.py

@@ -140,14 +140,16 @@ class Copy(_SQLCommand):
 
     def __init__(self, source_db_alias: str, target_table: str, target_db_alias: str = None,
                  sql_statement: str = None, sql_file_name: Union[Callable, str] = None, replace: {str: str} = None,
-                 timezone: str = None, csv_format: bool = None, delimiter_char: str = None) -> None:
+                 timezone: str = None, csv_format: bool = None, delimiter_char: str = None,
+                 file_dependencies = None) -> None:
         _SQLCommand.__init__(self, sql_statement, sql_file_name, replace)
         self.source_db_alias = source_db_alias
         self.target_table = target_table
         self._target_db_alias = target_db_alias
         self.timezone = timezone
         self.csv_format = csv_format
         self.delimiter_char = delimiter_char
+        self.file_dependencies = file_dependencies or []
 
     @property
     def target_db_alias(self):
@@ -156,6 +158,28 @@ def target_db_alias(self):
     def file_path(self) -> pathlib.Path:
         return self.parent.parent.base_path() / self.file_name
 
+    def run(self) -> bool:
+        if self.sql_file_name:
+            logger.log(self.sql_file_name, logger.Format.ITALICS)
+
+        dependency_type = 'Copy ' + (self.sql_file_name or self.sql_statement)
+
+        if self.file_dependencies:
+            assert (self.parent)
+            pipeline_base_path = self.parent.parent.base_path()
+            if not file_dependencies.is_modified(self.node_path(), dependency_type,
+                                                 pipeline_base_path,
+                                                 self.file_dependencies):
+                logger.log('no changes')
+                return True
+
+        if not super().run():
+            return False
+
+        if self.file_dependencies:
+            file_dependencies.update(self.node_path(), dependency_type, pipeline_base_path, self.file_dependencies)
+        return True
+
     def shell_command(self):
         return _SQLCommand.shell_command(self) \
                + '  | ' + mara_db.shell.copy_command(self.source_db_alias, self.target_db_alias, self.target_table,