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-rw-r--r--Documentation/git-pack-objects.txt11
-rw-r--r--Documentation/gitremote-helpers.txt7
-rw-r--r--Documentation/rev-list-options.txt11
-rw-r--r--Documentation/technical/repository-version.txt12
-rw-r--r--Makefile1
-rw-r--r--builtin/cat-file.c2
-rw-r--r--builtin/fetch-pack.c10
-rw-r--r--builtin/fsck.c26
-rw-r--r--builtin/gc.c3
-rw-r--r--builtin/index-pack.c111
-rw-r--r--builtin/pack-objects.c37
-rw-r--r--builtin/prune.c7
-rw-r--r--builtin/repack.c8
-rw-r--r--builtin/rev-list.c69
-rw-r--r--cache.h13
-rw-r--r--environment.c1
-rw-r--r--fetch-object.c27
-rw-r--r--fetch-object.h6
-rw-r--r--fetch-pack.c48
-rw-r--r--fetch-pack.h8
-rw-r--r--list-objects.c29
-rw-r--r--object.c2
-rw-r--r--packfile.c77
-rw-r--r--packfile.h13
-rw-r--r--remote-curl.c14
-rw-r--r--revision.c33
-rw-r--r--revision.h5
-rw-r--r--setup.c7
-rw-r--r--sha1_file.c32
-rwxr-xr-xt/t0410-partial-clone.sh343
-rw-r--r--transport.c8
-rw-r--r--transport.h11
32 files changed, 896 insertions, 96 deletions
diff --git a/Documentation/git-pack-objects.txt b/Documentation/git-pack-objects.txt
index aa403d0..81bc490 100644
--- a/Documentation/git-pack-objects.txt
+++ b/Documentation/git-pack-objects.txt
@@ -255,6 +255,17 @@ a missing object is encountered. This is the default action.
The form '--missing=allow-any' will allow object traversal to continue
if a missing object is encountered. Missing objects will silently be
omitted from the results.
++
+The form '--missing=allow-promisor' is like 'allow-any', but will only
+allow object traversal to continue for EXPECTED promisor missing objects.
+Unexpected missing object will raise an error.
+
+--exclude-promisor-objects::
+ Omit objects that are known to be in the promisor remote. (This
+ option has the purpose of operating only on locally created objects,
+ so that when we repack, we still maintain a distinction between
+ locally created objects [without .promisor] and objects from the
+ promisor remote [with .promisor].) This is used with partial clone.
SEE ALSO
--------
diff --git a/Documentation/gitremote-helpers.txt b/Documentation/gitremote-helpers.txt
index 4a584f3..4b8c93e 100644
--- a/Documentation/gitremote-helpers.txt
+++ b/Documentation/gitremote-helpers.txt
@@ -466,6 +466,13 @@ set by Git if the remote helper has the 'option' capability.
Transmit <string> as a push option. As the push option
must not contain LF or NUL characters, the string is not encoded.
+'option from-promisor' {'true'|'false'}::
+ Indicate that these objects are being fetched from a promisor.
+
+'option no-dependents' {'true'|'false'}::
+ Indicate that only the objects wanted need to be fetched, not
+ their dependents.
+
SEE ALSO
--------
linkgit:git-remote[1]
diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index 22f5c9b..7b27363 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -750,10 +750,21 @@ The form '--missing=allow-any' will allow object traversal to continue
if a missing object is encountered. Missing objects will silently be
omitted from the results.
+
+The form '--missing=allow-promisor' is like 'allow-any', but will only
+allow object traversal to continue for EXPECTED promisor missing objects.
+Unexpected missing objects will raise an error.
++
The form '--missing=print' is like 'allow-any', but will also print a
list of the missing objects. Object IDs are prefixed with a ``?'' character.
endif::git-rev-list[]
+--exclude-promisor-objects::
+ (For internal use only.) Prefilter object traversal at
+ promisor boundary. This is used with partial clone. This is
+ stronger than `--missing=allow-promisor` because it limits the
+ traversal, rather than just silencing errors about missing
+ objects.
+
--no-walk[=(sorted|unsorted)]::
Only show the given commits, but do not traverse their ancestors.
This has no effect if a range is specified. If the argument
diff --git a/Documentation/technical/repository-version.txt b/Documentation/technical/repository-version.txt
index 00ad379..e03eacc 100644
--- a/Documentation/technical/repository-version.txt
+++ b/Documentation/technical/repository-version.txt
@@ -86,3 +86,15 @@ for testing format-1 compatibility.
When the config key `extensions.preciousObjects` is set to `true`,
objects in the repository MUST NOT be deleted (e.g., by `git-prune` or
`git repack -d`).
+
+`partialclone`
+~~~~~~~~~~~~~~
+
+When the config key `extensions.partialclone` is set, it indicates
+that the repo was created with a partial clone (or later performed
+a partial fetch) and that the remote may have omitted sending
+certain unwanted objects. Such a remote is called a "promisor remote"
+and it promises that all such omitted objects can be fetched from it
+in the future.
+
+The value of this key is the name of the promisor remote.
diff --git a/Makefile b/Makefile
index 37e02ce..eb74e6c 100644
--- a/Makefile
+++ b/Makefile
@@ -802,6 +802,7 @@ LIB_OBJS += ewah/ewah_bitmap.o
LIB_OBJS += ewah/ewah_io.o
LIB_OBJS += ewah/ewah_rlw.o
LIB_OBJS += exec_cmd.o
+LIB_OBJS += fetch-object.o
LIB_OBJS += fetch-pack.o
LIB_OBJS += fsck.o
LIB_OBJS += fsmonitor.o
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index f5fa4fd..cf9ea5c 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -475,6 +475,8 @@ static int batch_objects(struct batch_options *opt)
for_each_loose_object(batch_loose_object, &sa, 0);
for_each_packed_object(batch_packed_object, &sa, 0);
+ if (repository_format_partial_clone)
+ warning("This repository has extensions.partialClone set. Some objects may not be loaded.");
cb.opt = opt;
cb.expand = &data;
diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c
index 366b9d1..15eeed7 100644
--- a/builtin/fetch-pack.c
+++ b/builtin/fetch-pack.c
@@ -53,6 +53,8 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
struct oid_array shallow = OID_ARRAY_INIT;
struct string_list deepen_not = STRING_LIST_INIT_DUP;
+ fetch_if_missing = 0;
+
packet_trace_identity("fetch-pack");
memset(&args, 0, sizeof(args));
@@ -143,6 +145,14 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
args.update_shallow = 1;
continue;
}
+ if (!strcmp("--from-promisor", arg)) {
+ args.from_promisor = 1;
+ continue;
+ }
+ if (!strcmp("--no-dependents", arg)) {
+ args.no_dependents = 1;
+ continue;
+ }
usage(fetch_pack_usage);
}
if (deepen_not.nr)
diff --git a/builtin/fsck.c b/builtin/fsck.c
index 04846d4..7a8a679 100644
--- a/builtin/fsck.c
+++ b/builtin/fsck.c
@@ -149,6 +149,15 @@ static int mark_object(struct object *obj, int type, void *data, struct fsck_opt
if (obj->flags & REACHABLE)
return 0;
obj->flags |= REACHABLE;
+
+ if (is_promisor_object(&obj->oid))
+ /*
+ * Further recursion does not need to be performed on this
+ * object since it is a promisor object (so it does not need to
+ * be added to "pending").
