Precompile Pkg.activate() (#3540)

Co-authored-by: Ian Butterworth <[email protected]>

Author: mkitti

src/precompile.jl

@@ -93,6 +93,29 @@ function pkg_precompile()
                     Pkg.REPLMode.try_prompt_pkg_add(Symbol[:notapackage])
                     Pkg.update(; update_registry=false)
                     Pkg.status()
+                    pkgs_path = pkgdir(Pkg, "test", "test_packages")
+                    # Precompile a diverse set of test packages
+                    # Check all test packages occasionally if anything has been missed
+                    # test_packages = readdir(pkgs_path)
+                    test_packages = (
+                        "ActiveProjectInTestSubgraph",
+                        "BasicSandbox",
+                        "DependsOnExample",
+                        "PackageWithDependency",
+                        "SameNameDifferentUUID",
+                        "SimplePackage",
+                        "BasicCompat",
+                        "PackageWithDependency",
+                        "SameNameDifferentUUID",
+                        "SimplePackage",
+                        joinpath("ExtensionExamples", "HasExtensions.jl")
+                    )
+                    for test_package in test_packages
+                        Pkg.activate(joinpath(pkgs_path, test_package))
+                    end
+                    Pkg.activate(; temp=true)
+                    Pkg.activate()
+                    Pkg.activate("TestPkg.jl")
                 end
                 Pkg.precompile()
                 try Base.rm(tmp; recursive=true)