[PATCH 2/2] fast-import: add special '-' blob reference to use the previous one.
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
Documentation/git-fast-import.txt | 6 +++---
fast-import.c | 13 ++++++++++---
2 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/Documentation/git-fast-import.txt b/Documentation/git-fast-import.txt
index 9d4231e..6fce41f 100644
--- a/Documentation/git-fast-import.txt
+++ b/Documentation/git-fast-import.txt
@@ -457,9 +457,9 @@ External data format::
'M' SP <mode> SP <dataref> SP <path> LF
....
+
-Here `<dataref>` can be either a mark reference (`:<idnum>`)
-set by a prior `blob` command, or a full 40-byte SHA-1 of an
-existing Git blob object.
+Here `<dataref>` can be either a mark reference (`:<idnum>`) set by a prior
+`blob` command, a special `-` reference to use the one of the ancestor, or
+a full 40-byte SHA-1 of an existing Git blob object.
Inline data format::
The data content for the file has not been supplied yet.
diff --git a/fast-import.c b/fast-import.c
index a00d3fe..228c474 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -1385,7 +1385,8 @@ static int tree_content_set(
if (mode == S_IFREG)
mode = e->versions[0].mode;
e->versions[1].mode = (mode == S_IFREG) ? (S_IFREG | 0644) : mode;
- hashcpy(e->versions[1].sha1, sha1);
+ hashcpy(e->versions[1].sha1,
+ is_null_sha1(sha1) ? e->versions[0].sha1 : sha1);
if (e->tree)
release_tree_content_recursive(e->tree);
e->tree = subtree;
@@ -1420,7 +1421,8 @@ static int tree_content_set(
} else {
e->tree = subtree;
e->versions[1].mode = (mode == S_IFREG) ? (S_IFREG | 0644) : mode;
- hashcpy(e->versions[1].sha1, sha1);
+ hashcpy(e->versions[1].sha1,
+ is_null_sha1(sha1) ? e->versions[0].sha1 : sha1);
}
hashclr(root->versions[1].sha1);
return 1;
@@ -1862,7 +1864,7 @@ static void file_change_m(struct branch *b)
const char *endp;
struct object_entry *oe = oe;
unsigned char sha1[20];
- uint16_t mode, inline_data = 0;
+ uint16_t mode, inline_data = 0, empty_blob = 0;
if (!prefixcmp(p, "- ")) {
mode = 0;
@@ -1893,6 +1895,10 @@ static void file_change_m(struct branch *b)
} else if (!prefixcmp(p, "inline")) {
inline_data = 1;
p += 6;
+ } else if (!prefixcmp(p, "- ")) {
+ hashclr(sha1);
+ empty_blob = 1;
+ p += 1;
} else {
if (get_sha1_hex(p, sha1))
die("Invalid SHA1: %s", command_buf.buf);
@@ -1936,6 +1942,7 @@ static void file_change_m(struct branch *b)
if (oe->type != OBJ_BLOB)
die("Not a blob (actually a %s): %s",
typename(oe->type), command_buf.buf);
+ } else if (empty_blob) {
} else {
enum object_type type = sha1_object_info(sha1, NULL);
if (type < 0)
--
1.6.0.6.3.g7ccbd
Felipe Contreras <felipe.contreras@gmail.com>