Refactor npm packages download

Series of commits to improve python download
scripts.

Issue-ID: OOM-1803

Change-Id: I199660ab121038780c34065f78538bb4e7b07eb5
Signed-off-by: Milan Verespej <m.verespej@partner.samsung.com>

2 files changed, 136 insertions, 2 deletions

diff --git a/build/download/http_downloader.py b/build/download/http_downloader.py
index 69adc4dd..ba2c0f7e 100644
--- a/build/download/http_downloader.py
+++ b/build/download/http_downloader.py
@@ -36,8 +36,8 @@ log = logging.getLogger(__name__)
 
 
 class HttpDownloader(ConcurrentDownloader):
-    def __init__(self, *list_args, workers=None):
-        super().__init__('http files', *list_args, workers=workers)
+    def __init__(self, *list_args, list_type='http_files', workers=None):
+        super().__init__(list_type, *list_args, workers=workers)
 
     @property
     def check_table(self):
diff --git a/build/download/npm_downloader.py b/build/download/npm_downloader.py
new file mode 100755
index 00000000..369af72a
--- /dev/null
+++ b/build/download/npm_downloader.py
@@ -0,0 +1,134 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+#   COPYRIGHT NOTICE STARTS HERE
+
+#   Copyright 2019 © Samsung Electronics Co., Ltd.
+#
+#   Licensed 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.
+
+#   COPYRIGHT NOTICE ENDS HERE
+
+import argparse
+import datetime
+import hashlib
+import logging
+import os
+import sys
+import timeit
+
+from retrying import retry
+
+import http_downloader
+import http_file
+
+log = logging.getLogger(__name__)
+
+
+class NpmDownloader(http_downloader.HttpDownloader):
+    def __init__(self, npm_registry, *list_args, workers=None):
+        super().__init__(*list_args, list_type='npm packages', workers=workers)
+        self._registry = npm_registry
+
+    def _download_item(self, item):
+        """
+        Download npm package
+        :param item: http file to be downloaded (tuple: (npm_name@version, dst_dir))
+        """
+        log.info('Downloading: {}'.format(item[0]))
+        npm_name, npm_version = item[0].split('@')
+        dst_path = '{}/{}-{}.tgz'.format(item[1], npm_name, npm_version)
+        try:
+            tarball = http_file.HttpFile(item[0], self._get_npm(*item[0].split('@')), dst_path)
+            tarball.save_to_file()
+        except Exception as err:
+            log.exception('Failed: {}'.format(item[0]))
+            if os.path.isfile(dst_path):
+                os.remove(dst_path)
+            raise err
+        log.info('Downloaded: {}'.format(item[0]))
+
+    @retry(stop_max_attempt_number=5, wait_fixed=5000)
+    def _get_npm(self, npm_name, npm_version):
+        """
+        Download and save npm tarball to disk
+        :param npm_name: name of npm package
+        :param npm_version: version of npm package
+        """
+        npm_url = '{}/{}/{}'.format(self._registry, npm_name, npm_version)
+        npm_req = self._make_get_request(npm_url)
+        npm_json = npm_req.json()
+        tarball_url = npm_json['dist']['tarball']
+        shasum = npm_json['dist']['shasum']
+        tarball_req = self._make_get_request(tarball_url)
+        tarball = tarball_req.content
+        if hashlib.sha1(tarball).hexdigest() == shasum:
+            return tarball
+        else:
+            raise Exception(
+                '{}@{}: Wrong checksum. Retrying...'.format(npm_name, npm_version))
+
+    def _is_missing(self, item):
+        """
+        Check if item is missing (not downloaded)
+        :param item: item to check
+        :return: boolean
+        """
+        return not os.path.isfile('{}/{}-{}.tgz'.format(self._data_list[item], *item.split('@')))
+
+
+def run_cli():
+    """
+    Run as cli tool
+    """
+    parser = argparse.ArgumentParser(description='Download npm packages from list')
+    parser.add_argument('npm_list', metavar='npm-list',
+                        help='File with list of npm packages to download.')
+    parser.add_argument('--registry', '-r', default='https://registry.npmjs.org',
+                        help='Download destination')
+    parser.add_argument('--output-dir', '-o', default=os.getcwd(),
+                        help='Download destination')
+    parser.add_argument('--check', '-c', action='store_true', default=False,
+                        help='Check what is missing. No download.')
+    parser.add_argument('--debug', action='store_true', default=False,
+                        help='Turn on debug output')
+    parser.add_argument('--workers', type=int, default=None,
+                        help='Set maximum workers for parallel download (default: cores * 5)')
+
+    args = parser.parse_args()
+
+    if args.debug:
+        logging.basicConfig(stream=sys.stdout, level=logging.DEBUG)
+    else:
+        logging.basicConfig(stream=sys.stdout, level=logging.INFO, format='%(message)s')
+
+    downloader = NpmDownloader(args.registry, [args.npm_list, args.output_dir], workers=args.workers)
+
+    if args.check:
+        log.info('Check mode. No download will be executed.')
+        log.info(downloader.check_table)
+        sys.exit(0)
+
+    timer_start = timeit.default_timer()
+    try:
+        downloader.download()
+    except RuntimeError:
+        log.error('Error occurred.')
+        sys.exit(1)
+    finally:
+        log.info('Downloading finished in {}'.format(
+            datetime.timedelta(seconds=timeit.default_timer() - timer_start)))
+
+
+if __name__ == '__main__':
+    run_cli()