+ */
+ return 0;
+
if (!(obj->flags & HAS_OBJ)) {
if (parent && !has_object_file(&obj->oid)) {
printf("broken link from %7s %s\n",
@@ -208,6 +217,8 @@ static void check_reachable_object(struct object *obj)
* do a full fsck
*/
if (!(obj->flags & HAS_OBJ)) {
+ if (is_promisor_object(&obj->oid))
+ return;
if (has_sha1_pack(obj->oid.hash))
return; /* it is in pack - forget about it */
printf("missing %s %s\n", printable_type(obj),
@@ -398,7 +409,7 @@ static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
xstrfmt("%s@{%"PRItime"}", refname, timestamp));
obj->flags |= USED;
mark_object_reachable(obj);
- } else {
+ } else if (!is_promisor_object(oid)) {
error("%s: invalid reflog entry %s", refname, oid_to_hex(oid));
errors_found |= ERROR_REACHABLE;
}
@@ -434,6 +445,14 @@ static int fsck_handle_ref(const char *refname, const struct object_id *oid,
obj = parse_object(oid);
if (!obj) {
+ if (is_promisor_object(oid)) {
+ /*
+ * Increment default_refs anyway, because this is a
+ * valid ref.
+ */
+ default_refs++;
+ return 0;
+ }
error("%s: invalid sha1 pointer %s", refname, oid_to_hex(oid));
errors_found |= ERROR_REACHABLE;
/* We'll continue with the rest despite the error.. */
@@ -659,6 +678,9 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
int i;
struct alternate_object_database *alt;
+ /* fsck knows how to handle missing promisor objects */
+ fetch_if_missing = 0;
+
errors_found = 0;
check_replace_refs = 0;
@@ -731,6 +753,8 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
struct object *obj = lookup_object(oid.hash);
if (!obj || !(obj->flags & HAS_OBJ)) {
+ if (is_promisor_object(&oid))
+ continue;
error("%s: object missing", oid_to_hex(&oid));
errors_found |= ERROR_OBJECT;
continue;
diff --git a/builtin/gc.c b/builtin/gc.c
index 3c5eae0..77fa720 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -458,6 +458,9 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
argv_array_push(&prune, prune_expire);
if (quiet)
argv_array_push(&prune, "--no-progress");
+ if (repository_format_partial_clone)
+ argv_array_push(&prune,
+ "--exclude-promisor-objects");
if (run_command_v_opt(prune.argv, RUN_GIT_CMD))
return error(FAILED_RUN, prune.argv[0]);
}
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 4c51aec..5ebd370 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -1389,15 +1389,60 @@ static void fix_unresolved_deltas(struct sha1file *f)
free(sorted_by_pos);
}
+static const char *derive_filename(const char *pack_name, const char *suffix,
+ struct strbuf *buf)
+{
+ size_t len;
+ if (!strip_suffix(pack_name, ".pack", &len))
+ die(_("packfile name '%s' does not end with '.pack'"),
+ pack_name);
+ strbuf_add(buf, pack_name, len);
+ strbuf_addch(buf, '.');
+ strbuf_addstr(buf, suffix);
+ return buf->buf;
+}
+
+static void write_special_file(const char *suffix, const char *msg,
+ const char *pack_name, const unsigned char *sha1,
+ const char **report)
+{
+ struct strbuf name_buf = STRBUF_INIT;
+ const char *filename;
+ int fd;
+ int msg_len = strlen(msg);
+
+ if (pack_name)
+ filename = derive_filename(pack_name, suffix, &name_buf);
+ else
+ filename = odb_pack_name(&name_buf, sha1, suffix);
+
+ fd = odb_pack_keep(filename);
+ if (fd < 0) {
+ if (errno != EEXIST)
+ die_errno(_("cannot write %s file '%s'"),
+ suffix, filename);
+ } else {
+ if (msg_len > 0) {
+ write_or_die(fd, msg, msg_len);
+ write_or_die(fd, "\n", 1);
+ }
+ if (close(fd) != 0)
+ die_errno(_("cannot close written %s file '%s'"),
+ suffix, filename);
+ if (report)
+ *report = suffix;
+ }
+ strbuf_release(&name_buf);
+}
+
static void final(const char *final_pack_name, const char *curr_pack_name,
const char *final_index_name, const char *curr_index_name,
- const char *keep_name, const char *keep_msg,
+ const char *keep_msg, const char *promisor_msg,
unsigned char *sha1)
{
const char *report = "pack";
struct strbuf pack_name = STRBUF_INIT;
struct strbuf index_name = STRBUF_INIT;
- struct strbuf keep_name_buf = STRBUF_INIT;
int err;
if (!from_stdin) {
@@ -1409,28 +1454,12 @@ static void final(const char *final_pack_name, const char *curr_pack_name,
die_errno(_("error while closing pack file"));
}
- if (keep_msg) {
- int keep_fd, keep_msg_len = strlen(keep_msg);
-
- if (!keep_name)
- keep_name = odb_pack_name(&keep_name_buf, sha1, "keep");
-
- keep_fd = odb_pack_keep(keep_name);
- if (keep_fd < 0) {
- if (errno != EEXIST)
- die_errno(_("cannot write keep file '%s'"),
- keep_name);
- } else {
- if (keep_msg_len > 0) {
- write_or_die(keep_fd, keep_msg, keep_msg_len);
- write_or_die(keep_fd, "\n", 1);
- }
- if (close(keep_fd) != 0)
- die_errno(_("cannot close written keep file '%s'"),
- keep_name);
- report = "keep";
- }
- }
+ if (keep_msg)
+ write_special_file("keep", keep_msg, final_pack_name, sha1,
+ &report);
+ if (promisor_msg)
+ write_special_file("promisor", promisor_msg, final_pack_name,
+ sha1, NULL);
if (final_pack_name != curr_pack_name) {
if (!final_pack_name)
@@ -1472,7 +1501,6 @@ static void final(const char *final_pack_name, const char *curr_pack_name,
strbuf_release(&index_name);
strbuf_release(&pack_name);
- strbuf_release(&keep_name_buf);
}
static int git_index_pack_config(const char *k, const char *v, void *cb)
@@ -1615,32 +1643,26 @@ static void show_pack_info(int stat_only)
}
}
-static const char *derive_filename(const char *pack_name, const char *suffix,
- struct strbuf *buf)
-{
- size_t len;
- if (!strip_suffix(pack_name, ".pack", &len))
- die(_("packfile name '%s' does not end with '.pack'"),
- pack_name);
- strbuf_add(buf, pack_name, len);
- strbuf_addstr(buf, suffix);
- return buf->buf;
-}
-
int cmd_index_pack(int argc, const char **argv, const char *prefix)
{
int i, fix_thin_pack = 0, verify = 0, stat_only = 0;
const char *curr_index;
const char *index_name = NULL, *pack_name = NULL;
- const char *keep_name = NULL, *keep_msg = NULL;
- struct strbuf index_name_buf = STRBUF_INIT,
- keep_name_buf = STRBUF_INIT;
+ const char *keep_msg = NULL;
+ const char *promisor_msg = NULL;
+ struct strbuf index_name_buf = STRBUF_INIT;
struct pack_idx_entry **idx_objects;
struct pack_idx_option opts;
unsigned char pack_sha1[20];
unsigned foreign_nr = 1; /* zero is a "good" value, assume bad */
int report_end_of_input = 0;
+ /*
+ * index-pack never needs to fetch missing objects, since it only
+ * accesses the repo to do hash collision checks
+ */
+ fetch_if_missing = 0;
+
if (argc == 2 && !strcmp(argv[1], "-h"))
usage(index_pack_usage);
@@ -1678,6 +1700,8 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
stat_only = 1;
} else if (skip_to_optional_arg(arg, "--keep", &keep_msg)) {
; /* nothing to do */
+ } else if (skip_to_optional_arg(arg, "--promisor", &promisor_msg)) {
+ ; /* already parsed */
} else if (starts_with(arg, "--threads=")) {
char *end;
nr_threads = strtoul(arg+10, &end, 0);
@@ -1740,9 +1764,7 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
if (from_stdin && !startup_info->have_repository)
die(_("--stdin requires a git repository"));
if (!index_name && pack_name)
- index_name = derive_filename(pack_name, ".idx", &index_name_buf);
- if (keep_msg && !keep_name && pack_name)
- keep_name = derive_filename(pack_name, ".keep", &keep_name_buf);
+ index_name = derive_filename(pack_name, "idx", &index_name_buf);
if (verify) {
if (!index_name)
@@ -1790,13 +1812,12 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
if (!verify)
final(pack_name, curr_pack,
index_name, curr_index,
- keep_name, keep_msg,
+ keep_msg, promisor_msg,
pack_sha1);
else
close(input_fd);
free(objects);
strbuf_release(&index_name_buf);
- strbuf_release(&keep_name_buf);
if (pack_name == NULL)
free((void *) curr_pack);
if (index_name == NULL)
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 6b9cfc2..6c71552 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -75,6 +75,8 @@ static int use_bitmap_index = -1;
static int write_bitmap_index;
static uint16_t write_bitmap_options;
+static int exclude_promisor_objects;
+
static unsigned long delta_cache_size = 0;
static unsigned long max_delta_cache_size = 256 * 1024 * 1024;
static unsigned long cache_max_small_delta_size = 1000;
@@ -84,8 +86,9 @@ static unsigned long window_memory_limit = 0;
static struct list_objects_filter_options filter_options;
enum missing_action {
- MA_ERROR = 0, /* fail if any missing objects are encountered */
- MA_ALLOW_ANY, /* silently allow ALL missing objects */
+ MA_ERROR = 0, /* fail if any missing objects are encountered */
+ MA_ALLOW_ANY, /* silently allow ALL missing objects */
+ MA_ALLOW_PROMISOR, /* silently allow all missing PROMISOR objects */
};
static enum missing_action arg_missing_action;
static show_object_fn fn_show_object;
@@ -2578,6 +2581,20 @@ static void show_object__ma_allow_any(struct object *obj, const char *name, void
show_object(obj, name, data);
}
+static void show_object__ma_allow_promisor(struct object *obj, const char *name, void *data)
+{
+ assert(arg_missing_action == MA_ALLOW_PROMISOR);
+
+ /*
+ * Quietly ignore EXPECTED missing objects. This avoids problems with
+ * staging them now and getting an odd error later.
