# HG changeset patch
# User Artem Tikhomirov <tikhomirov.artem@gmail.com>
# Date 1313427101 -7200
# Node ID a6d19adc2636e5fdfb2153a83b966d73844648f5
# Parent  8c951645bea0869f95beda6c265c8c2f5538e37c
HgRepository.getWorkingCopyBranchName() to retrieve branch associated with working directory

diff -r 8c951645bea0 -r a6d19adc2636 cmdline/org/tmatesoft/hg/console/Main.java
--- a/cmdline/org/tmatesoft/hg/console/Main.java	Fri Aug 12 19:12:04 2011 +0200
+++ b/cmdline/org/tmatesoft/hg/console/Main.java	Mon Aug 15 18:51:41 2011 +0200
@@ -75,9 +75,9 @@
 //		m.testRevisionMap();
 //		m.testSubrepos();
 //		m.testReadWorkingCopy();
-//		m.testParents();
+		m.testParents();
 //		m.testEffectiveFileLog();
-		m.testCatAtCsetRevision();
+//		m.testCatAtCsetRevision();
 //		m.testMergeState();
 //		m.testFileStatus();
 //		m.dumpBranches();
@@ -173,6 +173,7 @@
 			int x = clog.getLocalRevision(wcParents.second());
 			cmd.range(x, x).execute(dump);
 		}
+		System.out.println("Branch:" + hgRepo.getWorkingCopyBranchName());
 	}
 	
 	/*
diff -r 8c951645bea0 -r a6d19adc2636 src/org/tmatesoft/hg/repo/HgChangelog.java
--- a/src/org/tmatesoft/hg/repo/HgChangelog.java	Fri Aug 12 19:12:04 2011 +0200
+++ b/src/org/tmatesoft/hg/repo/HgChangelog.java	Mon Aug 15 18:51:41 2011 +0200
@@ -259,8 +259,9 @@
 			Date _time = new Date(unixTime * 1000);
 			String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null;
 			Map<String, String> _extrasMap;
+			final String extras_branch_key = "branch";
 			if (_extras == null) {
-				_extrasMap = Collections.singletonMap("branch", "default");
+				_extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
 			} else {
 				_extrasMap = new HashMap<String, String>();
 				for (String pair : _extras.split("\00")) {
@@ -268,8 +269,8 @@
 					// FIXME need to decode key/value, @see changelog.py:decodeextra
 					_extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1));
 				}
-				if (!_extrasMap.containsKey("branch")) {
-					_extrasMap.put("branch", "default");
+				if (!_extrasMap.containsKey(extras_branch_key)) {
+					_extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
 				}
 				_extrasMap = Collections.unmodifiableMap(_extrasMap);
 			}
diff -r 8c951645bea0 -r a6d19adc2636 src/org/tmatesoft/hg/repo/HgDirstate.java
--- a/src/org/tmatesoft/hg/repo/HgDirstate.java	Fri Aug 12 19:12:04 2011 +0200
+++ b/src/org/tmatesoft/hg/repo/HgDirstate.java	Mon Aug 15 18:51:41 2011 +0200
@@ -16,7 +16,9 @@
  */
 package org.tmatesoft.hg.repo;
 
+import java.io.BufferedReader;
 import java.io.File;
+import java.io.FileReader;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.LinkedHashMap;
@@ -26,7 +28,6 @@
 import org.tmatesoft.hg.core.HgBadStateException;
 import org.tmatesoft.hg.core.Nodeid;
 import org.tmatesoft.hg.internal.DataAccess;
-import org.tmatesoft.hg.internal.DataAccessProvider;
 import org.tmatesoft.hg.util.Path;
 
 
@@ -37,9 +38,9 @@
  * @author Artem Tikhomirov
  * @author TMate Software Ltd.
  */
-class HgDirstate {
+class HgDirstate /* XXX RepoChangeListener */{
 
-	private final DataAccessProvider accessProvider;
+	private final HgRepository repo;
 	private final File dirstateFile;
 	// deliberate String, not Path as it seems useless to keep Path here
 	private Map<String, Record> normal;
@@ -47,16 +48,11 @@
 	private Map<String, Record> removed;
 	private Map<String, Record> merged;
 	private Nodeid p1, p2;
-
-	/*package-local*/ HgDirstate() {
-		// empty instance
-		accessProvider = null;
-		dirstateFile = null;
-	}
-
-	public HgDirstate(DataAccessProvider dap, File dirstate) {
-		accessProvider = dap;
-		dirstateFile = dirstate;
+	private String currentBranch;
+	
+	public HgDirstate(HgRepository hgRepo, File dirstate) {
+		repo = hgRepo;
+		dirstateFile = dirstate; // XXX decide whether file names shall be kept local to reader (see #branches()) or passed from outside 
 	}
 
