[tor-bugs] #30928 [Core Tor]: macOS Travis Homebrew cache has expired, failing some builds

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#30928: macOS Travis Homebrew cache has expired, failing some builds
-------------------------+-------------------------------------------------
     Reporter:  teor     |      Owner:  (none)
         Type:  task     |     Status:  new
     Priority:  High     |  Milestone:
    Component:  Core     |    Version:
  Tor                    |   Keywords:  041-must, tor-ci-fail-sometimes,
     Severity:  Major    |  chutney-ci-fail, stem-ci-fail
Actual Points:           |  Parent ID:
       Points:           |   Reviewer:
      Sponsor:           |
-------------------------+-------------------------------------------------
 The Homebrew cache in the Travis macOS image has expired (or desynced),
 failing our chutney and stem builds:
 {{{
 Tapped 0 formulae (172 files, 244.5KB)
 Error: Your Homebrew is outdated. Please run `brew update`.
 Error: Kernel.exit
 }}}
 https://travis-ci.org/torproject/stem/jobs/547493246#L87
 https://travis-ci.org/torproject/chutney/jobs/548092876#L95

 Our tor builds don't fail, but they aren't running shellcheck on macOS any
 more. That's probably ok.
 {{{
 Tapped 0 formulae (172 files, 244.5KB)
 Error: Your Homebrew is outdated. Please run `brew update`.
 Error: Kernel.exit
 }}}
 https://travis-ci.org/torproject/tor/jobs/547856188#L104

 There should be a shellcheck here:
 {{{
 sfcgal 1.3.5
 sqlite 3.24.0
 }}}
 https://travis-ci.org/torproject/tor/jobs/547856188#L182

 There should be a result here:
 {{{
 if command -v shellcheck; then \
                 find "." -name "*.sh" -not -path "./src/ext/*" -exec
 shellcheck {} +; \
                 if [ -d "./scripts/test" ]; then \
                         shellcheck ./scripts/test/cov-diff
 ./scripts/test/coverage; \
                 fi; \
                 if [ -e "./contrib/dirauth-tools/nagios-check-tor-
 authority-cert" ]; then \
                         shellcheck "./contrib/dirauth-tools/nagios-check-
 tor-authority-cert"; \
                 fi; \
                 if [ -e "./contrib/client-tools/torify" ]; then \
                         shellcheck "./contrib/client-tools/torify"; \
                 fi; \
                 if [ -d "./scripts/git" ]; then \
                         shellcheck ./scripts/git/*.git-hook; \
                 fi; \
         fi
 }}}
 https://travis-ci.org/torproject/tor/jobs/547856188#L3149

 We can fix this in a few different ways:
 1. make shellcheck optional in the chutney and stem Travis CI
   * it will run on Linux, but not macOS. That's ok.
 2. add the `update: true` key to our Travis macOS builds
   * https://docs.travis-ci.com/user/installing-dependencies/#installing-
 packages-on-macos
   * a full update makes macOS builds slower, so we should open a ticket to
 eventually remove it
 3. allow_failure on the chutney and stem macOS Travis jobs
   * https://docs.travis-ci.com/user/build-matrix/#rows-that-are-allowed-
 to-fail

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30928>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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