| Name: Puffin deterministic deflate recompressor |
| Short Name: Puffin |
| URL: https://android.googlesource.com/platform/external/puffin |
| Version: 1.0.0 |
| Date: Tues May 10 13:55:00 2022 |
| Revision: e0820dcfebfb4df925be2e37ad8f56c00dc624f5 |
| License: Chromium OS BSD |
| License File: LICENSE |
| Security Critical: yes |
| License Android Compatible: yes |
| |
| Description: |
| Puffin is a deterministic deflate recompressor. It is mainly used for patching |
| deflate compressed images (zip, gzip, etc.) because patches created from deflate |
| files/streams are usually large (deflate has a bit-aligned format, hence, |
| changing one byte in the raw data can cause the entire deflate stream to change |
| drastically.) Specifically in chromium/src, this library is needed in order for |
| Omaha, chrome's auto-updater client, to support puffin-generated diffs created |
| by Omaha Server. |
| |
| Local Modifications: |
| - Updated OWNERS to reflect our team as the owners. |
| - Removed BUILD.gn taken from AOSP as it doesn't build in chromium. |
| - removed PRESUBMIT.cfg and PREUPLOAD.cfg |
| - Adding a DEPS file so we can pass presubmit checks. |
| - removed BSDiff as we only require the zucchini version of puffdiff/puffpatch |
| - rewrote the commandline usage for the puffin binary as we only need to support |
| and test puffdiff and puffpatch. |
| - Replaced POSIX file IO with chromium/src's base::File/base::FilePath methods |
| so it will build and run cross-platform. |
| - Removed dependence of libpuffpatch on libpuffdiff as the puffin patching |
| service we plant to implement only requires libpuffpatch. |
| - Added puffin::Status enum to help disambiguate errors from puffin::PuffPatch |
| - Added puffin::ApplyPuffPatch API which allows chromium libraries to call |
| puffin::PuffPatch without having worry about UniqueStreamPtr's and Buffer's. |
| - Added ApplyPuffPatchTest to patching_unittest to test the new method. |
| - Updated puffin/BUILD.gn to grab the new puffin_patch_test_files target under |
| components |
| - Updated puffin::ApplyPuffPatch test to use the new patch files under |
| components. |
| - Updated puffin::ApplyPuffPatch test to make sure the output files are deleted |
| so the tests will pass in back-to-back runs. |
| - Updated puffin::ApplyPuffPatch test to use base::ContentsEqual rather than |
| manually reading each file and comparing the results. |
