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authorLinus Torvalds <torvalds@g5.osdl.org>2005-07-08 20:58:40 (GMT)
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-08 20:58:40 (GMT)
commit584c6cc91a61ec615419452ca540041be6ba9f38 (patch)
tree63f9306b430114929a9f4030486bc659ef38c66c /send-pack.c
parent99a0a6e09f2c9737d1155f25e8cd4c3bc512a8ea (diff)
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Teach 'git-send-pack' to send new branches and tags.
The protocol always supported it, but send-pack didn't actually know how to tell the other side about a new branch/tag. NOTE! You'll have to name it explicitly on the command line: if you don't name any branches, git-send-pack will default to the branches that already exist.
Diffstat (limited to 'send-pack.c')
-rw-r--r--send-pack.c128
1 files changed, 111 insertions, 17 deletions
diff --git a/send-pack.c b/send-pack.c
index 7287c3d..4c6adab 100644
--- a/send-pack.c
+++ b/send-pack.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "refs.h"
#include "pkt-line.h"
static const char send_pack_usage[] = "git-send-pack [--exec=other] destination [heads]*";
@@ -11,6 +12,17 @@ struct ref {
char name[0];
};
+static int is_zero_sha1(const unsigned char *sha1)
+{
+ int i;
+
+ for (i = 0; i < 20; i++) {
+ if (*sha1++)
+ return 0;
+ }
+ return 1;
+}
+
static void exec_pack_objects(void)
{
static char *args[] = {
@@ -33,11 +45,15 @@ static void exec_rev_list(struct ref *refs)
char *buf = malloc(100);
if (i > 900)
die("git-rev-list environment overflow");
- args[i++] = buf;
- snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
- buf += 50;
- args[i++] = buf;
- snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
+ if (!is_zero_sha1(refs->old_sha1)) {
+ args[i++] = buf;
+ snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
+ buf += 50;
+ }
+ if (!is_zero_sha1(refs->new_sha1)) {
+ args[i++] = buf;
+ snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
+ }
refs = refs->next;
}
args[i] = NULL;
@@ -104,14 +120,54 @@ static int read_ref(const char *ref, unsigned char *sha1)
return ret;
}
+static int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
+{
+ if (!has_sha1_file(old_sha1))
+ return 0;
+ /*
+ * FIXME! It is not correct to say that the new one is newer
+ * just because we don't have the old one!
+ *
+ * We should really see if we can reach the old_sha1 commit
+ * from the new_sha1 one.
+ */
+ return 1;
+}
+
+static int local_ref_nr_match;
+static char **local_ref_match;
+static struct ref **local_ref_list;
+
+static int try_to_match(const char *refname, const unsigned char *sha1)
+{
+ struct ref *ref;
+ int len;
+
+ if (!path_match(refname, local_ref_nr_match, local_ref_match))
+ return 0;
+
+ len = strlen(refname)+1;
+ ref = xmalloc(sizeof(*ref) + len);
+ memset(ref->old_sha1, 0, 20);
+ memcpy(ref->new_sha1, sha1, 20);
+ memcpy(ref->name, refname, len);
+ ref->next = NULL;
+ *local_ref_list = ref;
+ local_ref_list = &ref->next;
+ return 0;
+}
+
static int send_pack(int in, int out, int nr_match, char **match)
{
struct ref *ref_list = NULL, **last_ref = &ref_list;
struct ref *ref;
+ int new_refs;
+ /*
+ * Read all the refs from the other end
+ */
for (;;) {
unsigned char old_sha1[20];
- unsigned char new_sha1[20];
static char buffer[1000];
char *name;
int len;
@@ -125,27 +181,65 @@ static int send_pack(int in, int out, int nr_match, char **match)
if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
die("protocol error: expected sha/ref, got '%s'", buffer);
name = buffer + 41;
+ ref = xmalloc(sizeof(*ref) + len - 40);
+ memcpy(ref->old_sha1, old_sha1, 20);
+ memset(ref->new_sha1, 0, 20);
+ memcpy(ref->name, buffer + 41, len - 40);
+ ref->next = NULL;
+ *last_ref = ref;
+ last_ref = &ref->next;
+ }
+
+ /*
+ * Go through the refs, see if we want to update
+ * any of them..
+ */
+ for (ref = ref_list; ref; ref = ref->next) {
+ unsigned char new_sha1[20];
+ char *name = ref->name;
+
if (nr_match && !path_match(name, nr_match, match))
continue;
+
if (read_ref(name, new_sha1) < 0)
- return error("no such local reference '%s'", name);
- if (!has_sha1_file(old_sha1))
- return error("remote '%s' points to object I don't have", name);
- if (!memcmp(old_sha1, new_sha1, 20)) {
+ continue;
+
+ if (nr_match && !path_match(name, nr_match, match))
+ continue;
+
+ if (!memcmp(ref->old_sha1, new_sha1, 20)) {
fprintf(stderr, "'%s' unchanged\n", name);
continue;
}
- ref = xmalloc(sizeof(*ref) + len - 40);
- memcpy(ref->old_sha1, old_sha1, 20);
+
+ if (!ref_newer(new_sha1, ref->old_sha1)) {
+ error("remote '%s' points to object I don't have", name);
+ continue;
+ }
+
+ /* Ok, mark it for update */
memcpy(ref->new_sha1, new_sha1, 20);
- memcpy(ref->name, buffer + 41, len - 40);
- ref->next = NULL;
- *last_ref = ref;
- last_ref = &ref->next;
}
+ /*
+ * See if we have any refs that the other end didn't have
+ */
+ if (nr_match) {
+ local_ref_nr_match = nr_match;
+ local_ref_match = match;
+ local_ref_list = last_ref;
+ for_each_ref(try_to_match);
+ }
+
+ /*
+ * Finally, tell the other end!
+ */
+ new_refs = 0;
for (ref = ref_list; ref; ref = ref->next) {
char old_hex[60], *new_hex;
+ if (is_zero_sha1(ref->new_sha1))
+ continue;
+ new_refs++;
strcpy(old_hex, sha1_to_hex(ref->old_sha1));
new_hex = sha1_to_hex(ref->new_sha1);
packet_write(out, "%s %s %s", old_hex, new_hex, ref->name);
@@ -153,7 +247,7 @@ static int send_pack(int in, int out, int nr_match, char **match)
}
packet_flush(out);
- if (ref_list)
+ if (new_refs)
pack_objects(out, ref_list);
close(out);
return 0;