diffs which add empty files
Summary:
See T507 and some others. We now parse empty git diffs correctly, but the logic
to build DifferentialDiffs out of them leaves the objects with 'null' for
$changesets, when it should be array().
Further layers later throw, believing we have not loaded the changesets, when we
actually have, there just aren't any.
Test Plan: Viewed rJX05d493e17fbbb29f29e4880be6834d1d7415374e in Diffusion,
which adds an empty README file. No exception thrown.
Reviewers: jungejason, nh, tuomaspelkonen, aran
Reviewed By: nh
CC: aran, nh
Differential Revision: 1038
Summary: See T262. This creates the index on the Differential side which we need in order to execute this query efficiently on the Diffusion side.
Also renames "DiffusionGitPathIDQuery" to "DiffusionPathIDQuery", this query object has nothing to do with git.
Test Plan: Attached top-level and sub-level diffs to revisions and verified they populated the table with sensible data.
Reviewers: bmaurer, aravindn, fmoo, jungejason, nh, tuomaspelkonen, aran
CC:
Differential Revision: 931
