Note that users fetching over dumb protocols will have to fetch the
whole new pack in order to get any contained object, no matter how many
other objects in that pack they already have locally.
++
+Promisor packfiles are repacked separately: if there are packfiles that
+have an associated ".promisor" file, these packfiles will be repacked
+into another separate pack, and an empty ".promisor" file corresponding
+to the new separate pack will be written.
-A::
Same as `-a`, unless `-d` is used. Then any unreachable
#include "strbuf.h"
#include "string-list.h"
#include "argv-array.h"
+#include "packfile.h"
static int delta_base_offset = 1;
static int pack_kept_objects = -1;
/*
* Adds all packs hex strings to the fname list, which do not
- * have a corresponding .keep or .promisor file. These packs are not to
+ * have a corresponding .keep file. These packs are not to
* be kept if we are going to pack everything into one file.
*/
static void get_non_kept_pack_filenames(struct string_list *fname_list,
fname = xmemdupz(e->d_name, len);
- if (!file_exists(mkpath("%s/%s.keep", packdir, fname)) &&
- !file_exists(mkpath("%s/%s.promisor", packdir, fname)))
+ if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
string_list_append_nodup(fname_list, fname);
else
free(fname);
static void remove_redundant_pack(const char *dir_name, const char *base_name)
{
- const char *exts[] = {".pack", ".idx", ".keep", ".bitmap"};
+ const char *exts[] = {".pack", ".idx", ".keep", ".bitmap", ".promisor"};
int i;
struct strbuf buf = STRBUF_INIT;
size_t plen;
cmd->out = -1;
}
+/*
+ * Write oid to the given struct child_process's stdin, starting it first if
+ * necessary.
+ */
+static int write_oid(const struct object_id *oid, struct packed_git *pack,
+ uint32_t pos, void *data)
+{
+ struct child_process *cmd = data;
+
+ if (cmd->in == -1) {
+ if (start_command(cmd))
+ die("Could not start pack-objects to repack promisor objects");
+ }
+
+ xwrite(cmd->in, oid_to_hex(oid), GIT_SHA1_HEXSZ);
+ xwrite(cmd->in, "\n", 1);
+ return 0;
+}
+
+static void repack_promisor_objects(const struct pack_objects_args *args,
+ struct string_list *names)
+{
+ struct child_process cmd = CHILD_PROCESS_INIT;
+ FILE *out;
+ struct strbuf line = STRBUF_INIT;
+
+ prepare_pack_objects(&cmd, args);
+ cmd.in = -1;
+
+ /*
+ * NEEDSWORK: Giving pack-objects only the OIDs without any ordering
+ * hints may result in suboptimal deltas in the resulting pack. See if
+ * the OIDs can be sent with fake paths such that pack-objects can use a
+ * {type -> existing pack order} ordering when computing deltas instead
+ * of a {type -> size} ordering, which may produce better deltas.
+ */
+ for_each_packed_object(write_oid, &cmd,
+ FOR_EACH_OBJECT_PROMISOR_ONLY);
+
+ if (cmd.in == -1)
+ /* No packed objects; cmd was never started */
+ return;
+
+ close(cmd.in);
+
+ out = xfdopen(cmd.out, "r");
+ while (strbuf_getline_lf(&line, out) != EOF) {
+ char *promisor_name;
+ int fd;
+ if (line.len != 40)
+ die("repack: Expecting 40 character sha1 lines only from pack-objects.");
+ string_list_append(names, line.buf);
+
+ /*
+ * pack-objects creates the .pack and .idx files, but not the
+ * .promisor file. Create the .promisor file, which is empty.
