[GitHub] [beam] tvalentyn commented on a change in pull request #11067: [BEAM-9136]Add licenses for dependencies for Python

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tvalentyn commented on a change in pull request #11067: [BEAM-9136]Add licenses for dependencies for Python
URL: https://github.com/apache/beam/pull/11067#discussion_r401988525
 
 

 ##########
 File path: sdks/python/container/license_scripts/pull_licenses_py.py
 ##########
 @@ -0,0 +1,143 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+A script to pull licenses for Python.
+The script is executed within Docker.
+"""
+import json
+import os
+import shutil
+import subprocess
+import sys
+import tempfile
+import traceback
+import yaml
+
+from future.moves.urllib.request import urlopen
+from tenacity import retry
+from tenacity import stop_after_attempt
+from tenacity import wait_exponential
+
+LICENSE_DIR = '/opt/apache/beam/third_party_licenses'
+
+
+def run_bash_command(command):
+  return subprocess.check_output(command.split()).decode('utf-8')
+
+
+def run_pip_licenses():
+  command = 'pip-licenses --with-license-file --format=json'
+  dependencies = run_bash_command(command)
+  return json.loads(dependencies)
+
+
+@retry(stop=stop_after_attempt(3))
+def copy_license_files(dep):
+  source_license_file = dep['LicenseFile']
+  if source_license_file.lower() == 'unknown':
+    return False
+  name = dep['Name'].lower()
+  dest_dir = '/'.join([LICENSE_DIR, name])
+  try:
+    os.mkdir(dest_dir)
+    shutil.copy(source_license_file, dest_dir + '/LICENSE')
+    print(
+        'Successfully pulled license for {dep} with pip-licenses.'.format(
+            dep=name))
+    return True
+  except Exception as e:
+    print(
+        'Failed to copy from {source} to {dest}'.format(
+            source=source_license_file, dest=dest_dir + '/LICENSE'))
+    traceback.print_exc()
+
+
+@retry(wait=wait_exponential(multiplier=1, min=30, max=180))
+def pull_from_url(dep, configs):
+  '''
+  :param dep: name of a dependency
+  :param configs: a dict from dep_urls_py.yaml
+  :return: boolean
+
+  It downloads files form urls to a temp directory first in order to avoid
+  to deal with any temp files. It helps keep clean final directory.
+  '''
+  if dep in configs:
+    config = configs[dep]
+    dest_dir = '/'.join([LICENSE_DIR, dep])
+    cur_temp_dir = tempfile.mkdtemp()
+
+    try:
+      if config['license'] == 'skip':
+        print('Skip pulling license for ', dep)
+      else:
+        url_read = urlopen(config['license'])
+        with open(cur_temp_dir + '/LICENSE', 'wb') as temp_write:
+          shutil.copyfileobj(url_read, temp_write, length=1 << 20)
+        print(
+            'Successfully pulled license for {dep} from {url}.'.format(
+                dep=dep, url=config['license']))
+
+      # notice is optional.
+      if 'notice' in config:
+        url_read = urlopen(config['notice'])
+        with open(cur_temp_dir + '/NOTICE', 'wb') as temp_write:
+          shutil.copyfileobj(url_read, temp_write, length=1 << 20)
+
+      shutil.copytree(cur_temp_dir, dest_dir)
+      shutil.rmtree(cur_temp_dir)
+      return True
+    except Exception as e:
+      shutil.rmtree(cur_temp_dir)
 
 Review comment:
   followed up offline - you don't need to move `return` statement into `finally` block.

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