phabricator: verify local tags before trusting them...
phabricator: verify local tags before trusting them
Previously we trust local tags blindly and that could cause wrong
Differential Revision to be updated, when people switch between Phabricator
instances.
This patch adds verification logic to detect such issue and remove
problematic tags. For example, a tag "D19" was on node "X", the code will
fetch all diffs attached to D19, and check if nodes server-side overlaps
with nodes in precursors. If they do not overlap, create a new Differential
Revision.
Test Plan:
Use a test Phabricator instance, send patches using `hg phabsend`, then
change the local tag manually to a wrong Differential Revision number.
Amend the patch and send again. Make sure the tag gets ignored and deleted.
Differential Revision:
https://phab.mercurial-scm.org/D36
