[tor-bugs] #24629 [Core Tor/Tor]: Activate osx builds on travis, at low priority

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#24629: Activate osx builds on travis, at low priority
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  teor
     Type:  enhancement                          |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.5.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  not-just-linux, tor-ci, teor-was-    |  Actual Points:
  assigned, 034-triage-20180328,                 |
  034-removed-20180328, 034-backport,            |
  035-removed-20180711, fast-fix                 |
Parent ID:                                       |         Points:  0.5
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by Hello71):

 Replying to [comment:19 teor]:
 > Please see my branch travis-osx-v7 on
 https://github.com/teor2345/tor.git
 >
 > I rewrote and simplified the build matrix.
 >
 > We have the following builds on all platforms (Linux, macOS) and
 compilers (gcc, clang):
 > * no Rust (with hardening, which is the default)
 > * Rust online (without hardening due to #25386/#26398)
 >
 > We have the following builds on Linux gcc:
 > * coverage
 > * no hardening
 > * distcheck
 > * disable module dirauth
 > * Rust offline (without hardening due to #25386/#26398)
 > * distcheck with Rust online (without hardening due to #25386/#26398)
 > * disable module dirauth with Rust online (without hardening due to
 #25386/#26398)
 >
 > That gives us 15 builds rather than the previous 13, so CI should
 complete in a similar time.

 overall, I like this. I'm not super convinced that we need all these
 miscellaneous builds, e.g. no hardening when we already have Rust without
 hardening, but I guess they could help diagnose some CI failures, and I
 think we're far from exceeding the total maximum jobs.

 > (I'm seeing 5 builders allocated at a time when building this branch.)

 unfortunately, I can't find where I found this information, but I believe
 the maximum at the time that I wrote "4/6" and "2/6" was the lower of: 5
 Linux jobs, 2 Mac jobs, 6 total jobs (at any given time). therefore,
 adding Mac jobs and decreasing Linux jobs is expected to lower the total
 time.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24629#comment:22>
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