Preventing objects with broken links entering the repository
means, that write of some objects must be delayed.
This patch adds a cache to keep the object data in memory. The delta
resolving code must also search in the cache.
Signed-off-by: Martin Koegler <mkoegler@xxxxxxxxxxxxxxxxx>
---
builtin-unpack-objects.c | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/builtin-unpack-objects.c b/builtin-unpack-objects.c
index 1e51865..f18c7e8 100644
--- a/builtin-unpack-objects.c
+++ b/builtin-unpack-objects.c
@@ -8,6 +8,7 @@
#include "tag.h"
#include "tree.h"
#include "progress.h"
+#include "decorate.h"
static int dry_run, quiet, recover, has_errors;
static const char unpack_usage[] = "git-unpack-objects [-n] [-q] [-r] < pack-file";
@@ -18,6 +19,28 @@ static unsigned int offset, len;
static off_t consumed_bytes;
static SHA_CTX ctx;
+struct obj_buffer {
+ char *buffer;
+ unsigned long size;
+};
+
+static struct decoration obj_decorate;
+
+static struct obj_buffer *lookup_object_buffer(struct object *base)
+{
+ return lookup_decoration(&obj_decorate, base);
+}
+
+static void add_object_buffer(struct object *object, char *buffer, unsigned long size)
+{
+ struct obj_buffer *obj;
+ obj = xcalloc(1, sizeof(struct obj_buffer));
+ obj->buffer = buffer;
+ obj->size = size;
+ if (add_decoration(&obj_decorate, object, obj))
+ die("object %s tried to add buffer twice!", sha1_to_hex(object->sha1));
+}
+
/*
* Make sure at least "min" bytes are available in the buffer, and
* return the pointer to the buffer.
@@ -252,6 +275,15 @@ static void unpack_delta_entry(enum object_type type, unsigned long delta_size,
}
}
+ struct object* obj = lookup_object(base_sha1);
+ if (obj) {
+ struct obj_buffer *obj_buf = lookup_object_buffer (obj);
+ if (obj_buf) {
+ resolve_delta(nr, obj->type, obj_buf->buffer, obj_buf->size, delta_data, delta_size);
+ return;
+ }
+ }
+
base = read_sha1_file(base_sha1, &type, &base_size);
if (!base) {
error("failed to read delta-pack base object %s",
--
1.5.4.3.g3c5f
-
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