add some missing hash definitions (#4228)

(cherry picked from commit cb88750)

Author: KristofferC

src/Types.jl

@@ -85,7 +85,8 @@ end
 
 Base.:(==)(r1::GitRepo, r2::GitRepo) =
     r1.source == r2.source && r1.rev == r2.rev && r1.subdir == r2.subdir
-
+Base.hash(r::GitRepo, h::UInt) =
+    foldr(hash, [r.source, r.rev, r.subdir], init=h)
 
 mutable struct PackageSpec
     name::Union{Nothing,String}
@@ -119,11 +120,15 @@ PackageSpec(name::AbstractString, uuid::UUID) = PackageSpec(;name=name, uuid=uui
 PackageSpec(name::AbstractString, version::VersionTypes) = PackageSpec(;name=name, version=version)::PackageSpec
 PackageSpec(n::AbstractString, u::UUID, v::VersionTypes) = PackageSpec(;name=n, uuid=u, version=v)::PackageSpec
 
+# XXX: These definitions are a bit fishy. It seems to be used in an `==` call in status printing
 function Base.:(==)(a::PackageSpec, b::PackageSpec)
     return a.name == b.name && a.uuid == b.uuid && a.version == b.version &&
     a.tree_hash == b.tree_hash && a.repo == b.repo && a.path == b.path &&
     a.pinned == b.pinned
 end
+function Base.hash(a::PackageSpec, h::UInt)
+    return foldr(hash, [a.name, a.uuid, a.version, a.tree_hash, a.repo, a.path, a.pinned], init=h)
+end
 
 function err_rep(pkg::PackageSpec)
     x = pkg.name !== nothing && pkg.uuid !== nothing ? x = "$(pkg.name) [$(string(pkg.uuid)[1:8])]" :

test/new.jl

@@ -3184,4 +3184,6 @@ end
     @test occursin("[loaded: v0.5.4]", out)
 end
 
+@test allunique(unique([Pkg.PackageSpec(path="foo"), Pkg.PackageSpec(path="foo")]))
+
 end #module