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authorJunio C Hamano <junkio@cox.net>2007-05-19 07:39:31 (GMT)
committerJunio C Hamano <junkio@cox.net>2007-05-22 06:58:20 (GMT)
commita74db82e15cd8a2c53a4a83e9a36dc7bf7a4c750 (patch)
tree153bd3d6a6b913f07403ec91b4649a5105d32bec /builtin-pack-objects.c
parentbc32fed5516375ef78bc0f6270eb57bf1bb12d47 (diff)
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Teach "delta" attribute to pack-objects.
This teaches pack-objects to use .gitattributes mechanism so that the user can specify certain blobs are not worth spending CPU cycles to attempt deltification. The name of the attrbute is "delta", and when it is set to false, like this: == .gitattributes == *.jpg -delta they are always stored in the plain-compressed base object representation. Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'builtin-pack-objects.c')
-rw-r--r--builtin-pack-objects.c35
1 files changed, 34 insertions, 1 deletions
diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index 631fb8c..225d311 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -1,5 +1,6 @@
#include "builtin.h"
#include "cache.h"
+#include "attr.h"
#include "object.h"
#include "blob.h"
#include "commit.h"
@@ -40,9 +41,10 @@ struct object_entry {
enum object_type in_pack_type; /* could be delta */
unsigned char in_pack_header_size;
unsigned char preferred_base; /* we do not pack this, but is available
- * to be used as the base objectto delta
+ * to be used as the base object to delta
* objects against.
*/
+ unsigned char no_try_delta;
};
/*
@@ -739,6 +741,28 @@ static unsigned name_hash(const char *name)
return hash;
}
+static void setup_delta_attr_check(struct git_attr_check *check)
+{
+ static struct git_attr *attr_delta;
+
+ if (!attr_delta)
+ attr_delta = git_attr("delta", 5);
+
+ check[0].attr = attr_delta;
+}
+
+static int no_try_delta(const char *path)
+{
+ struct git_attr_check check[1];
+
+ setup_delta_attr_check(check);
+ if (git_checkattr(path, ARRAY_SIZE(check), check))
+ return 0;
+ if (ATTR_FALSE(check->value))
+ return 1;
+ return 0;
+}
+
static int add_object_entry(const unsigned char *sha1, enum object_type type,
const char *name, int exclude)
{
@@ -803,6 +827,9 @@ static int add_object_entry(const unsigned char *sha1, enum object_type type,
if (progress)
display_progress(&progress_state, nr_objects);
+ if (name && no_try_delta(name))
+ entry->no_try_delta = 1;
+
return 1;
}
@@ -1351,6 +1378,10 @@ static void find_deltas(struct object_entry **list, int window, int depth)
if (entry->size < 50)
continue;
+
+ if (entry->no_try_delta)
+ continue;
+
free_delta_index(n->index);
n->index = NULL;
free(n->data);
@@ -1378,6 +1409,8 @@ static void find_deltas(struct object_entry **list, int window, int depth)
m = array + other_idx;
if (!m->entry)
break;
+ if (m->entry->no_try_delta)
+ continue;
if (try_delta(n, m, max_depth) < 0)
break;
}