Teach fetch to support excluding large blobs through a blob-max-bytes
parameter. This is only allowed for the remote configured in
extensions.partialclone.
Signed-off-by: Jonathan Tan <jonathantanmy@xxxxxxxxxx>
---
builtin/fetch.c | 22 ++++++++++++++++++++--
connected.c | 1 +
remote-curl.c | 7 +++++++
t/t5500-fetch-pack.sh | 36 ++++++++++++++++++++++++++++++++++++
transport-helper.c | 4 ++++
transport.c | 10 ++++++++++
transport.h | 4 ++++
7 files changed, 82 insertions(+), 2 deletions(-)
diff --git a/builtin/fetch.c b/builtin/fetch.c
index 1b1f03923..07beaf5b5 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -55,6 +55,7 @@ static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
static int shown_url = 0;
static int refmap_alloc, refmap_nr;
static const char **refmap_array;
+static const char *blob_max_bytes;
static int git_fetch_config(const char *k, const char *v, void *cb)
{
@@ -160,6 +161,8 @@ static struct option builtin_fetch_options[] = {
TRANSPORT_FAMILY_IPV4),
OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
TRANSPORT_FAMILY_IPV6),
+ OPT_STRING(0, "blob-max-bytes", &blob_max_bytes, N_("bytes"),
+ N_("do not fetch blobs above this size")),
OPT_END()
};
@@ -1044,6 +1047,10 @@ static struct transport *prepare_transport(struct remote *remote, int deepen)
set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
if (update_shallow)
set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
+ if (blob_max_bytes) {
+ set_option(transport, TRANS_OPT_BLOB_MAX_BYTES, blob_max_bytes);
+ set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
+ }
return transport;
}
@@ -1328,6 +1335,8 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
packet_trace_identity("fetch");
+ fetch_if_missing = 0;
+
/* Record the command line for the reflog */
strbuf_addstr(&default_rla, "fetch");
for (i = 1; i < argc; i++)
@@ -1361,6 +1370,9 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
if (depth || deepen_since || deepen_not.nr)
deepen = 1;
+ if (blob_max_bytes && !repository_format_partial_clone)
+ die("--blob-max-bytes can only be used when extensions.partialClone is set");
+
if (all) {
if (argc == 1)
die(_("fetch --all does not take a repository argument"));
@@ -1390,10 +1402,16 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
}
}
- if (remote)
+ if (remote) {
+ if (blob_max_bytes &&
+ strcmp(remote->name, repository_format_partial_clone))
+ die(_("--blob-max-bytes can only be used with the remote configured in core.partialClone"));
result = fetch_one(remote, argc, argv);
- else
+ } else {
+ if (blob_max_bytes)
+ die(_("--blob-max-bytes can only be used with the remote configured in core.partialClone"));
result = fetch_multiple(&list);
+ }
if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
struct argv_array options = ARGV_ARRAY_INIT;
diff --git a/connected.c b/connected.c
index f416b0505..a51c01d63 100644
--- a/connected.c
+++ b/connected.c
@@ -56,6 +56,7 @@ int check_connected(sha1_iterate_fn fn, void *cb_data,
argv_array_push(&rev_list.args,"rev-list");
argv_array_push(&rev_list.args, "--objects");
argv_array_push(&rev_list.args, "--stdin");
+ argv_array_push(&rev_list.args, "--exclude-promisor-objects");
argv_array_push(&rev_list.args, "--not");
argv_array_push(&rev_list.args, "--all");
argv_array_push(&rev_list.args, "--quiet");
diff --git a/remote-curl.c b/remote-curl.c
index 34a81b8d3..18fd184c1 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -24,6 +24,7 @@ struct options {
char *deepen_since;
struct string_list deepen_not;
struct string_list push_options;
+ char *blob_max_bytes;
unsigned progress : 1,
check_self_contained_and_connected : 1,
cloning : 1,
@@ -165,6 +166,9 @@ static int set_option(const char *name, const char *value)
} else if (!strcmp(name, "no-haves")) {
options.no_haves = 1;
return 0;
+ } else if (!strcmp(name, "blob-max-bytes")) {
