[MacPorts] #67537: grass @8.0.1: SyntaxError: invalid syntax

[MacPorts]

#67537: grass @8.0.1: SyntaxError: invalid syntax
-------------------------+--------------------
  Reporter:  ryandesign  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:              |   Keywords:
      Port:  grass       |
-------------------------+--------------------

Comment (by ryandesign):

 We typically don't do these kinds of complex replacements with `reinplace`
 because something as simple as a version update can cause them to no
 longer work due to minor changes in upstream code, and because
 [ticket:60844 MacPorts only warns and does not error] when this happens.
 MacPorts developers often ignore these warnings (or perhaps do not see
 them because they are buried in a flood other output in debug or verbose
 modes) with the consequence that changes that a Portfile was intending to
 make are no longer being made. This might lead to wrong behavior of the
 port, which users would then discover and hopefully report, but probably
 not before being annoyed that they had to take time out of their day to do
 that.

 Instead, for anything more complex than replacing one value with another,
 we write a patchfile. The patchfile contains a placeholder, such as
 `@PYBIN@` in this case. The Portfile applies the patch and then afterward
 uses `reinplace` to replace the `@PYBIN@` placeholder with the correct
 Portfile variable. If the patchfile ever fails to apply in some future
 version of the software, MacPorts will error, forcing the MacPorts
 developer to analyze why and either update the patchfile or remove it and
 the `reinplace`. The context provided by the patchfile can assist the
 developer in determining what the code looked like before and figuring out
 whether similar code that still needs patching exists in the file now.

-- 
Ticket URL: <https://trac.macports.org/ticket/67537#comment:4>
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