+ */
+ if (!has_object_file(&obj->oid) && is_promisor_object(&obj->oid))
+ return;
+
+ show_object(obj, name, data);
+}
+
static int option_parse_missing_action(const struct option *opt,
const char *arg, int unset)
{
@@ -2592,10 +2609,18 @@ static int option_parse_missing_action(const struct option *opt,
if (!strcmp(arg, "allow-any")) {
arg_missing_action = MA_ALLOW_ANY;
+ fetch_if_missing = 0;
fn_show_object = show_object__ma_allow_any;
return 0;
}
+ if (!strcmp(arg, "allow-promisor")) {
+ arg_missing_action = MA_ALLOW_PROMISOR;
+ fetch_if_missing = 0;
+ fn_show_object = show_object__ma_allow_promisor;
+ return 0;
+ }
+
die(_("invalid value for --missing"));
return 0;
}
@@ -3009,6 +3034,8 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
{ OPTION_CALLBACK, 0, "missing", NULL, N_("action"),
N_("handling for missing objects"), PARSE_OPT_NONEG,
option_parse_missing_action },
+ OPT_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
+ N_("do not pack objects in promisor packfiles")),
OPT_END(),
};
@@ -3054,6 +3081,12 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
argv_array_push(&rp, "--unpacked");
}
+ if (exclude_promisor_objects) {
+ use_internal_rev_list = 1;
+ fetch_if_missing = 0;
+ argv_array_push(&rp, "--exclude-promisor-objects");
+ }
+
if (!reuse_object)
reuse_delta = 0;
if (pack_compression_level == -1)
diff --git a/builtin/prune.c b/builtin/prune.c
index d2fdae6..4cfec82 100644
--- a/builtin/prune.c
+++ b/builtin/prune.c
@@ -101,12 +101,15 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
{
struct rev_info revs;
struct progress *progress = NULL;
+ int exclude_promisor_objects = 0;
const struct option options[] = {
OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
OPT__VERBOSE(&verbose, N_("report pruned objects")),
OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
OPT_EXPIRY_DATE(0, "expire", &expire,
N_("expire objects older than <time>")),
+ OPT_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
+ N_("limit traversal to objects outside promisor packfiles")),
OPT_END()
};
char *s;
@@ -139,6 +142,10 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
show_progress = isatty(2);
if (show_progress)
progress = start_delayed_progress(_("Checking connectivity"), 0);
+ if (exclude_promisor_objects) {
+ fetch_if_missing = 0;
+ revs.exclude_promisor_objects = 1;
+ }
mark_reachable_objects(&revs, 1, expire, progress);
stop_progress(&progress);
diff --git a/builtin/repack.c b/builtin/repack.c
index f17a68a..7bdb401 100644
--- a/builtin/repack.c
+++ b/builtin/repack.c
@@ -83,7 +83,8 @@ static void remove_pack_on_signal(int signo)
/*
* Adds all packs hex strings to the fname list, which do not
- * have a corresponding .keep file.
+ * have a corresponding .keep or .promisor 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)
{
@@ -101,7 +102,8 @@ 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)))
+ if (!file_exists(mkpath("%s/%s.keep", packdir, fname)) &&
+ !file_exists(mkpath("%s/%s.promisor", packdir, fname)))
string_list_append_nodup(fname_list, fname);
else
free(fname);
@@ -232,6 +234,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
argv_array_push(&cmd.args, "--all");
argv_array_push(&cmd.args, "--reflog");
argv_array_push(&cmd.args, "--indexed-objects");
+ if (repository_format_partial_clone)
+ argv_array_push(&cmd.args, "--exclude-promisor-objects");
if (window)
argv_array_pushf(&cmd.args, "--window=%s", window);
if (window_memory)
diff --git a/builtin/rev-list.c b/builtin/rev-list.c
index d5345b6..e27aa1f 100644
--- a/builtin/rev-list.c
+++ b/builtin/rev-list.c
@@ -15,6 +15,7 @@
#include "progress.h"
#include "reflog-walk.h"
#include "oidset.h"
+#include "packfile.h"
static const char rev_list_usage[] =
"git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
@@ -67,6 +68,7 @@ enum missing_action {
MA_ERROR = 0, /* fail if any missing objects are encountered */
MA_ALLOW_ANY, /* silently allow ALL missing objects */
MA_PRINT, /* print ALL missing objects in special section */
+ MA_ALLOW_PROMISOR, /* silently allow all missing PROMISOR objects */
};
static enum missing_action arg_missing_action;
@@ -197,6 +199,12 @@ static void finish_commit(struct commit *commit, void *data)
static inline void finish_object__ma(struct object *obj)
{
+ /*
+ * Whether or not we try to dynamically fetch missing objects
+ * from the server, we currently DO NOT have the object. We
+ * can either print, allow (ignore), or conditionally allow
+ * (ignore) them.
