internal/pkg: pass impure job count

This is cleaner than checking cpu count during cure, it is impossible to avoid impurity in both situations but this is configurable.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pkg/pkg_test.go

@@ -35,7 +35,7 @@ import (
 func unsafeOpen(
 	ctx context.Context,
 	msg message.Msg,
-	flags, cures int,
+	flags, cures, jobs int,
 	base *check.Absolute,
 	lock bool,
 ) (*pkg.Cache, error)
@@ -230,7 +230,7 @@ func TestIdent(t *testing.T) {
 	var cache *pkg.Cache
 	if a, err := check.NewAbs(t.TempDir()); err != nil {
 		t.Fatal(err)
-	} else if cache, err = pkg.Open(t.Context(), msg, 0, 0, a); err != nil {
+	} else if cache, err = pkg.Open(t.Context(), msg, 0, 0, 0, a); err != nil {
 		t.Fatal(err)
 	}
 	t.Cleanup(cache.Close)
@@ -304,7 +304,7 @@ func checkWithCache(t *testing.T, testCases []cacheTestCase) {
 			}
 
 			var scrubFunc func() error // scrub after hashing
-			if c, err := pkg.Open(t.Context(), msg, flags, 1<<4, base); err != nil {
+			if c, err := pkg.Open(t.Context(), msg, flags, 1<<4, 0, base); err != nil {
 				t.Fatalf("Open: error = %v", err)
 			} else {
 				t.Cleanup(c.Close)
@@ -606,7 +606,7 @@ func TestCache(t *testing.T) {
 			if c0, err := unsafeOpen(
 				t.Context(),
 				message.New(nil),
-				0, 0, base, false,
+				0, 0, 0, base, false,
 			); err != nil {
 				t.Fatalf("open: error = %v", err)
 			} else {
@@ -1263,7 +1263,7 @@ func TestNew(t *testing.T) {
 		if _, err := pkg.Open(
 			t.Context(),
 			message.New(nil),
-			0, 0, check.MustAbs(container.Nonexistent),
+			0, 0, 0, check.MustAbs(container.Nonexistent),
 		); !reflect.DeepEqual(err, wantErr) {
 			t.Errorf("Open: error = %#v, want %#v", err, wantErr)
 		}
@@ -1291,7 +1291,7 @@ func TestNew(t *testing.T) {
 		if _, err := pkg.Open(
 			t.Context(),
 			message.New(nil),
-			0, 0, tempDir.Append("cache"),
+			0, 0, 0, tempDir.Append("cache"),
 		); !reflect.DeepEqual(err, wantErr) {
 			t.Errorf("Open: error = %#v, want %#v", err, wantErr)
 		}