Import GingerCal 1.0 source

tools/zipalign.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+"""Minimal zipalign: stored entries start on 4-byte boundaries. Keeps v1 (JAR) signatures valid,
+since those cover file contents, not the zip layout. usage: zipalign.py in.apk out.apk"""
+import sys
+import zipfile
+
+src, dst = sys.argv[1], sys.argv[2]
+with zipfile.ZipFile(src) as zin, open(dst, "wb") as f:
+    with zipfile.ZipFile(f, "w") as zout:
+        for info in zin.infolist():
+            data = zin.read(info.filename)
+            out = zipfile.ZipInfo(info.filename, info.date_time)
+            out.compress_type = info.compress_type
+            out.external_attr = info.external_attr
+            if info.compress_type == zipfile.ZIP_STORED:
+                header_end = f.tell() + 30 + len(info.filename.encode("utf-8"))
+                out.extra = b"\0" * ((4 - header_end % 4) % 4)
+            zout.writestr(out, data)
+with zipfile.ZipFile(dst) as z:
+    for info in z.infolist():
+        if info.compress_type == zipfile.ZIP_STORED:
+            start = info.header_offset + 30 + len(info.filename.encode("utf-8")) + len(info.extra)
+            assert start % 4 == 0, info.filename
+print("aligned", dst)