+ */
switch (arg_missing_action) {
case MA_ERROR:
die("missing blob object '%s'", oid_to_hex(&obj->oid));
@@ -209,25 +217,36 @@ static inline void finish_object__ma(struct object *obj)
oidset_insert(&missing_objects, &obj->oid);
return;
+ case MA_ALLOW_PROMISOR:
+ if (is_promisor_object(&obj->oid))
+ return;
+ die("unexpected missing blob object '%s'",
+ oid_to_hex(&obj->oid));
+ return;
+
default:
BUG("unhandled missing_action");
return;
}
}
-static void finish_object(struct object *obj, const char *name, void *cb_data)
+static int finish_object(struct object *obj, const char *name, void *cb_data)
{
struct rev_list_info *info = cb_data;
- if (obj->type == OBJ_BLOB && !has_object_file(&obj->oid))
+ if (obj->type == OBJ_BLOB && !has_object_file(&obj->oid)) {
finish_object__ma(obj);
+ return 1;
+ }
if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
parse_object(&obj->oid);
+ return 0;
}
static void show_object(struct object *obj, const char *name, void *cb_data)
{
struct rev_list_info *info = cb_data;
- finish_object(obj, name, cb_data);
+ if (finish_object(obj, name, cb_data))
+ return;
display_progress(progress, ++progress_counter);
if (info->flags & REV_LIST_QUIET)
return;
@@ -315,11 +334,19 @@ static inline int parse_missing_action_value(const char *value)
if (!strcmp(value, "allow-any")) {
arg_missing_action = MA_ALLOW_ANY;
+ fetch_if_missing = 0;
return 1;
}
if (!strcmp(value, "print")) {
arg_missing_action = MA_PRINT;
+ fetch_if_missing = 0;
+ return 1;
+ }
+
+ if (!strcmp(value, "allow-promisor")) {
+ arg_missing_action = MA_ALLOW_PROMISOR;
+ fetch_if_missing = 0;
return 1;
}
@@ -344,6 +371,35 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
init_revisions(&revs, prefix);
revs.abbrev = DEFAULT_ABBREV;
revs.commit_format = CMIT_FMT_UNSPECIFIED;
+
+ /*
+ * Scan the argument list before invoking setup_revisions(), so that we
+ * know if fetch_if_missing needs to be set to 0.
+ *
+ * "--exclude-promisor-objects" acts as a pre-filter on missing objects
+ * by not crossing the boundary from realized objects to promisor
+ * objects.
+ *
+ * Let "--missing" to conditionally set fetch_if_missing.
+ */
+ for (i = 1; i < argc; i++) {
+ const char *arg = argv[i];
+ if (!strcmp(arg, "--exclude-promisor-objects")) {
+ fetch_if_missing = 0;
+ revs.exclude_promisor_objects = 1;
+ break;
+ }
+ }
+ for (i = 1; i < argc; i++) {
+ const char *arg = argv[i];
+ if (skip_prefix(arg, "--missing=", &arg)) {
+ if (revs.exclude_promisor_objects)
+ die(_("cannot combine --exclude-promisor-objects and --missing"));
+ if (parse_missing_action_value(arg))
+ break;
+ }
+ }
+
argc = setup_revisions(argc, argv, &revs, NULL);
memset(&info, 0, sizeof(info));
@@ -412,9 +468,10 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
continue;
}
- if (skip_prefix(arg, "--missing=", &arg) &&
- parse_missing_action_value(arg))
- continue;
+ if (!strcmp(arg, "--exclude-promisor-objects"))
+ continue; /* already handled above */
+ if (skip_prefix(arg, "--missing=", &arg))
+ continue; /* already handled above */
usage(rev_list_usage);
diff --git a/cache.h b/cache.h
index d8b975a..23413fd 100644
--- a/cache.h
+++ b/cache.h
@@ -914,10 +914,12 @@ extern int grafts_replace_parents;
#define GIT_REPO_VERSION 0
#define GIT_REPO_VERSION_READ 1
extern int repository_format_precious_objects;
+extern char *repository_format_partial_clone;
struct repository_format {
int version;
int precious_objects;
+ char *partial_clone; /* value of extensions.partialclone */
int is_bare;
int hash_algo;
char *work_tree;
@@ -1648,7 +1650,8 @@ extern struct packed_git {
unsigned pack_local:1,
pack_keep:1,
freshened:1,
- do_not_close:1;
+ do_not_close:1,
+ pack_promisor:1;
unsigned char sha1[20];
struct revindex_entry *revindex;
/* something like ".git/objects/pack/xxxxx.pack" */
@@ -1787,6 +1790,14 @@ struct object_info {
#define OBJECT_INFO_QUICK 8
extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags);
+/*
+ * Set this to 0 to prevent sha1_object_info_extended() from fetching missing
+ * blobs. This has a difference only if extensions.partialClone is set.
+ *
+ * Its default value is 1.
+ */
+extern int fetch_if_missing;
+
/* Dumb servers support */
extern int update_server_info(int);
diff --git a/environment.c b/environment.c
index 63ac38a..835bb75 100644
--- a/environment.c
+++ b/environment.c
@@ -27,6 +27,7 @@ int warn_ambiguous_refs = 1;
int warn_on_object_refname_ambiguity = 1;
int ref_paranoia = -1;
int repository_format_precious_objects;
+char *repository_format_partial_clone;
const char *git_commit_encoding;
const char *git_log_output_encoding;
const char *apply_default_whitespace;
diff --git a/fetch-object.c b/fetch-object.c
new file mode 100644
index 0000000..258fcfa
--- /dev/null
+++ b/fetch-object.c
@@ -0,0 +1,27 @@
+#include "cache.h"
+#include "packfile.h"
+#include "pkt-line.h"
+#include "strbuf.h"
+#include "transport.h"
+#include "fetch-object.h"
+
+void fetch_object(const char *remote_name, const unsigned char *sha1)
+{
+ struct remote *remote;
+ struct transport *transport;
+ struct ref *ref;
+ int original_fetch_if_missing = fetch_if_missing;
+
+ fetch_if_missing = 0;
+ remote = remote_get(remote_name);
+ if (!remote->url[0])
+ die(_("Remote with no URL"));
+ transport = transport_get(remote, remote->url[0]);
+
+ ref = alloc_ref(sha1_to_hex(sha1));
+ hashcpy(ref->old_oid.hash, sha1);
+ transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
+ transport_set_option(transport, TRANS_OPT_NO_DEPENDENTS, "1");
+ transport_fetch_refs(transport, ref);
+ fetch_if_missing = original_fetch_if_missing;
+}
diff --git a/fetch-object.h b/fetch-object.h
new file mode 100644
index 0000000..f371300
--- /dev/null
+++ b/fetch-object.h
@@ -0,0 +1,6 @@
+#ifndef FETCH_OBJECT_H
+#define FETCH_OBJECT_H
+
+extern void fetch_object(const char *remote_name, const unsigned char *sha1);
+
+#endif
diff --git a/fetch-pack.c b/fetch-pack.c
index 9f6b07a..7aa1f58 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -450,6 +450,8 @@ static int find_common(struct fetch_pack_args *args,
flushes = 0;
retval = -1;
+ if (args->no_dependents)
+ goto done;
while ((oid = get_rev())) {
packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
print_verbose(args, "have %s", oid_to_hex(oid));
@@ -735,29 +737,31 @@ static int everything_local(struct fetch_pack_args *args,
}
}
- if (!args->deepen) {
- for_each_ref(mark_complete_oid, NULL);
- for_each_cached_alternate(mark_alternate_complete);
- commit_list_sort_by_date(&complete);
- if (cutoff)
- mark_recent_complete_commits(args, cutoff);
- }
+ if (!args->no_dependents) {
+ if (!args->deepen) {
+ for_each_ref(mark_complete_oid, NULL);
+ for_each_cached_alternate(mark_alternate_complete);
+ commit_list_sort_by_date(&complete);
+ if (cutoff)
+ mark_recent_complete_commits(args, cutoff);
+ }
- /*
- * Mark all complete remote refs as common refs.
- * Don't mark them common yet; the server has to be told so first.
- */
- for (ref = *refs; ref; ref = ref->next) {
- struct object *o = deref_tag(lookup_object(ref->old_oid.hash),
- NULL, 0);
+ /*
+ * Mark all complete remote refs as common refs.
+ * Don't mark them common yet; the server has to be told so first.
