Uses CVS/Entries to determine the revision of a checked out file.

gc/boehm/leaksoup/RevisionTable.java

@@ -0,0 +1,75 @@
+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (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.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is Mozilla Communicator client code, released
+ * March 31, 1998.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Patrick C. Beard <beard@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU Public License (the "GPL"), in which case the
+ * provisions of the GPL are applicable instead of those above.
+ * If you wish to allow use of your version of this file only
+ * under the terms of the GPL and not to allow others to use your
+ * version of this file under the NPL, indicate your decision by
+ * deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL.  If you do not delete
+ * the provisions above, a recipient may use your version of this
+ * file under either the NPL or the GPL.
+ */
+
+import java.io.*;
+import java.util.*;
+
+/**
+ * Provides a way to map from a file path to its CVS revision number.
+ */
+public class RevisionTable {
+	private Hashtable revisions = new Hashtable();
+
+	public String getRevision(String path) throws IOException {
+		String revision = (String) revisions.get(path);
+		if (revision == null) {
+			int lastSlash = path.lastIndexOf('/');
+			String dirPath = path.substring(0, lastSlash + 1);
+			readEntries(dirPath);
+			revision = (String) revisions.get(path);
+		}
+		return revision;
+	}
+	
+	/**
+	 * Reads all of the entries from a CVS Entries file, and populates
+	 * the hashtable with the revisions, keyed by file paths.
+	 */
+	private void readEntries(String dirPath) throws IOException {
+		String entriesPath = dirPath + "CVS/Entries";
+		BufferedReader entries = new BufferedReader(new InputStreamReader(new FileInputStream(entriesPath)));
+		for (String line = entries.readLine(); line != null; line = entries.readLine()) {
+			if (line.charAt(0) == '/') {
+				int secondSlash = line.indexOf('/', 1);
+				String fileName = line.substring(1, secondSlash);
+				int thirdSlash = line.indexOf('/', secondSlash + 1);
+				String revision = line.substring(secondSlash + 1, thirdSlash);
+				revisions.put(dirPath + fileName, revision);
+			}
+		}
+		entries.close();
+	}
+}