We are migrating packages that meet below requirements:
1. using `callPackage`
2. called path is a directory
3. overriding set is empty (`{ }`)
4. not containing path expressions other than relative path (to
makenixpkgs-vet happy)
5. not referenced by nix files outside of the directory, other
than`pkgs/top-level/all-packages.nix`
6. not referencing nix files outside of the directory
7. not referencing `default.nix` (since it's changed to `package.nix`)
8. `outPath` doesn't change after migration
The tool is here: https://github.com/Aleksanaa/by-name-migrate.
This change switches the xar package from unmaintained fork of the
original project to the Apple Open Source tarball. See also
https://repology.org/project/xar/versions
Since the package is essentially rewritten from scratch, we take an
opportunity and move it to pkgs/by-name/xa/xar (formatted with nixfmt).
We also remove Windows from the supported platforms because even before
this change pkgsCross.mingwW64.xar failed with
xar> configure: error: can not detect the size of your system's uid_t type
The nixpkgs-unstable channel's programs.sqlite was used to identify
packages producing exactly one binary, and these automatically added
to their package definitions wherever possible.
