cmd/go: drop PackageInternal.Fake

The point of this code is to print a warning about repeated go test
invocations rebuilding the same packages over and over.
The new cache will eliminate this failure mode and with it
the need for the warning and this field.

Change-Id: Ied79b3ca67d51a61f44629de6ae4974e6c8dd5a9
Reviewed-on: https://go-review.googlesource.com/56282Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/cmd/go/internal/load/pkg.go

@@ -99,7 +99,6 @@ type PackageInternal struct {
 	AllGoFiles   []string             // gofiles + IgnoredGoFiles, absolute paths
 	Target       string               // installed file for this package (may be executable)
 	Pkgfile      string               // where package will be (or is already) built or installed
-	Fake         bool                 // synthesized package
 	ForceLibrary bool                 // this package is a library (even if named "main")
 	Cmdline      bool                 // defined by files listed on command line
 	Local        bool                 // imported via local path (./ or ../)

src/cmd/go/internal/test/test.go

@@ -566,7 +566,6 @@ func runTest(cmd *base.Command, args []string) {
 			}
 			p.Stale = true // rebuild
 			p.StaleReason = "rebuild for coverage"
-			p.Internal.Fake = true // do not warn about rebuild
 			p.Internal.CoverMode = testCoverMode
 			var coverFiles []string
 			coverFiles = append(coverFiles, p.GoFiles...)
@@ -627,50 +626,6 @@ func runTest(cmd *base.Command, args []string) {
 		}
 	}
 
-	// If we are building any out-of-date packages other
-	// than those under test, warn.
-	okBuild := map[*load.Package]bool{}
-	for _, p := range pkgs {
-		okBuild[p] = true
-	}
-	warned := false
-	for _, a := range work.ActionList(root) {
-		if a.Package == nil || okBuild[a.Package] {
-			continue
-		}
-		okBuild[a.Package] = true // warn at most once
-
-		// Don't warn about packages being rebuilt because of
-		// things like coverage analysis.
-		for _, p1 := range a.Package.Internal.Imports {
-			if p1.Internal.Fake {
-				a.Package.Internal.Fake = true
-			}
-		}
-
-		if a.Func != nil && !okBuild[a.Package] && !a.Package.Internal.Fake && !a.Package.Internal.Local {
-			if !warned {
-				fmt.Fprintf(os.Stderr, "warning: building out-of-date packages:\n")
-				warned = true
-			}
-			fmt.Fprintf(os.Stderr, "\t%s\n", a.Package.ImportPath)
-		}
-	}
-	if warned {
-		args := strings.Join(pkgArgs, " ")
-		if args != "" {
-			args = " " + args
-		}
-		extraOpts := ""
-		if cfg.BuildRace {
-			extraOpts = "-race "
-		}
-		if cfg.BuildMSan {
-			extraOpts = "-msan "
-		}
-		fmt.Fprintf(os.Stderr, "installing these packages with 'go test %s-i%s' will speed future tests.\n\n", extraOpts, args)
-	}
-
 	b.Do(root)
 }
 
@@ -789,7 +744,6 @@ func builderTest(b *work.Builder, p *load.Package) (buildAction, runAction, prin
 		ptest.Internal.Target = ""
 		ptest.Imports = str.StringList(p.Imports, p.TestImports)
 		ptest.Internal.Imports = append(append([]*load.Package{}, p.Internal.Imports...), imports...)
-		ptest.Internal.Fake = true
 		ptest.Internal.ForceLibrary = true
 		ptest.Stale = true
 		ptest.StaleReason = "rebuild for test"
@@ -833,7 +787,6 @@ func builderTest(b *work.Builder, p *load.Package) (buildAction, runAction, prin
 					ImportPos: p.Internal.Build.XTestImportPos,
 				},
 				Imports: ximports,
-				Fake:    true,
 			},
 		}
 		if pxtestNeedsPtest {
@@ -858,7 +811,6 @@ func builderTest(b *work.Builder, p *load.Package) (buildAction, runAction, prin
 		},
 		Internal: load.PackageInternal{
 			Build:     &build.Package{Name: "main"},
-			Fake:      true,
 			OmitDebug: !testC && !testNeedBinary,
 		},
 	}
@@ -1078,7 +1030,6 @@ func recompileForTest(pmain, preal, ptest *load.Package) {
 			copy(p1.Internal.Imports, p.Internal.Imports)
 			p = p1
 			p.Internal.Target = ""
-			p.Internal.Fake = true
 			p.Stale = true
 			p.StaleReason = "depends on package being tested"
 		}