[MacPorts] #27299: defect: reinplace dequotes backslashes incompatibly with sed -E

[MacPorts]

#27299: defect: reinplace dequotes backslashes incompatibly with sed -E
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  Reporter:  james.from.wellington@…          |       Owner:  macports-tickets@…                   
      Type:  defect                           |      Status:  closed                               
  Priority:  Normal                           |   Milestone:                                       
 Component:  base                             |     Version:  1.9.2                                
Resolution:  invalid                          |    Keywords:                                       
      Port:                                   |  
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Comment(by james.from.wellington@…):

 Inserting an explanation for the next confused person.

 It's at least partly a feature.  As JRM says, the portfile is parsed with
 the ordinary tcl parser, and happens before anything we can see in the
 callstack.

 Tcl recognises two kinds of strings.

 "This kind" does both dollar ($) and backslash (\) substitution before
 anything I can see gets the data.

 {This kind} does neither.

 I want dollar substitutions, but not backslash substitutions.

 I intend to implement a new option in reinplace, to undo the backslash
 substitutions.  When it's working for me I will open a new ticket as an
 enhancement.

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Ticket URL: <https://trac.macports.org/ticket/27299#comment:2>
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