add a global cache to the toml parsing in loading and propagate that to precompile processes

base/sysimg.jl

@@ -110,6 +110,8 @@ let
     empty!(DEPOT_PATH)
 end
 
+empty!(Base.TOML_CACHE.d)
+Base.TOML.reinit!(Base.TOML_CACHE.p, "")
 @eval Sys begin
     BINDIR = ""
     STDLIB = ""

base/toml_parser.jl

@@ -102,7 +102,7 @@ function Parser(str::String; filepath=nothing)
             IdSet{TOMLDict}(),    # defined_tables
             root,
             filepath,
-            get(Base.loaded_modules, DATES_PKGID, nothing),
+            isdefined(Base, :loaded_modules) ? get(Base.loaded_modules, DATES_PKGID, nothing) : nothing,
         )
     startup(l)
     return l

stdlib/Profile/src/Profile.jl

@@ -271,7 +271,7 @@ function short_path(spath::Symbol, filenamecache::Dict{Symbol, String})
                     for proj in Base.project_names
                         project_file = joinpath(root, proj)
                         if Base.isfile_casesensitive(project_file)
-                            pkgid = Base.project_file_name_uuid(project_file, "", Base.TOMLCache())
+                            pkgid = Base.project_file_name_uuid(project_file, "")
                             isempty(pkgid.name) && return path # bad Project file
                             # return the joined the module name prefix and path suffix
                             path = path[nextind(path, sizeof(root)):end]

stdlib/REPL/src/REPLCompletions.jl

@@ -583,15 +583,16 @@ end
 
 function project_deps_get_completion_candidates(pkgstarts::String, project_file::String)
     loading_candidates = String[]
-    p = Base.TOML.Parser()
-    Base.TOML.reinit!(p, read(project_file, String); filepath=project_file)
-    d = Base.TOML.parse(p)
-    pkg = get(d, "name", nothing)
+    d = Base.parsed_toml(project_file)
+    pkg = get(d, "name", nothing)::Union{String, Nothing}
     if pkg !== nothing && startswith(pkg, pkgstarts)
         push!(loading_candidates, pkg)
     end
-    for (pkg, _) in get(d, "deps", [])
-        startswith(pkg, pkgstarts) && push!(loading_candidates, pkg)
+    deps = get(d, "deps", nothing)::Union{Dict{String, Any}, Nothing}
+    if deps !== nothing
+        for (pkg, _) in deps
+            startswith(pkg, pkgstarts) && push!(loading_candidates, pkg)
+        end
     end
     return Completion[PackageCompletion(name) for name in loading_candidates]
 end

test/loading.jl

@@ -176,10 +176,9 @@ end
                 d = findfirst(line -> line == "[deps]", p)
                 t = findfirst(line -> startswith(line, "This"), p)
                 # look up various packages by name
-                cache = Base.TOMLCache()
-                root = Base.explicit_project_deps_get(project_file, "Root", cache)
-                this = Base.explicit_project_deps_get(project_file, "This", cache)
-                that = Base.explicit_project_deps_get(project_file, "That", cache)
+                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 == (something(n, N+1) ≥ something(d, N+1) ? nothing :
                                something(u, N+1) < something(d, N+1) ? root_uuid : proj_uuid)
@@ -205,13 +204,13 @@ Base.ACTIVE_PROJECT[] = nothing
 
 # locate `tail(names)` package by following the search path graph through `names` starting from `where`
 function recurse_package(where::PkgId, name::String, names::String...)
-    pkg = identify_package(where, name, Base.TOMLCache())
+    pkg = identify_package(where, name)
     pkg === nothing && return nothing
     return recurse_package(pkg, names...)
 end
 
 recurse_package(pkg::String) = identify_package(pkg)
-recurse_package(where::PkgId, pkg::String) = identify_package(where, pkg, Base.TOMLCache())
+recurse_package(where::PkgId, pkg::String) = identify_package(where, pkg)
 
 function recurse_package(name::String, names::String...)
     pkg = identify_package(name)

test/precompile.jl

@@ -244,7 +244,7 @@ try
     # use _require_from_serialized to ensure that the test fails if
     # the module doesn't reload from the image:
     @test_logs (:warn, "Replacing module `$Foo_module`") begin
-        ms = Base._require_from_serialized(cachefile, Base.TOMLCache())
+        ms = Base._require_from_serialized(cachefile)
         @test isa(ms, Array{Any,1})
     end
 
@@ -417,7 +417,7 @@ try
           """)
 
     cachefile = Base.compilecache(Base.PkgId("FooBar"))
-    @test cachefile == Base.compilecache_path(Base.PkgId("FooBar"), Base.TOMLCache())
+    @test cachefile == Base.compilecache_path(Base.PkgId("FooBar"))
     @test isfile(joinpath(cachedir, "FooBar.ji"))
     @test Base.stale_cachefile(FooBar_file, joinpath(cachedir, "FooBar.ji")) isa Vector
     @test !isdefined(Main, :FooBar)