[MacPorts] #35872: git-flow: update to use github PortGroup

[MacPorts]

#35872: git-flow: update to use github PortGroup
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 Reporter:  jason-macports@…          |       Owner:  macports-tickets@…                   
     Type:  update                    |      Status:  new                                  
 Priority:  Normal                    |   Milestone:                                       
Component:  ports                     |     Version:                                       
 Keywords:  haspatch maintainer       |        Port:  git-flow                             
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Comment(by jason-macports@…):

 Regarding the git fetch, in `portfetch.tcl`, `git.*` does not have default
 argument elements, e.g. `svn.pre_args`, and it seems that
 `portfetch::gitfetch()` does not use the input `args`.   It would seem
 that it would be necessary to add at least a `default git.clone_args ""`
 and modify `portfetch::gitfetch()`'s `cmdstring` to be something like:
 `set cmdstring "${git.cmd}  clone ${git.clone_args} $options ...`.

 Since the `--recursive` option seems to be harmless if there are no
 submodules, perhaps it's easier to just `set options "-q --recursive"`?

 This has probably reached the level of a separate enhancement request,
 yes?  Shall I put it in?

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Ticket URL: <https://trac.macports.org/ticket/35872#comment:3>
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