DirCache: Replace isValidPath with DirCacheCheckout.checkValidPath

isValidPath is an older simple form of the validation performed by
checkValidPath. Use the latter as it more consistently matches
git-core's validation rules.

By running the same validation as fsck, callers creating an entry
for the DirCache are more likely to learn early they are trying
to build trees that will fail fsck.

Change-Id: Ibf5ac116097156aa05c18e231bc65c0854932eb1

3 files changed, 10 insertions, 36 deletions

diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/dircache/DirCacheEntryTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/dircache/DirCacheEntryTest.java
index 225ce2a907..e159ed939e 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/dircache/DirCacheEntryTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/dircache/DirCacheEntryTest.java
@@ -49,7 +49,6 @@ import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.FileMode;
 import org.eclipse.jgit.lib.ObjectId;
 import org.junit.Test;
@@ -71,7 +70,12 @@ public class DirCacheEntryTest {
 	}
 
 	private static boolean isValidPath(final String path) {
-		return DirCacheEntry.isValidPath(Constants.encode(path));
+		try {
+			DirCacheCheckout.checkValidPath(path);
+			return true;
+		} catch (InvalidPathException e) {
+			return false;
+		}
 	}
 
 	@Test
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCacheCheckout.java b/org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCacheCheckout.java
index 80dda8eb83..6bf8ed7d07 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCacheCheckout.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCacheCheckout.java
@@ -1274,7 +1274,9 @@ public class DirCacheCheckout {
 			}
 			chk.checkPathSegment(bytes, segmentStart, bytes.length);
 		} catch (CorruptObjectException e) {
-			throw new InvalidPathException(e.getMessage());
+			InvalidPathException p = new InvalidPathException(path);
+			p.initCause(e);
+			throw p;
 		}
 	}
 
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCacheEntry.java b/org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCacheEntry.java
index 458cd98e4b..b6b376ae8a 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCacheEntry.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCacheEntry.java
@@ -64,7 +64,6 @@ import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.util.IO;
 import org.eclipse.jgit.util.MutableInteger;
 import org.eclipse.jgit.util.NB;
-import org.eclipse.jgit.util.SystemReader;
 
 /**
  * A single file (or stage of a file) in a {@link DirCache}.
@@ -265,8 +264,7 @@ public class DirCacheEntry {
 	 */
 	@SuppressWarnings("boxing")
 	public DirCacheEntry(final byte[] newPath, final int stage) {
-		if (!isValidPath(newPath))
-			throw new InvalidPathException(toString(newPath));
+		DirCacheCheckout.checkValidPath(toString(newPath));
 		if (stage < 0 || 3 < stage)
 			throw new IllegalArgumentException(MessageFormat.format(
 					JGitText.get().invalidStageForPath,
@@ -725,36 +723,6 @@ public class DirCacheEntry {
 		return Constants.CHARSET.decode(ByteBuffer.wrap(path)).toString();
 	}
 
-	static boolean isValidPath(final byte[] path) {
-		if (path.length == 0)
-			return false; // empty path is not permitted.
-
-		boolean componentHasChars = false;
-		for (final byte c : path) {
-			switch (c) {
-			case 0:
-				return false; // NUL is never allowed within the path.
-
-			case '/':
-				if (componentHasChars)
-					componentHasChars = false;
-				else
-					return false;
-				break;
-			case '\\':
-			case ':':
-				// Tree's never have a backslash in them, not even on Windows
-				// but even there we regard it as an invalid path
-				if (SystemReader.getInstance().isWindows())
-					return false;
-				//$FALL-THROUGH$
-			default:
-				componentHasChars = true;
-			}
-		}
-		return componentHasChars;
-	}
-
 	static int getMaximumInfoLength(boolean extended) {
 		return extended ? INFO_LEN_EXTENDED : INFO_LEN;
 	}