loading: fix two bugs in project file deps parsing + tests

base/loading.jl

@@ -479,13 +479,8 @@ end
 
 # find project file root or deps `name => uuid` mapping
 #  - `false` means: did not find `name`
-#  - `true` means: found `name` without UUID
+#  - `true` means: found `name` without UUID (can't happen in explicit projects)
 #  - `uuid` means: found `name` with `uuid` in project file
-#
-# `true` can only be returned in the case that `name` is the project's name
-# and the project file does not have a top-level `uuid` mapping
-# it is not currently supported to have a name in `deps` mapped to anything
-# besides a UUID, so otherwise the answer is `false` or a UUID value
 
 function explicit_project_deps_get(project_file::String, name::String)::Union{Bool,UUID}
     open(project_file) do io
@@ -507,10 +502,10 @@ function explicit_project_deps_get(project_file::String, name::String)::Union{Bo
                     m.captures[1] == name && return UUID(m.captures[2])
                 end
             elseif occursin(re_section, line)
-                state = :deps
+                state = occursin(re_section_deps, line) ? :deps : :other
             end
         end
-        return false
+        return root_name == name && root_uuid
     end
 end
 

stdlib/Pkg3/src/precompile.jl

@@ -781,7 +781,6 @@ precompile(Tuple{typeof(REPL.LineEdit.fixup_keymaps!), Base.Dict{Char, Any}, Int
 precompile(Tuple{typeof(REPL.LineEdit.region_active), REPL.LineEdit.PromptState})
 precompile(Tuple{typeof(REPL.LineEdit.setup_prefix_keymap), REPL.REPLHistoryProvider, REPL.LineEdit.Prompt})
 precompile(Tuple{typeof(REPL.LineEdit.setup_search_keymap), REPL.REPLHistoryProvider})
-precompile(Tuple{getfield(Pkg3.Types, Symbol("##printpkgstyle#56")), Bool, typeof(Pkg3.Types.printpkgstyle), Base.TTY, Symbol, String})
 
 precompile(Tuple{typeof(REPL.LineEdit.complete_line), Pkg3.REPLMode.PkgCompletionProvider, REPL.LineEdit.PromptState})
 

test/loading.jl

@@ -79,11 +79,69 @@ mktempdir() do dir
     end
 end
 
+## unit tests of project parsing ##
+
 import Base: SHA1, PkgId, load_path, identify_package, locate_package, version_slug, dummy_uuid
 import UUIDs: UUID, uuid4, uuid_version
 import Random: shuffle, randstring
 using Test
 
+function subset(v::Vector{T}, m::Int) where T
+    T[v[j] for j = 1:length(v) if ((m >>> (j - 1)) & 1) == 1]
+end
+
+function perm(p::Vector, i::Int)
+    for j = length(p):-1:1
+        i, k = divrem(i, j)
+        p[j], p[k+1] = p[k+1], p[j]
+    end
+    return p
+end
+
+@testset "explicit_project_deps_get" begin
+    project_file = "$(tempname()).toml"
+    touch(project_file) # dummy_uuid calls realpath
+    proj_uuid = dummy_uuid(project_file)
+    root_uuid = UUID("43306aae-ef21-43f3-9517-81724f2885ac")
+    this_uuid = UUID("b36283d3-af40-4a18-9ee0-d12ee9c142ac")
+    lines = split("""
+    name = "Root"
+    uuid = "$root_uuid"
+    [deps]
+    This = "$this_uuid"
+    """, '\n')
+    N = length(lines)
+    for m = 0:2^N-1
+        # for every subset of lines
+        s = subset(lines, m)
+        for i = 1:factorial(count_ones(m))
+            # for every permutation of that subset
+            p = perm(s, i)
+            open(project_file, write=true) do io
+                for line in p
+                    println(io, line)
+                end
+            end
+            # look at lines and their order
+            n = findfirst(line -> startswith(line, "name"), p)
+            u = findfirst(line -> startswith(line, "uuid"), p)
+            d = findfirst(line -> line == "[deps]", p)
+            t = findfirst(line -> startswith(line, "This"), p)
+            # look up various packages by name
+            root = Base.explicit_project_deps_get(project_file, "Root")
+            this = Base.explicit_project_deps_get(project_file, "This")
+            that = Base.explicit_project_deps_get(project_file, "That")
+            # test that the correct answers are given
+            @test root == (coalesce(n, N+1) ≥ coalesce(d, N+1) ? false :
+                           coalesce(u, N+1) < coalesce(d, N+1) ? root_uuid : proj_uuid)
+            @test this == (coalesce(d, N+1) < coalesce(t, N+1) ≤ N ? this_uuid : false)
+            @test that == false
+        end
+    end
+end
+
+## functional testing of package identification, location & loading ##
+
 saved_load_path = copy(LOAD_PATH)
 saved_depot_path = copy(DEPOT_PATH)
 push!(empty!(LOAD_PATH), "project")
@@ -415,14 +473,14 @@ function test_find(
     end
 end
 
-@testset "identify_package with one env in load path" begin
+@testset "find_package with one env in load path" begin
     for (env, (_, _, roots, graph, paths)) in envs
         push!(empty!(LOAD_PATH), env)
         test_find(roots, graph, paths)
     end
 end
 
-@testset "identify_package with two envs in load path" begin
+@testset "find_package with two envs in load path" begin
     for x = false:true,
         (env1, (_, _, roots1, graph1, paths1)) in (x ? envs : rand(envs, 10)),
         (env2, (_, _, roots2, graph2, paths2)) in (x ? rand(envs, 10) : envs)
@@ -434,7 +492,7 @@ end
     end
 end
 
-@testset "identify_package with three envs in load path" begin
+@testset "find_package with three envs in load path" begin
     for (env1, (_, _, roots1, graph1, paths1)) in rand(envs, 10),
         (env2, (_, _, roots2, graph2, paths2)) in rand(envs, 10),
         (env3, (_, _, roots3, graph3, paths3)) in rand(envs, 10)