+ options.blob_max_bytes = xstrdup(value);
+ return 0;
} else {
return 1 /* unsupported */;
}
@@ -834,6 +838,9 @@ static int fetch_git(struct discovery *heads,
argv_array_push(&args, "--from-promisor");
if (options.no_haves)
argv_array_push(&args, "--no-haves");
+ if (options.blob_max_bytes)
+ argv_array_pushf(&args, "--blob-max-bytes=%s",
+ options.blob_max_bytes);
argv_array_push(&args, url.buf);
for (i = 0; i < nr_heads; i++) {
diff --git a/t/t5500-fetch-pack.sh b/t/t5500-fetch-pack.sh
index 62e384230..b2682862f 100755
--- a/t/t5500-fetch-pack.sh
+++ b/t/t5500-fetch-pack.sh
@@ -782,4 +782,40 @@ test_expect_success '--blob-max-bytes has no effect if support for it is not adv
test_i18ngrep "blob-max-bytes not recognized by server" err
'
+fetch_blob_max_bytes () {
+ SERVER="$1"
+ URL="$2"
+
+ rm -rf "$SERVER" client &&
+ test_create_repo "$SERVER" &&
+ test_commit -C "$SERVER" one &&
+ test_config -C "$SERVER" uploadpack.advertiseblobmaxbytes 1 &&
+
+ git clone "$URL" client &&
+ test_config -C client extensions.partialclone origin &&
+
+ test_commit -C "$SERVER" two &&
+
+ git -C client fetch --blob-max-bytes=0 origin HEAD:somewhere &&
+
+ # Ensure that commit is fetched, but blob is not
+ test_config -C client extensions.partialclone "arbitrary string" &&
+ git -C client cat-file -e $(git -C "$SERVER" rev-parse two) &&
+ test_must_fail git -C client cat-file -e $(git hash-object "$SERVER/two.t")
+}
+
+test_expect_success 'fetch with --blob-max-bytes' '
+ fetch_blob_max_bytes server server
+'
+
+. "$TEST_DIRECTORY"/lib-httpd.sh
+start_httpd
+
+test_expect_success 'fetch with --blob-max-bytes and HTTP' '
+ fetch_blob_max_bytes "$HTTPD_DOCUMENT_ROOT_PATH/server" "$HTTPD_URL/smart/server"
+'
+
+stop_httpd
+
+
test_done
diff --git a/transport-helper.c b/transport-helper.c
index 42b960ff8..9c1874b70 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -672,6 +672,10 @@ static int fetch(struct transport *transport,
if (data->transport_options.update_shallow)
set_helper_option(transport, "update-shallow", "true");
+ if (data->transport_options.blob_max_bytes)
+ set_helper_option(transport, "blob-max-bytes",
+ data->transport_options.blob_max_bytes);
+
if (data->fetch)
return fetch_with_fetch(transport, nr_heads, to_fetch);
diff --git a/transport.c b/transport.c
index fb46e33bf..6408af19e 100644
--- a/transport.c
+++ b/transport.c
@@ -167,6 +167,9 @@ static int set_git_option(struct git_transport_options *opts,
} else if (!strcmp(name, TRANS_OPT_NO_HAVES)) {
opts->no_haves = !!value;
return 0;
+ } else if (!strcmp(name, TRANS_OPT_BLOB_MAX_BYTES)) {
+ opts->blob_max_bytes = value;
+ return 0;
}
return 1;
}
@@ -237,6 +240,13 @@ static int fetch_refs_via_pack(struct transport *transport,
args.update_shallow = data->options.update_shallow;
args.from_promisor = data->options.from_promisor;
args.no_haves = data->options.no_haves;
+ if (data->options.blob_max_bytes) {
+ unsigned long *ptr = xmalloc(sizeof(*ptr));
+ if (!git_parse_ulong(data->options.blob_max_bytes, ptr))
+ die("Invalid blob-max-bytes value: %s",
+ data->options.blob_max_bytes);
+ args.blob_max_bytes = ptr;
+ }
if (!data->got_remote_heads) {
connect_setup(transport, 0);
diff --git a/transport.h b/transport.h
index 67428f6df..79d4442b1 100644
--- a/transport.h
+++ b/transport.h
@@ -23,6 +23,7 @@ struct git_transport_options {
const char *uploadpack;
const char *receivepack;
struct push_cas_option *cas;
+ const char *blob_max_bytes;
};
enum transport_family {
@@ -218,6 +219,9 @@ void transport_check_allowed(const char *type);
/* Do not send "have" lines */
#define TRANS_OPT_NO_HAVES "no-haves"
+/* Exclude blobs above a certain size */
+#define TRANS_OPT_BLOB_MAX_BYTES "blob-max-bytes"
+
/**
* Returns 0 if the option was used, non-zero otherwise. Prints a
* message to stderr if the option is not used.
--
2.14.2.822.g60be5d43e6-goog
