Compress nodes and edges by default

src/kg_bioportal/cli.py

@@ -172,7 +172,14 @@ def download(
 @main.command()
 @click.option("--input_dir", "-i", default="data/raw", type=click.Path(exists=True))
 @click.option("--output_dir", "-o", default="data/transformed")
-def transform(input_dir, output_dir) -> None:
+@click.option(
+    "--compress",
+    "-c",
+    is_flag=True,
+    default=True,
+    help="If true, compresses the output nodes and edges to tar.gz. Defaults to True.", 
+)
+def transform(input_dir, output_dir, compress) -> None:
     """Transforms all ontologies in the input directory to KGX nodes and edges.
 
     Yields two log files: total_stats.yaml and onto_stats.yaml.
@@ -190,7 +197,7 @@ def transform(input_dir, output_dir) -> None:
 
     tx = Transformer(input_dir=input_dir, output_dir=output_dir)
 
-    tx.transform_all()
+    tx.transform_all(compress=compress)
 
     return None
 

src/kg_bioportal/transformer.py

@@ -3,13 +3,15 @@
 import logging
 import os
 import sys
+import tarfile
 from typing import Tuple
 
 import yaml
 from kgx.transformer import Transformer as KGXTransformer
 
 from kg_bioportal.downloader import ONTOLOGY_LIST_NAME
-from kg_bioportal.robot_utils import initialize_robot, robot_convert, robot_relax
+from kg_bioportal.robot_utils import (initialize_robot, robot_convert,
+                                      robot_relax)
 
 # TODO: Don't repeat steps if the products already exist
 # TODO: Fix KGX hijacking logging
@@ -55,15 +57,15 @@ def __init__(
 
         return None
 
-    def transform_all(self) -> None:
+    def transform_all(self, compress: bool) -> None:
         """Transforms all ontologies in the input directory to KGX nodes and edges.
 
         Yields two log files: total_stats.yaml and onto_stats.yaml.
         The first contains the total counts of Bioportal ontologies and transforms.
         The second contains the counts of nodes and edges for each ontology.
 
         Args:
-            None.
+            compress: If True, compresses the output nodes and edges to tar.gz.
 
         Returns:
             None.
@@ -95,7 +97,7 @@ def transform_all(self) -> None:
 
         for filepath in filepaths:
             ontology_name = (os.path.relpath(filepath, self.input_dir)).split(os.sep)[0]
-            success, nodecount, edgecount = self.transform(filepath)
+            success, nodecount, edgecount = self.transform(filepath, compress)
             if not success:
                 logging.error(f"Error transforming {filepath}.")
                 status = False
@@ -142,11 +144,12 @@ def transform_all(self) -> None:
 
         return None
 
-    def transform(self, ontology_path: str) -> Tuple[bool, int, int]:
+    def transform(self, ontology_path: str, compress: bool) -> Tuple[bool, int, int]:
         """Transforms a single ontology to KGX nodes and edges.
 
         Args:
-            ontology: A string of the path to the ontology file to transform.
+            ontology_path: A string of the path to the ontology file to transform.
+            compress: If True, compresses the output nodes and edges to tar.gz.
 
         Returns:
             Tuple of:
@@ -239,6 +242,16 @@ def transform(self, ontology_path: str) -> Tuple[bool, int, int]:
             with open(edgefilename, "r") as f:
                 edgecount = len(f.readlines()) - 1
 
+            # Compress if requested
+            if compress:
+                logging.info("Compressing nodes and edges.")
+                with tarfile.open(f"{outfilename}.tar.gz", "w:gz") as tar:
+                    tar.add(nodefilename, arcname=f"{ontology_name}_nodes.tsv")
+                    tar.add(edgefilename, arcname=f"{ontology_name}_edges.tsv")
+
+                os.remove(nodefilename)
+                os.remove(edgefilename)
+
         except Exception as e:
             logging.error(
                 f"Error transforming {ontology_name} to KGX nodes and edges: {e}"