add update script

.gitignore

@@ -0,0 +1 @@
+*.deb

update-vscode-flatpak.py

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+#!/usr/bin/env python3
+
+import os
+import sys
+import subprocess
+from datetime import datetime
+from lxml import etree
+from ruamel.yaml import YAML
+
+MANIFEST = 'com.visualstudio.code.yaml'
+APPDATA = 'com.visualstudio.code.appdata.xml'
+
+GIT = ['git', 'ls-remote', '--tags', '--sort=-v:refname', 'https://github.com/Microsoft/vscode', '?.??.?']
+VERSION = subprocess.check_output(GIT).decode("utf-8").splitlines()[0].split('/')[2]
+
+yaml = YAML()
+yaml.indent(mapping=2, sequence=4, offset=2)
+yaml.width = 200
+
+with open(MANIFEST, 'r') as f:
+    data = yaml.load(f)
+
+if VERSION in data['modules'][-1]['sources'][-1]['url']:
+    print('No update needed. Current version: ' + VERSION)
+    sys.exit()
+
+ARCHES = {'x64': -2, 'ia32': -1}
+
+for arch, pos in ARCHES.items():
+    source_entry = data['modules'][-1]['sources'][pos]
+    source_entry['url'] = 'https://vscode-update.azurewebsites.net/' + VERSION + '/linux-deb-' + arch + '/stable'
+    FILENAME = 'code_' + VERSION + '_' + arch + '.deb'
+    subprocess.call(['curl', '-R', '-L', '-o', FILENAME, '-C', '-', source_entry['url']])
+    source_entry['sha256'] = subprocess.check_output(['sha256sum', FILENAME]).decode("utf-8").split(None, 1)[0]
+    source_entry['size'] = os.path.getsize(FILENAME)
+
+with open(MANIFEST, 'w') as f:
+    yaml.dump(data, f)
+
+release = etree.Element('release', {
+    'version': VERSION,
+    'date': datetime.utcfromtimestamp(os.path.getmtime(FILENAME)).strftime('%Y-%m-%d')
+})
+parser = etree.XMLParser(remove_comments=False)
+tree = etree.parse(APPDATA, parser=parser)
+releases = tree.find('releases')
+for child in list(releases):
+    releases.remove(child)
+release.tail = '\n  '
+releases.append(release)
+tree.write(APPDATA, encoding="utf-8", xml_declaration=True)
+
+print("Update done. New version: " + VERSION)