Faster Builds with Container-Based Infrastructure and Docker

Some rough numbers: bundle install has gone from ~50s to 3s for my Jekyll + s3_website setup. The overall build has dropped from ~120s to 45s thanks to that and using a cached version of Ruby.

One gotcha for anyone with a similar setup: make sure Jekyll's _config.yml is set to exclude/ignore the vendor directory. Oops.

This is exciting news - it's a shame that sudo isn't supported in the Travis-CI Docker containers (is this common for all Docker containers?). Uploading binaries to S3 and then downloading them to use in the build process seems like a total faff - I use Travis-CI to avoid that kind of hassle...

I already liked some of the UI updates I was seeing on Travis yesterday - this sounds like it could solve some of my (few) issues with Travis' consistency and speed! Excited to dig in further.

E1: Removed incorrect possessive form of Travis.

That's a great news. I see ppl setup their own CI, b/c they need some custom stuff.

With Travis CI supporting docker, it is way easier to do that with them.

Wow this really is only the beginning of you offering better, faster and more reliable builds on Travis CI. You seem to have a lot more things planned to improve stability, I'm totally excited that you shipped this today.