[MacPorts] #60614: Travis: Create hosts file to work around DNS resolution failures

[MacPorts]

#60614: Travis: Create hosts file to work around DNS resolution failures
----------------------------+---------------------
 Reporter:  ryandesign      |      Owner:  admin@…
     Type:  defect          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  server/hosting  |    Version:
 Keywords:                  |       Port:
----------------------------+---------------------
 [https://paste.macports.org/77731bf16fce Travis builds fail] all the time
 with errors like this:

 {{{
 --->  Attempting to fetch ossp-
 uuid-1.6.2_11+perl5_28.darwin_17.x86_64.tbz2 from https://packages-
 private.macports.org/ossp-uuid
   % Total    % Received % Xferd  Average Speed   Time    Time     Time
 Current
                                  Dload  Upload   Total   Spent    Left
 Speed

   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--
 0DEBUG: Fetching archive failed: Could not resolve host: packages-
 private.macports.org
 --->  Attempting to fetch ossp-
 uuid-1.6.2_11+perl5_28.darwin_17.x86_64.tbz2 from
 https://packages.macports.org/ossp-uuid
   % Total    % Received % Xferd  Average Speed   Time    Time     Time
 Current
                                  Dload  Upload   Total   Spent    Left
 Speed

   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--
 0DEBUG: Fetching archive failed: Could not resolve host:
 packages.macports.org
 }}}
 {{{
 --->  Attempting to fetch uuid-1.6.2.tar.gz from
 ftp://ftp.ossp.org/pkg/lib/uuid/
   % Total    % Received % Xferd  Average Speed   Time    Time     Time
 Current
                                  Dload  Upload   Total   Spent    Left
 Speed

   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--
 0DEBUG: Fetching distfile failed: Could not resolve host: ftp.ossp.org
 --->  Attempting to fetch uuid-1.6.2.tar.gz from
 http://distcache.FreeBSD.org/ports-distfiles/
   % Total    % Received % Xferd  Average Speed   Time    Time     Time
 Current
                                  Dload  Upload   Total   Spent    Left
 Speed

   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--
 0DEBUG: Fetching distfile failed: Could not resolve host:
 distcache.FreeBSD.org
 --->  Attempting to fetch uuid-1.6.2.tar.gz from
 https://distfiles.macports.org/ossp-uuid
   % Total    % Received % Xferd  Average Speed   Time    Time     Time
 Current
                                  Dload  Upload   Total   Spent    Left
 Speed

   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--
 0DEBUG: Fetching distfile failed: Could not resolve host:
 distfiles.macports.org
 Error: Failed to fetch ossp-uuid: Could not resolve host:
 distfiles.macports.org
 }}}

 In other words, all DNS resolution suddenly fails so nothing can be
 downloaded.

 To test the theory that this is merely a DNS problem, do we have the
 ability to modify /etc/hosts on the Travis build machines? If so, we could
 have _ci/bootstrap.sh at least add entries for packages.macports.org,
 packages-private.macports.org and distfiles.macports.org. That might help
 some builds succeed that would otherwise have failed.

-- 
Ticket URL: <https://trac.macports.org/ticket/60614>
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