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Google Is 2B Lines of Code, All in One Place

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Re: Google Is 2B Lines of Code, All in One Place

#341

Post by breatheoften »

thrownaway2424 wrote: post #264
breatheoften wrote: post #248

Are the source of piper and the build tools also in the mono repo and also developed/deployed off the head branch? Seems like a random engineer could royally fubar things if they broke a service which the build system depends on ...

You said "developed/deployed" as if it were the same thing. Even if you somehow checked in the giant flaw, bypassing all code review and automated testing, it's not like that would suddenly appear in production. Google isn't some PHP hack where you just copy a tarball to The Server. Binaries of even slightly important systems typically go through many stages of deployment, first into unimportant test systems, then us…

I see - it was something of a half baked thought but in my defense I wasn't trying to suggest that I thought the head was automatically deployed to production ... Deployed to testing round 1 ... N is still a "deployment" isn't it ...? The shared boilerplate for how that magic works in a scaleable way for so many different projects must be quite complex and itself hard to test ...

Re: Google Is 2B Lines of Code, All in One Place

#343

Post by shostack »

andor wrote: post #216
shostack wrote: post #79

Earlier quoted context omitted.

Wow, $150? Shocked there isn't a cheaper USB version that is more easily hackable. I mean, is it really more than color-changing LEDs in a plastic sphere?

blink(1) is a small USB light to give you glanceable notice of anything on your computer or the internet. blink(1) makes it easy to connect data sources in the cloud or on your computer to a full-color RGB LED so you can know what’s happening https://blink1.thingm.com/

Thanks for the link--looks awesome, wish the form factor were a bit larger and not so directly attached to the computer. I'll bet I could create an extension cable for it and rip off the housing to make the LEDs allow more light through, then put it in a translucent plastic sphere.

Re: Google Is 2B Lines of Code, All in One Place

#344

Post by luckydude »

ajross wrote: post #66
sandGorgon wrote: post #65

What are the best practices to follow in a single-repo-multiple-projecrs world? Some people recommend git submodule, others recommend subtree. How do you guys manage alerts and messages - does every developer get a commit notification,or is there a way to filter out messages based upon submodule. How does branching and merging work? I'm wondering what processes are used by non-Google/FB teams to help them be more pro…

FWIW: git submodules are not a single repo by definition. It's just a way to automate the checkout of specifically-versioned external projects without requiring hackery like packing tarballs into the project source. It has its uses, but it's definitely not what they're talking about here.

Agree 100%. Git submodules are for tracking other stuff, not for doing dev on that other stuff.

If you would like to see how things would work with submodules that behaved just like files behave (full distributed workflow) we've got a (unfortunately commercial) solution here:

http://www.bitkeeper.com/nested

Re: Google Is 2B Lines of Code, All in One Place

#345

Post by fengqu »

4ad wrote: post #132
antics wrote: post #119

Earlier quoted context omitted.

I can't say. I work here, but I don't speak for the company.

Well, you just said what it doesn't have, so I guess you speak for the company after all. Anyway, let me guess. Judging by how the size of all binaries shipped with Windows varied between releases, I'd be inclined to think Windows 10 does not have significantly more lines of code than Windows Vista. So I'd guess at most 100 million lines of code?

微软

Re: Google Is 2B Lines of Code, All in One Place

#346

Post by fengqu »

4ad wrote: post #132
antics wrote: post #119

Earlier quoted context omitted.

I can't say. I work here, but I don't speak for the company.

Well, you just said what it doesn't have, so I guess you speak for the company after all. Anyway, let me guess. Judging by how the size of all binaries shipped with Windows varied between releases, I'd be inclined to think Windows 10 does not have significantly more lines of code than Windows Vista. So I'd guess at most 100 million lines of code?

谷歌

Re: Google Is 2B Lines of Code, All in One Place

#347

Post by rictic »

Touche wrote: post #98
durin42 wrote: post #89

Earlier quoted context omitted.

Google has tons of services internally that talk via RPC. The monolithic repo means that it's much easier to hunt down and find people that are (say) using an outdated RPC method and help them fix their code. (Just one example of how it's useful even when things are mostly services.)

This discourages you from ever making breaking changes to an API. On the face of it that sounds good but sometimes you do have to make breaking changes. My guess is that there are many duplicate projects in the Google code base for when a breaking change is needed. This is a way to sidestep the problem.

As someone who's responsible for migrating the users of a large breaking change (~300 projects), it does discourage you from making a breaking change. I'm not convinced that this is a bad thing though. Breaking changes can be both expensive and tempting. By making the author of such a change feel the cost of it you prevent the migration work from becoming an externality.

It also encourages writing tools for automating this stuff. A big part of the motivation for polyup (https://github.com/PolymerLabs/polyup) was the fact that we'd be responsible for getting people to upgrade.

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