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epriestley 02c3200867 Respond more gracefully when a git push deletes a nonexistent ref
Summary:
Fixes T5534. If you `git push origin :refs/tags/doesnotexist` (for some non-existing tag), we get a change where both the old and new refs are empty.

We incorrectly call this an "add", because the old ref is empty. Instead, call this a "delete", but skip the logic which would normally mark it dangerous.

(Possibly we should just reject these outright, but Git allows them, so stick with that for now.)

Test Plan:
Pushed nonexistent refs:

```
  $ git push origin :refs/tags/doesnotexist
  remote: warning: Allowing deletion of corrupt ref.
  To ssh://dweller@localhost/diffusion/POEMS/
   - [deleted]         doesnotexist
  $
```

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5534

Differential Revision: https://secure.phabricator.com/D9800
2014-07-10 10:17:17 -07:00
bin Add a bin/hunks script to manage migrations of hunk data 2014-06-03 18:01:23 -07:00
conf Remove @group annotations 2014-07-10 08:12:48 +10:00
externals Remove @group annotations 2014-07-10 08:12:48 +10:00
resources Add an optional preamble to Legalpad documents 2014-07-04 09:41:27 -07:00
scripts Discover workflows automatically. 2014-06-16 09:00:25 +10:00
src Respond more gracefully when a git push deletes a nonexistent ref 2014-07-10 10:17:17 -07:00
support Various minor JSHint fixes. 2014-07-01 06:00:12 +10:00
webroot Remove @group annotations 2014-07-10 08:12:48 +10:00
.arcconfig Update .arclint in Phabricator for phutil-library lint 2014-05-12 06:01:30 -07:00
.arclint Minor fixes for .arclint file 2014-07-03 11:55:43 +10:00
.editorconfig Specify config for text editors 2012-11-03 22:34:44 -07:00
.gitignore Update .gitignore. 2014-06-14 11:44:19 -07:00
LICENSE Delete license headers from files 2012-11-05 11:16:51 -08:00
NOTICE Update Phabricator NOTICE file to reflect modern legal circumstances 2014-06-25 13:42:13 -07:00
README Modernize README 2014-01-24 12:28:54 -08:00

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