cat, ls: move inside our main program package

I've never liked having these be special cases.  Lets move them to
the pgm package where they aren't special anymore.

Change-Id: Ib76fd6c7fe806b92ee5658ece4c788e67bcacdbc
Signed-off-by: Shawn O. Pearce <sop@google.com>

gerrit-main/src/main/java/com/google/gerrit/main/GerritLauncher.java

@@ -69,42 +69,21 @@ public final class GerritLauncher {
       return 1;
     }
 
+    // Special cases, a few global options actually are programs.
+    //
     if ("-v".equals(argv[0]) || "--version".equals(argv[0])) {
-      // Special case, jump into the "Version" command which is
+      argv[0] = "version";
-      // compiled somewhere in our library packages.
+    } else if ("-p".equals(argv[0]) || "--cat".equals(argv[0])) {
-      //
+      argv[0] = "cat";
-      argv[0] = "Version";
+    } else if ("-l".equals(argv[0]) || "--ls".equals(argv[0])) {
+      argv[0] = "ls";
     }
 
-    final String cmd = argv[0];
+    // Run the application class
-    if ("cat".equals(cmd) || "-p".equals(cmd) || "--cat".equals(cmd)) {
+    //
-      // Copy the contents of a file to System.out
+    final ClassLoader cl = libClassLoader();
-      //
+    Thread.currentThread().setContextClassLoader(cl);
-      if (argv.length == 2) {
+    return invokeProgram(cl, argv);
-        return cat(argv[1]);
-      } else {
-        System.err.println("usage: cat FILE");
-        return 1;
-      }
-
-    } else if ("ls".equals(cmd) || "-l".equals(cmd) || "--ls".equals(cmd)) {
-      // List the available files under WEB-INF/
-      //
-      if (argv.length == 1) {
-        ls();
-        return 0;
-      } else {
-        System.err.println("usage: ls");
-        return 1;
-      }
-
-    } else {
-      // Run an arbitrary application class
-      //
-      final ClassLoader cl = libClassLoader();
-      Thread.currentThread().setContextClassLoader(cl);
-      return invokeProgram(cl, argv);
-    }
   }
 
   private static String getVersion(final File me) {
@@ -127,67 +106,6 @@ public final class GerritLauncher {
     }
   }
 
-  private static int cat(String fileName) throws IOException {
-    while (fileName.startsWith("/")) {
-      fileName = fileName.substring(1);
-    }
-
-    String name;
-    if (fileName.equals("LICENSES.txt")) {
-      name = fileName;
-    } else {
-      name = "WEB-INF/" + fileName;
-    }
-
-    final InputStream in = GerritLauncher.class.getResourceAsStream(name);
-    if (in == null) {
-      System.err.println("error: no such file " + fileName);
-      return 1;
-    }
-
-    try {
-      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();
-      }
-    } finally {
-      in.close();
-    }
-    return 0;
-  }
-
-  private static void ls() throws IOException {
-    final ZipFile zf = new ZipFile(getDistributionArchive());
-    try {
-      final Enumeration<? extends ZipEntry> e = zf.entries();
-      while (e.hasMoreElements()) {
-        final ZipEntry ze = e.nextElement();
-        String name = ze.getName();
-        boolean show = false;
-        show |= name.startsWith("WEB-INF/");
-        show |= name.equals("LICENSES.txt");
-
-        show &= !ze.isDirectory();
-        show &= !name.startsWith("WEB-INF/classes/");
-        show &= !name.startsWith("WEB-INF/lib/");
-        show &= !name.equals("WEB-INF/web.xml");
-        if (show) {
-          if (name.startsWith("WEB-INF/")) {
-            name = name.substring("WEB-INF/".length());
-          }
-          System.out.println(name);
-        }
-      }
-    } finally {
-      zf.close();
-    }
-  }
-
   private static int invokeProgram(final ClassLoader loader,
       final String[] origArgv) throws Exception {
     String name = origArgv[0];

gerrit-pgm/src/main/java/com/google/gerrit/pgm/Cat.java

@@ -0,0 +1,68 @@
+// 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.main.GerritLauncher;
+import com.google.gerrit.pgm.util.AbstractProgram;
+
+import org.kohsuke.args4j.Argument;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+/** 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;
+    }
+
+    final InputStream in = open(name);
+    if (in == null) {
+      System.err.println("error: no such file " + fileName);
+      return 1;
+    }
+
+    try {
+      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();
+      }
+    } finally {
+      in.close();
+    }
+    return 0;
+  }
+
+  private InputStream open(String name) {
+    return GerritLauncher.class.getClassLoader().getResourceAsStream(name);
+  }
+}

gerrit-pgm/src/main/java/com/google/gerrit/pgm/Ls.java

@@ -0,0 +1,55 @@
+// 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.main.GerritLauncher;
+import com.google.gerrit.pgm.util.AbstractProgram;
+
+import java.io.IOException;
+import java.util.Enumeration;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+/** List the files available in our archive. */
+public class Ls extends AbstractProgram {
+  @Override
+  public int run() throws IOException {
+    final ZipFile zf = new ZipFile(GerritLauncher.getDistributionArchive());
+    try {
+      final Enumeration<? extends ZipEntry> e = zf.entries();
+      while (e.hasMoreElements()) {
+        final ZipEntry ze = e.nextElement();
+        String name = ze.getName();
+        boolean show = false;
+        show |= name.startsWith("WEB-INF/");
+        show |= name.equals("LICENSES.txt");
+
+        show &= !ze.isDirectory();
+        show &= !name.startsWith("WEB-INF/classes/");
+        show &= !name.startsWith("WEB-INF/lib/");
+        show &= !name.equals("WEB-INF/web.xml");
+        if (show) {
+          if (name.startsWith("WEB-INF/")) {
+            name = name.substring("WEB-INF/".length());
+          }
+          System.out.println(name);
+        }
+      }
+    } finally {
+      zf.close();
+    }
+    return 0;
+  }
+}