implement automatic updater

updater/main.py

@@ -0,0 +1,48 @@
+import urllib.request
+from os import path
+
+import certificates
+import git
+from sources import ApkRelease, fdroid_recommended_release
+
+
+def update_if_needed(module: str, release: ApkRelease):
+    module_dir = path.abspath(path.join(path.dirname(__file__), '..', module))
+    with open(path.join(module_dir, '.version_code'), 'r+') as version_code_file:
+        version_code = int(version_code_file.read())
+        if version_code < release.version_code:
+            print('updating {} to {}'.format(module, release.version_name))
+            apk_filename = path.join(module_dir, '{}.apk'.format(module))
+
+            old_sig = certificates.get_apk_certificate(apk_filename)
+
+            print('downloading {} ...'.format(release.download_url))
+            urllib.request.urlretrieve(release.download_url, apk_filename)
+
+            new_sig = certificates.get_apk_certificate(apk_filename)
+            if old_sig != new_sig:
+                raise Exception('Signature mismatch for {} old sig: {} new sig: {}'.format(module, old_sig, new_sig))
+
+            version_code_file.seek(0)
+            version_code_file.write(str(release.version_code))
+            version_code_file.truncate()
+            version_code_file.close()
+
+            print('commit and push...')
+            git.add_commit_push(module_dir, 'Update {} to {}'.format(module, release.version_name))
+
+        elif version_code > release.version_code:
+            print('{} ahead of suggested version ({} > {})'.format(module, version_code, release.version_code))
+        elif version_code == release.version_code:
+            print('{} up to date.'.format(module))
+
+fdroid_main_repo = 'https://www.f-droid.org/repo'
+fdroid_microg_repo = 'https://microg.org/fdroid/repo'
+
+update_if_needed('FakeStore', fdroid_recommended_release(fdroid_microg_repo, 'com.android.vending'))
+update_if_needed('FDroid', fdroid_recommended_release(fdroid_main_repo, 'org.fdroid.fdroid'))
+update_if_needed('FDroidPrivilegedExtension', fdroid_recommended_release(fdroid_main_repo, 'org.fdroid.fdroid.privileged'))
+update_if_needed('GmsCore', fdroid_recommended_release(fdroid_microg_repo, 'com.google.android.gms'))
+update_if_needed('GsfProxy', fdroid_recommended_release(fdroid_microg_repo, 'com.google.android.gsf'))
+update_if_needed('IchnaeaNlpBackend', fdroid_recommended_release(fdroid_main_repo, 'org.microg.nlp.backend.ichnaea'))
+update_if_needed('NominatimGeocoderBackend', fdroid_recommended_release(fdroid_main_repo, 'org.microg.nlp.backend.nominatim'))