In Transfer class, unbundle 'intact' with the monotonicity of the input
ranges. Negate the logic of 'intact', and thus rename it to 'trimmed'.
Move this property from an attribute of Transfer class as the one in
RangeSet.extra. 'trimmed' indicates whether the source / target ranges
have been modified after creating the Transfer() instance.
The logic that determines whether we can apply imgdiff has been
refactored and consolidated into BlockImageDiff.CanUseImgdiff(). Now
both of the two paths call this single copy, i.e. the one that detects
large APKs (before creating Transfer()'s), and the other that's about to
generate the patch for a given Transfer instance.
Bug: 68016761
Test: python -m unittest test_blockimgdiff
Test: Generate an incremental BBOTA package.
Change-Id: Id07195f63f1fa6c3af6e9091940d251cf09fa104
HeapItem defines __bool__(), which contains a logical error that should
return the opposite value.
Note that the bug only manifests while using Python 3, which calls
__bool__(). With Python 2, `if x:` or bool(x) actually calls
x.__nonzero__() or x.__len__(). If a class defines neither __len__() nor
__nonzero__(), as the case in HeapItem, it always returns True.
Test: python -m unittest test_blockimgdiff
Test: python3 -m unittest test_blockimgdiff
Test: Generate an incremental non-A/B OTA package successfully.
Change-Id: Ibe8430e0b495a7d2f430cfffb716d2536ffb53d2
The test broke due to api change in constructor of Transfer.
Bug: 36456381
Test: blockimgdiff test passes
Change-Id: Ic73b66f8fb6141ff6f50c113b0d8cc55d34e0b5d
set() doesn't keep elements according to the order of insertion. So
Transfers managed with set() in intermediate steps may not appear in the
same order across runs. This leads to slightly different output packages
when generating the same incremental OTA.
This CL fixes the issue by replacing set() with OrderedDict() in
blockimgdiff.GenerateDigraph() and blockimgdiff.FindVertexSequence().
It also adds a testcase that ensures blockimgdiff.GenerateDigraph()
preserves the insertion order for Transfer.goes_after set.
Bug: 32220816
Test: ota_from_target_files.py gives identical package when running
multiple times.
Change-Id: I56d551e5ca926993ab46896e33c80e0ce42e506a
