cmd/api: ignore internal packages

We might want to add a go/build.IsInternal(pkg string) bool
later, but this works for now.

LGTM=dave, rsc
R=rsc, dave
CC=golang-codereviews
https://golang.org/cl/113300044

1 files changed, 20 insertions, 0 deletions

diff --git a/src/cmd/api/goapi_test.go b/src/cmd/api/goapi_test.go
index b909c32b34..cb68769c8f 100644
--- a/src/cmd/api/goapi_test.go
+++ b/src/cmd/api/goapi_test.go
@@ -142,6 +142,26 @@ func TestCompareAPI(t *testing.T) {
 	}
 }
 
+func TestSkipInternal(t *testing.T) {
+	tests := []struct {
+		pkg  string
+		want bool
+	}{
+		{"net/http", true},
+		{"net/http/internal-foo", true},
+		{"net/http/internal", false},
+		{"net/http/internal/bar", false},
+		{"internal/foo", false},
+		{"internal", false},
+	}
+	for _, tt := range tests {
+		got := !internalPkg.MatchString(tt.pkg)
+		if got != tt.want {
+			t.Errorf("%s is internal = %v; want %v", tt.pkg, got, tt.want)
+		}
+	}
+}
+
 func BenchmarkAll(b *testing.B) {
 	stds, err := exec.Command("go", "list", "std").Output()
 	if err != nil {