Install shared reporting flags

internal/commandmeta/metadata_test.go

@@ -0,0 +1,28 @@
+package commandmeta
+
+import "testing"
+
+func TestReportingFlagsAreBooleanAndReturnedIndependently(t *testing.T) {
+	flags := ReportingFlags()
+	want := []string{"quiet", "verbose", "debug", "progress"}
+	if len(flags) != len(want) {
+		t.Fatalf("reporting flags = %#v", flags)
+	}
+	for index, name := range want {
+		if flags[index].Name != name || !flags[index].Boolean || flags[index].Short != "" || flags[index].Default != "false" {
+			t.Errorf("reporting flag %d = %#v", index, flags[index])
+		}
+		if !IsReportingFlag(name) {
+			t.Errorf("%q is not recognized as a reporting flag", name)
+		}
+	}
+	flags[0].Name = "changed"
+	if ReportingFlags()[0].Name != "quiet" {
+		t.Fatal("caller mutation changed shared reporting metadata")
+	}
+	for _, name := range []string{"help", "quietly", ""} {
+		if IsReportingFlag(name) {
+			t.Errorf("%q was incorrectly recognized as a reporting flag", name)
+		}
+	}
+}