feat(platform): add Reinstall helpers to Pacman and Yay

internal/platform/aur_test.go

@@ -70,6 +70,32 @@ func TestAUREnsureInstalledBootstrapsYay(t *testing.T) {
 	}
 }
 
+func TestYayReinstall(t *testing.T) {
+	r := &aurFakeRunner{yayInstalled: true}
+	y := NewYay(r)
+	if err := y.Reinstall(context.Background(), []string{"git", "curl"}); err != nil {
+		t.Fatal(err)
+	}
+	if len(r.runCalls) == 0 {
+		t.Fatal("expected yay reinstall call")
+	}
+	c := r.runCalls[len(r.runCalls)-1]
+	want := []string{"yay", "-S", "--noconfirm", "git", "curl"}
+	if len(c) != len(want) {
+		t.Fatalf("call = %v, want %v", c, want)
+	}
+	for i, w := range want {
+		if c[i] != w {
+			t.Fatalf("call = %v, want %v", c, want)
+		}
+	}
+	for _, a := range c {
+		if a == "--needed" {
+			t.Fatalf("Reinstall must not pass --needed; got %v", c)
+		}
+	}
+}
+
 func TestAURInstall(t *testing.T) {
 	r := &aurFakeRunner{yayInstalled: true}
 	y := NewYay(r)