From: Torsten Bögershausen <tboegi@xxxxxx>
The following didn't work as expected:
- In a middle of a merge
- merge.renormalize is true,
- .gitattributes = "* text=auto"
- core.eol = crlf
Merge a blob with CRLF "first line\r\nsame line\r\n" and a blob
with LF "first line\nsame line\n".
The expected result of the merge is "first line\nsame line\n".
The content in the working tree is "first line\r\nsame line\r\n",
and ce_compare_data() should find that the content is clean and return 0.
Deep down crlf_to_git() is invoked, to check if CRLF are converted or not.
The "new safer autocrlf handling" calls blob_has_cr().
Instead of using the sha1 of the blob, (CRLF in this example),
the function get_sha1_from_index() is invoked.
get_sha1_from_index() decides to return "ours" when in the middle of
the merge, which is LF.
As a result, the CRLF in the worktree are converted into LF before
the comparison.
The contents of LF and CRLF don't match any more.
The problem is that ce_compare_data() has ce->sha1, but the sha1 is lost
on it's way into blob_has_cr().
Forwarding ce->sha1 from ce_compare_data() into crlf_to_git() makes sure
that blob_has_cr() looks at the appropriate blob.
Add a new parameter index_blob_sha1 to convert_to_git(), and forward the
sha1 from ce_compare_data() into convert_to_git(). Other callers use NULL
for index_blob_sha1, and the sha1 is determined from path
using get_sha1_from_cache(path). This is the same handling as before.
In the same spirit, forward the sha1 into would_convert_to_git().
While at it, rename has_cr_in_index() into blob_has_cr()
and replace 0 with SAFE_CRLF_FALSE.
Add a TC in t6038 to have a test coverage under Linux.
Signed-off-by: Torsten Bögershausen <tboegi@xxxxxx>
---
builtin/apply.c | 3 ++-
builtin/blame.c | 2 +-
cache.h | 1 +
combine-diff.c | 3 ++-
convert.c | 43 ++++++++++++++++++++++++++------------
convert.h | 15 ++++++++++----
diff.c | 3 ++-
dir.c | 2 +-
read-cache.c | 4 +++-
sha1_file.c | 12 ++++++++---
t/t6038-merge-text-auto.sh | 51 +++++++++++++++++++++++++---------------------
11 files changed, 90 insertions(+), 49 deletions(-)
diff --git a/builtin/apply.c b/builtin/apply.c
index 8e4da2e..0cf9a0a 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -2140,7 +2140,8 @@ static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
case S_IFREG:
if (strbuf_read_file(buf, path, st->st_size) != st->st_size)
return error(_("unable to open or read %s"), path);
- convert_to_git(path, buf->buf, buf->len, buf, 0);
+ convert_to_git(path, buf->buf, buf->len, buf,
+ SAFE_CRLF_FALSE, NULL);
return 0;
default:
return -1;
diff --git a/builtin/blame.c b/builtin/blame.c
index 21f42b0..1c523b6 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -2377,7 +2377,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
if (strbuf_read(&buf, 0, 0) < 0)
die_errno("failed to read from stdin");
}
- convert_to_git(path, buf.buf, buf.len, &buf, 0);
+ convert_to_git(path, buf.buf, buf.len, &buf, SAFE_CRLF_FALSE, NULL);
origin->file.ptr = buf.buf;
origin->file.size = buf.len;
pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_sha1);
diff --git a/cache.h b/cache.h
index 322ee40..86f48f9 100644
--- a/cache.h
+++ b/cache.h
@@ -605,6 +605,7 @@ extern int ie_modified(const struct index_state *, const struct cache_entry *, s
#define HASH_WRITE_OBJECT 1
#define HASH_FORMAT_CHECK 2
+#define HASH_USE_SHA_NOT_PATH 4
extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
diff --git a/combine-diff.c b/combine-diff.c
index 8f2313d..8b535a7 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -1052,7 +1052,8 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
if (is_file) {
