Re: Guix closure size of a system?

[Pierre Neidhardt]

This works, thanks!

Should we document it in `guix size -h`?

I think the result is interesting with respect to the discussion we had
about shrinking the closure sizes in Guix:

--8<---------------cut here---------------start------------->8---
> guix size /gnu/store/alydrspjw3sfc6b01kyz30vjhjrny86c-system
store item                                                       total    self
/gnu/store/w8gjhcw6a16rk1dvxa97bz2znal5fihm-go-1.13.9              639.1   
350.7   6.8%
/gnu/store/9qs1v87rv4ch7x07adbx8pfnkjxm39d1-guix-1.1.0-4.bdc801e   467.8   
268.9   5.2%
/gnu/store/cpx45dbix533r2yx73jbv8fd0h8c3vyn-linux-5.4.41           244.0   
244.0   4.7%
/gnu/store/6hnk449wv8vhbrm0in0ychqiwipsqyza-docker-19.03.7        1245.3   
195.7   3.8%
/gnu/store/n08as2lvmcc14q57bq1z8p7r1kaa1vv2-gnome-getting-started-docs-3.32.2   
164.0   164.0   3.2%
/gnu/store/skxkrhgn9z0fg9hmnbcyfdgzs5w4ryrr-llvm-9.0.1             199.9   
128.5   2.5%
/gnu/store/da1lys4i2yxl549iwkbdg1fb7azphniw-emacs-26.3            1181.3   
128.1   2.5%
/gnu/store/8jn365r0kk69j1f4b1q2b7aa2qm1xvg1-mesa-19.3.4            341.6   
114.6   2.2%
/gnu/store/rn75fm7adgx3pw5j8pg3bczfqq1y17lk-gcc-7.5.0              178.5   
107.3   2.1%
/gnu/store/rsjdq6b0csxc16mbapx5yvrc2zrk20za-containerd-1.2.5       755.7   
105.9   2.0%
/gnu/store/vnivzyfy0bcxz8rn9gasav5k7skax57y-samba-4.12.2           594.1    
98.8   1.9%
/gnu/store/1hrwdsd5fwn3xmdgnpyg2h1j5jr6q8ws-webkitgtk-2.28.2       930.4    
98.2   1.9%
/gnu/store/znly83q0jmcqg6ppwbz5marj5ix9vkk2-locale-2.31             91.9    
91.9   1.8%
/gnu/store/ikcjpg1y0mb5qinpdc0q85xvm53cz80q-locale-2.28             91.8    
91.8   1.8%
/gnu/store/09a5iq080g9b641jyl363dr5jkkvnhcn-python-3.8.2           171.4    
79.8   1.5%
/gnu/store/fj33c1nw4v81qcd33wp53f3aa01g3m9d-ibus-1.5.22            946.2    
66.3   1.3%
/gnu/store/sd278fsdfx5hjrcgncflnp9qq4l42p1c-python2-2.7.17         151.7    
61.1   1.2%
/gnu/store/8zvc5mvk0xm3ygrxsgpyy5ilxb5rzjry-perl-5.30.2            146.2    
57.1   1.1%
/gnu/store/lvnv80g5iqf7fqlckadjfrad9999d4f7-mozjs-60.2.3-2         248.3    
54.7   1.1%
/gnu/store/ljcrz0d86r20phszvj6s1mdyjchz79ja-guile-static-stripped-3.0.2    54.7 
   54.7   1.1%
/gnu/store/m1z7cdbqsqyp9xnjw5cvlb4a7gkcg3m4-binutils-2.34           93.0    
54.6   1.1%
/gnu/store/18hp7flyb3yid3yp49i6qcdq0sbi5l1n-guile-3.0.2            132.8    
53.2   1.0%
/gnu/store/0m0vd873jp61lcm4xa3ljdgx381qa782-guile-3.0.2            132.8    
53.2   1.0%
/gnu/store/fii66zlqdzv3kbfdbzmj33vvxfwvj33h-gnome-user-docs-3.32.3    49.9    
49.9   1.0%
[...]
--8<---------------cut here---------------end--------------->8---

- go: I think I've got go because of docker, but go should be a
  build-time dependency, I don't think it belong here.

- llvm: I think it's mostly dragged by Mesa.
  Mesa depends on some LLVM libs, but not all of llvm:
  https://www.archlinux.org/packages/extra/x86_64/mesa/

Moving the llvm libs to a "lib" output could reduce the closure size of
many packages I believe.

Thoughts?

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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