[SECP256K1] Fix the kitware PPA timeouts issues on Travis
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Authored by Fabien on Mar 4 2020, 13:17.

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rSTAGING792089422ada: [SECP256K1] Fix the kitware PPA timeouts issues on Travis
rABC792089422ada: [SECP256K1] Fix the kitware PPA timeouts issues on Travis

Summary

This is a follow-up for D5408. After several builds, I got one timeout
from the kitware PPA that caused a build failure.

This diff is installing cmake from the prebuilt binaries. It uses the
first supported stable version directly downloaded from cmake.org.

Hopefully this will make the cmake installation more robust on Travis.
It makes no difference in the build duration.

Test Plan

Run the Travis build (see
https://travis-ci.org/Fabcien/secp256k1/builds/657837937).

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rABC Bitcoin ABC

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Event Timeline

Fabien created this revision.Mar 4 2020, 13:17

Herald added a reviewer: Restricted Project. · View Herald TranscriptMar 4 2020, 13:17

Build Bitcoin-ABC / Diffs / Diff Testing started.

Harbormaster completed remote builds in B9727: Diff 16765.Mar 4 2020, 13:29

Build Bitcoin-ABC / Diffs / Diff Testing passed.

You need to use travis's cache directory functionality. See https://github.com/SDC-Developers/SDC/blob/master/.travis.yml#L19 or an exemple. This is ensure that you only download cmake once in a while.

I looked into this but I think it is falling in the case where it is not recommended:

From https://docs.travis-ci.com/user/caching/#things-not-to-cache:

Large files that are quick to install but slow to download do not benefit from caching, as they take as long to download from the cache as from the original source

Looking at how the cache works:

Without cache, we are downloading an archive from cmake.org and extracting it to the filesystem.
With the cache, we are downloading an archive from Travis servers and extracting it to the filesystem.

So I don't expect any gain from caching here.

For info the total DL + installation time is < 2s on average.

The gain you'll have are reliability gains. If kitware is down,t he build still passes. If travis is down, then the build won't pass regardless of kitware.

This revision now requires changes to proceed.Mar 5 2020, 16:51

Good point, I'll set the cache.

Use Travis cache.

Build Bitcoin-ABC / Diffs / Diff Testing started.

Build Bitcoin-ABC / Diffs / Diff Testing passed.

Harbormaster completed remote builds in B9740: Diff 16783.Mar 5 2020, 20:58

deadalnix accepted this revision.Mar 5 2020, 23:36

This revision is now accepted and ready to land.Mar 5 2020, 23:36

For reference, an example build where the cache is being used: https://travis-ci.org/Fabcien/secp256k1/builds/659036916.

Closed by commit rABC792089422ada: [SECP256K1] Fix the kitware PPA timeouts issues on Travis (authored by Fabien). · Explain WhyMar 6 2020, 13:39

This revision was automatically updated to reflect the committed changes.

Fabien added a commit: rABC792089422ada: [SECP256K1] Fix the kitware PPA timeouts issues on Travis.