+ */
+ for (ref = *refs; ref; ref = ref->next) {
+ struct object *o = deref_tag(lookup_object(ref->old_oid.hash),
+ NULL, 0);
- if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
- continue;
+ if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
+ continue;
- if (!(o->flags & SEEN)) {
- rev_list_push((struct commit *)o, COMMON_REF | SEEN);
+ if (!(o->flags & SEEN)) {
+ rev_list_push((struct commit *)o, COMMON_REF | SEEN);
- mark_common((struct commit *)o, 1, 1);
+ mark_common((struct commit *)o, 1, 1);
+ }
}
}
@@ -833,7 +837,7 @@ static int get_pack(struct fetch_pack_args *args,
argv_array_push(&cmd.args, alternate_shallow_file);
}
- if (do_keep) {
+ if (do_keep || args->from_promisor) {
if (pack_lockfile)
cmd.out = -1;
cmd_name = "index-pack";
@@ -843,7 +847,7 @@ static int get_pack(struct fetch_pack_args *args,
argv_array_push(&cmd.args, "-v");
if (args->use_thin_pack)
argv_array_push(&cmd.args, "--fix-thin");
- if (args->lock_pack || unpack_limit) {
+ if (do_keep && (args->lock_pack || unpack_limit)) {
char hostname[HOST_NAME_MAX + 1];
if (xgethostname(hostname, sizeof(hostname)))
xsnprintf(hostname, sizeof(hostname), "localhost");
@@ -853,6 +857,8 @@ static int get_pack(struct fetch_pack_args *args,
}
if (args->check_self_contained_and_connected)
argv_array_push(&cmd.args, "--check-self-contained-and-connected");
+ if (args->from_promisor)
+ argv_array_push(&cmd.args, "--promisor");
}
else {
cmd_name = "unpack-objects";
diff --git a/fetch-pack.h b/fetch-pack.h
index b6aeb43..aeac152 100644
--- a/fetch-pack.h
+++ b/fetch-pack.h
@@ -29,6 +29,14 @@ struct fetch_pack_args {
unsigned cloning:1;
unsigned update_shallow:1;
unsigned deepen:1;
+ unsigned from_promisor:1;
+
+ /*
+ * If 1, fetch_pack() will also not modify any object flags.
+ * This allows fetch_pack() to safely be called by any function,
+ * regardless of which object flags it uses (if any).
+ */
+ unsigned no_dependents:1;
};
/*
diff --git a/list-objects.c b/list-objects.c
index 0966cdc..168bef6 100644
--- a/list-objects.c
+++ b/list-objects.c
@@ -9,6 +9,7 @@
#include "list-objects.h"
#include "list-objects-filter.h"
#include "list-objects-filter-options.h"
+#include "packfile.h"
static void process_blob(struct rev_info *revs,
struct blob *blob,
@@ -30,6 +31,20 @@ static void process_blob(struct rev_info *revs,
if (obj->flags & (UNINTERESTING | SEEN))
return;
+ /*
+ * Pre-filter known-missing objects when explicitly requested.
+ * Otherwise, a missing object error message may be reported
+ * later (depending on other filtering criteria).
+ *
+ * Note that this "--exclude-promisor-objects" pre-filtering
+ * may cause the actual filter to report an incomplete list
+ * of missing objects.
+ */
+ if (revs->exclude_promisor_objects &&
+ !has_object_file(&obj->oid) &&
+ is_promisor_object(&obj->oid))
+ return;
+
pathlen = path->len;
strbuf_addstr(path, name);
if (filter_fn)
@@ -91,6 +106,8 @@ static void process_tree(struct rev_info *revs,
all_entries_interesting: entry_not_interesting;
int baselen = base->len;
enum list_objects_filter_result r = LOFR_MARK_SEEN | LOFR_DO_SHOW;
+ int gently = revs->ignore_missing_links ||
+ revs->exclude_promisor_objects;
if (!revs->tree_objects)
return;
@@ -98,9 +115,19 @@ static void process_tree(struct rev_info *revs,
die("bad tree object");
if (obj->flags & (UNINTERESTING | SEEN))
return;
- if (parse_tree_gently(tree, revs->ignore_missing_links) < 0) {
+ if (parse_tree_gently(tree, gently) < 0) {
if (revs->ignore_missing_links)
return;
+
+ /*
+ * Pre-filter known-missing tree objects when explicitly
+ * requested. This may cause the actual filter to report
+ * an incomplete list of missing objects.
+ */
+ if (revs->exclude_promisor_objects &&
+ is_promisor_object(&obj->oid))
+ return;
+
die("bad tree object %s", oid_to_hex(&obj->oid));
}
diff --git a/object.c b/object.c
index 0afdfd1..9e6f9ff 100644
--- a/object.c
+++ b/object.c
@@ -252,7 +252,7 @@ struct object *parse_object(const struct object_id *oid)
if (obj && obj->parsed)
return obj;
- if ((obj && obj->type == OBJ_BLOB) ||
+ if ((obj && obj->type == OBJ_BLOB && has_object_file(oid)) ||
(!obj && has_object_file(oid) &&
sha1_object_info(oid->hash, NULL) == OBJ_BLOB)) {
if (check_sha1_signature(repl, NULL, 0, NULL) < 0) {
diff --git a/packfile.c b/packfile.c
index 4a5fe7a..234797c 100644
--- a/packfile.c
+++ b/packfile.c
@@ -8,6 +8,11 @@
#include "list.h"
#include "streaming.h"
#include "sha1-lookup.h"
+#include "commit.h"
+#include "object.h"
+#include "tag.h"
+#include "tree-walk.h"
+#include "tree.h"
char *odb_pack_name(struct strbuf *buf,
const unsigned char *sha1,
@@ -643,10 +648,10 @@ struct packed_git *add_packed_git(const char *path, size_t path_len, int local)
return NULL;
/*
- * ".pack" is long enough to hold any suffix we're adding (and
+ * ".promisor" is long enough to hold any suffix we're adding (and
* the use xsnprintf double-checks that)
*/
- alloc = st_add3(path_len, strlen(".pack"), 1);
+ alloc = st_add3(path_len, strlen(".promisor"), 1);
p = alloc_packed_git(alloc);
memcpy(p->pack_name, path, path_len);
@@ -654,6 +659,10 @@ struct packed_git *add_packed_git(const char *path, size_t path_len, int local)
if (!access(p->pack_name, F_OK))
p->pack_keep = 1;
+ xsnprintf(p->pack_name + path_len, alloc - path_len, ".promisor");
+ if (!access(p->pack_name, F_OK))
+ p->pack_promisor = 1;
+
xsnprintf(p->pack_name + path_len, alloc - path_len, ".pack");
if (stat(p->pack_name, &st) || !S_ISREG(st.st_mode)) {
free(p);
@@ -781,7 +790,8 @@ static void prepare_packed_git_one(char *objdir, int local)
if (ends_with(de->d_name, ".idx") ||
ends_with(de->d_name, ".pack") ||
ends_with(de->d_name, ".bitmap") ||
- ends_with(de->d_name, ".keep"))
+ ends_with(de->d_name, ".keep") ||
+ ends_with(de->d_name, ".promisor"))
string_list_append(&garbage, path.buf);
else
report_garbage(PACKDIR_FILE_GARBAGE, path.buf);
@@ -1889,6 +1899,9 @@ int for_each_packed_object(each_packed_object_fn cb, void *data, unsigned flags)
for (p = packed_git; p; p = p->next) {
if ((flags & FOR_EACH_OBJECT_LOCAL_ONLY) && !p->pack_local)
continue;
+ if ((flags & FOR_EACH_OBJECT_PROMISOR_ONLY) &&
+ !p->pack_promisor)
+ continue;
if (open_pack_index(p)) {
pack_errors = 1;
continue;
@@ -1899,3 +1912,61 @@ int for_each_packed_object(each_packed_object_fn cb, void *data, unsigned flags)
}
return r ? r : pack_errors;
}
+
+static int add_promisor_object(const struct object_id *oid,
+ struct packed_git *pack,
+ uint32_t pos,
+ void *set_)
+{
+ struct oidset *set = set_;
+ struct object *obj = parse_object(oid);
+ if (!obj)
+ return 1;
+
+ oidset_insert(set, oid);
+
+ /*
+ * If this is a tree, commit, or tag, the objects it refers
+ * to are also promisor objects. (Blobs refer to no objects.)
