In upload-pack-2 we send each capability in its own packet.
By reusing the advertise_capabilities and eventually setting it to
NULL we will be able to reuse the methods for refs advertisement.
Signed-off-by: Stefan Beller <sbel...@google.com>
---
.gitignore | 1 +
Makefile | 2 ++
upload-pack-2.c | 1 +
upload-pack.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
4 files changed, 78 insertions(+), 3 deletions(-)
create mode 120000 upload-pack-2.c
diff --git a/.gitignore b/.gitignore
index a052419..a3c8ab9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -165,6 +165,7 @@
/git-update-server-info
/git-upload-archive
/git-upload-pack
+/git-upload-pack-2
/git-var
/git-verify-commit
/git-verify-pack
diff --git a/Makefile b/Makefile
index 25a453b..0f3ee41 100644
--- a/Makefile
+++ b/Makefile
@@ -560,6 +560,7 @@ PROGRAM_OBJS += sh-i18n--envsubst.o
PROGRAM_OBJS += shell.o
PROGRAM_OBJS += show-index.o
PROGRAM_OBJS += upload-pack.o
+PROGRAM_OBJS += upload-pack-2.o
PROGRAM_OBJS += remote-testsvn.o
# Binary suffix, set to .exe for Windows builds
@@ -625,6 +626,7 @@ OTHER_PROGRAMS = git$X
# what test wrappers are needed and 'install' will install, in bindir
BINDIR_PROGRAMS_NEED_X += git
BINDIR_PROGRAMS_NEED_X += git-upload-pack
+BINDIR_PROGRAMS_NEED_X += git-upload-pack-2
BINDIR_PROGRAMS_NEED_X += git-receive-pack
BINDIR_PROGRAMS_NEED_X += git-upload-archive
BINDIR_PROGRAMS_NEED_X += git-shell
diff --git a/upload-pack-2.c b/upload-pack-2.c
new file mode 120000
index 0000000..e30a871
--- /dev/null
+++ b/upload-pack-2.c
@@ -0,0 +1 @@
+upload-pack.c
\ No newline at end of file
diff --git a/upload-pack.c b/upload-pack.c
index a5f75b7..84f9ee3 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -716,10 +716,47 @@ static void format_symref_info(struct strbuf *buf, struct
string_list *symref)
strbuf_addf(buf, " symref=%s:%s", item->string, (char
*)item->util);
}
-static const char *advertise_capabilities = "multi_ack thin-pack side-band"
+static char *advertise_capabilities = "multi_ack thin-pack side-band"
" side-band-64k ofs-delta shallow no-progress"
" include-tag multi_ack_detailed";
+/*
+ * Reads the next capability and puts it into dst as a null terminated string.
+ * Returns true if more capabilities can be read.
+ * */
+static int next_capability(char *dst)
+{
+ int len = 0;
+ if (!*advertise_capabilities) {
+ /* make sure to not advertise capabilities afterwards */
+ advertise_capabilities = NULL;
+ return 0;
+ }
+
+ while (advertise_capabilities[len] != '\0' &&
+ advertise_capabilities[len] != ' ')
+ len ++;
+ strncpy(dst, advertise_capabilities, len);
+ dst[len] = '\0';
+
+ advertise_capabilities += len;
+ if (*advertise_capabilities == ' ')
+ advertise_capabilities++;
+
+ return 1;
+}
+
+static void send_capabilities(void)
+{
+ char buf[100];
+
+ while (next_capability(buf))
+ packet_write(1, "capability:%s\n", buf);
+
+ packet_write(1, "agent:%s\n", git_user_agent_sanitized());
+ packet_flush(1);
+}
+
static int send_ref(const char *refname, const unsigned char *sha1, int flag,
void *cb_data)
{
@@ -794,6 +831,28 @@ static void upload_pack(void)
}
}
+static void receive_capabilities(void)
+{
+ int done = 0;
+ while (1) {
+ char *line = packet_read_line(0, NULL);
+ if (!line)
+ break;
+ if (starts_with(line, "capability:"))
+ parse_features(line + strlen("capability:"));
+ }
+}
+
+static void upload_pack_version_2(void)
+{
+ send_capabilities();
+ receive_capabilities();
+
+ /* The rest of the protocol stays the same, capabilities advertising
+ is disabled though. */
+ upload_pack();
+}
+
static int upload_pack_config(const char *var, const char *value, void *unused)
{
if (!strcmp("uploadpack.allowtipsha1inwant", var))
@@ -806,16 +865,24 @@ static int upload_pack_config(const char *var, const char
*value, void *unused)
return parse_hide_refs_config(var, value, "uploadpack");
}
+static int endswith(const char *teststring, const char *ending)
+{
+ int slen = strlen(teststring);
+ int elen = strlen(ending);
+ return !strcmp(teststring + slen - elen, ending);
+}
+
int main(int argc, char **argv)
{
char *dir;
+ const char *cmd;
int i;
int strict = 0;
git_setup_gettext();
packet_trace_identity("upload-pack");
- git_extract_argv0_path(argv[0]);
+ cmd = git_extract_argv0_path(argv[0]);
check_replace_refs = 0;
for (i = 1; i < argc; i++) {
@@ -857,6 +924,10 @@ int main(int argc, char **argv)
die("'%s' does not appear to be a git repository", dir);
git_config(upload_pack_config, NULL);
- upload_pack();
+
+ if (endswith(cmd, "-2"))
+ upload_pack_version_2();
+ else
+ upload_pack();
return 0;
}
--
2.4.1.345.gab207b6.dirty
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