From f3999e03274df6b98a98a32912f5e171d6eea35f Mon Sep 17 00:00:00 2001
From: Bobby Powers <bobbypowers@gmail.com>
Date: Wed, 16 May 2012 10:28:31 -0400
Subject: diff --no-index: reset temporary buffer lengths on directory
 iteration
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Content-Type: text/plain; charset=UTF-8
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Commit 875b91b (diff --no-index: use strbuf for temporary pathnames,
2012-04-25) introduced a regression when using diff --no-index with
directories.  When iterating through a directory, the switch to strbuf
from heap-allocated char arrays caused paths to form like 'dir/file1',
'dir/file1file2', rather than 'dir/file1', 'dir/file2' as expected.

Avoid this by resetting the paths variables to their original length
before each iteration.

Signed-off-by: Bobby Powers <bobbypowers@gmail.com>
Reviewed-by: René Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff-no-index.c b/diff-no-index.c
index b44473e..3080b66 100644
--- a/diff-no-index.c
+++ b/diff-no-index.c
@@ -68,6 +68,7 @@ static int queue_diff(struct diff_options *o,
 		struct string_list p1 = STRING_LIST_INIT_DUP;
 		struct string_list p2 = STRING_LIST_INIT_DUP;
 		int i1, i2, ret = 0;
+		size_t len1 = 0, len2 = 0;
 
 		if (name1 && read_directory(name1, &p1))
 			return -1;
@@ -80,18 +81,23 @@ static int queue_diff(struct diff_options *o,
 			strbuf_addstr(&buffer1, name1);
 			if (buffer1.len && buffer1.buf[buffer1.len - 1] != '/')
 				strbuf_addch(&buffer1, '/');
+			len1 = buffer1.len;
 		}
 
 		if (name2) {
 			strbuf_addstr(&buffer2, name2);
 			if (buffer2.len && buffer2.buf[buffer2.len - 1] != '/')
 				strbuf_addch(&buffer2, '/');
+			len2 = buffer2.len;
 		}
 
 		for (i1 = i2 = 0; !ret && (i1 < p1.nr || i2 < p2.nr); ) {
 			const char *n1, *n2;
 			int comp;
 
+			strbuf_setlen(&buffer1, len1);
+			strbuf_setlen(&buffer2, len2);
+
 			if (i1 == p1.nr)
 				comp = 1;
 			else if (i2 == p2.nr)
diff --git a/t/t4053-diff-no-index.sh b/t/t4053-diff-no-index.sh
new file mode 100755
index 0000000..4dc8c67
--- /dev/null
+++ b/t/t4053-diff-no-index.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+
+test_description='diff --no-index'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+	mkdir a &&
+	mkdir b &&
+	echo 1 >a/1 &&
+	echo 2 >a/2
+'
+
+test_expect_success 'git diff --no-index directories' '
+	git diff --no-index a b >cnt
+	test $? = 1 && test_line_count = 14 cnt
+'
+
+test_done
-- 
cgit v0.10.2-6-g49f6


From 176a33542eddc6e319bfef4ca726813ce0b9af55 Mon Sep 17 00:00:00 2001
From: Bobby Powers <bobbypowers@gmail.com>
Date: Wed, 16 May 2012 10:50:31 -0400
Subject: diff --no-index: don't leak buffers in queue_diff
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

queue_diff uses two strbufs, and at the end of the function
strbuf_reset was called.  This only reset the length of the buffer -
any allocated memory was leaked.  Using strbuf_release fixes this.

Signed-off-by: Bobby Powers <bobbypowers@gmail.com>
Reviewed-by: René Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff-no-index.c b/diff-no-index.c
index 3080b66..f0b0010 100644
--- a/diff-no-index.c
+++ b/diff-no-index.c
@@ -123,8 +123,8 @@ static int queue_diff(struct diff_options *o,
 		}
 		string_list_clear(&p1, 0);
 		string_list_clear(&p2, 0);
-		strbuf_reset(&buffer1);
-		strbuf_reset(&buffer2);
+		strbuf_release(&buffer1);
+		strbuf_release(&buffer2);
 
 		return ret;
 	} else {
-- 
cgit v0.10.2-6-g49f6