+ */
+ if (obj->type == OBJ_TREE) {
+ struct tree *tree = (struct tree *)obj;
+ struct tree_desc desc;
+ struct name_entry entry;
+ if (init_tree_desc_gently(&desc, tree->buffer, tree->size))
+ /*
+ * Error messages are given when packs are
+ * verified, so do not print any here.
+ */
+ return 0;
+ while (tree_entry_gently(&desc, &entry))
+ oidset_insert(set, entry.oid);
+ } else if (obj->type == OBJ_COMMIT) {
+ struct commit *commit = (struct commit *) obj;
+ struct commit_list *parents = commit->parents;
+
+ oidset_insert(set, &commit->tree->object.oid);
+ for (; parents; parents = parents->next)
+ oidset_insert(set, &parents->item->object.oid);
+ } else if (obj->type == OBJ_TAG) {
+ struct tag *tag = (struct tag *) obj;
+ oidset_insert(set, &tag->tagged->oid);
+ }
+ return 0;
+}
+
+int is_promisor_object(const struct object_id *oid)
+{
+ static struct oidset promisor_objects;
+ static int promisor_objects_prepared;
+
+ if (!promisor_objects_prepared) {
+ if (repository_format_partial_clone) {
+ for_each_packed_object(add_promisor_object,
+ &promisor_objects,
+ FOR_EACH_OBJECT_PROMISOR_ONLY);
+ }
+ promisor_objects_prepared = 1;
+ }
+ return oidset_contains(&promisor_objects, oid);
+}
diff --git a/packfile.h b/packfile.h
index 0cdeb54..a7fca59 100644
--- a/packfile.h
+++ b/packfile.h
@@ -1,6 +1,8 @@
#ifndef PACKFILE_H
#define PACKFILE_H
+#include "oidset.h"
+
/*
* Generate the filename to be used for a pack file with checksum "sha1" and
* extension "ext". The result is written into the strbuf "buf", overwriting
@@ -125,6 +127,11 @@ extern int has_sha1_pack(const unsigned char *sha1);
extern int has_pack_index(const unsigned char *sha1);
/*
+ * Only iterate over packs obtained from the promisor remote.
+ */
+#define FOR_EACH_OBJECT_PROMISOR_ONLY 2
+
+/*
* Iterate over packed objects in both the local
* repository and any alternates repositories (unless the
* FOR_EACH_OBJECT_LOCAL_ONLY flag, defined in cache.h, is set).
@@ -135,4 +142,10 @@ typedef int each_packed_object_fn(const struct object_id *oid,
void *data);
extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags);
+/*
+ * Return 1 if an object in a promisor packfile is or refers to the given
+ * object, 0 otherwise.
+ */
+extern int is_promisor_object(const struct object_id *oid);
+
#endif
diff --git a/remote-curl.c b/remote-curl.c
index 0053b09..4318391 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -33,7 +33,9 @@ struct options {
thin : 1,
/* One of the SEND_PACK_PUSH_CERT_* constants. */
push_cert : 2,
- deepen_relative : 1;
+ deepen_relative : 1,
+ from_promisor : 1,
+ no_dependents : 1;
};
static struct options options;
static struct string_list cas_options = STRING_LIST_INIT_DUP;
@@ -157,6 +159,12 @@ static int set_option(const char *name, const char *value)
return -1;
return 0;
#endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
+ } else if (!strcmp(name, "from-promisor")) {
+ options.from_promisor = 1;
+ return 0;
+ } else if (!strcmp(name, "no-dependents")) {
+ options.no_dependents = 1;
+ return 0;
} else {
return 1 /* unsupported */;
}
@@ -822,6 +830,10 @@ static int fetch_git(struct discovery *heads,
options.deepen_not.items[i].string);
if (options.deepen_relative && options.depth)
argv_array_push(&args, "--deepen-relative");
+ if (options.from_promisor)
+ argv_array_push(&args, "--from-promisor");
+ if (options.no_dependents)
+ argv_array_push(&args, "--no-dependents");
argv_array_push(&args, url.buf);
for (i = 0; i < nr_heads; i++) {
diff --git a/revision.c b/revision.c
index a60628f..236d0d5 100644
--- a/revision.c
+++ b/revision.c
@@ -198,6 +198,8 @@ static struct object *get_reference(struct rev_info *revs, const char *name,
if (!object) {
if (revs->ignore_missing)
return object;
+ if (revs->exclude_promisor_objects && is_promisor_object(oid))
+ return NULL;
die("bad object %s", name);
}
object->flags |= flags;
@@ -799,9 +801,17 @@ static int add_parents_to_list(struct rev_info *revs, struct commit *commit,
for (parent = commit->parents; parent; parent = parent->next) {
struct commit *p = parent->item;
-
- if (parse_commit_gently(p, revs->ignore_missing_links) < 0)
+ int gently = revs->ignore_missing_links ||
+ revs->exclude_promisor_objects;
+ if (parse_commit_gently(p, gently) < 0) {
+ if (revs->exclude_promisor_objects &&
+ is_promisor_object(&p->object.oid)) {
+ if (revs->first_parent_only)
+ break;
+ continue;
+ }
return -1;
+ }
if (revs->show_source && !p->util)
p->util = commit->util;
p->object.flags |= left_flag;
@@ -2100,6 +2110,10 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
revs->limited = 1;
} else if (!strcmp(arg, "--ignore-missing")) {
revs->ignore_missing = 1;
+ } else if (!strcmp(arg, "--exclude-promisor-objects")) {
+ if (fetch_if_missing)
+ die("BUG: exclude_promisor_objects can only be used when fetch_if_missing is 0");
+ revs->exclude_promisor_objects = 1;
} else {
int opts = diff_opt_parse(&revs->diffopt, argv, argc, revs->prefix);
if (!opts)
@@ -2845,6 +2859,16 @@ void reset_revision_walk(void)
clear_object_flags(SEEN | ADDED | SHOWN);
}
+static int mark_uninteresting(const struct object_id *oid,
+ struct packed_git *pack,
+ uint32_t pos,
+ void *unused)
+{
+ struct object *o = parse_object(oid);
+ o->flags |= UNINTERESTING | SEEN;
+ return 0;
+}
+
int prepare_revision_walk(struct rev_info *revs)
{
int i;
@@ -2872,6 +2896,11 @@ int prepare_revision_walk(struct rev_info *revs)
(revs->limited && limiting_can_increase_treesame(revs)))
revs->treesame.name = "treesame";
+ if (revs->exclude_promisor_objects) {
+ for_each_packed_object(mark_uninteresting, NULL,
+ FOR_EACH_OBJECT_PROMISOR_ONLY);
+ }
+
if (revs->no_walk != REVISION_WALK_NO_WALK_UNSORTED)
commit_list_sort_by_date(&revs->commits);
if (revs->no_walk)
diff --git a/revision.h b/revision.h
index d7a35c8..3dee97b 100644
--- a/revision.h
+++ b/revision.h
@@ -122,7 +122,10 @@ struct rev_info {
ancestry_path:1,
first_parent_only:1,
line_level_traverse:1,
- tree_blobs_in_commit_order:1;
+ tree_blobs_in_commit_order:1,
+
+ /* for internal use only */
+ exclude_promisor_objects:1;
/* Diff flags */
unsigned int diff:1,
diff --git a/setup.c b/setup.c
index 8cc3418..c5d55dc 100644
--- a/setup.c
+++ b/setup.c
@@ -422,7 +422,11 @@ static int check_repo_format(const char *var, const char *value, void *vdata)
;
else if (!strcmp(ext, "preciousobjects"))
data->precious_objects = git_config_bool(var, value);
- else
+ else if (!strcmp(ext, "partialclone")) {
+ if (!value)
+ return config_error_nonbool(var);
+ data->partial_clone = xstrdup(value);
+ } else
string_list_append(&data->unknown_extensions, ext);
} else if (strcmp(var, "core.bare") == 0) {
data->is_bare = git_config_bool(var, value);
@@ -464,6 +468,7 @@ static int check_repository_format_gently(const char *gitdir, struct repository_
}
repository_format_precious_objects = candidate->precious_objects;
+ repository_format_partial_clone = candidate->partial_clone;
string_list_clear(&candidate->unknown_extensions, 0);
if (!has_common) {
if (candidate->is_bare != -1) {
diff --git a/sha1_file.c b/sha1_file.c
index 3da70ac..2e58f55 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -29,6 +29,7 @@
#include "mergesort.h"
#include "quote.h"
#include "packfile.h"
+#include "fetch-object.h"
const unsigned char null_sha1[GIT_MAX_RAWSZ];
const struct object_id null_oid;
@@ -1213,6 +1214,8 @@ static int sha1_loose_object_info(const unsigned char *sha1,
return (status < 0) ? status : 0;
}
+int fetch_if_missing = 1;
+
int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi, unsigned flags)
{
static struct object_info blank_oi = OBJECT_INFO_INIT;
@@ -1221,6 +1224,7 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi,
const unsigned char *real = (flags & OBJECT_INFO_LOOKUP_REPLACE) ?
