use per repository tags

Author: vladak

opengrok-indexer/src/test/java/org/opengrok/indexer/history/FileHistoryCacheTest.java

@@ -248,12 +248,17 @@ void testStoreAndGetNotRenamed() throws Exception {
     @EnabledForRepository(MERCURIAL)
     @Test
     void testStoreAndGetIncrementalTags() throws Exception {
-        // Enable tagging of history entries.
-        env.setTagsEnabled(true);
-
         File reposRoot = new File(repositories.getSourceRoot(), "mercurial");
+        assertTrue(reposRoot.exists());
+
         Repository repo = RepositoryFactory.getRepository(reposRoot);
+        assertNotNull(repo);
+
+        // Enable tagging of history entries.
+        repo.setTagsEnabled(true);
+
         History historyToStore = repo.getHistory(reposRoot);
+        assertNotNull(historyToStore);
 
         // Store the history.
         cache.store(historyToStore, repo);
@@ -426,13 +431,13 @@ void testRenameFileThenDoIncrementalReindex() throws Exception {
         // The test expects support for renamed files.
         env.setHandleHistoryOfRenamedFiles(true);
 
+        Repository repo = RepositoryFactory.getRepository(reposRoot);
+        assertNotNull(repo);
+
         // Use tags for better coverage.
-        env.setTagsEnabled(true);
+        repo.setTagsEnabled(true);
 
         // Generate history index.
-        // It is necessary to call getRepository() only after tags were enabled
-        // to produce list of tags.
-        Repository repo = RepositoryFactory.getRepository(reposRoot);
         History historyToStore = repo.getHistory(reposRoot);
         cache.store(historyToStore, repo);
 
@@ -539,14 +544,9 @@ void testRenameFileThenDoIncrementalReindex() throws Exception {
     @Test
     void testRenamedFilePlusChangesBranched() throws Exception {
         File reposRoot = new File(repositories.getSourceRoot(), "mercurial");
+        assertTrue(reposRoot.exists());
         History updatedHistory;
 
-        // The test expects support for renamed files.
-        env.setHandleHistoryOfRenamedFiles(true);
-
-        // Use tags for better coverage.
-        env.setTagsEnabled(true);
-
         // Branch the repo and add one changeset.
         runHgCommand(reposRoot, "unbundle",
             Paths.get(getClass().getResource("/history/hg-branch.bundle").toURI()).toString());
@@ -558,10 +558,16 @@ void testRenamedFilePlusChangesBranched() throws Exception {
         // Switch to the newly created branch.
         runHgCommand(reposRoot, "update", "mybranch");
 
-        // Generate history index.
-        // It is necessary to call getRepository() only after tags were enabled
-        // to produce list of tags.
         Repository repo = RepositoryFactory.getRepository(reposRoot);
+        assertNotNull(repo);
+
+        // The test expects support for renamed files.
+        repo.setHandleRenamedFiles(true);
+
+        // Use tags for better coverage.
+        repo.setTagsEnabled(true);
+
+        // Generate history index.
         History historyToStore = repo.getHistory(reposRoot);
         cache.store(historyToStore, repo);