struct strbuf buf = STRBUF_INIT;
- if (convert_to_git(elem->path, result, len, &buf, safe_crlf)) {
+ if (convert_to_git(elem->path, result, len,
+ &buf, safe_crlf, NULL)) {
free(result);
result = strbuf_detach(&buf, &len);
result_size = len;
diff --git a/convert.c b/convert.c
index 67d69b5..802ee7c 100644
--- a/convert.c
+++ b/convert.c
@@ -219,23 +219,28 @@ static void check_safe_crlf(const char *path, enum crlf_action crlf_action,
}
}
-static int has_cr_in_index(const char *path)
+static int blob_has_cr(const unsigned char *index_blob_sha1)
{
unsigned long sz;
void *data;
- int has_cr;
-
- data = read_blob_data_from_cache(path, &sz);
+ int has_cr = 0;
+ enum object_type type;
+ if (!index_blob_sha1)
+ return 0;
+ data = read_sha1_file(index_blob_sha1, &type, &sz);
if (!data)
return 0;
- has_cr = memchr(data, '\r', sz) != NULL;
+ if (type == OBJ_BLOB)
+ has_cr = memchr(data, '\r', sz) != NULL;
+
free(data);
return has_cr;
}
static int crlf_to_git(const char *path, const char *src, size_t len,
struct strbuf *buf,
- enum crlf_action crlf_action, enum safe_crlf checksafe)
+ enum crlf_action crlf_action, enum safe_crlf checksafe,
+ const unsigned char *index_blob_sha1)
{
struct text_stat stats;
char *dst;
@@ -256,14 +261,23 @@ static int crlf_to_git(const char *path, const char *src, size_t len,
if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) {
if (convert_is_binary(len, &stats))
return 0;
+
/*
* If the file in the index has any CR in it, do not convert.
* This is the new safer autocrlf handling.
*/
if (checksafe == SAFE_CRLF_RENORMALIZE)
checksafe = SAFE_CRLF_FALSE;
- else if (has_cr_in_index(path))
- return 0;
+ else {
+ /*
+ * If the file in the index has any CR in it, do not convert.
+ * This is the new safer autocrlf handling.
+ */
+ if (!index_blob_sha1)
+ index_blob_sha1 = get_sha1_from_cache(path);
+ if (blob_has_cr(index_blob_sha1))
+ return 0;
+ }
}
check_safe_crlf(path, crlf_action, &stats, checksafe);
@@ -855,7 +869,8 @@ const char *get_convert_attr_ascii(const char *path)
}
int convert_to_git(const char *path, const char *src, size_t len,
- struct strbuf *dst, enum safe_crlf checksafe)
+ struct strbuf *dst, enum safe_crlf checksafe,
+ const unsigned char *index_blob_sha1)
{
int ret = 0;
const char *filter = NULL;
@@ -876,7 +891,7 @@ int convert_to_git(const char *path, const char *src, size_t len,
src = dst->buf;
len = dst->len;
}
- ret |= crlf_to_git(path, src, len, dst, ca.crlf_action, checksafe);
+ ret |= crlf_to_git(path, src, len, dst, ca.crlf_action, checksafe, index_blob_sha1);
if (ret && dst) {
src = dst->buf;
len = dst->len;
@@ -885,7 +900,8 @@ int convert_to_git(const char *path, const char *src, size_t len,
}
void convert_to_git_filter_fd(const char *path, int fd, struct strbuf *dst,
- enum safe_crlf checksafe)
+ enum safe_crlf checksafe,
+ const unsigned char *index_blob_sha1)
{
struct conv_attrs ca;
convert_attrs(&ca, path);
@@ -896,7 +912,8 @@ void convert_to_git_filter_fd(const char *path, int fd, struct strbuf *dst,
if (!apply_filter(path, NULL, 0, fd, dst, ca.drv->clean))
die("%s: clean filter '%s' failed", path, ca.drv->name);
- crlf_to_git(path, dst->buf, dst->len, dst, ca.crlf_action, checksafe);
+ crlf_to_git(path, dst->buf, dst->len, dst, ca.crlf_action,
+ checksafe, index_blob_sha1);
ident_to_git(path, dst->buf, dst->len, dst, ca.ident);
}
@@ -951,7 +968,7 @@ int renormalize_buffer(const char *path, const char *src, size_t len, struct str
src = dst->buf;
len = dst->len;
}
- return ret | convert_to_git(path, src, len, dst, SAFE_CRLF_RENORMALIZE);
+ return ret | convert_to_git(path, src, len, dst, SAFE_CRLF_RENORMALIZE, NULL);
}
/*****************************************************************