lookup_replace_object(sha1) :
sha1;
+ int already_retried = 0;
if (is_null_sha1(real))
return -1;
@@ -1248,19 +1252,32 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi,
}
}
- if (!find_pack_entry(real, &e)) {
+ while (1) {
+ if (find_pack_entry(real, &e))
+ break;
+
/* Most likely it's a loose object. */
if (!sha1_loose_object_info(real, oi, flags))
return 0;
/* Not a loose object; someone else may have just packed it. */
- if (flags & OBJECT_INFO_QUICK) {
- return -1;
- } else {
- reprepare_packed_git();
- if (!find_pack_entry(real, &e))
- return -1;
+ reprepare_packed_git();
+ if (find_pack_entry(real, &e))
+ break;
+
+ /* Check if it is a missing object */
+ if (fetch_if_missing && repository_format_partial_clone &&
+ !already_retried) {
+ /*
+ * TODO Investigate haveing fetch_object() return
+ * TODO error/success and stopping the music here.
+ */
+ fetch_object(repository_format_partial_clone, real);
+ already_retried = 1;
+ continue;
}
+
+ return -1;
}
if (oi == &blank_oi)
@@ -1269,7 +1286,6 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi,
* information below, so return early.
*/
return 0;
-
rtype = packed_object_info(e.p, e.offset, oi);
if (rtype < 0) {
mark_bad_packed_object(e.p, real);
diff --git a/t/t0410-partial-clone.sh b/t/t0410-partial-clone.sh
new file mode 100755
index 0000000..cc18b75
--- /dev/null
+++ b/t/t0410-partial-clone.sh
@@ -0,0 +1,343 @@
+#!/bin/sh
+
+test_description='partial clone'
+
+. ./test-lib.sh
+
+delete_object () {
+ rm $1/.git/objects/$(echo $2 | sed -e 's|^..|&/|')
+}
+
+pack_as_from_promisor () {
+ HASH=$(git -C repo pack-objects .git/objects/pack/pack) &&
+ >repo/.git/objects/pack/pack-$HASH.promisor &&
+ echo $HASH
+}
+
+promise_and_delete () {
+ HASH=$(git -C repo rev-parse "$1") &&
+ git -C repo tag -a -m message my_annotated_tag "$HASH" &&
+ git -C repo rev-parse my_annotated_tag | pack_as_from_promisor &&
+ # tag -d prints a message to stdout, so redirect it
+ git -C repo tag -d my_annotated_tag >/dev/null &&
+ delete_object repo "$HASH"
+}
+
+test_expect_success 'missing reflog object, but promised by a commit, passes fsck' '
+ test_create_repo repo &&
+ test_commit -C repo my_commit &&
+
+ A=$(git -C repo commit-tree -m a HEAD^{tree}) &&
+ C=$(git -C repo commit-tree -m c -p $A HEAD^{tree}) &&
+
+ # Reference $A only from reflog, and delete it
+ git -C repo branch my_branch "$A" &&
+ git -C repo branch -f my_branch my_commit &&
+ delete_object repo "$A" &&
+
+ # State that we got $C, which refers to $A, from promisor
+ printf "$C\n" | pack_as_from_promisor &&
+
+ # Normally, it fails
+ test_must_fail git -C repo fsck &&
+
+ # But with the extension, it succeeds
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo fsck
+'
+
+test_expect_success 'missing reflog object, but promised by a tag, passes fsck' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo my_commit &&
+
+ A=$(git -C repo commit-tree -m a HEAD^{tree}) &&
+ git -C repo tag -a -m d my_tag_name $A &&
+ T=$(git -C repo rev-parse my_tag_name) &&
+ git -C repo tag -d my_tag_name &&
+
+ # Reference $A only from reflog, and delete it
+ git -C repo branch my_branch "$A" &&
+ git -C repo branch -f my_branch my_commit &&
+ delete_object repo "$A" &&
+
+ # State that we got $T, which refers to $A, from promisor
+ printf "$T\n" | pack_as_from_promisor &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo fsck
+'
+
+test_expect_success 'missing reflog object alone fails fsck, even with extension set' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo my_commit &&
+
+ A=$(git -C repo commit-tree -m a HEAD^{tree}) &&
+ B=$(git -C repo commit-tree -m b HEAD^{tree}) &&
+
+ # Reference $A only from reflog, and delete it
+ git -C repo branch my_branch "$A" &&
+ git -C repo branch -f my_branch my_commit &&
+ delete_object repo "$A" &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ test_must_fail git -C repo fsck
+'
+
+test_expect_success 'missing ref object, but promised, passes fsck' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo my_commit &&
+
+ A=$(git -C repo commit-tree -m a HEAD^{tree}) &&
+
+ # Reference $A only from ref
+ git -C repo branch my_branch "$A" &&
+ promise_and_delete "$A" &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo fsck
+'
+
+test_expect_success 'missing object, but promised, passes fsck' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo 1 &&
+ test_commit -C repo 2 &&
+ test_commit -C repo 3 &&
+ git -C repo tag -a annotated_tag -m "annotated tag" &&
+
+ C=$(git -C repo rev-parse 1) &&
+ T=$(git -C repo rev-parse 2^{tree}) &&
+ B=$(git hash-object repo/3.t) &&
+ AT=$(git -C repo rev-parse annotated_tag) &&
+
+ promise_and_delete "$C" &&
+ promise_and_delete "$T" &&
+ promise_and_delete "$B" &&
+ promise_and_delete "$AT" &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo fsck
+'
+
+test_expect_success 'missing CLI object, but promised, passes fsck' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo my_commit &&
+
+ A=$(git -C repo commit-tree -m a HEAD^{tree}) &&
+ promise_and_delete "$A" &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo fsck "$A"
+'
+
+test_expect_success 'fetching of missing objects' '
+ rm -rf repo &&
+ test_create_repo server &&
+ test_commit -C server foo &&
+ git -C server repack -a -d --write-bitmap-index &&
+
+ git clone "file://$(pwd)/server" repo &&
+ HASH=$(git -C repo rev-parse foo) &&
+ rm -rf repo/.git/objects/* &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "origin" &&
+ git -C repo cat-file -p "$HASH" &&
+
+ # Ensure that the .promisor file is written, and check that its
+ # associated packfile contains the object
+ ls repo/.git/objects/pack/pack-*.promisor >promisorlist &&
+ test_line_count = 1 promisorlist &&
+ IDX=$(cat promisorlist | sed "s/promisor$/idx/") &&
+ git verify-pack --verbose "$IDX" | grep "$HASH"
+'
+
+test_expect_success 'rev-list stops traversal at missing and promised commit' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo foo &&
+ test_commit -C repo bar &&
+
+ FOO=$(git -C repo rev-parse foo) &&
+ promise_and_delete "$FOO" &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo rev-list --exclude-promisor-objects --objects bar >out &&
+ grep $(git -C repo rev-parse bar) out &&
+ ! grep $FOO out
+'
+
+test_expect_success 'rev-list stops traversal at missing and promised tree' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo foo &&
+ mkdir repo/a_dir &&
+ echo something >repo/a_dir/something &&
+ git -C repo add a_dir/something &&
+ git -C repo commit -m bar &&
+
+ # foo^{tree} (tree referenced from commit)
+ TREE=$(git -C repo rev-parse foo^{tree}) &&
