[Nix-dev] What are the rules about 'share/' directory symlinking to profile?

[Guillaume Maudoux (Layus)]

Hi,

`nix-env -i $(nix-build -A fzf.out)` works.
Somehow, `nix-env -f . -iA fzf.out` still installs `fzf.bin`.

Now, that package is quite strange. Normally, the first output in the 
outputs list should be the one that refers to all the others.
It is not the case here, because fzf.bin does not reference fzf.out for 
example.
Also, it could specify outputsToInstall, but it does not.

See http://nixos.org/nixpkgs/manual/#idm140737318250400 and related 
issues to dig deeper into this.
But please keep in mind that nix received only maintenance update since 
Jan 19, 2016.
A lot of merged features are not available in any release.

-- Layus.

On 20/04/17 13:33, Alexey Lebedeff wrote:
> I've tried with fzf.out and it also doesn't add anything to 'share' in
> profile folder. The only way I was able to make it work is by adding
> 'share' folder to 'bin' output. Looks like some magic is attached to
> 'bin' itself (because I've also tried reordering outputs without any
> change) - but I can't figure out how and why this is happening.
>
> 1) For fzf.out 'vim-plugins' folder is not added to profile after installation
>
>     $ nix-build . -A fzf.out
>     /nix/store/mp5drsp2l1z7k0rp4jjmll06kjck7052-fzf-0.16.6
>
>     # 'share' is present in nix store
>     $ ls ./result/share/vim-plugins/ -l
>     total 4
>     lrwxrwxrwx 1 root root 91 Jan  1  1970 fzf-0.16.6 -> /nix/store/mp5drsp2l1z7k0rp4jjmll06kjck7052-fzf-0.16.6/share/go/src/github.com/junegunn/fzf
>
>     $ nix-env -f . -iA fzf.out
>
>     # But it's missing from profile even after explicitly installing that
>     $ ls -la ~/.nix-profile/share/vim-plugins
>     ls: cannot access '/home/binarin/.nix-profile/share/vim-plugins': No such file or directory
>
> 2) But everything works if I add 'share' folder to 'bin' output instead, using the following
>     lines in postInstall:
>
>     +    mkdir -p $bin/share/vim-plugins
>     +    cp -a $out/share/go/src/github.com/junegunn/fzf $bin/share/fzf-tmp
>     +    ln -s $bin/share/fzf-tmp $bin/share/vim-plugins/${name}
>
>     $ nix-build . -A fzf.bin
>     /nix/store/3dzqj1xk6s5jfm1z4kwnkfdg9yw3xckr-fzf-0.16.6-bin
>
>     $ ls ./result-bin/share/vim-plugins/ -l
>     total 4
>     lrwxrwxrwx 1 root root 72 Jan  1  1970 fzf-0.16.6 -> /nix/store/3dzqj1xk6s5jfm1z4kwnkfdg9yw3xckr-fzf-0.16.6-bin/share/fzf-tmp
>
>     $ nix-env -f . -iA fzf.bin
>
>     $ ls -la ~/.nix-profile/share/vim-plugins
>     lrwxrwxrwx 1 root root 76 Jan  1  1970 /home/binarin/.nix-profile/share/vim-plugins -> /nix/store/3dzqj1xk6s5jfm1z4kwnkfdg9yw3xckr-fzf-0.16.6-bin/share/vim-plugins
>
> Best,
> Alexey
>
>
> Guillaume Maudoux (Layus) writes:
>
>> I guess the idea is that you need to install `fzf.out` explicitly,
>> because installing `fzf` installs the first output, which is `fzf.bin`.
>>
>> -- Layus.
>>
>>
>> On 20/04/17 11:46, Alexey Lebedeff wrote:
>>> Hi folks.
>>>
>>> What are the rules about how and when 'share/' folder of (multi-output)
>>> derivation will be merged into 'share/' folder of profile?
>>>
>>> E.g. I can't see content of
>>> https://github.com/NixOS/nixpkgs/blob/4a0be7837cadf9b6e9cae430d80f65a2af60dcc6/pkgs/tools/misc/fzf/default.nix#L33
>>> anywhere in my profile 'share/' even after installing every output
>>>
>>> Only when I move 'share/' to '$bin' output, it starts appearing in profile
>>> 'share/' folder.
>>>
>>> Best,
>>> Alexey
>>> _______________________________________________
>>> nix-dev mailing list
>>> nix-dev at lists.science.uu.nl
>>> https://mailman.science.uu.nl/mailman/listinfo/nix-dev

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