diff --git a/convert.h b/convert.h
index 81b6cdf..8c34dd5 100644
--- a/convert.h
+++ b/convert.h
@@ -39,19 +39,26 @@ extern const char *get_convert_attr_ascii(const char *path);
/* returns 1 if *dst was used */
extern int convert_to_git(const char *path, const char *src, size_t len,
- struct strbuf *dst, enum safe_crlf checksafe);
+ struct strbuf *dst, enum safe_crlf checksafe,
+ const unsigned char *index_blob_sha1);
+
extern int convert_to_working_tree(const char *path, const char *src,
size_t len, struct strbuf *dst);
extern int renormalize_buffer(const char *path, const char *src, size_t len,
struct strbuf *dst);
-static inline int would_convert_to_git(const char *path)
+static inline int would_convert_to_git(const char *path,
+ const unsigned char *index_blob_sha1)
{
- return convert_to_git(path, NULL, 0, NULL, 0);
+ return convert_to_git(path, NULL, 0, NULL, SAFE_CRLF_FALSE,
+ index_blob_sha1);
}
+
/* Precondition: would_convert_to_git_filter_fd(path) == true */
extern void convert_to_git_filter_fd(const char *path, int fd,
struct strbuf *dst,
- enum safe_crlf checksafe);
+ enum safe_crlf checksafe,
+ const unsigned char *index_blob_sha1);
+
extern int would_convert_to_git_filter_fd(const char *path);
/*****************************************************************
diff --git a/diff.c b/diff.c
index d3734d3..a8308e0 100644
--- a/diff.c
+++ b/diff.c
@@ -2810,7 +2810,8 @@ int diff_populate_filespec(struct diff_filespec *s, unsigned int flags)
/*
* Convert from working tree format to canonical git format
*/
- if (convert_to_git(s->path, s->data, s->size, &buf, crlf_warn)) {
+ if (convert_to_git(s->path, s->data, s->size, &buf,
+ crlf_warn, NULL)) {
size_t size = 0;
munmap(s->data, s->size);
s->should_munmap = 0;
diff --git a/dir.c b/dir.c
index 6172b34..66f1ffb 100644
--- a/dir.c
+++ b/dir.c
@@ -712,7 +712,7 @@ static int add_excludes(const char *fname, const char *base, int baselen,
(pos = cache_name_pos(fname, strlen(fname))) >= 0 &&
!ce_stage(active_cache[pos]) &&
ce_uptodate(active_cache[pos]) &&
- !would_convert_to_git(fname))
+ !would_convert_to_git(fname, NULL))
hashcpy(sha1_stat->sha1, active_cache[pos]->sha1);
else
hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
diff --git a/read-cache.c b/read-cache.c
index a3ef967..c109b6d 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -163,7 +163,9 @@ static int ce_compare_data(const struct cache_entry *ce, struct stat *st)
if (fd >= 0) {
unsigned char sha1[20];
- if (!index_fd(sha1, fd, st, OBJ_BLOB, ce->name, 0))
+ unsigned flags = HASH_USE_SHA_NOT_PATH;
+ memcpy(sha1, ce->sha1, sizeof(sha1));
+ if (!index_fd(sha1, fd, st, OBJ_BLOB, ce->name, flags))
match = hashcmp(sha1, ce->sha1);
/* index_fd() closed the file descriptor already */
}
diff --git a/sha1_file.c b/sha1_file.c
index d5e1121..10630f0 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -3273,6 +3273,7 @@ static int index_mem(unsigned char *sha1, void *buf, size_t size,
{
int ret, re_allocated = 0;
int write_object = flags & HASH_WRITE_OBJECT;
+ const int valid_sha1 = flags & HASH_USE_SHA_NOT_PATH;
if (!type)
type = OBJ_BLOB;
@@ -3283,7 +3284,8 @@ static int index_mem(unsigned char *sha1, void *buf, size_t size,
if ((type == OBJ_BLOB) && path) {
struct strbuf nbuf = STRBUF_INIT;
if (convert_to_git(path, buf, size, &nbuf,
- write_object ? safe_crlf : SAFE_CRLF_FALSE)) {
+ write_object ? safe_crlf : SAFE_CRLF_FALSE,
+ valid_sha1 ? sha1 : NULL)) {
buf = strbuf_detach(&nbuf, &size);
re_allocated = 1;
}
@@ -3311,13 +3313,15 @@ static int index_stream_convert_blob(unsigned char *sha1, int fd,
{
int ret;
const int write_object = flags & HASH_WRITE_OBJECT;
