[MacPorts] #60558: mirror_sites.tcl: trimming and updating

[MacPorts]

#60558: mirror_sites.tcl: trimming and updating
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  Reporter:  iEFdev  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  base    |    Version:  2.6.2
Resolution:          |   Keywords:
      Port:          |
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Comment (by ryandesign):

 Different servers implement different requirements for https, by virtue of
 the list of SSL/TLS protocols they support, the list of encryption
 algorithms they support, and/or whether the certificate authority through
 which their certificate is issued is recognized by the system. GitHub and
 SourceForge for example both implemented requirements a few years ago that
 surpass the abilities of /usr/bin/curl on OS X 10.8 and earlier, but not
 all servers are that restrictive, and some are more restrictive than that.

 The `distfiles_scheme` and `packages_scheme` variables aren't great,
 because they presume that the decision about whether to use http or https
 is always the same on an OS version. It is not; it varies by server. So
 there should really be separate variables for each server, for those that
 offer http and https, if that https is not compatible with all systems.

 We use these variables only for official MacPorts mirrors. For other
 servers, if they offer https, we have been switching unconditionally to
 https in the interest of privacy, even if that https does not support all
 OS versions. In that case older OS versions may try to connect to those
 servers, fail, and then download successfully from another server, such as
 our mirrors; that's fine. Figuring out which OS versions support https on
 each of hundreds of other servers would be too tedious.

 As for the other issues, thanks for pointing them out. I wasn't aware of
 them. You're correct for example that [https://derickrethans.nl/php-
 mirrors.html the php mirrors are gone] and we need to adapt MacPorts
 accordingly. Regarding the dead link, it's inevitable that servers will go
 way or that they will stop hosting some content. There is no automated
 process in place to keep mirror_sites.tcl up to date; it requires someone
 like you to notice a problem and for it to be fixed manually. If you'd
 like to submit a PR to fix any or all of this that would be great,
 otherwise I'm sure someone will get to it eventually.

-- 
Ticket URL: <https://trac.macports.org/ticket/60558#comment:2>
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