pkgid.jl
# This file is a part of Julia. License is MIT: https://julialang.org/license
struct PkgId
uuid::Union{UUID,Nothing}
name::String
PkgId(u::UUID, name::AbstractString) = new(UInt128(u) == 0 ? nothing : u, name)
PkgId(::Nothing, name::AbstractString) = new(nothing, name)
end
PkgId(name::AbstractString) = PkgId(nothing, name)
function PkgId(m::Module, name::String = String(nameof(moduleroot(m))))
uuid = UUID(ccall(:jl_module_uuid, NTuple{2, UInt64}, (Any,), m))
UInt128(uuid) == 0 ? PkgId(name) : PkgId(uuid, name)
end
==(a::PkgId, b::PkgId) = a.uuid == b.uuid && a.name == b.name
function hash(pkg::PkgId, h::UInt)
h += 0xc9f248583a0ca36c % UInt
h = hash(pkg.uuid, h)
h = hash(pkg.name, h)
return h
end
show(io::IO, ::MIME"text/plain", pkg::PkgId) =
print(io, pkg.name, " [", pkg.uuid === nothing ? "top-level" : pkg.uuid, "]")
function binpack(pkg::PkgId)
io = IOBuffer()
write(io, UInt8(0))
uuid = pkg.uuid
write(io, uuid === nothing ? UInt128(0) : UInt128(uuid))
write(io, pkg.name)
return String(take!(io))
end
function binunpack(s::String)
io = IOBuffer(s)
@assert read(io, UInt8) === 0x00
uuid = read(io, UInt128)
name = read(io, String)
return PkgId(UUID(uuid), name)
end