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by ozten 3489 days ago
As I understand it, one of the original problems Go was designed to solve was long compile times at Google.

This talk is fascinating and points out a possible solution space for real world problems in giant codebases and build infrastructures.

What if 80% of your dependency graph can be identified as dead code paths at build time and not require you to actually take dependencies on all that dead code?
1 comments
_halgari 3489 days ago
Sadly then Go went and shot themselves in the foot. Originally (I assumed this hasn't changed), you specified dependencies via git URLs. Sounds great, but then they went and said every dependency always used the head of master. So now you're in the horrific situation of your deps suddenly changing whenever your build decides to pull the latest from the git repos.

(Note: I don't use go, but this was the situation about 3 years ago when I last looked).

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anonfunction 3489 days ago
I've always found this to be overlooked or at least a misguided design decision. IMO would be very helpful to be able to specify a commit, tag or branch to pull down.

The Go team's solution to this problem was allowing vendored dependencies. Basically you can put the dependencies inside your project in a directory called vendor which will be used instead of whatever is in your $GOPATH/src/. This allows you to pin deps to a specific version and not need to pull deps from the internet at all.

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NightMKoder 3489 days ago
One of the things Rich talks about in this talk is semantic versioning is fundamentally broken. In fact any versioning scheme that allows removal is broken. In some sense this model encourages Rich's ideas better - since you can't version directly, you either make a new library or maintain backwards compatibility.

Of course the current 'go get' model has a lot of downsides, e.g. Non deterministic builds. I still think it's worth considering building on, rather than trying to fix semver. All that's really missing is a stable monotonic identifier - something as simple as git tree height may be enough.

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_halgari 3489 days ago
Absolutely, I think the "perfect world" would be adopting some of the ideas Rich proposes but adding (git url + sha) as the dependency management system.

Of course for that to work well you'd also need to protect yourself from people deleting their git hub repos, or rewriting git history.

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robto 3488 days ago
Which is a great use case for something like ipfs, I think.
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