[MacPorts] #16373: base should maintain a persistent working copy for all supported VCS fetches

[MacPorts]

#16373: base should maintain a persistent working copy for all supported VCS
fetches
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  Reporter:  ryandesign@…  |      Owner:  larryv@…
      Type:  enhancement   |     Status:  assigned
  Priority:  Normal        |  Milestone:  MacPorts Future
 Component:  base          |    Version:  1.7.0
Resolution:                |   Keywords:  performance fetch
      Port:                |
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Comment (by ryandesign@…):

 This assumes ${distname} is sufficiently unique, which it likely isn't.
 This particular port sets version to include the version number,
 ${git.branch} and a date, but the default for distname is
 ${name}-${version}, and it is common for projects that fetch from git to
 update their commit hash while the version and of course the name stay the
 same. The distname should probably be changed to be ${name}-${git.branch}
 for git, ${name}-${svn.revision} for subversion, etc.

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Ticket URL: <https://trac.macports.org/ticket/16373#comment:33>
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