reproducible_zip 0.2.0

Reproducible ZipFile (supports shutil.archive)

Reproducible / Deterministic ZipFiles

A tool to generate consistent zip files.

Installation

pip install reproducible_zip

Usage

The module uses the same interface as the python builtin zipfile module:

python -m reproducible_zip

How does it work?

There are four tricks to building a deterministic zip:

1. Files must be added to the zip in the same order. rzip sorts all directories and files (with directories first) before adding them to the zip archive.

2. Files in the zip must have consistent timestamps. The timestamp of files and directories is set to the minimum timestamp for zipfiles: 1980-01-01 00:00:00.

3. Files in the zip must have consistent permissions. All permission bits are set -rwxrwxrwx for files and drwxrwxrwx for directories.

4. The "create system" for all files is set to "unix-like" (3) to ensure the correct intrepretation of the external_attrs/permissons.