+ const int valid_sha1 = flags & HASH_USE_SHA_NOT_PATH;
struct strbuf sbuf = STRBUF_INIT;
assert(path);
assert(would_convert_to_git_filter_fd(path));
convert_to_git_filter_fd(path, fd, &sbuf,
- write_object ? safe_crlf : SAFE_CRLF_FALSE);
+ write_object ? safe_crlf : SAFE_CRLF_FALSE,
+ valid_sha1 ? sha1 : NULL);
if (write_object)
ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
@@ -3394,6 +3398,8 @@ int index_fd(unsigned char *sha1, int fd, struct stat *st,
enum object_type type, const char *path, unsigned flags)
{
int ret;
+ const unsigned char *sha1_ce;
+ sha1_ce = flags & HASH_USE_SHA_NOT_PATH ? sha1 : NULL;
/*
* Call xsize_t() only when needed to avoid potentially unnecessary
@@ -3404,7 +3410,7 @@ int index_fd(unsigned char *sha1, int fd, struct stat *st,
else if (!S_ISREG(st->st_mode))
ret = index_pipe(sha1, fd, type, path, flags);
else if (st->st_size <= big_file_threshold || type != OBJ_BLOB ||
- (path && would_convert_to_git(path)))
+ (path && would_convert_to_git(path,sha1_ce)))
ret = index_core(sha1, fd, xsize_t(st->st_size), type, path,
flags);
else
diff --git a/t/t6038-merge-text-auto.sh b/t/t6038-merge-text-auto.sh
index 33b77ee..5e8d5fa 100755
--- a/t/t6038-merge-text-auto.sh
+++ b/t/t6038-merge-text-auto.sh
@@ -91,16 +91,13 @@ test_expect_success 'Merge after setting text=auto' '
compare_files expected file
'
-test_expect_success 'Merge addition of text=auto' '
+test_expect_success 'Merge addition of text=auto eol=LF' '
+ git config core.eol lf &&
cat <<-\EOF >expected &&
first line
same line
EOF
- if test_have_prereq NATIVE_CRLF; then
- append_cr <expected >expected.temp &&
- mv expected.temp expected
- fi &&
git config merge.renormalize true &&
git rm -fr . &&
rm -f .gitattributes &&
@@ -109,17 +106,31 @@ test_expect_success 'Merge addition of text=auto' '
compare_files expected file
'
+test_expect_success 'Merge addition of text=auto eol=CRLF' '
+ git config core.eol crlf &&
+ cat <<-\EOF >expected &&
+ first line
+ same line
+ EOF
+
+ append_cr <expected >expected.temp &&
+ mv expected.temp expected &&
+ git config merge.renormalize true &&
+ git rm -fr . &&
+ rm -f .gitattributes &&
+ git reset --hard b &&
+ echo >&2 "After git reset --hard b" &&
+ git ls-files -s --eol >&2 &&
+ git merge a &&
+ compare_files expected file
+'
+
test_expect_success 'Detect CRLF/LF conflict after setting text=auto' '
+ git config core.eol native &&
echo "<<<<<<<" >expected &&
- if test_have_prereq NATIVE_CRLF; then
- echo first line | append_cr >>expected &&
- echo same line | append_cr >>expected &&
- echo ======= | append_cr >>expected
- else
- echo first line >>expected &&
- echo same line >>expected &&
- echo ======= >>expected
- fi &&
+ echo first line >>expected &&
+ echo same line >>expected &&
+ echo ======= >>expected &&
echo first line | append_cr >>expected &&
echo same line | append_cr >>expected &&
echo ">>>>>>>" >>expected &&
@@ -135,15 +146,9 @@ test_expect_success 'Detect LF/CRLF conflict from addition of text=auto' '
echo "<<<<<<<" >expected &&
echo first line | append_cr >>expected &&
echo same line | append_cr >>expected &&
- if test_have_prereq NATIVE_CRLF; then
- echo ======= | append_cr >>expected &&
- echo first line | append_cr >>expected &&
- echo same line | append_cr >>expected
- else
- echo ======= >>expected &&
- echo first line >>expected &&
- echo same line >>expected
- fi &&
+ echo ======= >>expected &&
+ echo first line >>expected &&
+ echo same line >>expected &&
echo ">>>>>>>" >>expected &&
git config merge.renormalize false &&
rm -f .gitattributes &&
--
2.0.0.rc1.6318.g0c2c796
--
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