Allow explicit publication stores in Git metadata

internal/publish/record_test.go

@@ -142,6 +142,36 @@ func TestSaveEvidenceResolvesRelativeAndIgnoredOverrides(t *testing.T) {
 	}
 }
 
+func TestSaveEvidenceAllowsExplicitGitMetadataStores(t *testing.T) {
+	for _, layout := range []string{"ordinary", "linked", "separate"} {
+		t.Run(layout, func(t *testing.T) {
+			repo := recordRepo(t)
+			switch layout {
+			case "linked":
+				linked := filepath.Join(t.TempDir(), "linked")
+				recordGit(t, repo, "worktree", "add", "--detach", linked)
+				repo = linked
+			case "separate":
+				recordGit(t, repo, "init", "--separate-git-dir", filepath.Join(t.TempDir(), "metadata"))
+			}
+			defaultPath, err := SaveEvidence(repo, "", Evidence{})
+			if err != nil {
+				t.Fatal(err)
+			}
+			privateDir := strings.TrimSuffix(recordGit(t, repo, "rev-parse", "--absolute-git-dir"), "\n")
+			for _, directory := range []string{filepath.Dir(defaultPath), filepath.Join(privateDir, "other-private-records")} {
+				path, err := SaveEvidence(repo, directory, Evidence{Tag: "v1.2.3"})
+				if err != nil || filepath.Dir(path) != directory {
+					t.Fatalf("explicit metadata store %q = %q, %v", directory, path, err)
+				}
+			}
+			if status := recordGit(t, repo, "status", "--porcelain"); status != "" {
+				t.Fatalf("metadata records appeared in candidate: %s", status)
+			}
+		})
+	}
+}
+
 func TestSaveEvidenceRejectsUnignoredOverrideInsideWorktree(t *testing.T) {
 	repo := recordRepo(t)
 	_, err := SaveEvidence(repo, "records", Evidence{Tag: "v1.2.3"})