[ET Trac] [Einstein Toolkit] #202: Add support for tags in git/darcs

[Einstein Toolkit]

#202: Add support for tags in git/darcs
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 Reporter:  eric9          |       Owner:  eric9
     Type:  enhancement    |      Status:  new  
 Priority:  major          |   Milestone:       
Component:  GetComponents  |     Version:       
 Keywords:                 |  
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 Currently the !REPO_BRANCH directive can only be used to specify a branch
 to checkout in a git or hg repository. Tags can already be checked out in
 hg since the command is the same as for checking out branches. In git
 however, the 'git checkout --track -b branch' command will fail if the
 specified branch is actually a tag. GetComponents should compare the
 branch name with the output of `git tag -l`, and if a match is found it
 should checkout the tag. Darcs currently does not support !REPO_BRANCH at
 all; this should be implemented.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/202>
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