Merge "Don't confuse empty configuration variables with booleans"

org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/RepositoryConfigTest.java

 /*
  * Copyright (C) 2007, Dave Watson <dwatson@mimvista.com>
- * Copyright (C) 2009, Google Inc.
+ * Copyright (C) 2009-2010, Google Inc.
  * Copyright (C) 2008, Marek Zawirski <marek.zawirski@gmail.com>
  * Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
  * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
@@ -242,6 +242,35 @@ public void testReadLong() throws ConfigInvalidException {
 		}
 	}
 
+	public void testBooleanWithNoValue() throws ConfigInvalidException {
+		Config c = parse("[my]\n\tempty\n");
+		assertEquals("", c.getString("my", null, "empty"));
+		assertEquals(1, c.getStringList("my", null, "empty").length);
+		assertEquals("", c.getStringList("my", null, "empty")[0]);
+		assertTrue(c.getBoolean("my", "empty", false));
+		assertEquals("[my]\n\tempty\n", c.toText());
+	}
+
+	public void testEmptyString() throws ConfigInvalidException {
+		Config c = parse("[my]\n\tempty =\n");
+		assertNull(c.getString("my", null, "empty"));
+
+		String[] values = c.getStringList("my", null, "empty");
+		assertNotNull(values);
+		assertEquals(1, values.length);
+		assertNull(values[0]);
+
+		// always matches the default, because its non-boolean
+		assertTrue(c.getBoolean("my", "empty", true));
+		assertFalse(c.getBoolean("my", "empty", false));
+
+		assertEquals("[my]\n\tempty =\n", c.toText());
+
+		c = new Config();
+		c.setStringList("my", null, "empty", Arrays.asList(values));
+		assertEquals("[my]\n\tempty =\n", c.toText());
+	}
+
 	private void assertReadLong(long exp) throws ConfigInvalidException {
 		assertReadLong(exp, String.valueOf(exp));
 	}

org.eclipse.jgit/src/org/eclipse/jgit/lib/Config.java

@@ -715,9 +715,10 @@ public String toText() {
 				if (e.prefix == null || "".equals(e.prefix))
 					out.append('\t');
 				out.append(e.name);
-				if (e.value != null) {
-					if (MAGIC_EMPTY_VALUE != e.value) {
-						out.append(" = ");
+				if (MAGIC_EMPTY_VALUE != e.value) {
+					out.append(" =");
+					if (e.value != null) {
+						out.append(' ');
 						out.append(escapeValue(e.value));
 					}
 				}