Fix packaging script - Memory error in md5 calculations

During package preparation whole file is read and stashed in to RAM. when the file is large, like ONAP package it will result in an error

Signed-off-by: Mateusz Pilat <m.pilat@partner.samsung.com>
Issue-ID: OOM-2308
Change-Id: Ic2dbea4018162bd4cfb380f6fb34078062c38a09

diff --git a/build/package.py b/build/package.py
index 82fbba3..9e37d4b 100755 (executable)
--- a/build/package.py
+++ b/build/package.py
@@ -107,11 +107,13 @@ def add_checksum_info(output_dir):
     tar_files = ['resources_package.tar', 'aux_package.tar', 'sw_package.tar']
     for tar_file in tar_files:
         try:
-            data = os.path.join(output_dir, tar_file)
-            cksum = hashlib.md5(open(data, 'rb').read()).hexdigest()
+            checksum = hashlib.md5()
+            with open(os.path.join(output_dir, tar_file), 'rb') as f:
+                for chunk in iter(lambda: f.read(4096), b""):
+                    checksum.update(chunk)
             with open(os.path.join(output_dir, 'package.info'), 'r') as f:
                 json_data = json.load(f)
-                json_data['Build_info']['Packages'].update({tar_file: cksum})
+                json_data['Build_info']['Packages'].update({tar_file: checksum.hexdigest()})
             with open(os.path.join(output_dir, 'package.info'), 'w') as f:
                 json.dump(json_data, f, indent=4)
         except FileNotFoundError: