[MacPorts] #33573: Check "svn info" exit status instead of existence of ".svn" directory

[MacPorts]

#33573: Check "svn info" exit status instead of existence of ".svn" directory
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 Reporter:  ryandesign@…             |       Owner:  macports-tickets@…                   
     Type:  enhancement              |      Status:  new                                  
 Priority:  Normal                   |   Milestone:                                       
Component:  base                     |     Version:  2.0.4                                
 Keywords:                           |        Port:                                       
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 When MacPorts is deciding whether a sync directory is a valid Subversion
 working copy, it should use the "`$svn_cmd info`" command, throw away the
 stdout and stderr, and check the exit code: if it's 0, it's a working copy
 and we can continue with sync; if it's not 0, it's not a working copy and
 we should abort.

 [browser:trunk/base/src/macports1.0/macports.tcl?rev=90368#L2190
 Currently] MacPorts decides whether a directory is a valid working copy
 based on whether it contains an ".svn" directory. As of Subversion 1.7,
 this is no longer the case except for the root directory of a working
 copy, so [http://lists.macosforge.org/pipermail/macports-
 dev/2012-March/018132.html some setups fail].

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Ticket URL: <https://trac.macports.org/ticket/33573>
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