Ensure EOL stream type is DIRECT when -text attribute is present

Otherwise fancy combinations of attributes (binary or -text in
combination with crlf or eol) may result in the corruption of binary
data.

Bug: 520910
Change-Id: I3ffc666c13d1b9d2ed987b69a67bfc7f42ccdbfc
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/AddCommandTest.java

@@ -302,6 +302,21 @@ public class AddCommandTest extends RepositoryTestCase {
 		}
 	}
 
+	@Test
+	public void testAttributesConflictingMatch() throws Exception {
+		writeTrashFile(".gitattributes", "foo/** crlf=input\n*.jar binary");
+		writeTrashFile("foo/bar.jar", "\r\n");
+		// We end up with attributes [binary -diff -merge -text crlf=input].
+		// crlf should have no effect when -text is present.
+		try (Git git = new Git(db)) {
+			git.add().addFilepattern(".").call();
+			assertEquals(
+					"[.gitattributes, mode:100644, content:foo/** crlf=input\n*.jar binary]"
+							+ "[foo/bar.jar, mode:100644, content:\r\n]",
+					indexState(CONTENT));
+		}
+	}
+
 	@Test
 	public void testCleanFilterEnvironment()
 			throws IOException, GitAPIException {

org.eclipse.jgit/src/org/eclipse/jgit/util/io/EolStreamTypeUtil.java

@@ -144,6 +144,11 @@ public final class EolStreamTypeUtil {
 
 	private static EolStreamType checkInStreamType(WorkingTreeOptions options,
 			Attributes attrs) {
+		if (attrs.isUnset("text")) {//$NON-NLS-1$
+			// "binary" or "-text" (which is included in the binary expansion)
+			return EolStreamType.DIRECT;
+		}
+
 		// old git system
 		if (attrs.isSet("crlf")) {//$NON-NLS-1$
 			return EolStreamType.TEXT_LF;
@@ -154,9 +159,6 @@ public final class EolStreamTypeUtil {
 		}
 
 		// new git system
-		if (attrs.isUnset("text")) {//$NON-NLS-1$
-			return EolStreamType.DIRECT;
-		}
 		String eol = attrs.getValue("eol"); //$NON-NLS-1$
 		if (eol != null)
 			// check-in is always normalized to LF
@@ -183,6 +185,11 @@ public final class EolStreamTypeUtil {
 
 	private static EolStreamType checkOutStreamType(WorkingTreeOptions options,
 			Attributes attrs) {
+		if (attrs.isUnset("text")) {//$NON-NLS-1$
+			// "binary" or "-text" (which is included in the binary expansion)
+			return EolStreamType.DIRECT;
+		}
+
 		// old git system
 		if (attrs.isSet("crlf")) {//$NON-NLS-1$
 			return FORCE_EOL_LF_ON_CHECKOUT ? EolStreamType.TEXT_LF
@@ -194,9 +201,6 @@ public final class EolStreamTypeUtil {
 		}
 
 		// new git system
-		if (attrs.isUnset("text")) {//$NON-NLS-1$
-			return EolStreamType.DIRECT;
-		}
 		String eol = attrs.getValue("eol"); //$NON-NLS-1$
 		if (eol != null && "crlf".equals(eol)) //$NON-NLS-1$
 			return EolStreamType.TEXT_CRLF;