[GHC] #8251: Validate submodule references during pre-receive hook

[GHC]

#8251: Validate submodule references during pre-receive hook
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              Reporter:  hvr         |            Owner:  hvr
                  Type:  task        |           Status:  closed
              Priority:  normal      |        Milestone:
             Component:  Trac & Git  |          Version:  7.6.3
            Resolution:  fixed       |         Keywords:  admin git
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:  #8545 #8544
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by thomie):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 Please reopen if needed:
 > Moreover, when adding a new submodule ref to a repository hosted at
 `git.haskell.org` another hook script could add a hidden ref or a
 [https://www.kernel.org/pub/software/scm/git/docs/git-notes.html Git note]
 to the referenced commit, effectively providing a back-ref, and ensuring
 the commit doesn't become dangling and subsequently garbage collected.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8251#comment:7>
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