Launch julia and load all stdlibs after install, to move any OS checks to install time about juliaup HOT 8 CLOSED

Happy to add it on this end, if someone figures out what exact Julia expression we should run.

Also, just FYI: at the moment we can't release new builds to everyone because we are in the middle of changing the code signing for Windows. Or rather, I switched everything over already, but then it turned out that the new cert is not the right one, so we now have to wait until this is resolved...

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Maybe:

julia --startup-file=no -e 'import Base64; foreach(p -> @eval(import $(Symbol(p))), readdir(pkgdir(Base64, "..")))'

Base64 isn't special here, just a zero dep stdlib to find the stdlib source directory.

Probably only worth doing this on 1.10+ where stdlibs can have pkgimages.

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In terms of timing, on my M2 macbook on a reasonable internet connection this would add 16s to install time.
(I see Statistics and its ext is getting precompiled, which it shouldn't.. so that's a julia bug to fix)

% time julia +nightly --startup-file=no -e 'import Base64; foreach(p -> @eval(import $(Symbol(p))), readdir(pkgdir(Base64, "..")))'
Precompiling Statistics...
  1 dependency successfully precompiled in 1 seconds
Precompiling SparseArraysExt...
  1 dependency successfully precompiled in 1 seconds. 4 already precompiled.
julia +nightly --startup-file=no -e   2.88s user 1.38s system 25% cpu 16.538 total


% time julia +nightly --startup-file=no -e 'import Base64; foreach(p -> @eval(import $(Symbol(p))), readdir(pkgdir(Base64, "..")))'
julia +nightly --startup-file=no -e   1.36s user 0.84s system 223% cpu 0.985 total

Personally I think that's quite excessive, and I would've thought it would be worse for a Windows user?

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We don't have to wait into it finished, right? I could just launch a detached process that runs that and forget about it?

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True

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The Statistics issue above was because of a custom Statistics version being reachable in my default env. So we need to

JULIA_LOAD_PATH=@stdlib julia +nightly --startup-file=no -e 'import Base64; foreach(p -> @eval(import $(Symbol(p))), readdir(pkgdir(Base64, "..")))'

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From a little testing this is more robust

JULIA_LOAD_PATH=@stdlib julia +nightly --startup-file=no -e 'foreach(p -> @eval(import $(Symbol(p))), filter!(x -> isfile(joinpath(Sys.STDLIB, x, "src", "$(x).jl")), readdir(Sys.STDLIB)))'

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@davidanthoff can we get this in before the final 1.11 rc so that we can test it in the wild?

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