 	private void read() {
@@ -64,7 +60,7 @@
 		if (dirstateFile == null || !dirstateFile.exists()) {
 			return;
 		}
-		DataAccess da = accessProvider.create(dirstateFile);
+		DataAccess da = repo.getDataAccess().create(dirstateFile);
 		if (da.isEmpty()) {
 			return;
 		}
@@ -124,7 +120,7 @@
 		if (dirstateFile == null || !dirstateFile.exists()) {
 			return;
 		}
-		DataAccess da = accessProvider.create(dirstateFile);
+		DataAccess da = repo.getDataAccess().create(dirstateFile);
 		if (da.isEmpty()) {
 			return;
 		}
@@ -153,6 +149,31 @@
 		rv[1] = p2;
 		return rv;
 	}
+	
+	/**
+	 * @return branch associated with the working directory
+	 */
+	public String branch() {
+		if (currentBranch == null) {
+			currentBranch = HgRepository.DEFAULT_BRANCH_NAME;
+			File branchFile = new File(repo.getRepositoryRoot(), "branch");
+			if (branchFile.exists()) {
+				try {
+					BufferedReader r = new BufferedReader(new FileReader(branchFile));
+					String b = r.readLine();
+					if (b != null) {
+						b = b.trim().intern();
+					}
+					currentBranch = b == null || b.length() == 0 ? HgRepository.DEFAULT_BRANCH_NAME : b;
+					r.close();
+				} catch (IOException ex) {
+					ex.printStackTrace(); // XXX log verbose debug, exception might be legal here (i.e. FileNotFound)
+					// IGNORE
+				}
+			}
+		}
+		return currentBranch;
+	}
 
 	// new, modifiable collection
 	/*package-local*/ TreeSet<String> all() {
diff -r 8c951645bea0 -r a6d19adc2636 src/org/tmatesoft/hg/repo/HgRepository.java
--- a/src/org/tmatesoft/hg/repo/HgRepository.java	Fri Aug 12 19:12:04 2011 +0200
+++ b/src/org/tmatesoft/hg/repo/HgRepository.java	Mon Aug 15 18:51:41 2011 +0200
@@ -57,6 +57,8 @@
 	public static final int TIP = -3;
 	public static final int BAD_REVISION = Integer.MIN_VALUE;
 	public static final int WORKING_COPY = -2;
+	
+	public static final String DEFAULT_BRANCH_NAME = "default";
 
 	// temp aux marker method
 	public static IllegalStateException notImplemented() {
@@ -180,7 +182,7 @@
 						}
 					}
 				}
-				tags.readGlobal(new File(repoDir.getParentFile(), ".hgtags")); // XXX replace with HgDataFile.workingCopy
+				tags.readGlobal(new File(getWorkingDir(), ".hgtags")); // XXX replace with HgDataFile.workingCopy
 				tags.readLocal(new File(repoDir, "localtags"));
 			} catch (IOException ex) {
 				ex.printStackTrace(); // FIXME log or othewise report
@@ -236,6 +238,13 @@
 		Nodeid[] p = loadDirstate().parents();
 		return new Pair<Nodeid,Nodeid>(NULL == p[0] ? null : p[0], NULL == p[1] ? null : p[1]);
 	}
+	
+	/**
+	 * @return name of the branch associated with working directory, never <code>null</code>.
+	 */
+	public String getWorkingCopyBranchName() {
+		return loadDirstate().branch();
+	}
 
 	/**
 	 * @return location where user files (shall) reside
@@ -263,7 +272,7 @@
 
 	// XXX package-local, unless there are cases when required from outside (guess, working dir/revision walkers may hide dirstate access and no public visibility needed)
 	/*package-local*/ final HgDirstate loadDirstate() {
-		return new HgDirstate(getDataAccess(), new File(repoDir, "dirstate"));
+		return new HgDirstate(this, new File(repoDir, "dirstate"));
 	}
 
 	// package-local, see comment for loadDirstate
@@ -272,7 +281,7 @@
 		if (ignore == null) {
 			ignore = new HgIgnore();
 			try {
-				File ignoreFile = new File(repoDir.getParentFile(), ".hgignore");
+				File ignoreFile = new File(getWorkingDir(), ".hgignore");
 				ignore.read(ignoreFile);
 			} catch (IOException ex) {
 				ex.printStackTrace(); // log warn