From 9e5f5d4cfea5bb7706f1f8bb07795d52d37a59fe Mon Sep 17 00:00:00 2001
From: Thomas Rast <trast@student.ethz.ch>
Date: Sun, 17 Oct 2010 21:23:21 +0200
Subject: [PATCH 1/2] prefix_filename(): safely handle the case where pfx_len=0
Current prefix_filename() is proofed against the case where the prefix
'pfx' is NULL or a 0-length string, _except on Windows_.
Change the behaviour to work the same on both platforms, and only
check pfx_len so that callers passing a NULL prefix with a nonzero
pfx_len segfault early on both.
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
setup.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/setup.c b/setup.c
index a3b76de2bb1..346ef2eb2d6 100644
--- a/setup.c
+++ b/setup.c
@@ -46,7 +46,7 @@ const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
{
static char path[PATH_MAX];
#ifndef WIN32
- if (!pfx || !*pfx || is_absolute_path(arg))
+ if (!pfx_len || is_absolute_path(arg))
return arg;
memcpy(path, pfx, pfx_len);
strcpy(path + pfx_len, arg);
@@ -55,7 +55,7 @@ const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
/* don't add prefix to absolute paths, but still replace '\' by '/' */
if (is_absolute_path(arg))
pfx_len = 0;
- else
+ else if (pfx_len)
memcpy(path, pfx, pfx_len);
strcpy(path + pfx_len, arg);
for (p = path + pfx_len; *p; p++)
From 55846b9abd128185388418e025651cfd6a299a0e Mon Sep 17 00:00:00 2001
From: Thomas Rast <trast@student.ethz.ch>
Date: Sun, 17 Oct 2010 21:23:22 +0200
Subject: [PATCH 2/2] merge-file: correctly find files when called in subdir
Since b541248 (merge.conflictstyle: choose between "merge" and "diff3
-m" styles, 2008-08-29), git-merge-file uses setup_directory_gently(),
thus cd'ing around to find any possible config files to use.
This broke merge-file when it is called from within a subdirectory of
a repository, and the arguments are all relative paths.
Fix by prepending the prefix, as passed down from the main git
setup code, if there is any.
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
builtin/merge-file.c | 7 ++++++-
t/t6023-merge-file.sh | 8 ++++++++
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/builtin/merge-file.c b/builtin/merge-file.c
index b6664d49be9..6c4afb5a38b 100644
--- a/builtin/merge-file.c
+++ b/builtin/merge-file.c
@@ -28,6 +28,7 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
xmparam_t xmp = {{0}};
int ret = 0, i = 0, to_stdout = 0;
int quiet = 0;
+ int prefixlen = 0;
struct option options[] = {
OPT_BOOLEAN('p', "stdout", &to_stdout, "send results to standard output"),
OPT_SET_INT(0, "diff3", &xmp.style, "use a diff3 based merge", XDL_MERGE_DIFF3),
@@ -65,10 +66,14 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
"%s\n", strerror(errno));
}
+ if (prefix)
+ prefixlen = strlen(prefix);
+
for (i = 0; i < 3; i++) {
+ const char *fname = prefix_filename(prefix, prefixlen, argv[i]);
if (!names[i])
names[i] = argv[i];
- if (read_mmfile(mmfs + i, argv[i]))
+ if (read_mmfile(mmfs + i, fname))
return -1;
if (buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
return error("Cannot merge binary files: %s\n",
diff --git a/t/t6023-merge-file.sh b/t/t6023-merge-file.sh
index d486d73994c..d9f343942c7 100755
--- a/t/t6023-merge-file.sh
+++ b/t/t6023-merge-file.sh
@@ -64,6 +64,14 @@ cp new1.txt test.txt
test_expect_success "merge without conflict" \
"git merge-file test.txt orig.txt new2.txt"
+test_expect_success 'works in subdirectory' '
+ mkdir dir &&
+ cp new1.txt dir/a.txt &&
+ cp orig.txt dir/o.txt &&
+ cp new2.txt dir/b.txt &&
+ ( cd dir && git merge-file a.txt o.txt b.txt )
+'
+
cp new1.txt test.txt
test_expect_success "merge without conflict (--quiet)" \
"git merge-file --quiet test.txt orig.txt new2.txt"