1 files changed, 92 insertions, 0 deletions
diff --git a/java/com/google/gerrit/pgm/init/InitCache.java b/java/com/google/gerrit/pgm/init/InitCache.java
new file mode 100644
index 0000000000..30627d5dc4
--- /dev/null
+++ b/java/com/google/gerrit/pgm/init/InitCache.java
@@ -0,0 +1,92 @@
+// Copyright (C) 2009 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.pgm.init;
+
+import com.google.gerrit.common.FileUtil;
+import com.google.gerrit.pgm.init.api.ConsoleUI;
+import com.google.gerrit.pgm.init.api.InitFlags;
+import com.google.gerrit.pgm.init.api.InitStep;
+import com.google.gerrit.pgm.init.api.Section;
+import com.google.gerrit.server.config.SitePaths;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import java.io.IOException;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+
+/** Initialize the {@code cache} configuration section. */
+@Singleton
+class InitCache implements InitStep {
+  private final ConsoleUI ui;
+  private final InitFlags flags;
+  private final SitePaths site;
+  private final Section cache;
+
+  @Inject
+  InitCache(
+      final ConsoleUI ui,
+      final InitFlags flags,
+      final SitePaths site,
+      final Section.Factory sections) {
+    this.ui = ui;
+    this.flags = flags;
+    this.site = site;
+    this.cache = sections.get("cache", null);
+  }
+
+  @Override
+  public void run() {
+    ui.header("Cache");
+    String path = cache.get("directory");
+
+    if (path != null && path.isEmpty()) {
+      // Explicitly set to empty implies the administrator has
+      // disabled the on disk cache and doesn't want it enabled.
+      //
+      return;
+    }
+
+    if (path == null) {
+      path = "cache";
+      cache.set("directory", path);
+    }
+
+    Path loc = site.resolve(path);
+    FileUtil.mkdirsOrDie(loc, "cannot create cache.directory");
+    List<Path> cacheFiles = new ArrayList<>();
+    try (DirectoryStream<Path> stream = Files.newDirectoryStream(loc, "*.{lock,h2,trace}.db")) {
+      for (Path entry : stream) {
+        cacheFiles.add(entry);
+      }
+    } catch (IOException e) {
+      ui.message("IO error during cache directory scan");
+      return;
+    }
+    if (!cacheFiles.isEmpty()) {
+      for (Path entry : cacheFiles) {
+        if (flags.deleteCaches || ui.yesno(false, "Delete cache file %s", entry)) {
+          try {
+            Files.deleteIfExists(entry);
+          } catch (IOException e) {
+            ui.message("Could not delete " + entry);
+          }
+        }
+      }
+    }
+  }
+}