+
+ # a tree referenced by HEAD^{tree} (tree referenced from tree)
+ TREE2=$(git -C repo ls-tree HEAD^{tree} | grep " tree " | head -1 | cut -b13-52) &&
+
+ promise_and_delete "$TREE" &&
+ promise_and_delete "$TREE2" &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo rev-list --exclude-promisor-objects --objects HEAD >out &&
+ grep $(git -C repo rev-parse foo) out &&
+ ! grep $TREE out &&
+ grep $(git -C repo rev-parse HEAD) out &&
+ ! grep $TREE2 out
+'
+
+test_expect_success 'rev-list stops traversal at missing and promised blob' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ echo something >repo/something &&
+ git -C repo add something &&
+ git -C repo commit -m foo &&
+
+ BLOB=$(git -C repo hash-object -w something) &&
+ promise_and_delete "$BLOB" &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo rev-list --exclude-promisor-objects --objects HEAD >out &&
+ grep $(git -C repo rev-parse HEAD) out &&
+ ! grep $BLOB out
+'
+
+test_expect_success 'rev-list stops traversal at promisor commit, tree, and blob' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo foo &&
+ test_commit -C repo bar &&
+ test_commit -C repo baz &&
+
+ COMMIT=$(git -C repo rev-parse foo) &&
+ TREE=$(git -C repo rev-parse bar^{tree}) &&
+ BLOB=$(git hash-object repo/baz.t) &&
+ printf "%s\n%s\n%s\n" $COMMIT $TREE $BLOB | pack_as_from_promisor &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo rev-list --exclude-promisor-objects --objects HEAD >out &&
+ ! grep $COMMIT out &&
+ ! grep $TREE out &&
+ ! grep $BLOB out &&
+ grep $(git -C repo rev-parse bar) out # sanity check that some walking was done
+'
+
+test_expect_success 'rev-list accepts missing and promised objects on command line' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo foo &&
+ test_commit -C repo bar &&
+ test_commit -C repo baz &&
+
+ COMMIT=$(git -C repo rev-parse foo) &&
+ TREE=$(git -C repo rev-parse bar^{tree}) &&
+ BLOB=$(git hash-object repo/baz.t) &&
+
+ promise_and_delete $COMMIT &&
+ promise_and_delete $TREE &&
+ promise_and_delete $BLOB &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo rev-list --exclude-promisor-objects --objects "$COMMIT" "$TREE" "$BLOB"
+'
+
+test_expect_success 'gc does not repack promisor objects' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo my_commit &&
+
+ TREE_HASH=$(git -C repo rev-parse HEAD^{tree}) &&
+ HASH=$(printf "$TREE_HASH\n" | pack_as_from_promisor) &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo gc &&
+
+ # Ensure that the promisor packfile still exists, and remove it
+ test -e repo/.git/objects/pack/pack-$HASH.pack &&
+ rm repo/.git/objects/pack/pack-$HASH.* &&
+
+ # Ensure that the single other pack contains the commit, but not the tree
+ ls repo/.git/objects/pack/pack-*.pack >packlist &&
+ test_line_count = 1 packlist &&
+ git verify-pack repo/.git/objects/pack/pack-*.pack -v >out &&
+ grep "$(git -C repo rev-parse HEAD)" out &&
+ ! grep "$TREE_HASH" out
+'
+
+test_expect_success 'gc stops traversal when a missing but promised object is reached' '
+ rm -rf repo &&
+ test_create_repo repo &&
+ test_commit -C repo my_commit &&
+
+ TREE_HASH=$(git -C repo rev-parse HEAD^{tree}) &&
+ HASH=$(promise_and_delete $TREE_HASH) &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "arbitrary string" &&
+ git -C repo gc &&
+
+ # Ensure that the promisor packfile still exists, and remove it
+ test -e repo/.git/objects/pack/pack-$HASH.pack &&
+ rm repo/.git/objects/pack/pack-$HASH.* &&
+
+ # Ensure that the single other pack contains the commit, but not the tree
+ ls repo/.git/objects/pack/pack-*.pack >packlist &&
+ test_line_count = 1 packlist &&
+ git verify-pack repo/.git/objects/pack/pack-*.pack -v >out &&
+ grep "$(git -C repo rev-parse HEAD)" out &&
+ ! grep "$TREE_HASH" out
+'
+
+LIB_HTTPD_PORT=12345 # default port, 410, cannot be used as non-root
+. "$TEST_DIRECTORY"/lib-httpd.sh
+start_httpd
+
+test_expect_success 'fetching of missing objects from an HTTP server' '
+ rm -rf repo &&
+ SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
+ test_create_repo "$SERVER" &&
+ test_commit -C "$SERVER" foo &&
+ git -C "$SERVER" repack -a -d --write-bitmap-index &&
+
+ git clone $HTTPD_URL/smart/server repo &&
+ HASH=$(git -C repo rev-parse foo) &&
+ rm -rf repo/.git/objects/* &&
+
+ git -C repo config core.repositoryformatversion 1 &&
+ git -C repo config extensions.partialclone "origin" &&
+ git -C repo cat-file -p "$HASH" &&
+
+ # Ensure that the .promisor file is written, and check that its
+ # associated packfile contains the object
+ ls repo/.git/objects/pack/pack-*.promisor >promisorlist &&
+ test_line_count = 1 promisorlist &&
+ IDX=$(cat promisorlist | sed "s/promisor$/idx/") &&
+ git verify-pack --verbose "$IDX" | grep "$HASH"
+'
+
+stop_httpd
+
+test_done
diff --git a/transport.c b/transport.c
index fc80226..e82db77 100644
--- a/transport.c
+++ b/transport.c
@@ -161,6 +161,12 @@ static int set_git_option(struct git_transport_options *opts,
} else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
opts->deepen_relative = !!value;
return 0;
+ } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
+ opts->from_promisor = !!value;
+ return 0;
+ } else if (!strcmp(name, TRANS_OPT_NO_DEPENDENTS)) {
+ opts->no_dependents = !!value;
+ return 0;
}
return 1;
}
@@ -229,6 +235,8 @@ static int fetch_refs_via_pack(struct transport *transport,
data->options.check_self_contained_and_connected;
args.cloning = transport->cloning;
args.update_shallow = data->options.update_shallow;
+ args.from_promisor = data->options.from_promisor;
+ args.no_dependents = data->options.no_dependents;
if (!data->got_remote_heads) {
connect_setup(transport, 0);
diff --git a/transport.h b/transport.h
index 731c78b..8c3430a 100644
--- a/transport.h
+++ b/transport.h
@@ -15,6 +15,8 @@ struct git_transport_options {
unsigned self_contained_and_connected : 1;
unsigned update_shallow : 1;
unsigned deepen_relative : 1;
+ unsigned from_promisor : 1;
+ unsigned no_dependents : 1;
int depth;
const char *deepen_since;
const struct string_list *deepen_not;
@@ -159,6 +161,15 @@ void transport_check_allowed(const char *type);
/* Send push certificates */
#define TRANS_OPT_PUSH_CERT "pushcert"
+/* Indicate that these objects are being fetched by a promisor */
+#define TRANS_OPT_FROM_PROMISOR "from-promisor"
+
+/*
+ * Indicate that only the objects wanted need to be fetched, not their
+ * dependents
+ */
+#define TRANS_OPT_NO_DEPENDENTS "no-dependents"
+
/**
* Returns 0 if the option was used, non-zero otherwise. Prints a
* message to stderr if the option is not used.