Attempt to fix Travis-CI timeouts due to build caches

[iceiix]

AppVeyor is working but Travis-CI is always failing some builds:

example: https://travis-ci.org/iceiix/stevenarella/builds/539101869?utm_source=github_status&utm_medium=notification

Setting up build cache
$ export CASHER_DIR=${TRAVIS_HOME}/.casher
0.14s$ Installing caching utilities
0.00s43.17sattempting to download cache archive
fetching structopt-0.2.16/cache-linux-trusty-e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855--cargo-stable.tgz
fetching structopt-0.2.16/cache--cargo-stable.tgz
fetching dependabotcargostructopt-0.2.16/cache-linux-trusty-e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855--cargo-stable.tgz
fetching dependabotcargostructopt-0.2.16/cache--cargo-stable.tgz
fetching master/cache-linux-trusty-e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855--cargo-stable.tgz
found cache
0.00sadding /home/travis/.cargo to cache
creating directory /home/travis/.cargo
adding /home/travis/build/iceiix/stevenarella/target to cache
creating directory /home/travis/build/iceiix/stevenarella/target
No output has been received in the last 10m0s, this potentially indicates a stalled build or something wrong with the build itself.
Check the details on how to adjust your build configuration on: https://docs.travis-ci.com/user/common-build-problems/#Build-times-out-because-no-output-was-received
The build has been terminated

[iceiix]

Linux with stable Rust is failing, but macOS with stable Rust succeeds. Doesn't even get to the point where it begins the build. Rust nightly with Linux, and WASM=false also fails with the same error./

Nightly on macOS fails with a different error, it actually completes building and running tests, but times out uploading the build cache:

store build cache...
changes detected, packing new archive
The job exceeded the maximum time limit for jobs, and has been terminated.

WASM=true fails due to wasm-pack crashing:

Well, this is embarrassing. wasm-pack had a problem and crashed. To help us diagnose the problem you can send us a crash report.

Except for this last error, all the problems appear cache-related. https://travis-ci.org/iceiix/stevenarella/caches shows quite a big cache:

Going to try deleting all caches...

[iceiix]

Oh no! Could not delete the caches

I guess Travis-CI caching is messed up somehow.

Maybe related to https://blog.travis-ci.com/2019-01-23-travis-ci-joins-idera-inc https://news.ycombinator.com/item?id=18978251 a prescient comment:

Travis will likely slow rot under Idera, looking at how its owned by a private equity firm.

alternatives:

Personally, I've seen growing stability issues. Builds are failing for no apparent reason and work fine after a manual restart. Circe CI was the next free service to try.

Yeah, I've been seeing lots of people switch to circle-ci or gitlab over the past year.

Worth plugging https://sr.ht ... also be able to build on platforms like RISC-V, which I don't think anybody else offers.

At my company we've just finished migrating our Android builds from CircleCI to Buildkite

[iceiix]

"Solved" by disabling Travis-CI, but this regresses Linux and Mac continuous integration.

Signed up for https://buildkite.com/stevenarella but it requires running on your own infrastructure. Maybe an option, but more than I can setup right now. Next to try: https://circleci.com/setup-project/gh/iceiix/stevenarella