archive: Include entries for directories

Entries for directories are optional and mostly wasted space in most
archive formats (except as a place to hang ownership and filesystem
permissions), but "git archive" includes them.  Follow suit.

This will make it easier in a later change to include empty
directories as placeholders for missing submodules.

Change-Id: I1810c686bcc9eb4d73498e4d3e763e18787b088a
Signed-off-by: Jonathan Nieder <jrn@google.com>

3 files changed, 103 insertions, 6 deletions

diff --git a/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/TarFormat.java b/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/TarFormat.java
index 23f4beda14..7e1c9cc907 100644
--- a/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/TarFormat.java
+++ b/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/TarFormat.java
@@ -47,12 +47,14 @@ import java.io.OutputStream;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.text.MessageFormat;
 
 import org.apache.commons.compress.archivers.ArchiveOutputStream;
 import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
 import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
 import org.apache.commons.compress.archivers.tar.TarConstants;
 import org.eclipse.jgit.api.ArchiveCommand;
+import org.eclipse.jgit.archive.internal.ArchiveText;
 import org.eclipse.jgit.lib.FileMode;
 import org.eclipse.jgit.lib.ObjectLoader;
 
@@ -83,13 +85,29 @@ public class TarFormat implements ArchiveCommand.Format<ArchiveOutputStream> {
 			return;
 		}
 
+		// TarArchiveEntry detects directories by checking
+		// for '/' at the end of the filename.
+		if (path.endsWith("/") && mode != FileMode.TREE)
+			throw new IllegalArgumentException(MessageFormat.format(
+					ArchiveText.get().pathDoesNotMatchMode, path, mode));
+		if (!path.endsWith("/") && mode == FileMode.TREE)
+			path = path + "/";
+
 		final TarArchiveEntry entry = new TarArchiveEntry(path);
-		if (mode == FileMode.REGULAR_FILE ||
-		    mode == FileMode.EXECUTABLE_FILE) {
+		if (mode == FileMode.TREE) {
+			out.putArchiveEntry(entry);
+			out.closeArchiveEntry();
+			return;
+		}
+
+		if (mode == FileMode.REGULAR_FILE) {
+			// ok
+		} else if (mode == FileMode.EXECUTABLE_FILE) {
 			entry.setMode(mode.getBits());
 		} else {
-			// TODO(jrn): Let the caller know the tree contained
-			// an entry with unsupported mode (e.g., a submodule).
+			// Unsupported mode (e.g., GITLINK).
+			throw new IllegalArgumentException(MessageFormat.format(
+					ArchiveText.get().unsupportedMode, mode));
 		}
 		entry.setSize(loader.getSize());
 		out.putArchiveEntry(entry);
diff --git a/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/ZipFormat.java b/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/ZipFormat.java
index 00c962bc98..1a3765ec19 100644
--- a/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/ZipFormat.java
+++ b/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/ZipFormat.java
@@ -44,6 +44,7 @@ package org.eclipse.jgit.archive;
 
 import java.io.IOException;
 import java.io.OutputStream;
+import java.text.MessageFormat;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
@@ -52,6 +53,7 @@ import org.apache.commons.compress.archivers.ArchiveOutputStream;
 import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
 import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;
 import org.eclipse.jgit.api.ArchiveCommand;
+import org.eclipse.jgit.archive.internal.ArchiveText;
 import org.eclipse.jgit.lib.FileMode;
 import org.eclipse.jgit.lib.ObjectLoader;
 
@@ -69,7 +71,20 @@ public class ZipFormat implements ArchiveCommand.Format<ArchiveOutputStream> {
 	public void putEntry(ArchiveOutputStream out,
 			String path, FileMode mode, ObjectLoader loader)
 			throws IOException {
+		// ZipArchiveEntry detects directories by checking
+		// for '/' at the end of the filename.
+		if (path.endsWith("/") && mode != FileMode.TREE)
+			throw new IllegalArgumentException(MessageFormat.format(
+					ArchiveText.get().pathDoesNotMatchMode, path, mode));
+		if (!path.endsWith("/") && mode == FileMode.TREE)
+			path = path + "/";
+
 		final ZipArchiveEntry entry = new ZipArchiveEntry(path);
+		if (mode == FileMode.TREE) {
+			out.putArchiveEntry(entry);
+			out.closeArchiveEntry();
+			return;
+		}
 
 		if (mode == FileMode.REGULAR_FILE) {
 			// ok
@@ -77,8 +92,9 @@ public class ZipFormat implements ArchiveCommand.Format<ArchiveOutputStream> {
 				|| mode == FileMode.SYMLINK) {
 			entry.setUnixMode(mode.getBits());
 		} else {
-			// TODO(jrn): Let the caller know the tree contained
-			// an entry with unsupported mode (e.g., a submodule).
+			// Unsupported mode (e.g., GITLINK).
+			throw new IllegalArgumentException(MessageFormat.format(
+					ArchiveText.get().unsupportedMode, mode));
 		}
 		entry.setSize(loader.getSize());
 		out.putArchiveEntry(entry);
diff --git a/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/internal/ArchiveText.java b/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/internal/ArchiveText.java
new file mode 100644
index 0000000000..edadf1c81d
--- /dev/null
+++ b/org.eclipse.jgit.archive/src/org/eclipse/jgit/archive/internal/ArchiveText.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2013, Google Inc.
+ * and other copyright owners as documented in the project's IP log.
+ *
+ * This program and the accompanying materials are made available
+ * under the terms of the Eclipse Distribution License v1.0 which
+ * accompanies this distribution, is reproduced below, and is
+ * available at http://www.eclipse.org/org/documents/edl-v10.php
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials provided
+ *   with the distribution.
+ *
+ * - Neither the name of the Eclipse Foundation, Inc. nor the
+ *   names of its contributors may be used to endorse or promote
+ *   products derived from this software without specific prior
+ *   written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.eclipse.jgit.archive.internal;
+
+import org.eclipse.jgit.nls.NLS;
+import org.eclipse.jgit.nls.TranslationBundle;
+
+/**
+ * Translation bundle for archivers
+ */
+public class ArchiveText extends TranslationBundle {
+	/**
+	 * @return an instance of this translation bundle
+	 */
+	public static ArchiveText get() {
+		return NLS.getBundleFor(ArchiveText.class);
+	}
+
+	// @formatter:off
+	/***/ public String pathDoesNotMatchMode;
+	/***/ public String unsupportedMode;
+}