bug for Julia 1.6: reachable_registries not defined

[tfiers]

From

• Crawl registry (→ to rm restriction "Only works for pkgs in active project") #5 (comment) :

PkgDep's reachable_registries() (https://github.com/JuliaEcosystem/PkgDeps.jl/blob/a568954/src/PkgDeps.jl#L71) is not necessary. merged in base mayb.
mayb is necessary for 1.6

[tfiers]

So sth like

joinpath(Base.DEPOT_PAT, "registries", 
reachable_registries() = [RegistryInstance(joinpath(reg_dir, name)))]

.. hm

julia> DEPOT_PATH
3-element Vector{String}:
 "C:\\Users\\tfiers\\.julia"
 "C:\\Julia-1.8.1\\local\\share\\julia"
 "C:\\Julia-1.8.1\\share\\julia"

julia> @edit Pkg.Registry.reachable_registries()

gives

src

function reachable_registries(; depots::Union{String, Vector{String}}=Base.DEPOT_PATH)
    # collect registries
    if depots isa String
        depots = [depots]
    end
    registries = RegistryInstance[]
    for d in depots
        isdir(d) || continue
        reg_dir = joinpath(d, "registries")
        isdir(reg_dir) || continue
        reg_paths = readdir(reg_dir; join=true)
        candidate_registries = String[]
        # All folders could be registries
        append!(candidate_registries, filter(isdir, reg_paths))
        if registry_read_from_tarball()
            compressed_registries = filter(endswith(".toml"), reg_paths)
            # if we are reading compressed registries, ignore compressed registries
            # with the same name
            compressed_registry_names = Set([splitext(basename(file))[1] for file in compressed_registries])
            filter!(x -> !(basename(x) in compressed_registry_names), candidate_registries)
            for compressed_registry in compressed_registries
                if verify_compressed_registry_toml(compressed_registry)
                    push!(candidate_registries, compressed_registry)
                end
            end
        end

        for candidate in candidate_registries
            # candidate can be either a folder or a TOML file
            if isfile(joinpath(candidate, "Registry.toml")) || isfile(candidate)
                push!(registries, RegistryInstance(candidate))
            end
        end
    end
    return registries
end

[tfiers]

eh if you see ?DEPOT_PATHS,
we may do:

user_depot = first(DEPOT_PATHS)
RegistryInstance(joinpath(user_depot, "registries", "General.toml"))

[tfiers]

(it also didn't have RegistryInstance. and more, probably. seems like total rewrite. so yeah, no, byeeh!)

btw, I think you can analyse old pkg versions -- incl "julia 1.6 pkgs" -- while in a newer julia