fix pin on repo added packages (#268)

* fix pin on repo added packages

* more pin free fixes

stdlib/Pkg3/src/API.jl

@@ -176,7 +176,22 @@ function free(ctx::Context, pkgs::Vector{PackageSpec}; kwargs...)
     Context!(ctx; kwargs...)
     ctx.preview && preview_info()
     registry_resolve!(ctx.env, pkgs)
-    ensure_resolved(ctx.env, pkgs; registry=true)
+    uuids_in_registry = UUID[]
+    for pkg in pkgs
+        pkg.mode = PKGMODE_MANIFEST
+    end
+    for pkg in pkgs
+        has_uuid(pkg) && push!(uuids_in_registry, pkg.uuid)
+    end
+    manifest_resolve!(ctx.env, pkgs)
+    ensure_resolved(ctx.env, pkgs)
+    # Every non pinned package that is freed need to be in a registry
+    for pkg in pkgs
+        info = manifest_info(ctx.env, pkg.uuid)
+        if !get(info, "pinned", false) && !(pkg.uuid in uuids_in_registry)
+            cmderror("cannot free an unpinned package that does not exist in a registry")
+        end
+    end
     Operations.free(ctx, pkgs)
     return
 end

stdlib/Pkg3/src/Operations.jl

@@ -80,7 +80,7 @@ function collect_fixed!(ctx::Context, pkgs::Vector{PackageSpec}, uuid_to_name::D
     for pkg in pkgs
         local path
         info = manifest_info(ctx.env, pkg.uuid)
-        if pkg.special_action == PKGSPEC_FREED
+        if pkg.special_action == PKGSPEC_FREED && !haskey(info, "pinned")
             continue
         elseif pkg.special_action == PKGSPEC_DEVELOPED
             @assert pkg.path !== nothing
@@ -596,17 +596,25 @@ function update_manifest(ctx::Context, pkg::PackageSpec, hash::Union{SHA1, Nothi
     info["version"] = string(version)
     hash == nothing ? delete!(info, "git-tree-sha1") : (info["git-tree-sha1"] = string(hash))
     path == nothing ? delete!(info, "path")          : (info["path"]          = relative_project_path_if_in_project(ctx, path))
-    if special_action in (PKGSPEC_FREED, PKGSPEC_DEVELOPED)
+    if special_action == PKGSPEC_DEVELOPED
         delete!(info, "pinned")
         delete!(info, "repo-url")
         delete!(info, "repo-rev")
+    elseif special_action == PKGSPEC_FREED
+        if get(info, "pinned", false)
+           delete!(info, "pinned")
+        else
+            delete!(info, "repo-url")
+            delete!(info, "repo-rev")
+        end
     elseif special_action == PKGSPEC_PINNED
         info["pinned"] = true
     elseif special_action == PKGSPEC_REPO_ADDED
         info["repo-url"] = repo.url
         info["repo-rev"] = repo.rev
         path = find_installed(name, uuid, hash)
-    elseif haskey(info, "repo-url")
+    end
+    if haskey(info, "repo-url")
         path = find_installed(name, uuid, hash)
     end
 

stdlib/Pkg3/src/REPLMode.jl

@@ -339,7 +339,7 @@ What action you want the package manager to take:
 
 `develop`: clone the full package repo locally for development
 
-`free`: undoes a `pin` or `develop`
+`free`: undoes a `pin`, `develop`, or stops tracking a repo.
 
 `precompile`: precompile all the project dependencies
 """

stdlib/Pkg3/test/repl.jl

@@ -64,8 +64,11 @@ temp_pkg_dir() do project_path; cd(project_path) do; mktempdir() do tmp_pkg_path
     pkg2 = "UnregisteredWithProject"
     p2 = git_init_package(tmp_pkg_path, joinpath(@__DIR__, "test_packages/$pkg2"))
     Pkg3.REPLMode.pkgstr("add $p2")
+    Pkg3.REPLMode.pkgstr("pin $pkg2")
     @eval import $(Symbol(pkg2))
     @test Pkg3.installed()[pkg2] == v"0.1.0"
+    Pkg3.REPLMode.pkgstr("free $pkg2")
+    @test_throws CommandError Pkg3.REPLMode.pkgstr("free $pkg2")
     Pkg3.test("UnregisteredWithProject")
 
     write(joinpath(p2, "Project.toml"), """