Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
Documentation/technical/pack-protocol.txt | 4 +-
builtin/receive-pack.c | 78 +++++++++++++++++++++++++++----
builtin/send-pack.c | 2 +-
send-pack.c | 3 ++
t/t5537-push-shallow.sh (new +x) | 70 +++++++++++++++++++++++++++
5 files changed, 146 insertions(+), 11 deletions(-)
create mode 100755 t/t5537-push-shallow.sh
diff --git a/Documentation/technical/pack-protocol.txt b/Documentation/technical/pack-protocol.txt
index eb8edd1..c73b62f 100644
--- a/Documentation/technical/pack-protocol.txt
+++ b/Documentation/technical/pack-protocol.txt
@@ -464,7 +464,9 @@ contain all the objects that the server will need to complete the new
references.
----
- update-request = command-list [pack-file]
+ update-request = *shallow command-list [pack-file]
+
+ shallow = PKT-LINE("shallow" SP obj-id)
command-list = PKT-LINE(command NUL capability-list LF)
*PKT-LINE(command LF)
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 8927ddf..b9de2e8 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -44,6 +44,7 @@ static int fix_thin = 1;
static const char *head_name;
static void *head_name_to_free;
static int sent_capabilities;
+static const char *alt_shallow_file;
static enum deny_action parse_deny_action(const char *var, const char *value)
{
@@ -190,6 +191,7 @@ struct command {
const char *error_string;
unsigned int skip_update:1,
did_not_exist:1;
+ int index;
unsigned char old_sha1[20];
unsigned char new_sha1[20];
char ref_name[FLEX_ARRAY]; /* more */
@@ -688,7 +690,7 @@ static int iterate_receive_command_list(void *cb_data, unsigned char sha1[20])
struct command *cmd = *cmd_list;
while (cmd) {
- if (!is_null_sha1(cmd->new_sha1)) {
+ if (!is_null_sha1(cmd->new_sha1) && !cmd->skip_update) {
hashcpy(sha1, cmd->new_sha1);
*cmd_list = cmd->next;
return 0;
@@ -755,7 +757,7 @@ static void execute_commands(struct command *commands, const char *unpacker_erro
}
}
-static struct command *read_head_info(void)
+static struct command *read_head_info(struct sha1_array *shallow)
{
struct command *commands = NULL;
struct command **p = &commands;
@@ -769,6 +771,14 @@ static struct command *read_head_info(void)
line = packet_read_line(0, &len);
if (!line)
break;
+
+ if (len == 48 && !prefixcmp(line, "shallow ")) {
+ if (get_sha1_hex(line + 8, old_sha1))
+ die("protocol error: expected shallow sha, got '%s'", line + 8);
+ sha1_array_append(shallow, old_sha1);
+ continue;
+ }
+
if (len < 83 ||
line[40] != ' ' ||
line[81] != ' ' ||
@@ -820,7 +830,7 @@ static const char *parse_pack_header(struct pack_header *hdr)
static const char *pack_lockfile;
-static const char *unpack(int err_fd)
+static const char *unpack(int err_fd, struct shallow_info *si)
{
struct pack_header hdr;
struct argv_array av = ARGV_ARRAY_INIT;
@@ -844,6 +854,11 @@ static const char *unpack(int err_fd)
"--pack_header=%"PRIu32",%"PRIu32,
ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries));
+ if (si->nr_ours || si->nr_theirs) {
+ alt_shallow_file = setup_temporary_shallow(si->shallow);
+ argv_array_pushl(&av, "--shallow-file", alt_shallow_file, NULL);
+ }
+
memset(&child, 0, sizeof(child));
if (ntohl(hdr.hdr_entries) < unpack_limit) {
argv_array_pushl(&av, "unpack-objects", hdr_arg, NULL);
@@ -889,13 +904,13 @@ static const char *unpack(int err_fd)
return NULL;
}
-static const char *unpack_with_sideband(void)
+static const char *unpack_with_sideband(struct shallow_info *si)
{
struct async muxer;
const char *ret;
if (!use_sideband)
- return unpack(0);
+ return unpack(0, si);
memset(&muxer, 0, sizeof(muxer));
muxer.proc = copy_to_sideband;
@@ -903,12 +918,48 @@ static const char *unpack_with_sideband(void)
if (start_async(&muxer))
return NULL;
- ret = unpack(muxer.in);
+ ret = unpack(muxer.in, si);
finish_async(&muxer);
return ret;
}
+static void update_shallow_info(struct command *commands,
+ struct shallow_info *si,
+ struct sha1_array *ref)
+{
+ struct command *cmd;
+ int *ref_status;
+ remove_nonexistent_theirs_shallow(si);
+ /* XXX remove_nonexistent_ours_in_pack() */
+ if (!si->nr_ours && !si->nr_theirs)
+ return;
+
