This reverts commit 511aeba8.

Bionic has a recent coccinelle version, which passes our CI tests.

But Bionic (and Xenial) cause permissions errors for chutney.
We'll fix those in 32240.

Part of 31919.

Closes ticket 32241.

We need to mitigate slow scheduling of Travis macOS jobs.

Closes ticket 32177.

Since Travis macOS has IPv6 support (and Travis Linux does not), chutney
will now run its IPv6 networks as part of Travis CI.

But since chutney is slow, don't wait for the macOS chutney to finish.
(Travis have fixed the duplicate notification bug in fast_finish. So we
can use fast_finish and allow_failure to finish early. Unfortunately,
allow_failure also means we ignore failures in macOS chutney.)

Also make sure that we have:
* a compile on each platform, with each compiler,
* a check on each platform, and
* a check on each compiler.

Finally, sort builds: allow fail last, macOS first, slowest first.

Closes ticket 30860.
Closes ticket 31859 for 0.2.9.

Part of 31859.

The jobs should be the same, but Travis may display them differently.

Part of 31859.

Frequently, when a patch fails, it has failures in several files.
Using the "-k" flag will let us learn all the compilation errors,
not just the first one that the compiler hits.

Based on a patch by rl1987.

Linux is the first item in the os matrix, so we don't need to specify
it under matrix: include: .

Part of 29280.

Part of 29280.

Part of 29280.

Previously we had "make check" launched whenever DISTCHECK was
false.  Now we'd like to turn it off in a few other circumstances,
like running chutney.  Maybe stem too?

See: https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration

And fix a comment.

See:
https://gcc.gnu.org/onlinedocs/gcc/Gcov-Data-Files.html#Gcov-Data-Files

Since we have moved coveralls to the script target the entire build will
now fail if coveralls fail. We handle it more gracefully by echo'ing the
failure instead of doing a hard-failure.

See: https://bugs.torproject.org/29036

This should ensure that GCDA files are never entering the cache of
Travis CI.

See: https://bugs.torproject.org/29036

Use the Travis Homebrew addon to install packages on macOS. The package
list is the same, but the Homebrew addon does not do a `brew update` by
default.

This makes builds faster, at the cost of using slightly older packages.

Implements ticket 27738.

When we use echo in Travis, don't pass a --flag as the first argument.

Fixes bug 27418; bugfix on 0.3.4.7-rc.

When a Travis build fails, and showing a log fails, keep trying to
show the other logs.

Fixes bug 27453; bugfix on 0.3.4.7-rc.

It's redundant, because all the non-default builds use gcc on Linux.

Part of 27252.

Part of 27252.

Part of 27252.

Part of #27252.

Part of 24629.

Implements 27087.

Part of ticket 26952.

Tor 0.2.9 needs extra help to find OpenSSL on macOS.

Part of 24629.

Creating the configure flags once avoids inconsistent flags
between configure and distcheck configure.

Echoing the flags helps developers work out what configure is
doing.

(Backported to 0.2.9 and later as a precaution.)

Fixes 27088 on 0.3.4.1-alpha, adds logging in previous releases.

Also:
* explain why we don't install zlib

Part of 24629.

Build on all compilers:
* default options + hardening

Build on gcc:
* coverage (+ no hardening)
* distcheck
* no hardening

Add some extra logging:
* tail config.log on failure
  (config.log is too long for travis to render)

Put the config in a more logical order
* Sort config items in chronological order
* Put related items together

Part of 24629.

Taylor Yu authored 6 years ago and teor committed 6 years ago

Apparently we weren't building with either libcap or libseccomp on
Travis.  Install libcap-dev and libseccomp-dev in .travis.yml.  Closes
ticket 26560.

When Travis CI runs make distcheck, test-suite.log doesn't exist in
the expected place.  Add a new make target to show this file and use
it when DISTCHECK=yes in .travis.yml.  Fixes bug 25814; bug not in any
released Tor.

Implements 25814.

Closes ticket 25818.

Add some commented-out allow_failures clauses to make it easier to
temporarily allow less-critical sub-builds to fail while still
reporting success.