+ */
+ promisor_name = mkpathdup("%s-%s.promisor", packtmp,
+ line.buf);
+ fd = open(promisor_name, O_CREAT|O_EXCL|O_WRONLY, 0600);
+ if (fd < 0)
+ die_errno("unable to create '%s'", promisor_name);
+ close(fd);
+ free(promisor_name);
+ }
+ fclose(out);
+ if (finish_command(&cmd))
+ die("Could not finish pack-objects to repack promisor objects");
+}
+
#define ALL_INTO_ONE 1
#define LOOSEN_UNREACHABLE 2
{".pack"},
{".idx"},
{".bitmap", 1},
+ {".promisor", 1},
};
struct child_process cmd = CHILD_PROCESS_INIT;
struct string_list_item *item;
if (pack_everything & ALL_INTO_ONE) {
get_non_kept_pack_filenames(&existing_packs, &keep_pack_list);
+ repack_promisor_objects(&po_args, &names);
+
if (existing_packs.nr && delete_redundant) {
if (unpack_unreachable) {
argv_array_pushf(&cmd.args,
/* End of pack replacement. */
+ reprepare_packed_git(the_repository);
+
if (delete_redundant) {
int opts = 0;
string_list_sort(&names);
git -C repo rev-list --exclude-promisor-objects --objects "$COMMIT" "$TREE" "$BLOB"
'
-test_expect_success 'gc does not repack promisor objects' '
+test_expect_success 'gc repacks promisor objects separately from non-promisor objects' '
rm -rf repo &&
test_create_repo repo &&
- test_commit -C repo my_commit &&
+ test_commit -C repo one &&
+ test_commit -C repo two &&
- TREE_HASH=$(git -C repo rev-parse HEAD^{tree}) &&
- HASH=$(printf "$TREE_HASH\n" | pack_as_from_promisor) &&
+ TREE_ONE=$(git -C repo rev-parse one^{tree}) &&
+ printf "$TREE_ONE\n" | pack_as_from_promisor &&
+ TREE_TWO=$(git -C repo rev-parse two^{tree}) &&
+ printf "$TREE_TWO\n" | pack_as_from_promisor &&
git -C repo config core.repositoryformatversion 1 &&
git -C repo config extensions.partialclone "arbitrary string" &&
git -C repo gc &&
- # Ensure that the promisor packfile still exists, and remove it
- test -e repo/.git/objects/pack/pack-$HASH.pack &&
- rm repo/.git/objects/pack/pack-$HASH.* &&
-
- # Ensure that the single other pack contains the commit, but not the tree
+ # Ensure that exactly one promisor packfile exists, and that it
+ # contains the trees but not the commits
+ ls repo/.git/objects/pack/pack-*.promisor >promisorlist &&
+ test_line_count = 1 promisorlist &&
+ PROMISOR_PACKFILE=$(sed "s/.promisor/.pack/" <promisorlist) &&
+ git verify-pack $PROMISOR_PACKFILE -v >out &&
+ grep "$TREE_ONE" out &&
+ grep "$TREE_TWO" out &&
+ ! grep "$(git -C repo rev-parse one)" out &&
+ ! grep "$(git -C repo rev-parse two)" out &&
+
+ # Remove the promisor packfile and associated files
+ rm $(sed "s/.promisor//" <promisorlist).* &&
+
+ # Ensure that the single other pack contains the commits, but not the
+ # trees
ls repo/.git/objects/pack/pack-*.pack >packlist &&
test_line_count = 1 packlist &&
git verify-pack repo/.git/objects/pack/pack-*.pack -v >out &&
- grep "$(git -C repo rev-parse HEAD)" out &&
- ! grep "$TREE_HASH" out
+ grep "$(git -C repo rev-parse one)" out &&
+ grep "$(git -C repo rev-parse two)" out &&
+ ! grep "$TREE_ONE" out &&
+ ! grep "$TREE_TWO" out
+'
+
+test_expect_success 'gc does not repack promisor objects if there are none' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo one &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo gc &&
+
+ # Ensure that only one pack exists
+ ls repo/.git/objects/pack/pack-*.pack >packlist &&
+ test_line_count = 1 packlist
+'
+
+repack_and_check () {
+ rm -rf repo2 &&
+ cp -r repo repo2 &&
+ git -C repo2 repack $1 -d &&
+ git -C repo2 fsck &&
+
+ git -C repo2 cat-file -e $2 &&
+ git -C repo2 cat-file -e $3
+}
+
+test_expect_success 'repack -d does not irreversibly delete promisor objects' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+
+ git -C repo commit --allow-empty -m one &&
+ git -C repo commit --allow-empty -m two &&
+ git -C repo commit --allow-empty -m three &&
+ git -C repo commit --allow-empty -m four &&
+ ONE=$(git -C repo rev-parse HEAD^^^) &&
+ TWO=$(git -C repo rev-parse HEAD^^) &&
+ THREE=$(git -C repo rev-parse HEAD^) &&
+
+ printf "$TWO\n" | pack_as_from_promisor &&
+ printf "$THREE\n" | pack_as_from_promisor &&
+ delete_object repo "$ONE" &&
+
+ repack_and_check -a "$TWO" "$THREE" &&
+ repack_and_check -A "$TWO" "$THREE" &&
+ repack_and_check -l "$TWO" "$THREE"
'
test_expect_success 'gc stops traversal when a missing but promised object is reached' '
projects / thirdparty / git.git / commitdiff
