[MacPorts] #55939: reclaim does not support distfile tags

[MacPorts]

#55939: reclaim does not support distfile tags
------------------------+--------------------
 Reporter:  ryandesign  |      Owner:
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  base        |    Version:  2.4.99
 Keywords:              |       Port:
------------------------+--------------------
 `port reclaim` does not support tags -- the labels that can be added after
 a colon to `distfiles` and `master_sites` values to group them.

 A port might specify its distfiles as:

 {{{
 distfiles           foo.tar.gz:foosite \
                     bar.tar.gz:barsite
 }}}

 This means "download the file 'foo.tar.gz' from the site with the tag
 'foosite' and the file 'bar.tar.gz' from the site with the tag 'barsite'".
 Such a port would then specify its `master_sites` as:

 {{{
 master_sites        https://foo.example.com/fooproject/:foosite \
                     https://bar.example.com/barproject/:barsite
 }}}

 This would cause MacPorts to download the files
 !https://foo.example.com/fooproject/foo.tar.gz and
 !https://bar.example.com/barproject/bar.tar.gz.

 `port reclaim` is not aware of this feature; it just uses each element of
 `distfiles` literally. So it checks the disk for the files
 "foo.tar.gz:foosite" and "bar.tar.gz:barsite", which of course don't
 exist.

 Implementing support for tags requires using the procedures `getdistsite`
 and `getdisttag` from [browser:macports-base/src/port1.0/portutil.tcl
 portutil.tcl]. Take a look at the other places in base that use these
 procedures.

--
Ticket URL: <https://trac.macports.org/ticket/55939>
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