[Trac #935] sugar-jhbuild checkout by date (-D)

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#935: sugar-jhbuild checkout by date (-D)
----------------------------+-----------------------------------------------
 Reporter:  ianb            |       Owner:  krstic   
     Type:  enhancement     |      Status:  new      
 Priority:  normal          |   Milestone:  Untriaged
Component:  infrastructure  |    Keywords:           
----------------------------+-----------------------------------------------
 Right now you can pass {{{-D YYYY-MM-DD HH:MM}}} to {{{sugar-jhbuild}}} to
 have it check out all the packages pegged to that date, but it doesn't
 work for git repositories (fails with an error).  There's not an obvious
 way to do this in git, but after some discussion this seems like it could
 work:

 {{{
 commit="`git-log --until="$date" --max-count=1 | awk '/^commit/ {print
 $2}'`"
 git-checkout -b "tag-$date" $commit
 }}}

 This logic would be added to {{{sugar-jhbuild}}} somewhere.

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Ticket URL: <http://dev.laptop.org/ticket/935>
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