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-rw-r--r--upload-pack.c134
1 files changed, 94 insertions, 40 deletions
diff --git a/upload-pack.c b/upload-pack.c
index 80a5d09..c5eff21 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -1,12 +1,18 @@
#include "cache.h"
#include "refs.h"
#include "pkt-line.h"
+#include "tag.h"
+#include "object.h"
+#include "commit.h"
static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=nn] <dir>";
-#define MAX_HAS (16)
-#define MAX_NEEDS (256)
-static int nr_has = 0, nr_needs = 0;
+#define THEY_HAVE (1U << 0)
+#define OUR_REF (1U << 1)
+#define WANTED (1U << 2)
+#define MAX_HAS 256
+#define MAX_NEEDS 256
+static int nr_has = 0, nr_needs = 0, multi_ack = 0, nr_our_refs = 0;
static unsigned char has_sha1[MAX_HAS][20];
static unsigned char needs_sha1[MAX_NEEDS][20];
static unsigned int timeout = 0;
@@ -27,6 +33,7 @@ static void create_pack_file(void)
{
int fd[2];
pid_t pid;
+ int create_full_pack = (nr_our_refs == nr_needs && !nr_has);
if (pipe(fd) < 0)
die("git-upload-pack: unable to create pipe");
@@ -41,8 +48,8 @@ static void create_pack_file(void)
char *buf;
char **p;
- if (MAX_NEEDS <= nr_needs)
- args = nr_has + 10;
+ if (create_full_pack)
+ args = 10;
else
args = nr_has + nr_needs + 5;
argv = xmalloc(args * sizeof(char *));
@@ -55,7 +62,7 @@ static void create_pack_file(void)
close(fd[1]);
*p++ = "git-rev-list";
*p++ = "--objects";
- if (MAX_NEEDS <= nr_needs)
+ if (create_full_pack || MAX_NEEDS <= nr_needs)
*p++ = "--all";
else {
for (i = 0; i < nr_needs; i++) {
@@ -64,12 +71,13 @@ static void create_pack_file(void)
buf += 41;
}
}
- for (i = 0; i < nr_has; i++) {
- *p++ = buf;
- *buf++ = '^';
- memcpy(buf, sha1_to_hex(has_sha1[i]), 41);
- buf += 41;
- }
+ if (!create_full_pack)
+ for (i = 0; i < nr_has; i++) {
+ *p++ = buf;
+ *buf++ = '^';
+ memcpy(buf, sha1_to_hex(has_sha1[i]), 41);
+ buf += 41;
+ }
*p++ = NULL;
execvp("git-rev-list", argv);
die("git-upload-pack: unable to exec git-rev-list");
@@ -83,15 +91,27 @@ static void create_pack_file(void)
static int got_sha1(char *hex, unsigned char *sha1)
{
- int nr;
if (get_sha1_hex(hex, sha1))
die("git-upload-pack: expected SHA1 object, got '%s'", hex);
if (!has_sha1_file(sha1))
return 0;
- nr = nr_has;
- if (nr < MAX_HAS) {
- memcpy(has_sha1[nr], sha1, 20);
- nr_has = nr+1;
+ if (nr_has < MAX_HAS) {
+ struct object *o = lookup_object(sha1);
+ if (!(o && o->parsed))
+ o = parse_object(sha1);
+ if (!o)
+ die("oops (%s)", sha1_to_hex(sha1));
+ if (o->type == commit_type) {
+ struct commit_list *parents;
+ if (o->flags & THEY_HAVE)
+ return 0;
+ o->flags |= THEY_HAVE;
+ for (parents = ((struct commit*)o)->parents;
+ parents;
+ parents = parents->next)
+ parents->item->object.flags |= THEY_HAVE;
+ }
+ memcpy(has_sha1[nr_has++], sha1, 20);
}
return 1;
}
@@ -99,47 +119,47 @@ static int got_sha1(char *hex, unsigned char *sha1)
static int get_common_commits(void)
{
static char line[1000];
- unsigned char sha1[20];
+ unsigned char sha1[20], last_sha1[20];
int len;
+ track_object_refs = 0;
+ save_commit_buffer = 0;
+
for(;;) {
len = packet_read_line(0, line, sizeof(line));
reset_timeout();
if (!len) {
- packet_write(1, "NAK\n");
+ if (nr_has == 0 || multi_ack)
+ packet_write(1, "NAK\n");
continue;
}
len = strip(line, len);
if (!strncmp(line, "have ", 5)) {
- if (got_sha1(line+5, sha1)) {
- packet_write(1, "ACK %s\n", sha1_to_hex(sha1));
- break;
+ if (got_sha1(line+5, sha1) &&
+ (multi_ack || nr_has == 1)) {
+ if (nr_has >= MAX_HAS)
+ multi_ack = 0;
+ packet_write(1, "ACK %s%s\n",
+ sha1_to_hex(sha1),
+ multi_ack ? " continue" : "");
+ if (multi_ack)
+ memcpy(last_sha1, sha1, 20);
}
continue;
}
if (!strcmp(line, "done")) {
+ if (nr_has > 0) {
+ if (multi_ack)
+ packet_write(1, "ACK %s\n",
+ sha1_to_hex(last_sha1));
+ return 0;
+ }
packet_write(1, "NAK\n");
return -1;
}
die("git-upload-pack: expected SHA1 list, got '%s'", line);
}
-
- for (;;) {
- len = packet_read_line(0, line, sizeof(line));
- reset_timeout();
- if (!len)
- continue;
- len = strip(line, len);
- if (!strncmp(line, "have ", 5)) {
- got_sha1(line+5, sha1);
- continue;
- }
- if (!strcmp(line, "done"))
- break;
- die("git-upload-pack: expected SHA1 list, got '%s'", line);
- }
- return 0;
}
static int receive_needs(void)
@@ -149,6 +169,7 @@ static int receive_needs(void)
needs = 0;
for (;;) {
+ struct object *o;
unsigned char dummy[20], *sha1_buf;
len = packet_read_line(0, line, sizeof(line));
reset_timeout();
@@ -168,13 +189,46 @@ static int receive_needs(void)
if (strncmp("want ", line, 5) || get_sha1_hex(line+5, sha1_buf))
die("git-upload-pack: protocol error, "
"expected to get sha, not '%s'", line);
- needs++;
+ if (strstr(line+45, "multi_ack"))
+ multi_ack = 1;
+
+ /* We have sent all our refs already, and the other end
+ * should have chosen out of them; otherwise they are
+ * asking for nonsense.
+ *
+ * Hmph. We may later want to allow "want" line that
+ * asks for something like "master~10" (symbolic)...
+ * would it make sense? I don't know.
+ */
+ o = lookup_object(sha1_buf);
+ if (!o || !(o->flags & OUR_REF))
+ die("git-upload-pack: not our ref %s", line+5);
+ if (!(o->flags & WANTED)) {
+ o->flags |= WANTED;
+ needs++;
+ }
}
}
static int send_ref(const char *refname, const unsigned char *sha1)
{
- packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
+ static char *capabilities = "multi_ack";
+ struct object *o = parse_object(sha1);
+
+ if (capabilities)
+ packet_write(1, "%s %s%c%s\n", sha1_to_hex(sha1), refname,
+ 0, capabilities);
+ else
+ packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
+ capabilities = NULL;
+ if (!(o->flags & OUR_REF)) {
+ o->flags |= OUR_REF;
+ nr_our_refs++;
+ }
+ if (o->type == tag_type) {
+ o = deref_tag(o);
+ packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname);
+ }
return 0;
}
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