From 4a7b9526f08bfcf9bf84b68dbfb030f2227a6ce0 Mon Sep 17 00:00:00 2001
From: Boris Nagaev <bnagaev@gmail.com>
Date: Sat, 7 Jan 2017 05:19:09 +0100
Subject: [PATCH] add tools to create and update backup of packages

---
 tools/backup_from_s3.py | 74 +++++++++++++++++++++++++++++++++++++++++
 tools/update_backup.py  | 51 ++++++++++++++++++++++++++++
 2 files changed, 125 insertions(+)
 create mode 100755 tools/backup_from_s3.py
 create mode 100755 tools/update_backup.py

diff --git a/tools/backup_from_s3.py b/tools/backup_from_s3.py
new file mode 100755
index 00000000..7f514130
--- /dev/null
+++ b/tools/backup_from_s3.py
@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+
+""" Download MXE packages from https://s3.amazonaws.com/mxe-pkg/
+"""
+
+import argparse
+import hashlib
+import os
+import urllib
+try:
+    import urllib2
+except:
+    # Python 3
+    import urllib.request as urllib2
+import xml.etree.ElementTree
+
+def get_files():
+    x = xml.etree.ElementTree.fromstring(
+        urllib2.urlopen("https://s3.amazonaws.com/mxe-pkg/").read()
+    )
+    for e in x:
+        if not e.tag.endswith('Contents'):
+            continue
+        filename = None
+        md5 = None
+        for child in e.getchildren():
+            if child.tag.endswith('Key'):
+                filename = child.text
+            if child.tag.endswith('ETag'):
+                md5 = child.text.replace('"', '')
+        if '-' in md5:
+            md5 = None
+        yield {
+            'filename': filename,
+            'md5': md5,
+        }
+
+def download_files(backup_dir, files):
+    for f in files:
+        url = "https://s3.amazonaws.com/mxe-pkg/%s" % (
+            urllib.quote(f['filename'])
+        )
+        data = urllib2.urlopen(url).read()
+        if f['md5']:
+            md5 = hashlib.md5(data).hexdigest()
+            if md5 != f['md5']:
+                raise Exception("md5 mismatch for " + f['filename'])
+        sha256 = hashlib.sha256(data).hexdigest()
+        name = f['filename'] + '_' + sha256
+        full_name = os.path.join(backup_dir, name)
+        if os.path.exists(full_name):
+            print("File %s is already backuped" % name)
+            continue
+        print("Backup file %s" % name)
+        with open(full_name, 'w') as f:
+            f.write(data)
+
+def main():
+    parser = argparse.ArgumentParser(
+        description=__doc__,
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        '--backup-dir',
+        type=str,
+        help='Path to backup',
+        required=True,
+    )
+    args = parser.parse_args()
+    files = get_files()
+    download_files(args.backup_dir, files)
+
+if __name__ == '__main__':
+    main()
diff --git a/tools/update_backup.py b/tools/update_backup.py
new file mode 100755
index 00000000..00692169
--- /dev/null
+++ b/tools/update_backup.py
@@ -0,0 +1,51 @@
+#!/usr/bin/env python
+
+""" Update backup of MXE packages.
+"""
+
+import argparse
+import hashlib
+import os
+import shutil
+
+def make_checksum(filepath):
+    hasher = hashlib.sha256()
+    with open(filepath, 'rb') as f:
+        for chunk in iter(lambda: f.read(1024 ** 2), b''):
+            hasher.update(chunk)
+    return hasher.hexdigest()
+
+def update_backup(mxe_pkg_dir, backup_dir):
+    for f in os.listdir(mxe_pkg_dir):
+        sha = make_checksum(os.path.join(mxe_pkg_dir, f))
+        new_name = '%s_%s' % (f, sha)
+        if os.path.exists(os.path.join(backup_dir, new_name)):
+            print("File %s is already backuped" % new_name)
+            continue
+        shutil.copy(
+            os.path.join(mxe_pkg_dir, f),
+            os.path.join(backup_dir, new_name),
+        )
+        print("Backup file %s" % new_name)
+
+def main():
+    parser = argparse.ArgumentParser(
+        description=__doc__,
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        '--backup-dir',
+        type=str,
+        help='Path to backup',
+        required=True,
+    )
+    args = parser.parse_args()
+    mxe_tools_dir = os.path.dirname(os.path.realpath(__file__))
+    mxe_pkg_dir = os.path.join(mxe_tools_dir, '..', 'pkg')
+    update_backup(
+        mxe_pkg_dir,
+        args.backup_dir,
+    )
+
+if __name__ == '__main__':
+    main()