Adds strict option, which bails out if the pack would
introduces broken object or links in the repository.
Signed-off-by: Martin Koegler <mkoegler@xxxxxxxxxxxxxxxxx>
---
The resource usage for (!strict) is the same.
For (strict) we need the struct blob/tree/commit/tag for
each object (without any data).
Documentation/git-index-pack.txt | 3 +
index-pack.c | 86 +++++++++++++++++++++++++++++++++++++-
2 files changed, 88 insertions(+), 1 deletions(-)
diff --git a/Documentation/git-index-pack.txt b/Documentation/git-index-pack.txt
index 72b5d00..a7825b6 100644
--- a/Documentation/git-index-pack.txt
+++ b/Documentation/git-index-pack.txt
@@ -75,6 +75,9 @@ OPTIONS
to force the version for the generated pack index, and to force
64-bit index entries on objects located above the given offset.
+--strict::
+ Die, if the pack contains broken objects or links.
+
Note
----
diff --git a/index-pack.c b/index-pack.c
index 9fd6982..0bbf42e 100644
--- a/index-pack.c
+++ b/index-pack.c
@@ -7,9 +7,10 @@
#include "tag.h"
#include "tree.h"
#include "progress.h"
+#include "fsck.h"
static const char index_pack_usage[] =
-"git-index-pack [-v] [-o <index-file>] [{ ---keep | --keep=<msg> }] { <pack-file> | --stdin [--fix-thin] [<pack-file>] }";
+"git-index-pack [-v] [-o <index-file>] [{ ---keep | --keep=<msg> }] [--strict] { <pack-file> | --stdin [--fix-thin] [<pack-file>] }";
struct object_entry
{
@@ -31,6 +32,9 @@ union delta_base {
*/
#define UNION_BASE_SZ 20
+#define FLAG_LINK (1u<<20)
+#define FLAG_CHECKED (1u<<21)
+
struct delta_entry
{
union delta_base base;
@@ -44,6 +48,7 @@ static int nr_deltas;
static int nr_resolved_deltas;
static int from_stdin;
+static int strict;
static int verbose;
static struct progress *progress;
@@ -56,6 +61,48 @@ static SHA_CTX input_ctx;
static uint32_t input_crc32;
static int input_fd, output_fd, pack_fd;
+static int mark_link(struct object* obj, int type, void *data)
+{
+ if (!obj)
+ return -1;
+
+ if (type != OBJ_ANY && obj->type != type)
+ die("object type mismatch at %s", sha1_to_hex(obj->sha1));
+
+ obj->flags |= FLAG_LINK;
+ return 0;
+}
+
+/* The content of each linked object must have been checked
+ or it must be already present in the object database */
+static void check_object(struct object* obj)
+{
+ if (!obj)
+ return;
+
+ if (!(obj->flags & FLAG_LINK))
+ return;
+
+ if (!(obj->flags & FLAG_CHECKED)) {
+ unsigned long size;
+ int type = sha1_object_info (obj->sha1, &size);
+ if (type != obj->type || type <= 0)
+ die("object of unexpected type");
+ obj->flags |= FLAG_CHECKED;
+ return;
+ }
+}
+
+static void check_objects()
+{
+ unsigned i, max;
+
+ max = get_max_object_index();
+ for (i = 0; i < max; i++)
+ check_object(get_indexed_object(i));
+}
+
+
/* Discard current buffer used content. */
static void flush(void)
{
@@ -341,6 +388,39 @@ static void sha1_object(const void *data, unsigned long size,
die("SHA1 COLLISION FOUND WITH %s !", sha1_to_hex(sha1));
free(has_data);
}
+ if (strict) {
+ if (type == OBJ_BLOB) {
+ struct blob * blob = lookup_blob(sha1);
+ if (blob)
+ blob->object.flags |= FLAG_CHECKED;
+ else
+ die("invalid blob object %s", sha1_to_hex(sha1));
+ } else {
+ struct object * obj;
+ int eaten;
+ void *buf = data;
+
+ /* we do not need to free the memory here, as the buf is deleted
+ by the caller */
+ obj = parse_object_buffer(sha1, type, size, buf, &eaten);
+ if (!obj)
+ die("invalid %s", typename(type));
+ if (fsck_object(obj, 1, fsck_error_function))
+ die("Error in object");
+ if (fsck_walk(obj, mark_link, 0))
+ die("Not all child objects of %s are reachable", sha1_to_hex(obj->sha1));
+
+ if (obj->type == OBJ_TREE) {
+ struct tree *item = (struct item*) obj;
+ item->buffer = NULL;
+ }
+ if (obj->type == OBJ_COMMIT) {
+ struct commit *commit = (struct commit*) obj;
+ commit->buffer = NULL;
+ }
+ obj->flags |= FLAG_CHECKED;
+ }
+ }
}
static void resolve_delta(struct object_entry *delta_obj, void *base_data,
@@ -714,6 +794,8 @@ int main(int argc, char **argv)
from_stdin = 1;
} else if (!strcmp(arg, "--fix-thin")) {
fix_thin_pack = 1;
+ } else if (!strcmp(arg, "--strict")) {
+ strict = 1;
} else if (!strcmp(arg, "--keep")) {
keep_msg = "";
} else if (!prefixcmp(arg, "--keep=")) {
@@ -812,6 +894,8 @@ int main(int argc, char **argv)
nr_deltas - nr_resolved_deltas);
}
free(deltas);
+ if (strict)
+ check_objects();
idx_objects = xmalloc((nr_objects) * sizeof(struct pack_idx_entry *));
for (i = 0; i < nr_objects; i++)
--
1.5.4.3.g3c5f
-
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
