Map Nix attribute path to srcname

[rhendric]

As hypothesized in repology/repology-webapp#218.

[AMDmi3]

Let's add binname to NIX_PNAME mapping as discussed in the very same issue, right away.

[rhendric]

I don't think Nix has a binname, as you defined it, or if it does it's also the NIX_ATTRIBUTE_PATH. Attribute paths are used to install packages. Neither name is really used to refer to individual installed packages; store paths generally serve that purpose. Attribute paths can suffice in some circumstances but not every installed package corresponds to an attribute path. What a pname does is describe an installed package in terms that might be familiar to other users of that software on non-Nix platforms, but from the perspective of Nix a pname is not really an identifier, just some descriptive text.

But the most important thing to me is getting the attribute path exposed somehow so that Nix ecosystem tools can consume it, so if you want binname mapped to NIX_PNAME and you're okay with knowing that it's not really what you say it is then I don't really mind.

[AMDmi3]

Okay, makes sense.