Commit Graph

4 Commits

Author SHA1 Message Date
Edward Thomson
f0f2ff9cac test failure when renames produce similar similarities 2013-06-18 09:39:10 -07:00
Edward Thomson
bda3fbb1ac failing unit test for similar renames 2013-06-10 15:16:58 -05:00
Russell Belfer
d4b747c1cb Add diff rename tests with partial similarity
This adds some new tests that actually exercise the similarity
metric between files to detect renames, copies, and split modified
files that are too heavily modified.

There is still more testing to do - these tests are just partially
covering the cases.

There is also one bug fix in this where a change set with only
MODIFY being broken into ADD/DELETE (due to low self-similarity)
without any additional RENAMED entries would end up not processing
the split requests (because the num_rewrites counter got reset).
2013-02-21 16:44:44 -08:00
Russell Belfer
b4f5bb0747 Initial implementation of diff rename detection
This implements the basis for diff rename and copy detection,
although it is based on simple SHA comparison right now instead
of using a matching algortihm.  Just as `git_diff_merge` can be
used as a post-pass on diffs to emulate certain command line
behaviors, there is a new API `git_diff_detect` which will
update a diff list in-place, adjusting some deltas to RENAMED
or COPIED state (and also, eventually, splitting MODIFIED deltas
where the change is too large into DELETED/ADDED pairs).

This also adds a new test repo that will hold rename/copy/split
scenarios.  Right now, it just has exact-match rename and copy,
but the tests are written to use tree diffs, so we should be able
to add new test scenarios easily without breaking tests.
2012-10-23 16:40:51 -07:00