Dissolve gerrit-pgm top-level directory

Change-Id: Ia03015b91da3df4a8672bc30f13b3e3f048a628c

java/com/google/gerrit/pgm/Cat.java

@@ -0,0 +1,63 @@
+// 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;
+
+import com.google.gerrit.launcher.GerritLauncher;
+import com.google.gerrit.pgm.util.AbstractProgram;
+import java.io.IOException;
+import java.io.InputStream;
+import org.kohsuke.args4j.Argument;
+
+/** Dump the contents of a file in our archive. */
+public class Cat extends AbstractProgram {
+  @Argument(index = 0, required = true, metaVar = "FILE", usage = "file to output")
+  private String fileName;
+
+  @Override
+  public int run() throws IOException {
+    while (fileName.startsWith("/")) {
+      fileName = fileName.substring(1);
+    }
+
+    String name;
+    if (fileName.equals("LICENSES.txt")) {
+      name = fileName;
+    } else {
+      name = "WEB-INF/" + fileName;
+    }
+
+    try (InputStream in = open(name)) {
+      if (in == null) {
+        System.err.println("error: no such file " + fileName);
+        return 1;
+      }
+
+      try {
+        final byte[] buf = new byte[4096];
+        int n;
+        while ((n = in.read(buf)) >= 0) {
+          System.out.write(buf, 0, n);
+        }
+      } finally {
+        System.out.flush();
+      }
+    }
+    return 0;
+  }
+
+  private InputStream open(String name) {
+    return GerritLauncher.class.getClassLoader().getResourceAsStream(name);
+  }
+}