[MacPorts] #14141: Guide should say what characters are valid in variant names

[MacPorts]

#14141: Guide should say what characters are valid in variant names
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  Reporter:  ryandesign at macports.org  |       Owner:  markd at macports.org     
      Type:  defect                   |      Status:  reopened               
  Priority:  Normal                   |   Milestone:  Website & Documentation
 Component:  guide                    |     Version:  1.6.0                  
Resolution:                           |    Keywords:                         
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Changes (by ryandesign at macports.org):

  * status:  closed => reopened
  * resolution:  fixed =>
  * summary:  Variant names cannot contain hyphens; guide should mention
              this => Guide should say what characters are
              valid in variant names

Comment:

 Thanks for your quick response!

 But actually, rather than just mention that the hyphen is invalid, let's
 mention what is valid. All our ports' variant names right now use just the
 letters A-Z and a-z, numbers 0-9 and the underscore, so I think that's the
 list of valid characters we should publish in the guide. It's still worth
 mentioning specifically that the hyphen is invalid, since people seem to
 want to use that, and a handful of ports' variant names still use the
 hyphen; I'll work with those port maintainers to remove those.

 Related: `port lint` should warn on illegal variant names; see #14147.

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Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/14141#comment:2>
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