Fix TransportException when reading bundle

When reading a bundle file, commit messages who's oneline format is
longer than 982 characters caused JGit to treat subsequent text in
the commit as a SHA, then throw a TransportException because it's
not a valid SHA.

Now the readLine method will read all the way to the end of the
line, not just the first 1024 characters of it.

Change-Id: If15b491aa9a1e4fd9b8bbed2dd9e6be47a64ccb7
Signed-off-by: Chris Gavin <chris@chrisgavin.me>

org.eclipse.jgit/src/org/eclipse/jgit/transport/BundleFetchConnection.java

@@ -161,16 +161,23 @@ class BundleFetchConnection extends BaseFetchConnection {
 	}
 
 	private String readLine(final byte[] hdrbuf) throws IOException {
-		bin.mark(hdrbuf.length);
-		final int cnt = bin.read(hdrbuf);
-		int lf = 0;
-		while (lf < cnt && hdrbuf[lf] != '\n')
-			lf++;
-		bin.reset();
-		IO.skipFully(bin, lf);
-		if (lf < cnt && hdrbuf[lf] == '\n')
-			IO.skipFully(bin, 1);
-		return RawParseUtils.decode(Constants.CHARSET, hdrbuf, 0, lf);
+		StringBuilder line = new StringBuilder();
+		boolean done = false;
+		while (!done) {
+			bin.mark(hdrbuf.length);
+			final int cnt = bin.read(hdrbuf);
+			int lf = 0;
+			while (lf < cnt && hdrbuf[lf] != '\n')
+				lf++;
+			bin.reset();
+			IO.skipFully(bin, lf);
+			if (lf < cnt && hdrbuf[lf] == '\n') {
+				IO.skipFully(bin, 1);
+				done = true;
+			}
+			line.append(RawParseUtils.decode(Constants.CHARSET, hdrbuf, 0, lf));
+		}
+		return line.toString();
 	}
 
 	public boolean didFetchTestConnectivity() {