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ if (is_null_sha1(cmd->new_sha1))
+ continue;
+ sha1_array_append(ref, cmd->new_sha1);
+ cmd->index = ref->nr - 1;
+ }
+ si->ref = ref;
+
+ ref_status = xmalloc(sizeof(*ref_status) * ref->nr);
+ assign_shallow_commits_to_refs(si, NULL, ref_status);
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ if (is_null_sha1(cmd->new_sha1))
+ continue;
+ if (ref_status[cmd->index]) {
+ cmd->error_string = "shallow update not allowed";
+ cmd->skip_update = 1;
+ }
+ }
+ if (alt_shallow_file && *alt_shallow_file) {
+ unlink(alt_shallow_file);
+ alt_shallow_file = NULL;
+ }
+ free(ref_status);
+}
+
static void report(struct command *commands, const char *unpack_status)
{
struct command *cmd;
@@ -950,6 +1001,9 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
int i;
char *dir = NULL;
struct command *commands;
+ struct sha1_array shallow = SHA1_ARRAY_INIT;
+ struct sha1_array ref = SHA1_ARRAY_INIT;
+ struct shallow_info si;
packet_trace_identity("receive-pack");
@@ -1006,11 +1060,14 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
if (advertise_refs)
return 0;
- if ((commands = read_head_info()) != NULL) {
+ if ((commands = read_head_info(&shallow)) != NULL) {
const char *unpack_status = NULL;
- if (!delete_only(commands))
- unpack_status = unpack_with_sideband();
+ prepare_shallow_info(&si, &shallow);
+ if (!delete_only(commands)) {
+ unpack_status = unpack_with_sideband(&si);
+ update_shallow_info(commands, &si, &ref);
+ }
execute_commands(commands, unpack_status);
if (pack_lockfile)
unlink_or_warn(pack_lockfile);
@@ -1027,8 +1084,11 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
}
if (auto_update_server_info)
update_server_info(0);
+ clear_shallow_info(&si);
}
if (use_sideband)
packet_flush(1);
+ sha1_array_clear(&shallow);
+ sha1_array_clear(&ref);
return 0;
}
diff --git a/builtin/send-pack.c b/builtin/send-pack.c
index 62cc4d3..ea2ab28 100644
--- a/builtin/send-pack.c
+++ b/builtin/send-pack.c
@@ -208,7 +208,7 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
(send_all && args.send_mirror))
usage(send_pack_usage);
- if (is_repository_shallow())
+ if (is_repository_shallow() && args.stateless_rpc)
die("attempt to push from a shallow repository");
if (remote_name) {
diff --git a/send-pack.c b/send-pack.c
index 14005fa..cd536b4 100644
--- a/send-pack.c
+++ b/send-pack.c
@@ -214,6 +214,9 @@ int send_pack(struct send_pack_args *args,
return 0;
}
+ if (!args->dry_run)
+ advertise_shallow_grafts(out);
+
/*
* Finally, tell the other end!
*/
diff --git a/t/t5537-push-shallow.sh b/t/t5537-push-shallow.sh
new file mode 100755
index 0000000..650c31a
--- /dev/null
+++ b/t/t5537-push-shallow.sh
@@ -0,0 +1,70 @@
+#!/bin/sh
+
+test_description='push from/to a shallow clone'
+
+. ./test-lib.sh
+
+commit() {
+ echo "$1" >tracked &&
+ git add tracked &&
+ git commit -m "$1"
+}
+
+test_expect_success 'setup' '
+ git config --global transfer.fsckObjects true &&
+ commit 1 &&
+ commit 2 &&
+ commit 3 &&
+ commit 4 &&
+ (
+ git init full-abc &&
+ cd full-abc &&
+ commit a &&
+ commit b &&
+ commit c
+ ) &&
+ git clone --no-local --depth=2 .git shallow &&
+ git --git-dir=shallow/.git log --format=%s >actual &&
+ cat <<EOF >expect &&
+4
+3
+EOF
+ test_cmp expect actual &&
+ git clone --no-local --depth=2 full-abc/.git shallow2 &&
+ git --git-dir=shallow2/.git log --format=%s >actual &&
+ cat <<EOF >expect &&
+c
+b
+EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'push from shallow clone' '
+ (
+ cd shallow &&
+ commit 5 &&
+ git push ../.git +master:refs/remotes/shallow/master
+ ) &&
+ git log --format=%s shallow/master >actual &&
+ git fsck &&
+ cat <<EOF >expect &&
+5
+4
+3
+2
+1
+EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'push from shallow clone, with grafted roots' '
+ (
+ cd shallow2 &&
+ test_must_fail git push ../.git +master:refs/remotes/shallow2/master 2>err &&
+ grep "shallow2/master.*shallow update not allowed" err
+ ) &&
+ test_must_fail git rev-parse shallow2/master &&
+ git fsck
+'
+
+test_done
--
1.8.5.1.25.g8667982
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